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Dive into the research topics where Ratan K. Majumder is active.

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Featured researches published by Ratan K. Majumder.


Journal of Hazardous Materials | 2010

Evaluation of processes controlling the geochemical constituents in deep groundwater in Bangladesh: Spatial variability on arsenic and boron enrichment

Md. Abdul Halim; Ratan K. Majumder; Syeda Afsarun Nessa; Yoshinari Hiroshiro; Keiko Sasaki; Bidyut Baran Saha; A. Saepuloh; Kenji Jinno

Forty-six deep groundwater samples from highly arsenic affected areas in Bangladesh were analyzed in order to evaluate the processes controlling geochemical constituents in the deep aquifer system. Spatial trends of solutes, geochemical modeling and principal component analysis indicate that carbonate dissolution, silicate weathering and ion exchange control the major-ion chemistry. The groundwater is dominantly of Na-Cl type brackish water. Approximately 17% of the examined groundwaters exhibit As concentrations higher than the maximum acceptable limit of 10 microg/L for drinking water. Strong correlation (R(2)=0.67) of Fe with dissolved organic carbon (DOC) and positive saturation index of siderite suggests that the reductive dissolution of Fe-oxyhydroxide in presence of organic matter is considered to be the dominant process to release high content of Fe (median 0.31 mg/L) in the deep aquifer. In contrast, As is not correlated with Fe and DOC. Boron concentration in the 26% samples exceeds the standard limit of 500 microg/L, for water intended for human consumption. Negative relationships of B/Cl ratio with Cl and boron with Na/Ca ratio demonstrate the boron in deep groundwater is accompanied by brackish water and cation exchange within the clayey sediments.


Arabian Journal of Geosciences | 2015

Paddy soil heavy metal contamination and uptake in rice plants from the adjacent area of Barapukuria coal mine, northwest Bangladesh

M. A. Halim; Ratan K. Majumder; Mohammad Nazim Zaman

This study was carried out to estimate the heavy metal contamination in paddy soil and subsoil and uptake by rice plants collected from Barapukuria coal mine area of Bangladesh. The mean contents of As, Cr, Cu, Mn, Ni, Pb, and Zn in paddy soil and subsoil exceed the world averages, and the observed soils are moderately to extremely polluted with inputs from mining activities. Correlation and regression model analyses suggest that pH and TOC have distinct effect on the availability of observed metals in soils. Sequential extraction of paddy soil and subsoil samples demonstrate that the mobility of heavy metals increases in the order of Cu > Zn > Pb > Fe > Cr > Ni > Mn > As. The uptake of metals in rice root is much higher than those in straw and rice grains. Arsenic, Cr, and Pb uptake in rice grains are 6.87-, 1.58-, and 5.26-fold higher than the maximum permissible concentration which shows a tendency of transformation of these elements from contaminated soil to rice plants.


Journal of Hazardous Materials | 2008

An exploration of nitrate concentrations in groundwater aquifers of central-west region of Bangladesh

Ratan K. Majumder; Mohammad Abul Hasnat; Shahadat Hossain; Keita Ikeue; Masato Machida

Groundwater and river water samples were collected from the study area to investigate the spatial distribution of nitrate (NO(3)(-)) in the central-west region of Bangladesh. The shallow and deep groundwater nitrate concentrations ranged from <0.10 to 75.12 and <0.10 to 40.78 mg/L, respectively. Major river water NO(3)(-) concentrations were ranged from 0.98 to 2.32 mg/L with an average of 1.8 mg/L. The average Cl(-)/NO(3)(-) ratio (4.9) of major river water has been considered as reference point to delineate denitrification processes. The alluvial fan, alluvial, deltaic and coastal deposits shallow groundwater having C1(-)/NO(3)(-) values less than that of the average river water value (4.9), suggested denitrification processes within the aquifers. On the other hand, denitrification processes are insignificant in the Pleistocene terraces area aquifers related to relatively higher concentrations of nitrate. Iron pyrite has been found as insignificant effect on denitrification.


Science of The Total Environment | 2007

Arsenic Attenuation By Oxidized Aquifer Sediments in Bangladesh

Kenneth G. Stollenwerk; George N. Breit; Alan H. Welch; James C. Yount; John W. Whitney; Andrea L. Foster; M. Nehal Uddin; Ratan K. Majumder; Nasir Ahmed


Environmental Monitoring and Assessment | 2010

Arsenic in shallow aquifer in the eastern region of Bangladesh: insights from principal component analysis of groundwater compositions.

Md. Abdul Halim; Ratan K. Majumder; Syeda Afsarun Nessa; Keita Oda; Yoshinario Hiroshiro; Kenji Jinno


Environmental Earth Sciences | 2011

Sources of deep groundwater salinity in the southwestern zone of Bangladesh

Mirza A.T.M. Tanvir Rahman; Ratan K. Majumder; Syed Hafizur Rahman; Md. Abdul Halim


Archive | 2012

Groundwater quality for irrigation of deep aquifer in southwestern zone of Bangladesh

Tanvir Rahman; Syed Hafizur Rahman; Ratan K. Majumder


Arabian Journal of Geosciences | 2013

Mobility and impact of trace metals in Barapukuria coal mining area, Northwest Bangladesh

M. A. Halim; Ratan K. Majumder; Mohammad Nazim Zaman; S. Hossain; M. G. Rasul; Keiko Sasaki


Arabian Journal for Science and Engineering | 2014

Geochemical Evaluation of Arsenic and Manganese in Shallow Groundwater and Core Sediment in Singair Upazila, Central Bangladesh

M. A. Halim; Ratan K. Majumder; G. Rasul; Y. Hirosiro; Keiko Sasaki; Jun Shimada; Kenji Jinno


Arabian Journal of Geosciences | 2013

Hydrochemistry and isotopic studies to identify Ganges River and riverbank groundwater interaction, southern Bangladesh

Ratan K. Majumder; M. A. Halim; Jun Shimada; Bidyut Baran Saha; A. Zahid; M. Q. Hasan; M. S. Islam

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M. A. Halim

Bangladesh Atomic Energy Commission

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Nasir Ahmed

Bangladesh Atomic Energy Commission

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Mohammad Nazim Zaman

Bangladesh Council of Scientific and Industrial Research

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Alan H. Welch

United States Geological Survey

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