[Pollution Characteristics, Risk Assessment, and Source Analysis of Heavy Metals in Soil from a Typical Abandoned Antimony Smelting Factory].

Q2 Environmental Science
Sen Zhang, Ying Cao, Cun-Fu Gao, Tian Meng, Qiang Li
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引用次数: 0

Abstract

Considering the surface soil (0-20 cm) from a typical abandoned antimony smelting factory area in Dachang Town, Qinglong County, Guizhou Province, as a case study, a total of 14 soil samples were systematically collected from both within and outside the smelting factory area. The analysis focused on the pollution status, distribution characteristics, and potential ecological risks of heavy metals such as Sb, As, Cd, Cr, Pb, Cu, Zn, Ni, and V in the soil. Additionally, an evaluation and analysis of pollution sources were conducted. The results showed that the mean concentrations of heavy metals including ω(Sb), ω(As), ω(Cd), ω(Cr), ω(Pb), ω(Cu), ω(Zn), ω(Ni), and ω(V) in the surface soil of the abandoned antimony smelting factory ranged from 4.58 to 15 049.33 mg·kg-1. With the exception of Cr and Ni, all values exceeded the background values of soils in Guizhou province. The single factor pollution indices of Sb and As were 83.61 and 7.01, respectively, indicating severe contamination. In contrast, Pb fell within the non-polluted to slightly polluted range. The comprehensive potential ecological risk of soil heavy metals was characterized by severe potential ecological risk levels for Sb, As, and Cd, while the remaining heavy metals fell within a range of moderate to substantial potential ecological risk levels. The assessment of the geoaccumulation index revealed that the soil in the study area was primarily contaminated by Sb and As, predominantly exhibiting contamination levels ranging from moderate to severe. The results from the RAC method suggested that Sb was the dominant focus for remediation in this abandoned smelting factory. The two primary pollutants, Sb and As, exhibited elevated levels in leachate toxicity, acid-soluble fraction, available fraction, gastric phase, and intestinal phase in terms of bioavailable content, indicating a certain potential hazard. Further, correlation analysis indicated a certain correlation between the total amount of heavy metals and leachate toxicity, available fraction, acid-soluble fraction, reducible fraction, oxidizable fraction, gastric phase extractable fraction, and intestinal phase extractable fraction. The APCS-MLR model indicated that the sources of Sb, As, Zn, Cu, and Cd were primarily industrial, while the sources of Cr and V were mainly natural, and Pb originated mainly from mixed sources.

[典型废弃锑冶炼厂土壤中重金属的污染特征、风险评估和来源分析]。
以贵州省晴隆县大昌镇典型废弃锑冶炼厂区的表层土壤(0-20 cm)为例,系统采集了冶炼厂区内外的 14 个土壤样品。以贵州省晴隆县大昌镇典型废弃锑冶炼厂区为例,在冶炼厂区内外系统采集了14个土壤样品。重点分析了土壤中锑、砷、镉、铬、铅、铜、锌、镍、钒等重金属的污染状况、分布特征和潜在生态风险。此外,还对污染源进行了评估和分析。结果表明,废弃蚂蚁栖息地表层土壤中重金属ω(Sb)、ω(As)、ω(Cd)、ω(Cr)、ω(Pb)、ω(Cu)、ω(Zn)、ω(Ni)和ω(V)的平均浓度分别为0.5%、0.5%、0.5%和0.5%。废弃的锑冶炼厂表层土壤中的ω(Pb)、ω(Cu)、ω(Zn)、ω(Ni)和ω(V)介于 4.58 至 15 049.33 毫克-千克-1 之间。除铬和镍外,其余均超过贵州省土壤背景值。锑和砷的单因子污染指数分别为 83.61 和 7.01,表明污染严重。相比之下,铅则处于未受污染到轻度污染的范围内。土壤重金属潜在生态风险的综合特征是,锑、砷和镉的潜在生态风险水平为重度,其余重金属的潜在生态风险水平在中度到重度之间。地质累积指数评估结果显示,研究区域的土壤主要受到锑和砷的污染,污染程度从中度到重度不等。RAC 方法的结果表明,锑是该废弃冶炼厂的主要修复重点。锑和砷这两种主要污染物在沥滤液毒性、酸溶部分、可利用部分、胃相和肠相的生物可利用含量方面都显示出较高的水平,表明存在一定的潜在危害。此外,相关性分析表明,重金属总量与渗滤液毒性、可利用部分、酸溶部分、可还原部分、可氧化部分、胃相可萃取部分和肠相可萃取部分之间存在一定的相关性。APCS-MLR 模型表明,Sb、As、Zn、Cu 和 Cd 的来源主要是工业,Cr 和 V 的来源主要是自然,Pb 主要来自混合来源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
环境科学
环境科学 Environmental Science-Environmental Science (all)
CiteScore
4.40
自引率
0.00%
发文量
15329
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