广西大厂矿区某屯玉米重金属污染评价

Assessment of Heavy Metal Contamination of Corn from Dachang Mining Area in Guangxi

[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 Dachang mining area in Guangxi.[Method]10 corn samples and 10 soil samples were collected from a village in Guangxi Dachang 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 ZnCuPbCdAs,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 Dachang minging area in Guangxi.