作　　者： ; ; ; ; ; ;

机构地区： 北京师范大学环境学院水环境模拟国家重点实验室

出　　处： 《北京师范大学学报（自然科学版）》 2008年第5期545-549,共5页

摘　　要： 对华北平原腹地北侧的廊坊市境内土壤一陆地棉（G．hirsutum L．）系统调查、采样和分析结果发现：陆地棉能有效地将土壤耕作层中IB族重金属元素（Cu、Ag和Au）吸附并富集于其植株之中，即陆地棉根系、茎杆、果壳、籽粒和纤维对土壤耕作层中Cu的生物吸收系数A在1．53～6．57之间，对Ag的生物吸收系数在2．005～19．834之间，对Au的生物吸收系数在0．882～2．672之间；通过种植陆地棉萃取土壤中IB族元素，解决了当前土壤重金属污染的植物修复技术所面临的生物量少、难以商业化和大面积推广、易使土壤中重金属重新进入区域生态系统食物链等问题，从而形成了具有经济、社会和环境效益的土壤重金属污染修复的实用技术；总结得出了土壤重金属污染修复的一些原则和机制． In a systematic survey of soil-cotton system in Langfang City in northern hinterland of The Northern China Plain, soil and plant samples were collected, IB group element （Cu, Ag and Au） contents were determinated using high resolution inductively coupled plasma mass spectrometer （IR-ICP-MS, Finnigan, USA）. Data showed that Gossypium. hirsutum L. could effectively absorb IB group elements from arable soil, and get these elements accumulated in different organs such as roots, stems, shells, seeds and fibres. Bioabsorption coefficient for Cu in different organs ranged from 1.53 to 6.57, for Ag from 1.53 to 6.57, and for Au from 0. 882 to 2. 672. Using Gossypium. hirsutum L. to extract IB group elements from contaminated soil has unparalled advantages, such as the fact that Gossypium. hirsutum L. does not accumulate other metals, with adequate biomass, easier to commercialize and applied widely, and will not falicitate heavy metal re-entry into the food chain of regional ecosystem. Thus with this method a practical remediation technology for soil pollution with heavy metals is found, with multiple benefits towards the economy, society and enviroment.

关 键 词： 陆地棉 农业土壤 族金属元素污染 修复技术

领　　域： [环境科学与工程] [农业科学] [农业科学]