Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
577141 | Journal of Hazardous Materials | 2013 | 17 Pages |
Abstract
Sediment samples from two soil profiles and a river bed along with fourteen rock samples were also collected and analysed. Sequential extractions of the sediments together with the calculation of the mineral saturation indices indicate that iron oxides and hydroxides are the important secondary minerals phases which are important adsorbents for As. High pH values, and the competition of As with HCO3 and dissolved silica for the adsorption sites probably seems to be an important process for the mobilisation of As in the shallow groundwaters of the region. Continuous monitoring and expansion of monitoring systems are necessary prerequisites for better understanding of the pattern of As mobilisation in the Southern Poopó Basin.
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Authors
Mauricio Ormachea Muñoz, Hannes Wern, Fredrick Johnsson, Prosun Bhattacharya, Ondra Sracek, Roger Thunvik, Jorge Quintanilla, Jochen Bundschuh,