【摘要】 自新型冠状病毒肺炎疫情发生以来，含氯消毒剂大量使用，地表水中余氯污染受到越来越多关注。该文针对中国地表水环境质量标准对余氯浓度缺乏限值的问题,搜集筛选了游离氯和化合氯对水生生物的急性和慢性毒性数据,使用log-normal和log-logistic模型建立物种敏感度分布法，推导中国游离氯和化合氯的地表水水质基准。通过综合分析和比较,得到淡水游离氯短期和长期的水质基准值(0.012 mg/L和0.003 9 mg/L)、海水游离氯短期和长期的水质基准值(0.022 mg/L和0.002 3 mg/L)、淡水化合氯短期的水质基准值（0.006 8 mg/L）作为最终的基准推荐值。通过与国内外现有余氯相关水质标准比较,为中国余氯水质基准制定提供理论依据。更多还原

【Abstract】 Chlorine-containing disinfectants have been used in rather great amount since the outbreak of COVID-19. So the problem of residual chlorine pollution of surface water has drawn more and more public concerns. Aming at the present situation of lacking the limitation value of residual chlorine concentration in the environmental quality standards for surface water in China, the authors collected the corresponding toxicity data of free chlorine and combined chlorine to aquatic organisms, and developed the method of species sensitivity distribution(SSD) based on log-normal and log-logistic models to tentatively set up the water quality criteria of free chlorine and combined chlorine. By using comprehensive analysis and comparative study, the final criteria values were recommended: the short-term and long-term water quality criteria of free chlorine in freshwater being 0.012 mg/L and 0.003 9 mg/L, respectively; the short-term and long-term of free chlorine in saltwater being 0.022 mg/L and 0.002 3 mg/L, respectively; and the short-term water quality criteria of combined chlorine in freshwater 0.006 8 mg/L. It is expected that the results could provide scientific basis for formulating water quality criteria of residual chlorine in China through further comparative studies in terms of the existing domestic and foreign residual-chlorine-related water quality standards.更多还原