工业污水中除铊的方法

Methods for Removing Thallium From Industrial Sewage

铊是一种稀有分散的重金属元素,有剧毒,对人体会造成很大危害。但随着矿物开采以及含铊工业废物的产生,对生态环境污染不断加剧。介绍了含铊污水中除铊的几种方法,包括化学沉淀法、离子交换法、吸附法等。化学沉淀法主要是根据化学反应后形成的重金属化合物不溶于水的特性,并通过过滤达到除铊的效果。离子交换法主要通过其他离子与污水中的铊离子进行交换,从而达到除铊的目的。吸附法主要是通过吸附剂使铊由液相转移到吸附剂固体表面从而实现铊污水的净化。

Thallium is a rare and dispersed heavy metal element,which is highly toxic and can cause great harm to human body.However,with the mining of minerals and the production of industrial wastes containing thallium,the pollution of ecological environment is increasing.In this paper,several methods of removing thallium from thallium containing wastewater were introduced,including the chemical precipitation method,ion exchange method and adsorption method and so on.Chemical precipitation method is mainly based on the insoluble characteristics of heavy metal compounds formed after chemical reaction,to achieve the effect of thallium removal through filtration.Ion exchange method mainly exchanges other ions with thallium ions in sewage,so as to achieve the purpose of thallium removal.Adsorption method is mainly to transfer thallium from liquid phase to solid surface of adsorbent through adsorbent,so as to realize the purification of thallium wastewater.