Gamma Irradiation for Disinfection of Water and Wastewater

9705137 Blatchley这一奖项旨在支持研究确定在伽马辐射作用下，小隐孢子虫卵囊、贾第鞭毛虫囊、几种细菌病原体和水悬浮液中的噬菌体MS-2失活的条件。灭活实验将在间歇式反应器中使用钴60源进行。研究条件包括碳酸盐碱度和溶解氧对失活过程的影响。将通过将来自公共供水水源的未经处理的水样本和在常规消毒过程之前处理过的水样本置于来自伽马源的辐射中来研究伽马辐射对水中有机物质的潜在毒理学影响。辐射前后这些水样中的有机物质将使用交换树脂进行浓缩，这些浓缩物的诱变性将通过使用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。除了提供一种使病原体失活和破坏有机污染物的方法外，基于使用电离辐射对水和废水进行消毒的环境技术还具有避免和预防污染的潜力，因为它为来自高水平放射性废物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. ***