非食用经济作物修复重金属污染土壤研究进展

Research Progress in Remediation of Heavy Metal Contaminated Soils by Non-edible Economic Crops

土壤重金属污染已成为全世界面临的主要环境问题之一,治理修复重金属污染土壤倍受关注。在不同的防治和修复技术中,植物修复技术拥有独特优势被人们青睐,其中非食用经济作物具有不进入食物链、生物量大、环境适应性强、能充分利用重金属污染耕地并能带来经济效益等优势而成为植物修复领域的研究热点。本文总结了国内外学者对棉花、蓖麻、苎麻、桑树、剑麻5种非食用经济作物对不同重金属的富集特性以及耐受性的研究进展,同时对非食用经济作物修复重金属污染土壤进行了展望。

Soil heavy metal pollution has become one of the major environmental problems all over the world. Remediation of heavy metals in soil is one of the most popular research subjects. Among the remediation technologies, the phytoremediation was paid more attention due to its advantages. Compared with other hyperaccumulators, the non-edible economic crops have become the hot research objects in the phytoremediation field due to their large biomass、strong environmental adaptability and considerable available benefits, and most importantly because the non-edible economic crops do not enter the food chain. This paper mainly summarizes the research progress, by domestic and foreign scholars, on the enrichment and absorption capacity of and tolerance to different heavy metals by five non-edible economic crops – cotton, castor, ramie, mulberry and sisal. The prospect of non-edible economic crops for remediation of heavy metal contaminated soil is discussed.