Implications of organic matter on arsenic mobilization into groundwater: Evidence from northwestern (Chapai-Nawabganj), central (Manikganj) and southeastern (Chandpur) Bangladesh

Reza, A.; Jean, Jiin-Shuh; Lee, Ming Kuo; Liu, Chia Chuan; Bundschuh, Jochen; Yang, Huai Jen; Lee, Jyh Fu; Lee, Yao-Chang

doi:10.1016/j.watres.2010.09.004

Cited by 74 publications

(22 citation statements)

References 30 publications

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“…10) and the results indicate similar C org loads for GBM sediments. The relative abundances of terrestrial and marine biomarkers as well as their stable isotopic compositions show that C org is largely dominated by terrestrial matter, as already observed for ancient Bengal fan sediments (France-Lanord and Derry 1994; Reza et al 2010b). The Ganges flood plain appears to be able to preserve and bury terrestrial C org exported by the Ganges system.…”

Section: Groundwater Geochemistry and As Mobilizationsupporting

confidence: 75%

Interrelationship of TOC, As, Fe, Mn, Al and Si in shallow alluvial aquifers in Chapai-Nawabganj, Northwestern Bangladesh: implication for potential source of organic carbon

et al. 2010

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Two boreholes and ten piezometers in the Ganges flood plain were drilled and installed for collecting As-rich sediments and groundwater. Groundwater samples from the Ganges flood plain were collected for the analysis of cations (Ca 2? , Mg 2? , K ? , Na ? ), anions (Cl -, NO 3 -, SO 4 2-), total organic carbon (TOC), and trace elements (As, Mn, Fe, Sr, Se, Ni, Co, Cu, Mo, Sb, Pb). X-ray powder diffraction was performed to characterize the major mineral contents of aquifer sediments and X-ray fluorescence (XRF) to analyze the major chemical composition of alluvial sediments. Results of XRF analysis clearly show that fine-grained sediments contain higher amounts of trace element because of their high surface area for adsorption. Relative fluorescence index (15-38 QSU) of humic substance in groundwater was measured using spectrofluorometer, the results revealed that groundwater in the Ganges flood plain contains less organic matter (OM). Arsenic concentration in water ranges from 2.8 to 170 lg/L (mean 50 lg/L) in the Ganges flood plain. Arsenic content in sediments ranges from 2.1 to 14 mg/kg (mean 4.58 mg/kg) in the flood plains. TOC ranges from 0.49 to 3.53 g/kg (mean 1.64 g/kg) in the Ganges flood plain. Arsenic is positively correlated with TOC (R 2 = 0.55) in sediments of this plain. Humic substances were extracted from the sediments from the Ganges flood plain. Fourier transform infrared analysis of the sediments revealed that the plain contains less humic substances. The source of organic carbon was assigned from d 13 C values obtained using elemental analysis-isotope ratio mass spectrometry (EA-IRMS); the values (-10 to -29.44%) strongly support the hypothesis that the OM of the Ganges flood plain is of terrestrial origin.

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Section: Groundwater Geochemistry and As Mobilizationsupporting

confidence: 75%

Interrelationship of TOC, As, Fe, Mn, Al and Si in shallow alluvial aquifers in Chapai-Nawabganj, Northwestern Bangladesh: implication for potential source of organic carbon

et al. 2010

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“…A poor correlation exists between As with Fe (r = 0.305, p \ 0.05) and Mn (r = 0.142, p \ 0.05), whereas As shows significant correlations with P (r = 0.773, p \ 0.01) and Mo (r = 0.543, p \ 0.01). So, the correlations between As, Fe, and Mn in groundwater are due to the precipitation of dissolved Fe as siderite solids (FeCO 3 ) or rhodochrosite (MnCO 3 ) under reduced environmental conditions (Reza et al 2010a). High As, low Fe, low Mn in groundwater of the Meghna flood plain in southeastern parts of Bangladesh are evaluated by Reza et al (2010b).…”

Section: Correlation Matrix Analysismentioning

confidence: 99%

Assessment of groundwater quality of Lakshimpur district of Bangladesh using water quality indices, geostatistical methods, and multivariate analysis

et al. 2016

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Groundwater evaluation indices, multivariate statistical techniques, and geostatistical models are applied to assess the source apportionment and spatial variability of groundwater pollutants at the Lakshimpur district of Bangladesh. A total of 70 groundwater samples have been collected from wells (shallow to deep wells, i.e., 10-375 m) from the study area. Groundwater quality index reveals that 50 % of the water samples belong to goodquality water. The degrees of contamination, heavy metal pollution index, and heavy metal evaluation index present diversified results in samples even though they show significant correlations among them. The results of principal component analysis (PCA) show that groundwater quality in the study area mainly has geogenic (weathering and geochemical alteration of source rock) sources followed by anthropogenic source (agrogenic, domestic sewage, etc.). Cluster analysis and correlation matrix also supported the results of PCA. The Gaussian semivariogram models have been tested as the best fit models for most of the water quality indices and PCA components. The results of semivariogram models have shown that most of the variables have weak spatial dependence, indicating agricultural and residential/domestic influences. The spatial distribution maps of water quality parameters have provided a useful and robust visual tool for decision makers toward defining adaptive measures. This study is an implication to show the multiple approaches for quality assessment and spatial variability of groundwater as an effort toward a more effective groundwater quality management.

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“…In the past decade, a considerable number of studies have been performed to explain the occurrence of high As groundwater worldwide (He et al, 2010;Nicolli et al, 2010;Postma et al, 2010Postma et al, , 2007Reza et al, 2010b;van Geen et al, 2006;Zheng et al, 2004), and many hypotheses have been proposed to explain the mechanism of As enrichment in groundwater (van Geen et al, 2006;Zheng et al, 2004;Postma et al, 2010;Lowers et al, 2007). However, the mechanism of As mobilization and enrichment in groundwater is still a matter of intense debate.…”

Section: Introductionmentioning

confidence: 99%

Effect of irrigation on Fe(III)–SO42− redox cycling and arsenic mobilization in shallow groundwater from the Datong basin, China: Evidence from hydrochemical monitoring and modeling

Xie

Wang

et al. 2015

Journal of Hydrology

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Implications of organic matter on arsenic mobilization into groundwater: Evidence from northwestern (Chapai-Nawabganj), central (Manikganj) and southeastern (Chandpur) Bangladesh

Cited by 74 publications

References 30 publications

Interrelationship of TOC, As, Fe, Mn, Al and Si in shallow alluvial aquifers in Chapai-Nawabganj, Northwestern Bangladesh: implication for potential source of organic carbon

Interrelationship of TOC, As, Fe, Mn, Al and Si in shallow alluvial aquifers in Chapai-Nawabganj, Northwestern Bangladesh: implication for potential source of organic carbon

Assessment of groundwater quality of Lakshimpur district of Bangladesh using water quality indices, geostatistical methods, and multivariate analysis

Effect of irrigation on Fe(III)–SO42− redox cycling and arsenic mobilization in shallow groundwater from the Datong basin, China: Evidence from hydrochemical monitoring and modeling

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