超量积累植物
环境修复
植物修复
危险废物
商业化
环境科学
环境规划
危害
生化工程
环境保护
风险分析(工程)
工程类
业务
废物管理
生态学
污染
土壤水分
生物
政治学
营销
土壤科学
法学
作者
Gang Wu,Hee Kap Kang,Xiaoyang Zhang,Hongbo Shao,Li-Ye Chu,Chengjiang Ruan
标识
DOI:10.1016/j.jhazmat.2009.09.113
摘要
Mechanism of four methods for removing hazardous heavy metal are detailed and compared-chemical/physical remediation, animal remediation, phytoremediation and microremediation with emphasis on bio-removal aspects. The latter two, namely the use of plants and microbes, are preferred because of their cost-effectiveness, environmental friendliness and fewer side effects. Also the obvious disadvantages of other alternatives are listed. In the future the application of genetic engineering or cell engineering to create an expected and ideal species would become popular and necessary. However, a concomitant and latent danger of genetic pollution is realized by a few persons. To cope with this potential harm, several suggestions are put forward including choosing self-pollinated plants, creating infertile polyploid species and carefully selecting easy-controlled microbe species. Bravely, the authors point out that current investigation of noncrop hyperaccumulators is of little significance in application. Pragmatic development in the future should be crop hyperaccumulators (newly termed as "cropaccumulators") by transgenic or symbiotic approach. Considering no effective plan has been put forward by others about concrete steps of applying a hyperaccumulator to practice, the authors bring forward a set of universal procedures, which is novel, tentative and adaptive to evaluate hyperaccumulators' feasibility before large-scale commercialization.
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