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湖南冷水江锑矿区苎麻对重金属的吸收和富集特性
引用本文:佘玮,揭雨成,邢虎成,黄明,康万利,鲁雁伟,王栋.湖南冷水江锑矿区苎麻对重金属的吸收和富集特性[J].农业环境科学学报,2010,29(1).
作者姓名:佘玮  揭雨成  邢虎成  黄明  康万利  鲁雁伟  王栋
作者单位:湖南农业大学苎麻研究所,湖南省作物种质创新与资源利用重点实验室,湖南,长沙,410128
基金项目:国家863计划重点项目(2007AA061001);;湖南农业大学人才引进科技资助项目(07YT03);;国家科技支撑计划(2006BAD03A0307);;湖南省科技计划(06SK4039)
摘    要:通过野外调查采样,分析了湖南冷水江锑矿区土壤的重金属含量,以及矿区9个采样点的苎麻对Sb、Cd、As和Pb4种重金属的吸收与富集能力及其富集特征。结果表明,矿区土壤受Sb污染严重,9个采样点Sb含量超过全国土壤背景值40~11503倍;伴生有Cd、As、Pb污染,Cd平均含量(13.08mg·kg-1)和As平均含量(82.64mg·kg-1)明显高于土壤环境质量标准的三级警戒值,Pb平均含量(71.27mg·kg-1)明显高于全国土壤背景值。苎麻叶和花混合样中的Sb最高达到1103mg·kg-1;苎麻体内的Cd含量均高于一般植物2~10倍,Cd富集系数最高为2.1,转运系数最高为3;As富集系数最高为1.04,转运系数最高为12.42;苎麻地上部对重金属迁移能力较强,当季对Sb、Cd、As迁移量分别达796.55、11.20和31.34mg·m-2。本研究说明苎麻对复合重金属具有一定的耐性,为复合污染植物修复提供了一种新的种质资源。

关 键 词:锑矿  苎麻  重金属  植物修复  

Uptake and Accumulation of Heavy Metal by Ramie(Boehmeria nivea) Growing on Antimony Mining Area in Lengshuijiang City of Hunan Province
SHE Wei,JIE Yu-cheng,XING Hu-cheng,HUANG Ming,KANG Wan-li,LU Yan-wei,WANG Dong.Uptake and Accumulation of Heavy Metal by Ramie(Boehmeria nivea) Growing on Antimony Mining Area in Lengshuijiang City of Hunan Province[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2010,29(1).
Authors:SHE Wei  JIE Yu-cheng  XING Hu-cheng  HUANG Ming  KANG Wan-li  LU Yan-wei  WANG Dong
Institution:Institute of Ramie/a>;Hunan Agriculture University/a>;China Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization/a>;Changsha 410128/a>;China
Abstract:Ramie(Boehmeria nivea)is a perennial plant species that has large biomass.A study was conducted to investigate heavy metal contents in ramie and its associated soil in a antimony mining area in Lengshuijiang city of Hunan Provice.Contents of such heavy metals as Sb,Cd,As and Pb were determined in ramie from 9 contaminated sites in order to assess their potentials in phytoremediation of heavy metal polluted areas.The result revealed that soils of the mining area were highly contaminated by Sb,the Sb concentr...
Keywords:antimony mining  ramie  heavy metal  phytoremediation  
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