再生水作为景观环境用水的安全评价指标探讨

Risk assessment indicators of reclaimed water for environmental and recreational purpose

景观环境用水是再生水回用的重要途径之一,对其安全性做出合理评价是再生水回用的关键。根据我国再生水中所含主要污染物及其可能的暴露途径,结合国内外相关水质标准,探讨了再生水回用于景观环境水体的安全评价指标。分析了人体健康安全指标(包括有毒有害化学物质指标和微生物学指标)和生态安全指标(包括综合毒性指标和富营养化指标)的意义和适用性,建议研究科学的指标体系和定量化评价方法。

The use of reclaimed water for environment and recreation is one of the important ways of water reuse.A key problem for this way is how to assess the risk of the reclaimed water.According to the major pollutants in reclaimed water and their possible exposure ways,the key assessment indicators of reclaimed water for recreational and environmental use were discussed with considering the related criteria of domestic and foreign countries.The significance and applicability of human health risk indicators(including chemical indicators and microbiological indicators)and ecological risk indicators(including integrated toxicity indicators and eutrophication indicators)were analyzed.The scientific indicators and quantitative assessment methods for reclaimed water used in environmental and recreational fields should be studied further in future.