广西大厂矿区某屯玉米重金属污染评价

摘要

[目的]对广西大厂矿区某屯玉米重金属污染进行评价.[方法]从广西大厂矿区某屯采集玉米样品及相应的土壤样品各10个,分析了其中的As、Pb、Cd、Zn、Cu等元素的含量,并对玉米安全性进行评价.[结果]该屯10个玉米样品均受到了不同程度的重金属污染,5个样品为重污染,1个样品为中污染,4个样品为轻污染,主要超标元素是Pb和Zn.玉米对土壤中各元素的富集能力是不同的,富集系数排序为:Zn＞ Cu ＞Pb ＞Cd ＞As,说明玉米对砷和镉的富集能力较小.尽管该地区土壤中As、Cd污染很严重,但玉米中超标的主要是Zn和Pb,As和Cd反而不超标.[结论]该研究为今后广西大厂矿区农产品的安全性管理提供了科学参考.%[ Objective] The study aims to assess heavy metal pollution of corn from Daehang mining area in Guangxi. [ Method] 10 corn samples and 10 soil samples were collected from a village in Guangxi Daehang mining area,and pollutants including As,Pb,Cd,Zn and Cu were measured , finally the safety of corn was assessed. [ Result ] 5 corn samples were heavily contaminated, 1 samples was moderately contaminated, and 4 were lightly contaminated. The key pollutants in the corn were Pb and Zn. The corn showed different enrichment capability for the pollutants. The bioconcentration factors ranked Zn > Cu > Pb > Cd > As, which implies that the corn had a limited enrichment capability to Cd and As. Though the soil was polluted heavily by Cd and As,the key pollutants in corn were Zn and Pb. [Conclusion] The research could provide scientific references for the safety management of agricultural products in Daehang minging area in Guangxi.