锡冶炼厂周边果园土壤和果树重金属污染研究

Heavy Metal Pollution of Soil and Fruiter in the Orchard Surrounding a Tin Smelter

研究了某冶炼厂周边果园土壤及柑橘叶片中重金属含量,并对其进行相应评价。结果表明,土壤重金属As、Pb、Sn、Cd含量分别为30.57、28.94、2.87、0.07mg/kg。处于冶炼厂主导风下风向及夏季风下风向的果园中土壤中As单项污染指数超过1,判定为轻度污染。各果园Pb、Cd单项污染指数均小于1,Sn含量在允许范围内。柑橘叶中重金属含量顺序为As>Sn>Pb>Cd,As为今后冶炼厂监控重点。

The heavy metal contents in soil and orange leaves in the orchards surrounding a tin smelter were researched and assessed.The results showed that the contents of Pb,Cd,As and Sn in soil were 28.94 mg/kg,0.07 mg/kg,30.57 mg/ kg and 2.87 mg/kg,respectively.In the orchards which locates under the prevailing wind direction of the tin smelter,the single-factor index of As was over 1,which reaching the ＂mild-pollution＂ level.Both the single-factor indices of Pb and Cd were below 1,the content of Sn was in the permitted scope.The order of heavy metal content in orange leaf was AsSnPbCd,so As should be strictly controlled by the tin smelter in the future.