Ratan K. Majumder
Bangladesh Atomic Energy Commission
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Publication
Featured researches published by Ratan K. Majumder.
Journal of Hazardous Materials | 2010
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
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
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
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
Md. Abdul Halim; Ratan K. Majumder; Syeda Afsarun Nessa; Keita Oda; Yoshinario Hiroshiro; Kenji Jinno
Environmental Earth Sciences | 2011
Mirza A.T.M. Tanvir Rahman; Ratan K. Majumder; Syed Hafizur Rahman; Md. Abdul Halim
Archive | 2012
Tanvir Rahman; Syed Hafizur Rahman; Ratan K. Majumder
Arabian Journal of Geosciences | 2013
M. A. Halim; Ratan K. Majumder; Mohammad Nazim Zaman; S. Hossain; M. G. Rasul; Keiko Sasaki
Arabian Journal for Science and Engineering | 2014
M. A. Halim; Ratan K. Majumder; G. Rasul; Y. Hirosiro; Keiko Sasaki; Jun Shimada; Kenji Jinno
Arabian Journal of Geosciences | 2013
Ratan K. Majumder; M. A. Halim; Jun Shimada; Bidyut Baran Saha; A. Zahid; M. Q. Hasan; M. S. Islam
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Bangladesh Council of Scientific and Industrial Research
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