文档介绍：镉污染土壤的植物修复
陈凌作者:陈凌, 女,1962年生,本科,讲师,研究方向为环境化学。
(嘉兴职业技术学院生物与环境分院, 浙江嘉兴 314036)
摘要镉在土壤中有稳定、积累和不易消除的特点,且可通过食物链富集使人体产生慢性中毒。中国农村镉污染尤其严重。植物修复技术是优秀的土壤镉污染治理技术,近年来成为研究的热点。土壤镉污染植物修复技术包括植物提取、植物挥发、植物稳定和植物促进等。在治理镉污染土壤时,应根据土壤条件、污染的程度、预期的修复目标、时间限制和成本等因素综合考虑,选择合适的修复技术。
关键词镉土壤污染植物修复
Phytoremediation of soil polluted by cadmium Chen Ling.(Department of Biology and Environment, Jiaxing Vocational Technical College, Jiaxing Zhejiang 314036)
Abstract:Cadmium in the soil is stable,accumulative,and hard to be removed. Through food chain,it may do harm to people by resulting in chronic diseases. In Chinese vast countryside,the soil pollution by cadmium is serious. Phytoremediation technology is the best soil cadmium pollution control technology, and the research in recent years e a hot spot. Cadmium pollution of soil phytoremediation technology is phytoextraction, phytovolatilization, phytostabilization and promoting plant. In the treatment of cadmium-contaminated soil, the soil conditions, the extent of contamination, the expected restoration goals, timeconstraints, costs and other factors should be considered, to choose a suitable repair technique or bination process.
Keywords:cadmium;soil pollution;phytoremediation
对于土壤重金属污染的治理,有物理、化学和生物3大类,但由于物理方法投入大,化学方法难持久,对大面积土壤污染更是无可奈何[1]。据报道,对1 hm2 面积的污染土壤进行工程治理(客土),每1 m深土体的耗费高达800万~2 400万美元[2],如此惊人的代价迫使人类寻求新的防治方法。植物修复技术是20世纪90年代发展起来的一种低成本、有效的绿色环境净化技术,