水生植物去除废水重金属研究进展

Research Progress in Application of Clay Minerals and Their Derivatives in Heavy Metal Wastewater Treatment

指出了水资源重金属污染是一种严重影响人类、植物和动物的污染问题。植物修复是一种经济有效的重金属污染修复技术,并能够自然地恢复水生生物系统,该方法已成功地应用于人工湿地(CWs)中。目前,学者们正在研究许多水生植物种类,以确定其在植物修复方面的应用潜力和有效性,特别是生长速度快的植物,即大型植物。结果表明:植物过滤是从水中去除重金属主要作用,自由漂浮植物由于其独特的形态和较高的生长速度,比沉水植物和出水植物更能有效地吸收重金属。综述了多种水生植物去除重金属的潜力,重点介绍了4种著名的水生植物(超富集植物):水浮莲(Pistia stratiotes)、水葫芦(Eicchornia spp)、浮萍(Lemna spp)、槐叶苹(Salvinia spp)修复重金属的机理和作用,并对水生植物修复重金属的发展、方法和前景进行了论述。

Heavy metal pollution in water resources is a serious problem affecting humans,plants and animals.Phytoremediation is a cost-effective heavy metal contaminated site remediation technology that can naturally restore aquatic biological systems.This method has been successfully applied to constructed wetlands(CWs).At present,scholars are studying a number of aquatic plant species to determine their potential and effectiveness in phytoremediation,especially for plants that grow fast,i.e.large plants.The results show that plant filtration is the main role of removing heavy metals from water.Free-floating plants are more effective at absorbing heavy metals than submersible plants and effluent plants due to their unique morphology and higher growth rate.This paper reviews the potential of many aquatic plants to remove heavy metals,focusing on four famous aquatic plants(super-enriched plants):Pistia stratiotes,Eicchorniaspp,Lemnaspp,Salvinia spp.It also comprehensively discusses the development,methods and prospects of aquatic plants for the repair of heavy metals.