Solid speciation and mobility of potentially toxic elements from natural and contaminated soils: A combined approach
Solid speciation and mobility of potentially toxic elements from natural and contaminated soils: A combined approach
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天然土壤和受污染土壤中潜在有毒元素的固体形态和流动性： 综合方法
DOI：
10.1016/j.chemosphere.2008.06.015
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发表时间：
2008-10-01
期刊：
影响因子：
8.8
通讯作者：
Puziewicz, J.
中科院分区：
文献类型：
--
作者：
Kierczak, J.;Neel, C.;Puziewicz, J.
研究区域（Szklary Massif，SW波兰）包括三个不同土壤来源的地点：（1）天然蛇纹岩形成土，（2）位于垃圾场的风化土和（3）在垃圾场旁边的冰碛上发育的耕作的始土。潜在有毒元素（PTE）在这些网站的岩石或人为的起源。钴，铬，铜，镍，铅和锌之间的固体形式的化学分配，通过连续提取加上直接矿物鉴定（SEM，电子探针分析- EMPA，和XRD）。对几个提取步骤后的固体残留物进行了检查，以讨论通过提取方法获得的间接形态。人为来源的PTE总浓度大大超过了岩石成因的。研究PTE的流动性是可变的，在不同的环境中，除了铬，这总是大多数被发现在残留馏分的提取。Cu和Pb在土壤中的移动的量大于Cr和Co。Zn在蛇纹土和耕作表层中的稳定性（Cu > Pb > Ni > Co > Zn > Cr）大于在红壤中的稳定性（Zn > Cu >= Pb > Ni > Co > Cr）。岩石成因的PTE一般比那些从人为来源的移动的，除了镍是更多的移动的在蛇纹岩土壤。然而，金属的矿物形态比金属来源更能决定其流动性。通过直接方法鉴定的PTE矿物形式是不可能的金属存在于低浓度（铜，铅）。然而，几个提取步骤的固体残留物的直接矿物学检查，提高了评估的PTE固体形态和流动性，特别是铬，镍和锌。(c)2008爱思唯尔有限公司保留所有权利。
The study area (Szklary Massif, SW Poland) comprises three sites of different soil provenance: (1) natural serpentine Cambisol, (2) anthroposol situated on waste dump and (3) cultivated Inceptisol developed on glacial tills next to the dump. Potentially toxic elements (PTE) have either lithogenic or anthropogenic origins in these sites. The chemical partitioning of Co, Cr, Cu, Ni, Pb and Zn among solid forms was determined by sequential extractions coupled with direct mineral identifications (SEM, electron microprobe analysis - EMPA, and XRD). Examination of solid residues after several extraction steps was conducted in order to discuss the indirect speciation obtained by the extraction method. Total concentrations of PTE having anthropogenic origin greatly exceed those of lithogenic origin. Mobility of studied PTE is variable in the different environments except for Cr which is always mostly found in residual fractions of extractions. Cu and Pb are more mobile than Cr and Co in all soils. Zn is more stable (Cu > Pb > Ni > Co > Zn > Cr) in the serpentine soil and cultivated epipedon (Pb > Cu > Zn > Ni > Co >> Cr) than in the anthroposol (Zn > Cu >= Pb > Ni > Co > Cr). PTE of lithogenic origin are generally less mobile than those from anthropogenic origin except Ni which is more mobile in the serpentine soil. Nonetheless, mineral forms of metals better determine their mobility than metal origin. Identification by direct methods of the PTE mineral form was not possible for metals present at low concentrations (Cu, Pb). However, direct mineralogical examinations of the solid residues of several extractions steps improved the assessment of the PTE solid speciation and mobility, particularly for Cr, Ni and Zn. (c) 2008 Elsevier Ltd. All rights reserved.