摘要
本文以含碳酸水溶液和天然水体为背景,研究了重金属镉、铜、铅的化学沉淀问题.以光散射浊度法和平衡溶解度测定法进行模拟实验,以综合平衡模式计算加以对照,符合情况良好.得到重金属沉淀的形态、临界pH值、平衡溶解度及溶解-沉淀区域图.所得结果可应用于天然水环境,表明化学沉淀是与吸附作用同样重要的重金属向固相转化的过程.
The chemical precipitation of heavy metals such as Cd,Cu and Pb in aqueous carbonate solution and natural aquatic systems was studied. By determining solubility and lightscattering turbidity and comparing with thermodynamics! equilibrium model, the chemical species, critical pH value and solubility-precipita-tipn diagrams of heavy metals were obtained. It was demonstrated that the chemical pricipitation is as important a process as adsorption in the transformation of heavy metals from aqueous into solid phase in the natural fresh aquatic environment
出处
《环境化学》
CAS
CSCD
北大核心
1989年第6期1-10,共10页
Environmental Chemistry
基金
国家自然科学基金
