Abstract:

Cu is an essential micronutrient for plant, but Cu excess will seriously affect the plant growth and animal health. With the development of modern agriculture and industry, Cu has become one of the main pollution elements in China's heavy metal contaminated soil. As a research focus and frontier field in remediation of environmental contamination, phytoremediation is a green technology which has various advantages and is incomparable to other traditional soil contamination remediation methods. In recent years, studies on phytoremediation of Cu polluted soil in china are developing rapidly. Elsholtzia splendens, Commelina communis, Ricinus communis and other copper hyper-accumulators have been discovered. Meanwhile, organic acids and microbial resistance to Cu can also enhance the repair of hyper-accumulators. This article reviews the general principles of phytoremediation, introduces the effect of hyper-accumulators on Cu enrichment, which has attracted more study focus at present. It also expounds hyper-accumulators tolerance to Cu, its detoxification mechanism and other factors-invigoration effect.

Key words: soil copper contamination, hyper-accumulator, phytoremediation

摘要：

铜是植物必需的营养元素，但是过量的铜会严重影响动植物的生长，随着现代工农业的发展，铜已经成为了我国重金属污染土壤中主要的污染元素之一。在污染土壤的修复措施中，植物修复是一种绿色技术，具有传统土壤治理方法所无法比拟的优点，也是现今国际环境修复的热点和前沿领域。近年来，我国铜污染土壤的植物修复研究发展很快，发现了海州香薷、鸭跖草、蓖麻等铜超积累植物，同时有机酸、耐铜微生物也能加强超积累植物的修复作用。综述了植物修复的一般原理，介绍了现今研究较多的超积累植物对铜的富集效果，超积累植物对铜的耐性及解毒机理以及其他因素的强化作用。

关键词: 土壤铜污染；超积累；植物修复