γ-辐照预处理太湖源水的研究  

Pretreatment of Taihu Lake raw water by γ-irradiation

作　　者：张继彪[1] 郑正[1] 赵永富[1] 赵坦[1] 钟云[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

出　　处：《生态环境》2007年第3期735-738,共4页Ecology and Environmnet

基　　金：国家自然科学基金项目(10475040)

摘　　要：γ-辐照是一种高级氧化技术。为考察γ-辐照对水华爆发时期太湖源水预处理的效果,采集了此时期水样进行了预处理研究。结果表明：采集的水样处于富营养化状态;水样直接进行γ-辐照,其中的微囊藻毒素-LR和微囊藻毒素-RR得到有效降解。在10kGy的辐照剂量下,微囊藻毒素-LR和微囊藻毒素-RR的降解率均大于63%,降解后微囊藻毒素-LR质量浓度低于国家规定标准。碳酸钠的加入促进了微囊藻毒素的降解,但是效果不是很明显,降解率提高最大幅度为7.8%。γ-辐照对源水中的其他有机物质具有一定的去除作用。水样经辐照后,pH值的变化幅度最大为0.4,但pH仍在7.0-8.0之间。辐照技术在水华爆发时期水源地水预处理方面具有应用价值。γ-irradiation was one kind of the advanced oxidation technologies. The eutrophic water samples obtained from Lake Taihu in different times were pretreated directly by γ-ray. Microcystin-LR and microcystin-RR could be degraded by γ-irradiation. The degradation efficiencies for microcystin-LR and microcystin-RR were all greater than 63% at the radiation dose of 10 kGy and the residual concentrations of microcystin-LR were lower than the national criterion. The addition of sodium carbonate could enhance the degradation efficiency of microcystin-LR by 7.8% but, the effect was not very remarkable. Other organic matters were also removed at the same time. The changes ofpH value were not greater than 0.4 the the pH values of water samples after being irradiated were from 7.0-8.0. γ-irradiation was proved a valuable technique for pretreating raw water from source water area.

关 键 词：Γ-辐照 太湖源水 预处理 

分 类 号：X524[环境科学与工程—环境工程]