Dhar, Ratan

Curriculum Vitae

Assistant Professor
Earth and Physical Sciences

Phone: 718-262-2889
Office Location: AC-2E13
rdhar@york.cuny.edu

Office Hours  
Tuesday and Thursday  11 am to noon or by appointment 

Education

Degree Institution Field Dates
PhD  City University of New York  Earth and Environmental Sciences  2006 
MPhil  City University of New York  Earth and Environmental Sciences  2002 
MS  The University of Chittagong, Bangladesh  Organic Chemistry  1991 
BS  The University of Chittagong, Bangladesh  Chemistry  1988 

Predictions of metal(loid) transport processes in natural system are a critical aspect of decision-making in risk assessment, and remediation strategies. I aim to advance our understanding of how physical, chemical and biological factors interact and control the mobilization of trace metals in natural environment. My research is focused on the local hydrological and geochemical controls in mobilization of heavy metals and nutrients in natural waters. Specifically, I investigate the potential role of microbes and dissolved organic matter (DOM) in mobilization of trace metals in groundwater of contaminated area. Field sampling program and laboratory measurements are combined to study behaviors of these elements in both sea and fresh water environment.

Areas of Expertise

Hydrogeology
Environmental Science
Geochemistry
Analytical techniques in Environmental Geosciences
Biogeochemistry

Books in Field Of Expertise

Ratan Kumar Dhar. Arsenic, A Silent Killer and Its Biogeochemistry in Groundwater. Germany: LAP LAMBERT Academic Publishing GmbH & Co. KG, 2011. 199.

Articles in Field Of Expertise

Dhar, R. K., Y. Zheng, K.A. Radloff, B. Mailloux, K. M. Ahmed and A. van Geen. "Microbes Enhance Mobility of Arsenic in Pleistocene Aquifer Sand from Bangladesh.." Environmental Science and Technology. 45 (7) 2011: 2648–2654.

Chakraborti, D., M. M. Rahman, B. Das, M. Murrill, S. Dey, S. C. Mukherjee, R. K. Dhar, B. K. Biswas, U. K. Chowdhury, S. Roy, S. Sorif, M. Selim, M. Rahman, Q. Quamruzzaman.. "Status of groundwater arsenic contamination in Bangladesh: A 14-year study report.." Water Research.. 44 2010: 5789-5802.

Dhar, R. K., Y. Zheng, M. Stute, A. van Geen, Z. Cheng, M. Shanewaz, M. Shamsudduha, M. A. Hoque, M.W. Rahman, and K.M. Ahmed. "Temporal variability of groundwater chemistry in shallow and deep aquifers of Araihazar, Bangladesh." Journal of Contaminant Hydrology. 99(1-4) 2008: 97-111.

Stute, M., Y. Zheng, P. Schlosser, A. Horneman, R. K. Dhar, M. A. Hoque, A. A. Seddique, M. Shamsudduha, K. M. Ahmed, and A. van Geen, 2007. "Hydrological control of As concentrations in Bangladesh groundwater." Water Resources Research. 43(9) 2007: W09417.

Van Geen A., Y. Zheng, Z. Cheng, Y. He, R. K. Dhar, J.M. Garier, J. Rose, A. Seddique, M.A. Hoque, and K. M. Ahmed. "Impact of irrigating rice paddies with groundwater containing arsenic in Bangladesh." Science of the total Environment. 367 2006: 769-777.

van Geen A., Y. Zheng Z. Cheng, Z. Aziz, A. Horneman, R.K. Dhar, B. Mailloux, M. Stute, B. Weinman, S. Goodbred, A.A. Seddique, M.A. Hoque, and K.M. Ahmed. "A transect of groundwater and sediment properties in Araihazar, Bangladesh: Further evidence of decoupling between As and Fe mobilization.." Chemical Geology. 228(1-3 SPEC. ISS.) 2006: 85-96.

van Geen A., Z. Aziz, A. Horneman, B. Weinman, R.K. Dhar, Y. Zheng, S. Goodbred, R. Versteeg, A.A. Seddique, M.A. Hoque, and K.M. Ahmed. "Preliminary evidence of a link between surface soil properties and the arsenic content of shallow groundwater in Bangladesh.." Journal of Geochemical Exploration. 88 (1-3 SPEC. ISS.) 2006: 157-161.

Zheng, Y., A. van Geen, M. Stute, R.K. Dhar, Z. Mo, Z. Cheng, A. Horneman, I. Gavrieli, H. J. Simpson, and R. Versteeg. "Geochemical and hydrogeological contrasts between shallow and deeper aquifers in two villages of Araihazar, Bangladesh: Implications for deeper aquifers as drinking water sources.." Geochimica Cosmochimica Acta. 69 2005: 5203-5218.

Dhar, R. K., Y. Zheng, P. Rubenstone, and A. van Geen. "A rapid colorimetric method for measuring arsenic concentration in groundwater." Analytica Chimica Acta. 526 2004: 203-209.

Horneman, A., A. van Geen, D. Kent, P. E. Mathe, Y. Zheng, R. K. Dhar, S. O'Connell, M. A. Hoque, Z. Aziz, M. Shamsudduha, A. Seddique, and K. M. Ahmed. "Decoupling of arsenic and iron release to Bangladesh groundwater under reducing conditions. Part I: Evidence from sediment profiles." Geochimica Cosmochimica Acta. 68(17) 2004: 3459-3473.

Zheng, Y., M. Stute, A. van Geen, I. Gavrieli, R. Dhar, H. J. Simpson, P. Schlosser, and K. M. Ahmed. "Redox control of arsenic mobilization in Bangladesh groundwater." Applied Geochemistry. 19(2) 2004: 201-214.

van Geen A., Y. Zheng, R. Versteeg, M. Stute, A. Horneman, R. Dhar, M. Steckler, A. Gelman, A. Small, H. Ahsan, J. Graziano, I. Hussain, and K.M. Ahmed. "Spatial variability of arsenic in 6000 contiguous tube wells in a 25 km2 area of Bangladesh." Water Resources Research. 39(5) 2003: HWC3-1-HWC3-16,1140.

van Geen, A., H. Ahsan, A. Horneman, R. K. Dhar, Y. Zheng, I. Hussain, K. M. Ahmed, A. Gelman, M. Stute, H. J. Simpson, S. Wallace, C. Small, F. Parvez, V. Slavkovich, N. J. LoIacono, M. Becker, Z. Cheng, H. Momotaj, M. Shahnewaz, A. A. Seddique, and J. H. Graziano. "Promotion of well-switching to mitigate the current arsenic crisis in Bangladesh." Bulletin of the World Health Organization. 80 2002: 732-737.

Roy, S., Q. Quamruzzaman, M. Rahman, D. Chakraborti, R. Dhar, B. Goutam. "Arsenic and its impact on health." IAHS-AISH publication. 260 1999: 30.

Chakraborti, D.,G. Samanta, B.K. Mandal, T.R. Chowdhury, C.R. Chanda, B.K. Biswas, R.K. Dhar, G.K. Basu and K.C. Saha. "Calcutta’s Industrial pollution: Groundwater arsenic contamination in a residential area and sufferings of people due to industrial effluent discharge- An eight year study report.." Current Science. 74 (4) 1998: 346-355.

Biswas, B.K., R.K. Dhar, G. Samanta, B.K. Mandal, D. Chakraborti, I. Faruk, K.S. Islam, M.M. Chowdhury, A. Islam, and S. Roy. "Detailed study report of Samta, one of the arsenic-affected villages of Jessore District, Bangladesh.." Current Science. 74(4) 1998: 134-145.

Dhar, R.K., B.K. Biswas, G. Samanta, B.K. Mandal, D. Chakraborti, S. Roy, A.W. Khan, S.A. Ahmed, S.A. S.A., Hadi. "Groundwater arsenic calamity in Bangladesh." Current Science. 73(1) 1997: 48-59.

Mandal, B.K., T. R. Chowdhury, G. Samanta, G.K. Basu, P.P. Chowdhury, C.R. Chanda, D. Lodh, N.K. Karan, R. K. Dhar, D.K. Tamili, D. Das, K.C. Saha, and D. Chakraborti. "Chronic arsenic toxicity in West Bengal." Current Science. 72(2) 1997: 114-117.

Mandal, B.K., T. R. Chowdhury, G. Samanta, G.K. Basu, P.P. Chowdhury, C.R. Chanda, D. Lodh, N.K. Karan, R. K. Dhar, D.K. Tamili, D. Das, K.C. Saha, and D. Chakraborti. "Arsenic in groundwater in seven districts of West Bengal, India-The biggest arsenic calamity in the world.." Current Science. 70(11) 1996: 976-986.

Refereed Proceedings in Field Of Expertise

Dhar R., Chavez, A, Emofovwah, O., Gil, Y., Aremu, O., Quach, V.. "Microbial mobilization from urban soils to lakes and ponds." Geological Society of America Annual Meeting & Exposition.. Oct. 27-30, 2013: .

Hussain, N., Gil, Y., Alladeen, R., Dhar, R. K, Schleifer, S., Khandaker, N.I.. "Physical and chemical characterization of urban and rural freshwater bodies, New York City and up-state New York." Geological Society of America Annual Meeting & Exposition.. Oct. 27-30, 2013: .

Adabi, B., Seetaram, J., Dhar, R. K, Schleifer, S., Khandaker, N.I.. "Differential pulse cathodic stripping voltammetry (DPCSV) for simultaneous determination of Cu, Pb, Cd and Zn in environmental samples.." Geological Society of America Annual Meeting & Exposition.. Oct. 27-30, 2013: .

Chavez, A, Emofovwah, O., Gil, Y., Dhar, R. K, Schleifer, S., Khandaker, N.I.. "Microbial mobilization from urban soils to lakes and ponds: examples from New York City." Geological Society of America Annual Meeting & Exposition.. Oct. 27-30, 2013: .

Dhar, R. K. and Ghosh U.. "Detection of fecal indicative bacteria (FIB) in an urban environment of Bowne Pond Park at Flushing, New York City, USA.." Geological Society of America Annual Meeting & Exposition.. 44(7) Nov.4-7, 2012: 111.

Dhar, R. K. and Haque, E.. "Heavy metal uptake by green algae during removal of nutrients from New York City waste water.." Geological Society of America Annual Meeting & Exposition.. 44(7) Nov.4-7, 2012: 111.

Dhar, R. K. and Ruksana, A.. "X-ray fluorescence (XRF) spectrometry: a rapid and reliable method to monitor the occurrence of heavy metals in environmental samples.." Geological Society of America Annual Meeting & Exposition.. 44(7) Nov.4-7, 2012: 112.

Dhar, R. K..Hussain, N., Insanali, N.. "Nutrients and Heavy metal load of the water in urban lakes and ponds of Queens County in New York City, USA.." Geological Society of America Annual Meeting & Exposition.. 44(7) Nov.4-7, 2012: 112.

Dhar, R. K.. "Occurrence of fecal indicative bacteria (FIB) in urban lakes and estuaries of New York City, USA.." Geological Society of America Annual Meeting & Exposition.. 44(7) Nov.4-7, 2012: 609.

Dhar, R. K.. "Lessons from arsenic research in Bangladesh: its implication for the sustainability of aquifers as long term safe water sources.." Geological Society of America Annual Meeting & Exposition.. 44(7) Nov.4-7, 2012: 156.

Dhar, R. K.. "Evaluation of the sorption capacity of biochar amended sediments: an effective way to remove contaminants from natural resources and to reduce carbon emission.." Geological Society of America Annual Meeting & Exposition.. 44(7) Nov.4-7, 2012: 497.

Dhar, R. K.. "Biogeochemistry of arsenic in groundwater and its implication for evaluating the sustainability of aquifers as a long-term safe water sources." Geological Society of America Annual Meeting & Exposition.. 43(5) Oct. 9-12, 2011: 669.

Singh, A. and Dhar, R. K.. "Sorption of nutrients and heavy metals by biochar amended potting soil as a vehicle for climate change." Geological Society of America Annual Meeting & Exposition.. 43(5) Oct. 9-12, 2011: 72.

DeFabio, D. and Dhar, R. K.. "Microbial contamination from nutrient-rich freshwater inflows in lakes and urban estuaries of New York City, USA." Geological Society of America Annual Meeting & Exposition.. 43(5) Oct. 9-12, 2011: 582.

Goddard, C. and Dhar, R. K.. "Optimization of a colorimetric method to determine arsenic speciation in column experiments to study the effect of iron, manganese, and phosphate concentration in groundwater in arsenic removal process." Geological Society of America Annual Meeting & Exposition.. 43(5) Oct. 9-12, 2011: 674.

Tirmizi, A., Singh, A., Khandaker, N.I., Schleifer, S., Quadros, R. and Dhar R. K.. "Handheld X-ray Fluorescence (XRF) as a rapid and reliable tool for environmental monitoring of solids." Geological Society of America Annual Meeting & Exposition.. 43(5) Oct. 9-12, 2011: 131.

Dhar, S., Anciro, S. and Dhar R. K.. "Simultaneous determination of copper, cadmium, lead and zinc in natural waters by Differential Pulse Cathodic Stripping Voltammetry (DPCSV)." Geological Society of America Annual Meeting & Exposition.. 43(5) Oct. 9-12, 2011: 132.

Parvin M., Dhar, S., Anciro, S., Maldonado, L., Quadros, R., Singh, A., Chan, J. and Dhar R. K.. "The impact of urbanization and land-use on surface water quality in Queens County of New York City." Geological Society of America Annual Meeting & Exposition.. 43(5) Oct. 9-12, 2011: 132.

Maldonado, L., Parvin M., Dhar, S., Anciro, S., Singh, A., Tirmizi, A. and Dhar R. K.. "Occurrence of Fecal Indicative Bacteria (FIB) in Lakes and ponds of Queens County, New York City, USA." Geological Society of America Annual Meeting & Exposition.. 43(5) Oct. 9-12, 2011: 131.

DeFabio, D., Solis, S., Gopal, S., Ramraj, S. and Dhar R. K.. "Temporal and spatial variation in occurrence of fecal indicative bacteria (FIB) in Meadow lake, Queens, New York City." Geological Society of America Annual Meeting & Exposition.. 43(5) Oct. 9-12, 2011: 130.

Singh, A., Singh, K., Ramesh, R., Pasram, K. and Dhar R. K.. "The evaluation of the efficiency of biochar in removal of environmental contaminants." Geological Society of America Annual Meeting & Exposition.. 43(5) Oct. 9-12, 2011: 130.

DeFabio, D. and Dhar R. K.. "Occurrences of nutrients and Fecal Indicator Bacteria (FIB) to nearshore waters of Jamaica Bay, Western Long Island Sound, New York." Geological Society of America Annual Meeting & Exposition.. 42(5) Oct. 31-Nov. 3, 2010: 40-23.

Neal A., Haug, J., Socki, R.A., Ocheltree, T., Petroske, E., Johannesson, K., Dhar, R. K. and Datta, S.. "Understanding heterogeneity in sediment geochemistry in contrasting groundwater arsenic bearing environments in Murshidabad, West Bengal, India." Geological Society of America Annual Meeting & Exposition.. 42(5) 31-Nov. 3, 2010: 233-13.

Goddard, C., Anciro, S. and Dhar R. K.. "Optimization of a colorimetric method to determine arsenic species and phosphate in sea water." Geological Society of America Annual Meeting & Exposition.. 42(5) 31-Nov. 3, 2010: 40-21.

Beauzile, W., Agbor, I. and Dhar R. K.. "Investigation of hydro-geochemical properties of the upper glacial aquifer, Jamaica, New York." Geological Society of America Annual Meeting & Exposition.. 42(5) 31-Nov. 3, 2010: 40-18.

Dhar, R. K., Y. Zheng, C.W. Saltikov, K. A. Radloff, B. Mailloux and A. van Geen. "Microbe enhanced mobility of Arsenic in deep Pleistocene aquifers in Bangladesh." The Third International Congress on Arsenic in the Environment” held in National Cheng Kung University, Tainan, Taiwan,. 2010: .

Dhar, R. K., Cunningham A., Neal A. and Datta, S.. "Solid phase arsenic and iron speciation in sediment core samples collected from three villages in an arsenic affected district of West Bengal, India." Geological Society of America Annual Meeting & Exposition.. 42(5) 31-Nov. 3, 2010: 233-14.

Shami M., Musid A., Abedin, S., Khandaker, N.I. and Dhar R. K.. "A Geochemical and sedimentological survey of the northern Gateway NRA, New York." Geological Society of America Annual Meeting & Exposition.. 42(5) 31-Nov. 3, 2010: 40-13.

DeFabio, D. and Dhar R. K.. "Water Quality of Brackish Water in Jamaica Bay: Monitoring of Nutrients and Fecal Indicator Bacteria." Long Island Sound biennial research conference. Oct, 29-30, 2010: .

Dhar, R. K.. "Heavy metal and nutrient concentrations in Jamaica Bay, New York." Geological Society of America 2009 Annual Meeting & Exposition. 41(7) Oct. 18-22, 2009: 251-9.

Dhar, R. K. and Y. Zheng. "Hydro-geochemistry of groundwater and its implications for arsenic mobilization in shallow and deep Aquifer of Araihazar, Banglaadesh." Geological Society of America 2009 Annual Meeting & Exposition. 41(7) Oct. 18-22, 2009: 126-5.

Nguyen, Y., Dhar, S., N. Ma and R. K. Dhar. "Spatial variability of nutrient concentrations in Jamaica Bay, NY." Geological Society of America 2009 Annual Meeting & Exposition. 41(7) Oct. 18-22, 2009: 115-3.

Dhar, S., Y. Nguyen and R. K. Dhar. "Physical and chemical characterization of Jamaica Bay sediments." Geological Society of America 2009 Annual Meeting & Exposition. 41(7) Oct. 18-22, 2009: 115-4.

Beauzile, W., Y. Nguyen, S. Dhar, K. Narine, N. Ma, K. Clauson, A. Cunningham and R. K. Dhar. "Spatial Distribution of Nutrients and Heavy Metals in Jamaica Bay Area, Western Long Island, New York." Annual Meeting of the NYMSC (New York Marine Science Consortium). September 12, 2009: .

Dhar, R.K., Y. Zheng, K. Radloff, B. Mailloux, C.W. Saltikov, C.W. and A. van Geen. "Microbes Enhanced Mobility of Arsenic, without iron reduction in deep Bangladesh Aquifer.." EOS Trans, American Geophysical Union 2008 Annual Meeting. 89(53) Dec. 15-19, 2008: .

Dhar, R.K., Y. Zheng, K. Radloff, B. Mailloux, C.W. Saltikov, C.W. and A. van Geen. "Microbes and arsenic mobilization in deep Pleistocene aquifer of Bangladesh: limited role of iron reduction." Geological Society of America 2006 Annual Meeting & Exposition. Oct. 2006: .

Dhar, R.K., A. van Geen, K. Radloff, B. Mailloux, C.W. Saltikov, Y. Zheng. "The role of microbes and organics in mobilization of arsenic in deep Pleistocene aquifers of Bangladesh." Sigma XI The Scientific Research Society Queens College Chapter. March 2005: .

Dhar R.K., Y. Zheng, M. Stute, Z. Cheng, A. van Geen, M. Shamsudduha, M.A. Hoque, M. Shanewaz and K. M. Ahmed. "Declining temporal variability of major ions concentrations but not arsenic concentrations as the function of groundwater age in the Ganges-Brahmaputra-Meghna (GBM) delta of Bangladesh." American Geophysical Union 2004 Annual Meeting. Dec. 2004: .

Dhar R.K., Yan Zheng, James Rubenstone and Alexander vanGeen. "A rapid colorimetric method for measuring dissolved inorganic arsenic concentrations in groundwater." Superfund Basic Research-EPA Annual Meeting – Integrating perspectives, Hanover, New Hampshire, USA. Nov. 9-12, 2003: .

Dhar R.K., Y. Zheng, P. Rubenstone, and A. van Geen. "A rapid colorimetric method for measuring arsenic concentrations in groundwater." 226th American Chemical Society National Meeting. Sept. 7-11, 2003: .

Dhar R.K., Y. Zheng, M. Shams, M. Shanewaz, K.M. Ahmed, M. Stute and A. van Geen. "Little temporal variability of groundwater arsenic concentration in a spatially heterogeneous aquifer system in the Ganges-Brahmaputra delta of Bangladesh." Superfund Basic Research-EPA Annual Meeting - Transitioning basic science into practical applications to meet environmental and public health challenges,Tucson, Arizona. Nov. 3-6, 2002: .

Dhar R.K., I. Gravrieli, Y. Zheng, M. Stute, A. vanGeen, and K.M. Ahmed. "An inexpensive, field base chromatographic method to removal of total arsenic from the samples prior to determining the sulfur isotopes in groundwater." the Sigma conference, Queens College, NY. Sept. 2002: .

Dhar R.K., Alexander van Geen, Yan Zheng, James Rubenstone and P. Perona. "Adaptation and modification of a colorimetric method for simultaneous field determination of inorganic arsenic and phosphate in groundwater, Arsenic in Drinking Water." International Conference, Columbia University, New York. Nov. 26-27, 2001: .

Zheng, Y., R. Dhar, M. Stute, A. van Geen, A. Horneman, I. Gravrieli, R. Versteeg, M. Steckler, S. Goodbred, K.M. Ahmed. "Variability of Arsenic concentrations in Tube wells from one Village in Araihazar Upazila, Narayanganj District of Bangladesh." GSA Fall Meeting. Nov. 2001: .

van Geen, A., A. Horneman, R. Dhar, Y. Zheng, M. Stute, H.J. Simpson, A. Gelman, K.M. Ahmed. "Remediation options for the arsenic crisis in Bangladesh: Implications from the recent survey of 5000 wells in Araihazar Upazila, Narayanganj district of Bangladesh." EOS. 82 2001: 204.

Dhar R.K., A. Horneman, A. van Geen, M. Stute, J. Simpson, I. Gravrieli, K.M. Ahmed, J. Graziano and Y. Zheng. "Redox control of arsenic mobilization in Bangladesh groundwater." Superfund Basic Research-EPA Annual Meeting – Oxidative Processes: stress to remediation at Chapel Hill, North Carolina, USA. Dec. 12-14, 2000: .

Stute, M., Y. Zheng, A. van Geen, H.J. Simpson, R. Dhar, I. Gravrieli, P. Schlosser and K.M. Ahmed. "Groundwater Flow Dynamics and As Geochemistry in the Central Ganges-Brahmaputra Delta of Bangladesh." AGU Fall Meeting. Dec. 2000: .

Gravrieli, I., Y. Zheng, A. van Geen, M. Stute, H.J. Simpson, R. Dhar, K.M. Ahmed and S.L. Goldstein. "Hydrogeochemical study of the mobilization of arsenic in Bangladesh groundwater-the role of redox condition." Goldschmidt Conference, Oxford(England). Sept. 4-9th , 2000: .

Zheng, Y., M. Stute, A. van Geen, I. Gravrieli, H.J. Simpson, R. Dhar, K.M. Ahmed. "Arsenic mobilization in Bangladesh groundwater: a case study of geochemistry and hydrology in Naryanganj and Laximpur district." 31st International Geological Congress 2000-‘Geology and Sustainable Development-Challenges of the Third Millennium’, Pre-congress Workshop ‘Arsenic in Groundwater of Sedimentary Aquifer’, Rio de Janeiro (Brazil). Aug. 3-5th, 2000: .

Dhar, R.K., B.K. Biswas, G. Samanta, B.K. Mandal, T.R. Chowdhury, C.R. Chanda, G.K. Basu, D. Chakraborti, S. Roy, S. Kabir, A. Jafar, I. Faruk, K. Islam, M. Choudhury, A. Islam. "Groundwater arsenic contamination and sufferings of people in Bangladesh may be the biggest arsenic calamity in the world." International Conference on arsenic pollution of groundwater in Bangladesh: Causes, Effects and Remedies, Dhaka, Bangladesh. Feb. 1998: .

Chapters in Field Of Expertise

DeFabio, D., Beauzile, W. and Dhar, R. K.. "Water Quality of Brackish Water in Jamaica Bay: Monitoring of Nutrients and Fecal Indicator Bacteria (FIB)." Long Island Sound biennial research conference proceedings. 2011: 9-14.

Dhar, R. K., Y. Zheng, C.W. Saltikov, K. A. Radloff, B. Mailloux and A. van Geen.. "Microbe enhanced mobility of Arsenic in deep Pleistocene aquifers in Bangladesh.." Arsenic in Geospehre and Human Diseases-Jean, Bundschuh and Bhattacharyya (eds).. 2010: 143-145.

Chowdhury, U.K., Biswas, B.K., Samanta, G., Mandal, B.K,, Chowdhury, T.R., Dhar, R.K., Basu, G.K., Chanda, Saha, K.C., Roy, S., Kabir, S., and Chakraborti, D.. "Groundwater arsenic calamity in West Bengal-India and Bangladesh." Bioavailability and its potential role in risk assessment. 2000: .

Mandal, B.K, Biswas, B.K., Dhar, R.K., Samanta G, Chowdhury, T.R., Basu, G.K., Chanda, C.R., Saha, K.C., Kabir, S., Roy, S.,. and Chakraborti, D.. "Groundwater arsenic contamination and sufferings of people in West Bengal, India and Bangladesh: status report up to March 1998." Metals and Genetics. 3 1999: 41-65.

Chowdhury, U.K., Biswas, B.K., Dhar, R.K., Samanta G, Mandal, B.K., Chowdhury, T.R., Chakraborti, D., Kabir, S., Roy, S.. "Groundwater arsenic contamination and sufferings of people in Bangladesh.." Arsenic Exposure and Health Effects. 1999: 165-182.

Chowdhury, T.R., Mandal, B.K., Samanta, G., Dhar, R.K., Basu, G.K., Chowdhury, P.P., Chanda, C.R., Karan, N.K., Lodh, D., Das, D., Saha, K.C., and Chakraborti, D.. "Arsenic in groundwater in seven districts of West Bengal, India: the biggest arsenic calamity in the world: The status report upto August, 1995." Arsenic Exposure and Health Effects. 1997: 91-111.

Presented Papers, Lectures, and Exhibitions and Performances

" Evaluation of the sorption capacity of biochar amended sediments: an effective way to remove contaminants from natural resources and to reduce carbon emission. " Nov. 2012: Geological Society of America 2012 Annual Meeting & Exposition.

" Lessons from arsenic research in Bangladesh: its implication for the sustainability of aquifers as long term safe water sources. " Nov. 2012: Geological Society of America 2012 Annual Meeting & Exposition.

" Occurrence of fecal indicative bacteria (FIB) in urban lakes and estuaries of New York City, USA. " Nov. 2012: Geological Society of America 2012 Annual Meeting & Exposition.

" Remote sensing and arsenic biogeochemistry in Bangladesh and its implication for the sustainability of deep aquifers as long term drinking water sources " May 25, 2012: NOAA-CREST Center , CCNY of CUNY.

" The sustainability of aquifers as long term drinking water sources in Bengal Basin " March, 29, 2012: GEOS (Geology, Earth Science and Oceanography) talk series.

" Mitigation of arsenic problem in Bangladesh " Feb. 25, 2012: WARDS (Welfare Association For Rural Development, Inc).

" groundwater level rise in SE Queens " Nov. 2011: The Civic Society meeting of Federated Blocks of Laurelton, Jamaica..

" Biogeochemistry of arsenic in groundwater and its implication for evaluating the sustainability of aquifers as a long-term safe water sources " Oct. 2011: Geological Society of America 2011 Annual Meeting & Exposition.

" Solid phase arsenic and iron speciation in sediment core samples collected from three villages in an arsenic affected district of West Bengal, India " Nov. 3, 2010: Geological Society of America 2010 Annual Meeting & Exposition.

" The sustainability of aquifers as long term drinking water sources in Bengal Basin " June, 2010: CUNY Graduate Center, Department of Chemistry.

" "Water and its contamination” " April , 2010: Earth Day organized by Community Leaders and York college community.

" Groundwater as heat sink and/or source; an realistic approach to solve the groundwater problem in SE Queens " Nov. 2009: Participating York College's faculty,staffs, students at Sustainability Planning Meeting.

" Heavy metal and nutrient concentrations in Jamaica Bay, New York " Oct. 21, 2009: Participating scientists and students at Hydrology session of GSA international meeting at Portland, Oregon.

" Groundwater hydrogeochemistry and its implications for arsenic mobilization in shallow and deep aquifers in Araihazar, Bangladesh " Oct. 19, 2009: Participanting scientists and students at Hydrology session of GSA international meeting at Portland, Oregon.

" Spatial variability of nutrient concentrations in Jamaica Bay, NY " Oct. 19, 2009: Participating teachers and students at GSA international meeting at Portland, Oregon.

" Physical and chemical characterization of Jamaica Bay sediments " Oct. 19, 2009: Participating teachers and students at GSA international meeting at Portland, Oregon.

" Water contamination: a threat to human health and socioeconomic condition " July, 2009: NYC high school science teachers and students attending the workshop at York College.

" Water quality of south east Queens, New York " April 24, 2009: York College scientists and community leaders on Earth Day.

" Microbes Enhanced Mobility of Arsenic, without iron reduction in deep Bangladesh Aquifer. " Dec. 17, 2008: Participating scientists and students at Hydrology session of AGU international meeting at Sanfrancisco, CA.

" Microbes and arsenic mobilization in deep Pleistocene aquifer of Bangladesh: limited role of iron reduction " Oct. 2006: Geological Society of America 2006 Annual Meeting & Exposition.

" The role of microbes and organics in mobilization of arsenic in deep Pleistocene aquifers of Bangladesh " March. 2005: Sigma XI The Scientific Research Society Queens College Chapter.

" Declining temporal variability of major ions concentrations but not arsenic concentrations as the function of groundwater age in the Ganges-Brahmaputra-Meghna (GBM) delta of Bangladesh " Dec 14, 2004: Participating scientists and students at Hydrology session of AGU international meeting at Sanfrancisco, CA.

" A rapid colorimetric method for measuring dissolved inorganic arsenic concentrations in groundwater " Nov. 2003: Superfund Basic Research-EPA Annual Meeting – Integrating perspectives, Hanover, New Hampshire, USA.

" A rapid colorimetric method for measuring arsenic concentrations in groundwater " Sept. 2003: 226th American Chemical Society National Meeting.

" Little temporal variability of groundwater arsenic concentration in a spatially heterogeneous aquifer system in the Ganges-Brahmaputra delta of Bangladesh " Nov. 2002: Superfund Basic Research-EPA Annual Meeting - Transitioning basic science into practical applications to meet environmental and public health challenges,Tucson, Arizona.

" An inexpensive, field base chromatographic method to removal of total arsenic from the samples prior to determining the sulfur isotopes in groundwater " Sept. 2002: the Sigma conference, Queens College, NY.

" Adaptation and modification of a colorimetric method for simultaneous field determination of inorganic arsenic and phosphate in groundwater, Arsenic in Drinking Water " Nov. 2001: International Conference, Columbia University, New York.

" Variability of Arsenic concentrations in Tube wells from one Village in Araihazar Upazila, Narayanganj District of Bangladesh " Nov. 2001: Geological Society of America 2006 Annual Meeting & Exposition.

" Redox control of arsenic mobilization in Bangladesh groundwater " Dec. 2000: Superfund Basic Research-EPA Annual Meeting – Oxidative Processes: stress to remediation at Chapel Hill, North Carolina, USA.

" Arsenic mobilization in Bangladesh groundwater: a case study of geochemistry and hydrology in Naryanganj and Laximpur district " Aug. 2000: 31st International Geological Congress 2000-‘Geology and Sustainable Development-Challenges of the Third Millennium’, Pre-congress Workshop ‘Arsenic in Groundwater of Sedimentary Aquifer’, Rio de Janeiro (Brazil).

" Hydrogeochemical study of the mobilization of arsenic in Bangladesh groundwater-the role of redox condition " Sept. 2000: Goldschmidt Conference, Oxford(England).

" Groundwater Flow Dynamics and As Geochemistry in the Central Ganges-Brahmaputra Delta of Bangladesh " Dec. 2000: American Geophysical Union 2000 Annual Meeting.

" Groundwater arsenic contamination and sufferings of people in Bangladesh may be the biggest arsenic calamity in the world " Feb. 1998: International Conference on arsenic pollution of groundwater in Bangladesh: Causes, Effects and Remedies, Dhaka, Bangladesh.

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Professional Honors, Prizes, Fellowships

President Award for Undergraduate Research Engagement: April 18, 2013.

"2013 Snowy Egret" Award for Community Environmental Service: March, 2013.

Provost Award for Undergraduate Research Engagement: April 19, 2012.

Early Career Geoscience Faculty Workshop Award: June, 2009.

NIEHS/SBRP Research Fellowship: 2001-2006.

Graduate Center, CUNY Teaching Fellowship: 2002-2004.

Graduate Center, CUNY Science Fellowship: 2000-2002.

Best Student Poster Award, EPA Science Forum at SBRP meeting: 2000.

Asia Arsenic Network (Japan) Research Fellowship: 1996-1998.

Indian School of Mines (India) Research Fellowship: 1994-1995.

Grants-In-Aid

PSC-CUNY Research Awards (Traditional B), Mobilization of microbes from urban soils and elevated fecal indicator bacteria (FIBs) in freshwater lakes/ponds and brackish water of New York City estuary. July 2013: $6000.00.

GRTI (Graduate Research and Technology Initiative), Characterization of dissolved organic matters (DOM) in natural water and its role on the mobilization of heavy metals in subsurface environment. August 2012: $ 20, 000.00.

PSC-CUNY Research Awards (Traditional B), Evaluation of the sorption capacity of biochar amended sediments: an effective way to remove contaminants from natural resources and to reduce carbon emission. July 1, 2012: $ 6,000.00.

NYCSEF(New York City Science and Engineering Fair), Water Quality of lakes and ponds of Queens County, New York City. July 2011: $ 1,000.00.

GRTI (Graduate Research and Technology Initiative), Soil and sediment size analysis in relation to understanding groundwater flow dynamics. August 2011: $ 10, 507.00.

GRTI (Graduate Research and Technology Initiative), Acquisition of multi-instruments to investigate the nutrient cycling in Jamaica Bay, western Long Island of New York. October 2009: $ 25,000.00.

NYCSEF(New York City Science and Engineering Fair), Heavy matal and nutrient concentrations at Jamaica Bay. July 2009: $ 700.00.

GRTI (Graduate Research and Technology Initiative), Acquisition of Horiba-Jobin Spectrofluorometer "Fluoromax-4P" to study the dynamics of dissolved organic matter in mobilization of heavy metals in surface and/or subsurface coastal environment. October 2008: $ 27, 500.00.

Offices Held In Professional Societies

Policy member, New York Marine Science Consortium (NYMSC) committee: Sept. 2008-present.

Member, Mineralogical Society of America: 2008-present.

Member, Geochemical Society of America: 2009.

Member, Geological Society of America: 2005-present.

Member, Geology and Health: 2009.

Member, American Geophysical Union: 2004-present.

Member, American Chemical Society: 2003-present.

Member, National Association of Geoscience Teachers: 2008-present.

Member, International Association of Hydrological Sciences: 2008-present.

Other Professional Activities and Public Service

Reviewed the manuscript “Arsenic speciation in aquatic organisms around the industrial and municipal area of the Pohang City, Korea: Species-specific bioconcentration and biotransformation” Hong et al., Submitted to Environmental Science and Technology.: September 2013.

Reviewed the manuscript “Abiotic and biotic factors influencing the mobility of arsenic in island groundwater of the Okavango Delta, Botswana” Mladenov et al., Submitted to Hydrology.: May 2013.

NSF GRFP (Graduate Research Fellowship Program) Reviewer Panelist: January 2013.

Reviewed the manuscript “Metals Pollution Determination and Assessment in Petroleum Impacted Rivers in the Niger- Delta Region of Nigeria” Owamah H. I., Submitted to Journal of Earth Science and Climate Change.: December 2012.

Reviewed the manuscript “Improved Sustainability of Water Supply Options in Areas with Arsenic-Impacted Groundwater.” McBean et al. , Submitted to Water (ISSN 2073-4441).: August 2012.

Reviewed the manuscript “Assessment of nickel tolerance in mung bean (Vigna radiata) using photosynthesis, antioxidants and proline as biomarkers.” Yusuf et al. , Submitted to Journal of Environmental Monitoring and Assessment.: July 2012.

Reviewed the manuscript “Spatial and Temporal patterns of Groundwater Arsenic in Shallow and Deep Aquifers of Yinchuan Plain, China.” Han et al. , Submitted to Journal of Geochemical Exploration.: March 2012.

Reviewed the manuscript "Mobilization and speciation of arsenic from altered rock with slightly alkaline pH in the absence of atmospheric oxygen and carbon dioxide.” Tabelin et al. , Submitted to Journal of Applied Geochemistry.: March 2012.

Re- reviewed the manuscript “Geochemistry and mobilization of arsenic in Shuklaganj area of Kanpur-Unnao district, Uttar Pradesh, India.” Chauhan et al. Submitted to Journal of Environmental Monitoring and Assessment.: August 2011.

Reviewed the manuscript "Geochemistry and mobilization of arsenic in Shuklaganj area of Kanpur-Unnao district, Uttar Pradesh, India.” Chauhan et al. Submitted to Journal of Environmental Monitoring and Assessment.: April 2011.

Reviewed the manuscript “Comparing spatial and temporal of variations in shallow wetland groundwater quality.” Pieber et al. Submitted to Journal of Hydrology.: March 2011.

Reviewed the manuscript “On-site speciation of arsenic in well waters in West Bengal(India) by cathodic and anodic stripping voltammetry.” Gibbon-Walsh et al. Submitted to Journal of Environmental Science and Technology.: Feb. 2011.

Mentor, York College Summer Brdge Program for HS and Undergraduates: 2010-present.

Reviewed the manuscript “Palaeosol control on groundwater flow and pollutant distribution: the example of arsenic.” McArthur et al. submitted to Journal of Environmental Science and Technology.: Oct. 2010.

Reviewed the manuscript “Determination of inorganic arsenic species by hydride generation atomic absorption spectrophotometry compared with cathodic stripping voltammetry.” Wararattananurak et al. Submitted to Analytica Chemica Acta.: Jan. 2010.

Mentor, Graduate Research program funded by DOE (2 graduate students): Sept. 2009- present.

Judge, Junior Science and Humanities Symposium, YC Science and Mathematics Expo: 2009-present.

Reviewed NSF grant proposal on geosciences “Multiphysics research and education for understanding coupled mechanical-biogeochemical surface-subsurface processes”.: Sept. 2009-.

Reviewed NSF grant proposal on hydrogeological sciences: Effective Derivation of Molecular Environment Geoscience Research”: Sept. 2009.

Mentor, High School Students, participating in NSF funded Science programs at York College: July 2009.

Attended in panel discussion of HIGH LEVEL SYMPOSIUM on water security at the United Nations organized by the World Water Organization: Feb. 2009.

Reviewed the manuscript “Assessment of arsenic contamination in groundwater along the Ganges alluvial plain of Kanpur district, Uttar Pradesh, India and possible plan of action.” Chauhan et al. Submitted to Journal of Environmental Management.: Feb. 2009.

Reviewed the manuscript “ Speciation of Arsenic in Groundwater from Inner Mongolia” Gong et al. Submitted to Analytica Chemica Acta.: March 2006.

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Dhar, Ratan
 

Dhar, Ratan
Assistant Professor
Earth and Physical Sciences