Arsenic contamination of groundwater resources threatens the health of millions of people worldwide, particularly in the densely populated river deltas of Southeast Asia. Although many arsenic-affected areas have been identified in recent years, a systematic evaluation of vulnerable areas remains to be carried out. Here we present maps pinpointing areas at risk of groundwater arsenic concentrations exceeding 10 μg l−1. These maps were produced by combining geological and surface soil parameters in a logistic regression model, calibrated with 1,756 aggregated and geo-referenced groundwater data points from the Bengal, Red River and Mekong deltas. We show that Holocene deltaic and organic-rich surface sediments are key indicators for arsenic risk areas and that the combination of surface parameters is a successful approach to predict groundwater arsenic contamination. Predictions are in good agreement with the known spatial distribution of arsenic contamination, and further indicate elevated risks in Sumatra and Myanmar, where no groundwater studies exist. Arsenic contamination of groundwater resources threatens the health of millions of people worldwide, particularly in the densely populated river deltas of Southeast Asia. Maps of areas at risk of groundwater arsenic concentrations have been produced by combining geological and surface-soil parameters in a logistic regression model. They show that Holocene deltaic and organic-rich surface sediments are key indicators for arsenic risk areas and indicate elevated risks in Sumatra and Myanmar where no groundwater studies exist.

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Predicting groundwater arsenic contamination in Southeast Asia from surface parameters

Sorption of As(III) and As(V) to siderite, green rust (fougerite) and magnetite: Implications for arsenic release in anoxic groundwaters

Origin, structure, and biological activities of peroxidases in human saliva

Raman spectroscopy as a tool to determine the thermal maturity of organic matter: Application to sedimentary, metamorphic and structural geology

Arsenic mobilization in shallow aquifers of Datong Basin: Hydrochemical and mineralogical evidences

Arsenic pollution in groundwater of west bengal, india - an insight into the problem by subsurface sediment analysis

The metallurgical properties and the microstructure of coke after gasification reaction with pure H2O and pure CO2 were investigated in this study. Moreover, the first principles calculation was conducted to study the reaction process of the carbon with pure H2O and pure CO2. The results show that the CRI (coke reaction index) increases sharply and the CSR (coke strength after reaction) decreases sharply, when the cokes are gasified with H2O as compared to CO2. The scanning electronic microscopy (SEM) images and the coke panoramagrams show that H2O more easily leads to the generation of large pore (>500μm) and destroys the coke structure than CO2. The X-ray diffraction (XRD) results indicate that the arrangement of carbon atoms of coke becomes regular and the ordered degree of coke increases after reaction with CO2 and H2O; however, after being gasified with H2O, the cokes have a higher ordered degree than with CO2. The results of the first principles calculation show that the H2O molecule is more likely ...

Gasification Reactivity and Structure Evolution of Metallurgical Coke under H2O/CO2 Atmosphere

Assessing the quality of metallurgical coke by Raman spectroscopy

The effect of alkali on the reaction kinetics and strength of blast furnace coke

https://iopscience.iop.org/article/10.1016/S1468-6996(01)00120-6/pdf

Anrin Bhattacharyya

Papers

Arsenic pollution in groundwater of west bengal, india - an insight into the problem by subsurface sediment analysis

Gasification Reactivity and Structure Evolution of Metallurgical Coke under H2O/CO2 Atmosphere

Assessing the quality of metallurgical coke by Raman spectroscopy

The effect of alkali on the reaction kinetics and strength of blast furnace coke

Preparation of alumina–silica–nickel nanocomposite by in situ reduction through sol–gel route