Arsenic enrichment in groundwater in the middle Gangetic Plain of Ghazipur District in Uttar Pradesh, India

Arsenic Contamination in Groundwater in the Middle Gangetic Plain, India: Its Relations to Fluvial Geomorphology and Quaternary Stratigraphy

“…Moreover, As contamination >50 μg/L has been reported in the Unnao district of UP in the Suklaganj-Kanpur urban areas and Purani Bazar, Misra Colony, Rishi Nagar, Ananda Nagar, Subash Gram, Kanchan Nagar villages. These locations are close to the entrenched (Chakraborti et al 2009 ) and most of them are located within the depth of 30 m. However, the temporal variation of As concentrations in Ghazipur district are greater in the pre-monsoon than that of the post-monsoon season (Ahamed et al 2006 ;Kumar et al 2010a ;Yano et al 2012 ). Lakhimpur Kheri district of UP lies in Terai region along the Himalayan foothills.…”

Arsenic groundwater contamination and its health effects in Patna district (capital of Bihar) in the middle Ganga plain, India

“…We earlier reported that As concentration in hand tube-wells of West Bengal and Bangladesh also shows the same trend . It was reported from the middle Gangetic Plain of India that the highest As concentration and spatial and temporal variability were mostly observed in tubewells at 10e20 m depth with As concentration decreasing at depths below 40 m (Kumar et al, 2010a(Kumar et al, , 2010b. The relationship between As concentrations and depth in tube-wells is presented in Supplementary Information (Fig.…”

“…It was also reported that the ratio of As and FeOOH may vary spatially depending on the chemical characteristics of the aquifer sediments such as mineral abundance and its concentration (Ravenscroft et al, 2001). (Kumar et al, 2010a) found a poor relationship between As and Fe in groundwater based on a study from the middle Gangetic Plain of Gazipur district in Uttar Pradesh, India suggesting that several processes including mineral weathering, oxygen consumption and nitrate reduction may be influencing the As release into the groundwater. Contrary, (Saha, 2009) found strong positive correlation (r 2 ¼ 0.674) between As and Fe in groundwater from the affected areas of Sone-Ganga Interfluve and it was suggested that biomass accumulated in the season water bodies is the source of organic carbon in groundwater which appears to trigger reductive dissolution of FeOOH present in the deposits, releasing both As and Fe in the groundwater.…”

“…Several articles have already been published on the various aspects of groundwater As contamination in the Bihar state, India including the extent and magnitude of contamination, human health effects from As toxicity, source and mechanism of contamination, contamination of As in food chain etc. (Ghosh et al, 2009;Kumar et al, 2010aKumar et al, , 2010bSingh, 2011;Ghosh, 2011, 2012;Singh et al, 2014;Singh, 2015;Singh and Vedwan, 2015;Chakraborti et al, 2016;Kumar et al, 2016). It was reported that 50 blocks in 11 districts of Bihar are As-affected based on the field testing kit results supported by UNICEF (Nickson et al, 2007).…”

Geochemistry and mobilization of arsenic in Shuklaganj area of Kanpur–Unnao district, Uttar Pradesh, India

“…In the state of Uttar Pradesh, India, few investigations have been carried out on the distribution of arsenic contamination (Nickson et al 2007;Chauhan et al 2009;Chakraborti et al 2009;Kumar et al 2010). However, the mechanism of release of arsenic in Kanpur district is still unexplored.…”