EDTA去除土壤重金属离子影响研究

植物提取修复技术（Phytoremediation）是一种环境友好的重金属污染土壤原位修复技术而得到广泛使用,但修复植物的提取效率经常受到目标金属的低植物有效性所限制。大量试验研究结果表明,添加乙二胺四乙酸（ethylenedi-aminetetraacetic acid,EDTA）不但可以提高富集植物对重金属的积累,而且对一般作物也具有同样的效果。系统介绍了EDTA去除土壤重金属离子的机理、影响因素,旨在为提高EDTA---植物提取修复技术去除土壤重金属离子的效率,并提出了以后的发展趋势。

Study on the Effects of the Removal of Soil Heavy Metal Ions by EDTA

Phytoremediation is an environmentally friendly in situ technique for cleaning up metal contaminated land.Efficient metal uptake by remediation plants is often limited by low phyto-availability of targeted metals.Most research results showed that adding EDTA could not only enhance the accumulation of hypertolerant plants to heavy metals,but it could also have the same effect on common plants.The mechanism and influence factors of the removal of soil heavy metal ions by EDTA were systematically introduced,in...