微污染水源水中重金属和有机污染物的去除

针对中国饮用水源中的微量重金属及有机物污染存在于常量的碱金属、碱土金属与 Fe,Mn等过渡金属背景下的特点 ,提出了用弱碱性阴离子交换树脂去除饮用水中的微量重金属及有机污染物的处理工艺。文中讨论了弱碱性阴离子交换树脂去除水中重金属及有机物的原理和特点 ,并用14种国产弱碱阴树脂研究了去除重金属及有机污染物的可行性。结果表明 ,弱碱阴树脂对苯酚的去除以物理吸附作用为主 ,并可通过表面络合作用去除 Hg2 ,Cd2 。弱碱阴树脂确实能有效去除饮用水源中的重金属 (Hg2 ,Cd2 )及有机物 (苯酚 ) ,并能使出水满足饮用水水质标准

Removal of heavy metals and organic contaminants from micropolluted drinking water supplies

Drinking water resources in China are far and wide polluted with trace amounts of organic pollutants and heavy metals with alkaline metals, alkali earth metals and transition metals such as Fe and Mn at high concentrations. A weakly basic anion exchange resins (WBAER) is recommanded to remove heavy metals and organic contaminants from drinking water supplies. The principles and characteristics of this process are discussed with 14 kinds of commercially available domestic WBAER used to investigate the practicaility of this process. The results show that the removal of phenol by WBAER is mainly due to physical adsorption, while that of Hg 2 and Cd 2 is due to surface complexes. WBAER could effectively remove heavy metal ions and organic contaminants from drinking water supplies so that the effluent can meet the national criteria for drinking water.