南丹矿业活动影响区蔬菜重金属含量及健康风险

发布时间：2018-05-06 05:14

本文选题：矿区 + 重金属　；参考：《生态与农村环境学报》2016年03期

【摘要】：为评估"有色金属之乡"——南丹典型村庄常住居民蔬菜消费中重金属暴露风险,对矿业活动影响区大厂镇、车河镇和长老乡及对照区六寨镇典型村庄蔬菜和菜地土壤重金属含量进行调查。通过连续3 d入户膳食调查获得蔬菜消费量数据,并采集37个菜地土壤样品及166个蔬菜样品,分析其As、Pb、Cd、Cu、Zn和Sb含量,通过污染指数法和重金属摄入量评估暴露接触的人体健康风险。结果表明,不同地区土壤与蔬菜中重金属含量由高到低依次为大厂镇、车河镇、长老乡和六寨镇;矿业影响区蔬菜As、Pb和Cd的超标率分别为5.60%、71.1%和32.3%,对照区蔬菜Pb和Cd的超标率分别为57.1%和37.5%;大厂镇和车河镇成人经蔬菜途径进入人体的As、Pb、Cd、Cu、Zn和Sb含量显著高于六寨镇;4个地区蔬菜As、Pb、Cd和Sb对应的目标危险系数均高于Cu和Zn。风险评价结果表明,大厂镇和车河镇蔬菜As的年健康风险分别为10.64×10-5和10.20×10-5a-1,远高于国际放射防护委员会推荐的标准,表明居住在矿业密集区的居民面临较严重的重金属接触暴露风险,且显著高于对照区。
[Abstract]:In order to assess the exposure risk of heavy metals in vegetable consumption of residents in typical villages of Nandan, "Township of Non-ferrous Metals", Dachang Town, an area affected by mining activities, The contents of heavy metals in vegetable and vegetable soil of typical villages in Chhe Town Changlaoxiang Township and control area were investigated. The data of vegetable consumption were obtained through the household dietary survey for 3 days. 37 vegetable soil samples and 166 vegetable samples were collected to analyze the contents of Cu Zn and SB. The risk of exposure to human health was assessed by pollution index and heavy metal intake. The results showed that the contents of heavy metals in soils and vegetables from high to low were Dachang Town, Chehe Town, Changlaoxiang Town and Liuzhai Town. The excess rates of Ash Pb and CD in vegetables in mining affected areas were 5.600.71% and 32.3wt%, respectively, while those of vegetables in control areas were 57.1% and 37.50.The contents of Cu Zn and SB in adults of Dachang Town and Chehe Town entering human body through vegetable route were significantly higher than those in Liuzhaizhai Town. Compared with Cu and Zn, the target risk coefficients of Pb-CD and SB in vegetables were higher than those in Cu and Zn. The results of risk assessment showed that the annual health risks of as in vegetables in Dachang Town and Chehe Town were 10.64 脳 10 ~ (-5) and 10.20 脳 10 ~ (-5) a ~ (-1) respectively, which was much higher than the standard recommended by the International Commission on Radiological Protection. The results showed that the residents living in the mining area were exposed to heavy metal exposure, which was significantly higher than that in the control area.
【作者单位】：桂林理工大学环境科学与工程学院;桂林理工大学地球科学学院;
【基金】：国家自然科学基金(41161056,41261082) “八桂学者”建设工程专项经费广西自然科学基金(2013GXNSFEA053002)
【分类号】：X53;X56

【参考文献】