江苏某材料厂周边农田土壤钼污染特征及农作物健康风险评价  

Characteristics of soil molybdenum contamination and crop health risk assessment around a material factory in Jiangsu Province

作　　者：范健 黄顺生[1,2] 崔晓丹 张平[1,2] 冯文立 籍荣生[3] 何培良 Fan Jian;Huang Shunsheng;Cui Xiaodan;Zhang Ping;Feng Wenli;Ji Rongsheng;He Peiliang(Technology Innovation Center for Ecological Monitoring&Restoration Project on Land(arable),Ministry of Natural Resources,Nanjing 210018,Jiangsu,China;Geological Survey of Jiangsu Province,Nanjing 210018,Jiangsu,China;Huai′an Natural Resources and Planning Bureau,Huai′an 223005,Jiangsu,China;Hebei Geological Engineering Exploration Institute,Baoding 071051,Hebei,China)

机构地区：[1]自然资源部国土(耕地)生态监测与修复工程技术创新中心,江苏南京210018 [2]江苏省地质调查研究院,江苏南京210018 [3]淮安市自然资源和规划局,江苏淮安223005 [4]河北省地质工程勘查院,河北保定071051

出　　处：《地质学刊》2023年第1期84-90,共7页Journal of Geology

基　　金：江苏省地质勘查专项资金项目“江淮生态经济区核心地带(淮安)地质调查”(苏财建[2018]96号);江苏省省级耕地污染防治项目“典型污染耕地生态修复及安全利用示范”(苏财建[2017]123号)。

摘　　要：为了解江苏某材料厂金属冶炼活动引发的重金属污染风险,采集周围农田土壤、小麦和水稻籽实样品,确定Mo含量及其在土壤中的形态,采用地质累积指数和富集因子指标评价土壤中钼的污染风险,采用健康风险指数评价小麦、稻米中Mo的健康风险。结果表明,农田土壤中Mo含量在0.50~63.2 mg/kg之间,其平均值5.70 mg/kg远高于全省平均值0.65 mg/kg,表层土壤出现了中度—高度富集,近70%的样点受到不同程度的钼污染,污染范围距该厂300 m,污染深度>1.5 m。土壤中的Mo具有较高的生物有效性,在小麦、水稻籽实中显著富集,主要与土壤具有较高的全Mo含量以及土壤呈碱性有关。基于EPA的健康风险评估方法,食用当地稻米、小麦会产生较大的健康风险。To reveal the risk of heavy metal pollution caused by metal smelting in a material factory in Jiangsu Province,samples of soil,wheat and rice grains were collected to determine the content of molybdenum and its form in soil.Geo-accumulation index and enrichment factors were used to evaluate the pollution risk of soil molybdenum,and health risk index was used to evaluate the health risk of molybdenum in wheat and rice.The results showed that the content of molybdenum in farmland soil ranged from 0.50 to 63.2 mg/kg,with an average of 5.70 mg/kg far higher than the provincial average of 0.65 mg/kg.The surface soil showed moderate to high enrichment,with nearly 70% of the sample sites contaminated with molybdenum in different degrees.The pollution range was 300 m away from the material factory,and the pollution depth was more than 1.5 m.Molybdenum in soil has high bioavailability and is significantly enriched in wheat and rice grains,which is mainly related to the high content of total molybdenum in soil and the alkalinity of soil.Based on the EPA′s health risk assessment method,eating local rice and wheat poses a significant health risk.

关 键 词：钼污染 风险评价 土壤 农作物 材料厂 

分 类 号：P595[天文地球—地球化学] X825[天文地球—地质学]