Yang Hailin, He Mengchang, Wang Xiangqin
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, People's Republic of China.
Environ Geochem Health. 2015 Feb;37(1):21-33. doi: 10.1007/s10653-014-9627-2. Epub 2014 Jun 27.
Mining and smelting activities contribute large amounts of heavy metal pollution to the environment. In this study, four 75- or 80-cm-deep soil profiles in the vicinity of the Xikuangshan Sb smelter were sampled and studied by combination of bulk chemical analysis, sequential extraction procedure, and speciation analysis of Sb and As, which are in order to assess the vertical mobility of metal/metalloid contaminants (Sb, As, Cd, and Hg). The heavy contamination in the soil profiles is mostly located in the uppermost soil layers enriched in organic matter (<40 cm) and exhibited downward migration in the soil profiles. Sb and As, being substantially bound in the exchangeable fractions by sequential extraction studies, showed significant mobility in the profiles. Sb(III), Sb(V), As(III), and As(V) were found in all of the soil samples, and certain methylated states of Sb (TMSb) and As (MMA, DMA) were also present in the lower layer soil samples.
采矿和冶炼活动给环境造成了大量重金属污染。在本研究中，对锡矿山锑冶炼厂附近四个深度为75或80厘米的土壤剖面进行了采样，并通过批量化学分析、连续提取程序以及锑和砷的形态分析相结合的方法进行研究，目的是评估金属/类金属污染物（锑、砷、镉和汞）的垂直迁移性。土壤剖面中的重度污染大多位于富含有机质的最上层土壤（<40厘米）中，并在土壤剖面中呈现向下迁移的趋势。通过连续提取研究发现，锑和砷主要以可交换态存在，在剖面中表现出显著的迁移性。在所有土壤样品中均检测到了Sb(III)、Sb(V)、As(III)和As(V)，并且在下层土壤样品中还存在一定的锑（TMSb）和砷（MMA、DMA）甲基化形态。
