| 基于文献计量分析的长江经济带农田土壤重金属污染特征 |
| 摘要点击 1663 全文点击 534 投稿时间：2021-12-30 修订日期：2022-03-08 |
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| 中文关键词 长江经济带 农田土壤 重金属污染 分布特征 影响因素 |
| 英文关键词 Yangtze River Economic Belt farmland soil heavy metal pollution distribution characteristics influencing factors |
| 作者 | 单位 | E-mail | | 刘孝严 | 中国科学院南京土壤研究所土壤环境与污染修复重点实验室, 南京 210008
中国科学院大学, 北京 100049 | liuxiaoyan1@issas.ac.cn | | 樊亚男 | 中国科学院南京土壤研究所土壤环境与污染修复重点实验室, 南京 210008 | | | 刘鹏 | 中国科学院南京土壤研究所土壤环境与污染修复重点实验室, 南京 210008
中国科学院大学, 北京 100049 | | | 吴秋梅 | 中国科学院南京土壤研究所土壤环境与污染修复重点实验室, 南京 210008
中国科学院大学, 北京 100049 | | | 胡文友 | 中国科学院南京土壤研究所土壤环境与污染修复重点实验室, 南京 210008
中国科学院大学, 北京 100049 | wyhu@issas.ac.cn | | 田康 | 中国科学院南京土壤研究所土壤环境与污染修复重点实验室, 南京 210008 | | | 黄标 | 中国科学院南京土壤研究所土壤环境与污染修复重点实验室, 南京 210008
中国科学院大学, 北京 100049 | |
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| 中文摘要 |
| 长江经济带是我国重大战略发展区域之一，理清长江经济带农田土壤重金属污染特征与来源对区域土壤重金属污染防控和农业安全生产具有重要意义.在检索文献数据的基础上，结合空间分析和地累积指数法分析了长江经济带农田土壤重金属（Cd、Cr、Hg、As、Pb、Cu、Zn和Ni）的污染特征、环境风险和主要来源.结果表明：①农田土壤Cd、Cu、Pb、Hg、Zn和As超过农用地土壤污染风险筛选值的比例分别为39.8%、18.5%、8.3%、6.9%、6.9%和6.4%，其中土壤Cd的超标比例最高；②不同区域农田土壤重金属空间分异明显，上游土壤Cr、Cu、Zn和Ni含量高于中游和下游地区，中游土壤Cd、As和Pb含量高于上游和下游地区；③研究区8种重金属的地累积指数分别为：Cd （0.42）>Hg （-0.28）>Pb （-0.32）>Zn （-0.39）>Cu （-0.42）>Cr （-0.7）>As （-0.81）>Ni （-0.73），其中土壤Cd和Hg地累积风险最高；④长江经济带中上游地区农田土壤重金属累积主要受地质高背景和矿山开采等因素影响，中下游地区主要受到快速城镇化、工业生产和高强度农业利用等因素的影响.针对长江经济带农田土壤重金属污染现状及管控需求，建议加强农田土壤重金属的源头防控，根据重金属污染程度、地质背景和农产品质量等进行农田土壤重金属污染的分区分级管控和分类管理，以期实现长江经济带农田土壤环境质量安全和农业绿色可持续生产. |
| 英文摘要 |
| The Yangtze River Economic Belt is one of the major strategic development regions in China. It is of great significance to clarify the characteristics and sources of heavy metal pollution in farmland soil of the Yangtze River Economic Belt for the prevention and control of heavy metal pollution and to ensure safe agricultural production. After collecting extensive literature data, we analyzed the pollution characteristics, environmental risk, and potential sources of heavy metals (Cd, Cr, Hg, As, Pb, Cu, Zn, and Ni) in farmland soil of the Yangtze River Economic Belt through the integrated use of spatial and geo-accumulation index analyses. The results showed that:① the proportion of soil samples exceeding the risk screening values for soil contamination of agricultural land of Cd, Cu, Pb, Hg, Zn, and As were 39.8%, 18.5%, 8.3%, 6.9%, 6.9%, and 6.4%, respectively. Compared with the risk standard, soil Cd had the highest rate of exceeding the standard. ② The contents of Cr, Cu, Zn, and Ni in the upper reaches were higher than those in the middle and lower reaches, and the contents of Cd, As, and Pb in the middle reaches were higher than those in the upper and lower reaches. ③ The results of the geo-accumulation index analysis showed that the contamination degree of the eight heavy metals decreased in the order of Cd(0.42)>Hg(-0.28)>Pb(-0.32)>Zn(-0.39)>Cu(-0.42)>Cr(-0.7)>As(-0.81)>Ni(-0.73), where the accumulation risk of soil Cd and Hg was relatively higher. ④ Higher environmental background and mining activities were the main factors affecting the accumulation of heavy metals in soils in the upper and middle reaches. By contrast, rapid urbanization, industrial production, and intensive agricultural activities were the main factors affecting the heavy metal accumulation in soils in the middle and lower reaches. In view of the current status and control needs of heavy metal pollution in the Yangtze River Economic Belt, it is recommended to strengthen source prevention and control and to also carry out hierarchical control and regional classification management of heavy metal pollution in farmland soils according to the degree of heavy metal pollution, geological background, and quality of agricultural products. The ultimate objective of this research was to archive the farmland soil environmental quality safety and agricultural green sustainable production in the Yangtze River Economic Belt. |
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