重金属污染的治理及重金属对水生植物的影响

The Effect of Heavy Metals on Water Plants and Its Control

水体重金属污染已经成为一个日益严重的环境问题,了解水体重金属污染原理、处理水体重金属,已经成为一个必须解决的课题。综述了重金属的来源,在国内外的污染现状,以及具体的治理方法,分析了各种方法的优缺点。在所有的方法中,利用水生植物修复是最有潜力的。并重点讨论了常见重金属离子对水生植物的影响,包括重金属对水生植物伤害的作用机理、毒害途径及其影响水生植物吸收重金属的因素,统计了水生植物对重金属离子的耐受上限。

The paper reviews the source of heavy metals, its pollution status and control methods at home and abroad, and points out that the phytoremediation by water plants is the most potential method after analyzing advantages and disadvantages of all different control methods. The paper discusses the harmful mechanism and toxic paths to water plants, and the factors affecting absorption of heavy metals by water plants, and summarizes the maximum tolerant values of different water plants to heavy metal ions.