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典型地区农用地污染调查及风险管控标准探讨
Investigation of Agricultural Land Pollution in Typical Areas and Discussion on Risk Control Standards
投稿时间:2018-11-09  修订日期:2019-03-14
DOI:10.19316/j.issn.1002-6002.2019.03.01
中文关键词:  农用地  土壤重金属  有效态  稻米中重金属  风险评价
英文关键词:agricultural land  heavy metal in soil  available contents  heavy metal in rice  risk evaluation
基金项目:2016年国家重点研发计划项目(2016YFC0500205)子课题:生态质量综合评价与生态保护绩效考核方法研究
作者单位
于洋 中国科学院, 合肥物质科学研究院安徽光机所, 安徽 合肥230031
中国科学技术大学, 安徽 合肥230026
中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京100012 
刘文清 中国科学院, 合肥物质科学研究院安徽光机所, 安徽 合肥230031
中国科学技术大学, 安徽 合肥230026 
许人骥 中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京100012 
张霖琳 中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京100012 
孙聪 中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京100012 
魏复盛 中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京100012 
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中文摘要:
      针对《土壤污染风险管控标准——农用地土壤污染风险管控标准》(GB 15618—2018),提出以土壤中全量浓度筛选值和管控值作为衡量农用地土壤污染风险管控的标准,对湖南省部分稻田农用地土壤及点对点稻米样品中镉、铅、砷、汞的总量和有效态浓度及稻米中含量进行监测,根据重金属总量浓度分为低风险、中风险、高风险3组。结果显示:①土壤及稻米中镉含量基本为随着风险级别的升高而增加,铅、砷在土壤和稻米中含量无规律性结果,汞监测结果均为未检出。②低风险组稻米镉超标率为12.0%,高风险组稻米镉达标率为33.3%,表明利用总量浓度对农用地土壤潜在风险进行分组存在一定的局限性。③依据4种重金属在土壤中总量及稻米(早稻)中含量情况,对风险级别进行调整并综合判断:有58个样品为低风险组,占样品总数的68.2%,超标率为零;有15个样品为中风险组,占样品总数的17.7%,超标率为80.0%;有12个样品为高风险组,占样品总数的14.1%,超标率为100.0%。调整后评价结果与上述标准的划分目标更接近,能够提高上述标准的准确性和实用性。
英文摘要:
      In view of "Standard for Risk Control of Soil Pollution-Standard for Risk Control of Agricultural Soil Pollution" (GB 15618—2018), the screening value and control value of total soil concent were proposed as criteria for risk control of agricultural soil pollution. The total content,available content of Cd, Pb, As, Hg in some paddy soil and point-to-point rice samples in Hunan Province were determined. According to the total concent of heavy metals, they were divided into three groups:low risk, medium risk and high risk. The results showed that:①Cd concent in soil and rice increased with the increase of risk level; there were no regular results of Pb and As;Hg contents in soil and rice were undetected. ②The over-standard rate of rice Cd in low-risk group was 12.0%. The rate of rice reaching the standard in high-risk group was 33.3%. This indicated that there were some limitations in grouping potential risks of agricultural soil using total concent. ③According to the total amount of four heavy metals in soil and the content in rice (early rice), the risk level was adjusted and judged. The results were as follows:there were 58 samples in low-risk group, accounting for 68.2% of the total samples, and the rate of exceeding the standard was 0; 15 samples in medium-risk group, accounting for 17.7% of the total samples, and the rate of exceeding the standard was 80.0%; 12 samples in high-risk group, accounting for 14.1% of the total samples, and the rate of exceeding the standard was 100.0%. The evaluation results were closer to the target of the standard, which can improve the accuracy and practicability of the standard.
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