Hydrogeochemical characteristics and its role in controlling arsenic mobilization in a shallow aquifer

作     者：Ayan Das Abhijit Mandal Ayan Das;Abhijit Mandal

作者机构：Department of ChemistryUniversity of KalyaniKalyaniWest BengalIndia Department of General Science and HumanitiesGKCIETMaldaWest BengalIndia 

出 版 物：《Acta Geochimica》 (地球化学学报（英文）)

年 卷 期：2021年第40卷第6期

页      面：912-925页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：The authors want to thank the sampling team for their hard work and the local villagers for their hospitality during the field campaign 

主　　题：Arsenic mobilization Groundwater hydrogeochemistry Aquifer sediments Shallow aquifers Redox environment 

摘      要：The relevance of groundwater hydrogeochemistry to explain the occurrence and distribution of arsenic in groundwater is of great *** insightful discussions on the control of shallow groundwater(50 m)hydrogeochemistry in arsenic mobilization are known to be a viable tool to explain the arsenic menace in shallow *** present investigation emphasizes the hydrogeochemical driver and/or control over the reductive dissolution of Fe-bearing host minerals and thereby releasing arsenic into the shallow groundwater of the study *** study suggests that hydrogeochemical evolution is mainly governed by carbonate minerals dissolution,silicate weathering,and competitive ion-exchange processes in the shallow aquifers(50 m).The present study also indicates the prevalence of carbonate minerals dissolution over silicate *** emergence of Cl^(-)concentration in the shallow groundwater founds the possibilities of anthropogenic inputs into the shallow aquifers(50 m).The reducing environment in shallow aquifers(50 m)of the study area is evident in the reductive dissolution of Febearing shallow aquifer minerals which absorb arsenic in the solid phase and mobilize arsenic onto shallow *** study opted for many statistical approaches to delineate the correlation among major and minor ionic constituents of the groundwater which are very helpful to understand the comprehensive mechanism of arsenic mobilization into shallow groundwater.