Evaluation and source analysis of heavy metal pollution in the soil around typical metal smelting and mining enterprises in Hunan Province

IF 2 4区环境科学与生态学 Q3 CHEMISTRY, ANALYTICAL

Environmental Chemistry Pub Date : 2021-01-01 DOI:10.7524/J.ISSN.0254-6108.2021010901

D. Chen, Lucas Tan, Zimeng Nie, Zixue Wan, Qian Shu, Haijun Yang

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引用次数: 3

Abstract

In order to understand the current situation of heavy metal pollution in soil around typical metal smelting and mining industry in Hunan Province, 30 enterprises in the metal smelting and mining industry were selected as the research objects in this study, single factor pollution index, Nemeiro pollution index, potential ecological risk index and “Agricultural Land Soil Pollution Risk Control Standards” (GB15618-2018) were used to comprehensively evaluate the polution status of the soil cadmium (Cd), mercury (Hg), arsenic (As), lead (Pb), chromium (Cr), copper (Cu), nickel (Ni), zinc (Zn), and the main components method and the correlation method are also used to explore the sources of heavy metal pollution. The results showed that: The average values of Cd, Hg, As, Cu, Pb, Cr, Zn, and Ni in the samples in the contaminated area were 3.22, 0.985, 65.63, 67.43, 165.53, 94.07, 328, 43.9 mg·kg−1, it is 2.01, 3.66, 1.89, 1.98, 1.98, 1.14, 1.58, 1.39 times of the mean value of the corresponding heavy metal elements in the control point samples; The single factor pollution index (Pi) of heavy metals is Cd>As>Pb>Zn>Cu>Ni>Cr>Hg in dry land, Cd>Hg>Pb>As>Zn>Ni>Cu>Cr in paddy fields, Cd>Zn>As>Pb>Cu>Cr>Ni>Hg in wild grassland, and the order of the heavy metal Pi in woodland is the same as that of dry land. Results of Nemeiro Comprehensive Pollution Index show that the proportion of heavy metal pollution in paddy field, dry land, wasteland and woodland is 44.4%, 48.1%, 52.4%, and 31.6% respectively. The comprehensive evaluation results of the potential ecological risk index showed that the risk levels of dryland, paddy field, wasteland and forestland were 83.3%, 74%, 71.4% and 47.4% in intensity or above. The results of the risk control standard evaluation of agricultural land found that among the 93 soil samples in the contaminated areas, the proportion of samples in the priority protection category, safe use category and strict control category was 10.8%, 50.5% and 38.7% respectively. The results of source analysis showed that Cd, As, Pb, Zn, Cu in the contaminated soil may be influenced by agricultural activities, industrial activities and transportation, Cr may come from the control of the parent material of the soil, and Hg and Ni may be affected by industrial activities. The results show that the pollution control of heavy metals in the soil around the typical metal smelting and mining industry in Hunan Province should focus on strengthening the control and treatment of pollution sources of Cd, Hg, As, Pb and Zn.

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湖南省典型金属冶炼矿山企业周边土壤重金属污染评价及来源分析

为了解湖南省典型金属冶炼采矿业周边土壤重金属污染现状，本研究选取30家金属冶炼采矿业企业作为研究对象，采用单因素污染指数、Nemeiro污染指数、采用潜在生态风险指数和《农用地土壤污染风险控制标准》(GB15618-2018)对土壤镉(Cd)、汞(Hg)、砷(As)、铅(Pb)、铬(Cr)、铜(Cu)、镍(Ni)、锌(Zn)的污染状况进行综合评价，并采用主成分法和相关法对重金属污染源进行探索。结果表明:污染区样品中Cd、Hg、As、Cu、Pb、Cr、Zn、Ni的平均值分别为3.22、0.985、65.63、67.43、165.53、94.07、328、43.9 mg·kg−1，是控制点样品中相应重金属元素平均值的2.01、3.66、1.89、1.98、1.98、1.14、1.58、1.39倍;旱地重金属单因素污染指数(Pi)为Cd>As>Pb>Zn>Cu>Ni>Cr>Hg，水田为Cd>Hg>Pb>As>Zn>Ni>Cu>Cr，野生草地为Cd>Zn>As>Pb>Cu>Cr>Ni>Hg，林地重金属Pi的顺序与旱地相同。Nemeiro综合污染指数结果显示，水田、旱地、荒地和林地重金属污染比例分别为44.4%、48.1%、52.4%和31.6%。潜在生态风险指数综合评价结果显示，旱地、水田、荒地和林地的风险等级分别为83.3%、74%、71.4%和47.4%。农用地风险控制标准评价结果发现，污染区93个土壤样品中，优先保护类、安全使用类和严格控制类样品所占比例分别为10.8%、50.5%和38.7%。来源分析结果表明，污染土壤中的Cd、As、Pb、Zn、Cu可能受到农业活动、工业活动和交通运输的影响，Cr可能来自土壤母质的控制，Hg、Ni可能受到工业活动的影响。结果表明:湖南省典型金属冶炼采矿业周边土壤重金属污染控制应重点加强Cd、Hg、As、Pb、Zn污染源的控制与治理。

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来源期刊

Environmental Chemistry 环境科学-分析化学

CiteScore

4.50

自引率

0.00%

发文量

审稿时长

2.7 months

期刊介绍： Environmental Chemistry publishes manuscripts addressing the chemistry of the environment (air, water, earth, and biota), including the behaviour and impacts of contaminants and other anthropogenic disturbances. The scope encompasses atmospheric chemistry, geochemistry and biogeochemistry, climate change, marine and freshwater chemistry, polar chemistry, fire chemistry, soil and sediment chemistry, and chemical aspects of ecotoxicology. Papers that take an interdisciplinary approach, while advancing our understanding of the linkages between chemistry and physical or biological processes, are particularly encouraged. While focusing on the publication of important original research and timely reviews, the journal also publishes essays and opinion pieces on issues of importance to environmental scientists, such as policy and funding. Papers should be written in a style that is accessible to those outside the field, as the readership will include - in addition to chemists - biologists, toxicologists, soil scientists, and workers from government and industrial institutions. All manuscripts are rigorously peer-reviewed and professionally copy-edited. Environmental Chemistry is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.