γ-辐照对水中腐殖酸去除的研究  

HUMIC ACID REMOVAL IN WATER BY γ-IRRADIATION

作　　者：张继彪[1] 郑正[1] 赵坦[1] 于鑫[1] 赵永富[1,2] 唐登勇[1] 徐悦[1] 

机构地区：[1]污染控制与资源化研究国家重点实验室,南京大学环境学院,南京210093 [2]江苏省农业科学院原子能研究所

出　　处：《环境化学》2007年第6期749-752,共4页Environmental Chemistry

基　　金：国家自然科学基金项目(No.10475040)

摘　　要：以腐殖酸作为消毒副产物前驱物的代表,研究了γ-辐照对其去除效果.结果表明,γ-辐照对水中腐殖酸具有较好的去除作用.腐殖酸初始浓度为10mg·l-1时,在1.0kGy的辐照剂量下,腐殖酸去除率为88.6%,总有机碳减少62.8%,色度去除率为76%.随着辐照剂量的增加,氧化还原电位先增大后减小,而电导率则相反.在相同的辐照剂量下,初始浓度较低的腐殖酸去除率较高.碳酸盐对辐照去除腐殖酸具有抑制作用,中性条件有利于γ-辐照对腐殖酸的去除.辐照去除腐殖酸的过程可用一级动力学描述.Humic acid was taken as a representative to test the effect of γ-irradiation on the precursors of disinfection by-products removal. The results showed that γ-irradiation was efficient in removal of humic acid. The removal rate of humic acid could reach 88.6% at the initial concentration of 10mg·l^-1 when 1. 0kGy was adopted as the radiation dose. At the same time, loss of total organic carbon was 62.8% and the removal efficiency of color was 76%. With the increase of radiation dose, the Oxidation Reduction Potential first enhanced and then decreased, while it was contrary for the change of electrical conductivity. At the same radiation dose, the removal value was higher when the initial concentration was lower. CO^- inhibited the removal rate and the removal was enhanced in a neutral medium. The reaction could be depicted by first order reaction kinetics.

关 键 词：Γ-辐照 消毒副产物 前驱物 腐殖酸 

分 类 号：X132[环境科学与工程—环境科学]