Arsenic mobility in contaminated lake sediments

被引:68
|
作者
Nikolaidis, NP [1 ]
Dobbs, GM
Chen, J
Lackovic, JA
机构
[1] Tech Univ Crete, Dept Environm Engn, Khania 73100, Greece
[2] United Technol Corp, United Technol Res Ctr, E Hartford, CT 06108 USA
[3] Univ Connecticut, Environm Res Inst, Storrs, CT 06269 USA
关键词
arsenic; mobility; landfill; lake sediments; modelling;
D O I
10.1016/j.envpol.2003.11.005
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
An arsenic contaminated lake sediment near a landfill in Maine was used to characterize the geochemistry of arsenic and assess the influence of environmental conditions oil its mobility. A kinetic model was developed to simulate the leaching ability of arsenic in lake sediments tinder different environmental conditions. The HM1D chemical transport model was used to model the column experiments and determine the rates of arsenic mobility from the sediment. Laboratory studies provided the information to construct a conceptual model to demonstrate the mobility of arsenic in the lake sediment. The leaching ability of arsenic in lake sediments greatly depends on the flow conditions of ground water and the geochemistry of the sediments. Large amounts of arsenic were tightly bound to the sediments. The amount of arsenic leaching out of the sediment to the water column was substantially decreased due to iron/arsenic co-precipitation at the water-sediment interface. Overall, it was found that arsenic greatly accumulated Lit the ground water/lake interface and it formed insoluble precipitates. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:479 / 487
页数:9
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