城市工业区周边土壤-水稻系统中重金属的迁移累积特征  

BEHAVIORS OF HEAVY METALS IN SOIL-RICE SYSTEM AROUND IN INDUSTRIAL AREA AROUND CITY

作　　者：严莎[1,2] 凌其聪[1,2] 严森[1,2] 鲍征宇[1] 陈忠大 彭振宇 

机构地区：[1]中国地质大学武汉生物地质与环境地质教育部重点实验室,武汉430074 [2]中国地质大学地球科学学院,武汉430074 [3]浙江省地质调查院,杭州311203

出　　处：《环境化学》2008年第2期226-230,共5页Environmental Chemistry

基　　金：国土资源大调查项目资助(项目编号:12120100511103)

摘　　要：对H市工业区土壤-稻米-谷壳体系中重金属的迁移累积特征进行分析,结果显示,不同重金属元素的迁移累积特征不同,Cd易于从土壤中向稻谷籽实迁移,而Cu,Zn,Cr,Ni,As和Hg等迁移能力则较弱.水稻籽实中不同重金属在稻米和谷壳之间的分配规律不同.营养元素Cu和Zn有向稻米迁移累积的趋势,而有毒有害重金属Pb,Cd,Cr,Ni和As则主要累积于谷壳中,Cr和Ni在稻米和谷壳之间的分配较均衡.重金属在稻米中的累积能力为:Cd>Zn>Ni>Cu>Pb>Cr>Hg>As,而在谷壳中则为:Cd>Pb>Ni>Zn>Cr>Cu>As>Hg.Concentrations of heavy metals were determined in rice and rooted soil samples collected in industrial area around city. The translocation and accumulation behavior of heavy metals in the soil-brown rice-chaff system were different significantly as Cd tended to move from rooted soil to rice while Cu, Zn, Cr, Ni, As and Hg was still detained in soil. The distribution patterns of heavy metals between brown rice and chaff could be divided into three types ： （ 1 ） elements which tended to accumulate in brown rice, such as Cu and Zn ; （2） elements which tended to accumulate in chaff, such as Pb, Cd, Cr, Ni and As; （3） elements which tended neither to accumulate in chaff, nor to brown rice such as Hg. As being showed by the transfer factors, the transformation ability of heavy metals were different between brown rice and chaff. The ability of eight heavy metals in brown rice was Cd 〉 Zn 〉 Ni 〉 Cu 〉 Pb 〉 Cr 〉 Hg 〉 As, and Cd 〉 Pb 〉 Ni 〉 Zn 〉 Cu 〉 Cr 〉 As 〉 Hg in chaff.

关 键 词：土壤 水稻 重金属 

分 类 号：X131.3[环境科学与工程—环境科学] X173