五常市傍河地下水遗传毒性及健康风险评价

应用SOS/Umu遗传毒性检测方法,检测五常市河水及傍河地下水遗传毒性物质并开展健康风险评价;表征不同季节傍河地下水遗传毒性变化特征.结果表明:五常市河水和傍河地下水中均存在遗传毒性物质,河水遗传毒性水平较高,傍河地下水遗传毒性水平显著低于河水,说明傍河取水(riverbankfiltration,RBF)对河水中的遗传毒性物质有一定去除作用,去除率最高可达99.6%.健康风险评价结果表明:河水及傍河地下水存在致癌风险,风险水平最高可达5.53×10-6;河水及傍河地下水遗传毒性季节变化特征显著,融冰期致癌风险值高于平枯水期和丰水期.表明温度和水量对河水和傍河地下水中遗传毒性物质含量有一定的影响.研究结果可为健全水源地安全管理,优化饮用水处理技术提供基础数据. 

Genetic toxicity and health risk of riverside groundwater in Wuchang City

Genetic toxicity of water collected from river and riverside groundwater in Wuchang City was tested by SOS/Umu assay. Health risk and seasonal distribution of water were also analyzed. Genotoxic substances were found in river-water and riverside groundwater,concentrations of genotoxic substances in river water were found to be higher than in riverside groundwater, suggesting that river bank filtration being effective to remove genotoxic substances from river. The removal rate was found to be up to 99.6％. Health risk assessments showed that both river water and riverside groundwater had carcinogenic risk with the highest risk level at 5.53 () 10-6. In addition, genotoxic substances showed features of seasonal distribution in river water and riverside groundwater. Carcinogenic risk during the melting ice period was found to be higher than other periods,indicating that temperature and water quantity influenced the concentration of genotoxic substance in river and riverside groundwater. The present study helps provide basic data for improving sources safety of drinking-water and for optimizing drinking water treatment technology.