Gamma Irradiation for Disinfection of Water and Wastewater

9705137布拉奇利这是一个支持研究的奖项，旨在确定微小隐孢子虫卵囊、蓝氏贾第鞭毛虫包囊、几种细菌病原体和大肠杆菌MS-2在水悬液中受到伽马辐射时被灭活的条件。灭活实验将在间歇反应堆中进行，使用的是钴60源。研究条件包括碳酸盐碱度和溶解氧对失活过程的影响。研究伽马辐射对水中有机物质的潜在毒理学影响的方法是，将来自公共供水来源的未经处理的水和在常规消毒过程之前经过处理的水的样本置于伽马源的辐射下。辐射前后这些水样中的有机物质将用交换树脂浓缩，这些浓缩物的致突变性将通过Ames测试程序来确定。这项研究的结果有望为利用伽马辐射源对水和废水进行消毒的潜在工程设计提供指导。除了提供灭活病原体和销毁有机污染物的过程外，基于使用电离辐射对水和废水进行消毒的环境技术还有可能避免和防止污染，因为它为高放射性废物产生的产品提供了有益的用途。***

9705137 Blatchley This is an award to support research to determine conditions under which Cryptosporidium parvum oocysts, Giardia lamblia cysts, several bacterial pathogens and coliphage MS-2 in aqueous suspension are inactivated when subjected to gamma radiation. The inactivation experiments will be conducted in batch reactors using a Cobalt 60 source. Conditions to be studied include the influence of carbonate alkalinity and dissolved oxygen on the inactivation process. The potential toxicological effects of gamma radiation on organic substances in water will be studied by subjecting samples of untreated water from public water supply sources and treated water prior to conventional disinfection processes to radiation from the gamma source. Organic substances from these water samples prior to and following radiation will be concentrated using exchange resins and the mutagenicity of these concentrates will be determined by use of the Ames test procedure. Results of this research are expected to provide guidance for potential engineering design of processes using sources of gamma radiation to disinfect water and wastewater. In addition to providing a process for inactivation of pathogens and destruction of organic contaminants, environmental technologies based on use of ionizing radiation for disinfection of water and wastewater have the potential for avoidance and prevention of pollution by providing beneficial uses for products derived from high level radioactive wastes. ***