Thallium in fractions of soil formed on floodplain terraces
Thallium in fractions of soil formed on floodplain terraces
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DOI：
10.1016/j.chemosphere.2006.07.098
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发表时间：
2007-01-01
期刊：
影响因子：
8.8
通讯作者：
Lukaszewski, Zenon
中科院分区：
文献类型：
--
作者：
Jakubowska, Monika;Pasieczna, Anna;Lukaszewski, Zenon
两种土壤形成的河漫滩阶地流经的河流与铊污染的锌铅矿石勘探区和一个土壤从河漫滩阶地的参考区进行了调查的土壤组分之间的铊分布。这种类型的土壤形成于主河道旁边的河漫滩阶地上，其成分记录了河流污染的历史。根据BCR方案进行土壤的连续提取，并额外进行水提取的初始阶段。用流动注射微分脉冲阳极溶出伏安法测定了三种样品中的铊，发现三种样品中的铊都是以母体中的铊为主。从污染区的表层土壤中含有49.3%的铊截留在残留的母质，底层土壤中含有41%，而参考土壤中含有80%的这一部分。活性铊主要存在于可还原态中（表层土27.7%，底层土27%，参比土12.4%）。第二个重要性是可氧化铊的分数。表层土壤中铊含量占总铊含量的12%，底层土壤中铊含量占总铊含量的19%，而参比土壤中铊含量占总铊含量的4.1%。铊的酸溶/可交换部分与可氧化部分具有几乎相同的意义。表层土壤占总浓度的10.4%，而底层土壤占总浓度的12%。水溶性铊浓度很小。通过对表层和底层土壤的比较，发现铊在很长一段时间内没有从河道迁移到河漫滩阶地上。(c)2006爱思唯尔有限公司保留所有权利。
Two soils formed on the floodplain terrace of a rivulet flowing through the zinc-lead ore exploration area polluted with thallium and one soil from a floodplain terrace of the reference area were investigated in terms of thallium distribution between soil fractions. Such type of soil is formed on river floodplain terraces next to the main river channel and its composition records the history of river pollution. A sequential extraction of soil according to the BCR protocol was performed with an additional initial stage of extraction with water. Apart from labile thallium, thallium entrapped in the residual parent matter was also determined.Thallium was determined by flow-injection differential-pulse anodic stripping voltammetry.In all three cases, the major fraction is thallium entrapped in parent matter. Top soil from the polluted area contains 49.3% thallium entrapped in the residual parent matter, the bottom soil contains 41% while the reference soil contains 80% in this fraction. The major part of labile thallium is located in the reducible fraction (27.7% of total thallium in the top soil, 27% in the bottom soil and 12.4% of the reference soil). Second in terms of significance is the fraction of oxidizable thallium. The top soil contains 12% of total thallium concentration, the bottom soil contains 19% of total concentration, while the reference soil contains 4.1% of total concentration. The acid soluble/exchangeable fraction of thallium has almost the same significance as the oxidizable fraction. The top soil contains 10.4% of the total concentration, while the bottom soil contains 12% of the total concentration. Water soluble thallium concentration is very small. Comparison of the top and the bottom soil show that thallium has not been transported from the river channel onto the floodplain terrace over a long period. (c) 2006 Elsevier Ltd. All rights reserved.