中文关键词土壤-作物系统土壤重金属污染风险累积效应雄安新区 英文关键词soil-crop systemsoil heavy metalspollution riskcumulative effectXiong'an New District

作者	单位	E-mail
周亚龙	中国地质科学院地球物理地球化学勘查研究所, 廊坊 065000 中国地质科学院地球表层碳-汞地球化学循环重点实验室, 廊坊 065000 中国地质调查局土地质量地球化学调查评价研究中心, 廊坊 065000	zyalong@mail.cgs.gov.cn
王乔林	中国地质科学院地球物理地球化学勘查研究所, 廊坊 065000 中国地质科学院地球表层碳-汞地球化学循环重点实验室, 廊坊 065000 中国地质调查局土地质量地球化学调查评价研究中心, 廊坊 065000
王成文	中国地质科学院地球物理地球化学勘查研究所, 廊坊 065000 中国地质科学院地球表层碳-汞地球化学循环重点实验室, 廊坊 065000 中国地质调查局土地质量地球化学调查评价研究中心, 廊坊 065000	wchengwen@mail.cgs.gov.cn
刘飞	中国地质科学院地球物理地球化学勘查研究所, 廊坊 065000 中国地质科学院地球表层碳-汞地球化学循环重点实验室, 廊坊 065000 中国地质调查局土地质量地球化学调查评价研究中心, 廊坊 065000
宋云涛	中国地质科学院地球物理地球化学勘查研究所, 廊坊 065000 中国地质科学院地球表层碳-汞地球化学循环重点实验室, 廊坊 065000 中国地质调查局土地质量地球化学调查评价研究中心, 廊坊 065000
郭志娟	中国地质科学院地球物理地球化学勘查研究所, 廊坊 065000 中国地质科学院地球表层碳-汞地球化学循环重点实验室, 廊坊 065000 中国地质调查局土地质量地球化学调查评价研究中心, 廊坊 065000
杨志斌	中国地质科学院地球物理地球化学勘查研究所, 廊坊 065000	yzhibin@mail.cgs.gov.cn

中文摘要 为评估雄安新区企业密集区工业生产经营活动对其周边农田土壤和农作物中重金属污染风险的影响程度，系统分析企业周边农田区小麦籽实及其根系土壤重金属含量特征与超标情况，利用地累积指数（Igeo）和潜在生态风险指数（RI），采用主成分分析和相关分析等统计方法开展重金属污染风险评估和源解析.结果表明，根系土壤96.67%的样品存在1种以上重金属含量超出农用地土壤污染风险筛选值（GB 15618-2018），小麦籽实96.67%的样品Pb含量和16.67%的样品Cd含量超出食品安全国家标准（GB 2762-2017）.根系土壤Cd和Pb污染相对严重，Igeo呈中~重污染以上等级状态的样品数占比分别为83.33%和53.33%，Cu、Hg和Zn处于轻污染和中污染状态的样品数占比90%以上，As和Ni呈现轻污染状态，Cr处于无污染状态.根系土壤样品RI介于212.69~1022.69之间，73.33%的样品RI为强生态风险等级，Cd潜在生态危害最大，其次为Hg和Pb元素.土壤重金属Cd、Zn和Cu的富集主要受周边企业生产活动的影响，As、Hg和Pb除受企业生产活动因素影响外，还可能受汽车尾气、燃煤等人为源影响，Cr和Ni主要受自然地质背景因素影响.企业周边农田土壤-农作物系统重金属元素的累积与其距离企业距离（H）均呈负相关关系，距离企业越近，周边土壤-农作物系统重金属元素累积效应越显著. 英文摘要 In order to evaluate the influence of heavy metal pollution risk in a surrounding soil-crop system caused by industrial activities in enterprise-intensive areas and to analyze the characteristics of heavy metal content and excessive levels in wheat seed and root soil in farmland areas around the enterprise in Xiong'an new district, the geoaccumulation index (Igeo), potential ecological risk index (RI), principal component analysis, and correlation analysis were used to assess the pollution risk and source resolution. The results showed that 96.67% of the root soil samples had more than one kind of heavy metal present beyond the screening value of soil pollution risk to agricultural land (GB 15618-2018), whereas the content of Pb in 96.67% of wheat seed samples and Cd in 16.67% of wheat seeds exceeded the national food safety standards (GB 2762-2017). The pollution of Cd and Pb in root soil was relatively severe. The proportion of samples with medium to heavy pollution was 83.33% and 53.33%, respectively. The samples of Cu, Hg, and Zn in a light-and medium-polluted state accounted for more than 90%, whereas As and Ni showed a light-pollution state, and there was no Cr pollution present. The RI of root soil samples ranged from 212.69 to 1022.69, and the RI in 73.33% samples was graded as a strong ecological risk. Cd had the greatest potential ecological harm, followed by Hg and Pb. The enrichment of Cd, Zn, and Cu in the soil was mainly affected by the production activities of surrounding enterprises, whereas As, Hg, and Pb were not only affected by the above factors but also might be affected by human sources, such as automobile exhaust and coal burning. Cr and Ni were mainly affected by natural geological background factors. The accumulation of heavy metal elements in the soil-crop system had a negative correlation with the distance from the enterprise (H), and the closer to the enterprise, the more significant the accumulation effect of the heavy metal elements in the surrounding soil-crop system.

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