γ-辐照净化水溶液中亚硝酸盐的研究  

Elimination of Nitrite in Water Solution by γ-Ray Irradiation

作　　者：顾春晖[1] 郑正[2] 赵永富[3] 袁守军[1] 江芳[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,江苏南京210093 [2]污染控制与资源化研究国家重点实验室 [3]江苏省农业科学研究院,江苏南京210014

出　　处：《农业环境科学学报》2005年第6期1226-1228,共3页Journal of Agro-Environment Science

基　　金：国家自然科学基金资助项目(10275034)

摘　　要：以强度为1.85×1015BqCo60为辐照源,研究了γ射线辐照对于水溶液中的亚硝酸盐的去除效果。结果表明,Co60-γ射线辐照对于水溶液中的亚硝酸盐具有良好的净化效果,当辐照剂量为0.5kGy时,0.25mg·L-1的亚硝酸盐水溶液可达到完全降解。另外,还做了初始浓度、辐照剂量、初始pH值、碱度的影响试验,并对试验结果进行了讨论。γ-射线辐照节能、高效,是一种有前途的水处理技术。The elimination of nitrite in water solutions under 1.85×10^15BqCo^60 radiation source was studied. The nitrite could be eliminated effectively by Co^60, and totally eliminated at 0.5 kGy dose. The factors influencing the elimination, including doses, initial concentrations, initial pH values, and alkalinities were analyzed. The efficiencies of elimination increased with the doses increase, and doses of 0.3-0.5 kGy were enough to achieve satisfied elimination results for the solutions with NO2-N concentrations of 0.25 mg·L^-1, needn＇t increase further. At the same doses, the elimination rate decreased with the initial nitrite concentration increasing, but no significant differences in the elimination effects were found among them. Lower initial pH value and higher alkalinity improved the elimination of nitrite, probably since they were in favor of the producing of that performed mainly for the elimination. Due to the producing of H3O^＋ during the irradiation process, the pH value of solutions decreased greatly after irradiation.

关 键 词：亚硝酸盐 Γ-辐照 净化水 

分 类 号：X523[环境科学与工程—环境工程]