Elemental profile of abiotic components of the East Calcutta Wetlands, a Ramsar site in India

Chatterjee, S.; Chattopadhyay, Buddhadeb; Mukhopadhyay, Sajal

doi:10.2462/09670513.901

Cited by 2 publications

(1 citation statement)

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“…Furthermore, presence of varied numbers of pollutants including heavy metals in the water through natural and/or anthropogenic interventions imparts toxic and harmful effects to the environment and the individual (Chatterjee et al 2008;Vaclavikova et al 2008). Among the pollutants, arsenic is considered a high-priority toxic metal because it acts as a human carcinogen (Jie and Waalkes 2008;Das et al 2009;Henke 2009).…”

Section: Introductionmentioning

confidence: 99%

Groundwater arsenic contamination in Brahmaputra river basin: a water quality assessment in Golaghat (Assam), India

Chetia

Chatterjee

Banerjee

et al. 2010

Environ Monit Assess

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Distribution of arsenic (As) and its compound and related toxicology are serious concerns nowadays. Millions of individuals worldwide are suffering from arsenic toxic effect due to drinking of As-contaminated groundwater. The Bengal delta plain, which is formed by the Ganga-Padma-Meghna-Brahmaputra river basin, covering several districts of West Bengal, India, and Bangladesh is considered as the worst As-affected alluvial basin. The present study was carried out to examine As contamination in the state of Assam, an adjoining region of the West Bengal and Bangladesh borders. Two hundred twenty-two groundwater samples were collected from shallow and deep tubewells of six blocks of Golaghat district (Assam). Along with total As, examination of concentration levels of other key parameters, viz., Fe, Mn, Ca, Na, K, and Mg with pH, total hardness, and SO[Formula: see text], was also carried out. In respect to the permissible limit formulated by the World Health Organization (WHO; As 0.01 ppm, Fe 1.0 ppm, and Mn 0.3 ppm for potable water), the present study showed that out of the 222 groundwater samples, 67%, 76.4%, and 28.5% were found contaminated with higher metal contents (for total As, Fe, and Mn, respectively). The most badly affected area was the Gamariguri block, where 100% of the samples had As and Fe concentrations above the WHO drinking water guideline values. In this block, the highest As and Fe concentrations were recorded 0.128 and 5.9 ppm, respectively. Tubewell water of depth 180±10 ft found to be more contaminated by As and Fe with 78% and 83% of the samples were tainted with higher concentration of such toxic metals, respectively. A strong significant correlation was observed between As and Fe (0.697 at p<0.01), suggesting a possible reductive dissolution of As-Fe-bearing minerals for the mobilization of As in the groundwater of the region.

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Section: Introductionmentioning

confidence: 99%