【摘要】 在室内外不同条件下, 研究了COD、温度、有效氯含量、pH 和光照对漂白粉有效氯衰减的影响, 以及鲤和鲢对有效氯的耐受能力。结果表明: 1) 漂白粉有效氯在水中按ρ= a + be- kt 规律衰减,衰减速率常数(k) 随初始有效氯浓度的减小、温度的升高和COD的增大而加快, 随pH 的下降和光照强度的增加而增加。且温度和COD 对衰减的影响有交互作用; 2) 在本实验条件下, 小于0-3 mg/L 的有效氯24 h 内基本衰减完毕, 大于3-0mg/L的有效氯96 h 后仍有余氯存留; 3) 鲤对漂白粉有效氯的耐受能力大于鲢。更多还原

【Abstract】 The influence of COD, temperature, concentrations of available chlorine, pH and light on attenuation of available chlorine of bleaching powder, and the tolerance of common carp and silver carp to available chlorine were determined under different conditions in a laboratory and on field The results show: 1) attenuation of available chlorine of bleaching powder in water follows the eqution ρ=a+b\%e\%\+\+\{-kt\},attenuation ratio constant (k) increases with reduction in initial concentration of available chlorine, high temperature, increase in COD and light and decrease in pH. In addition, there is a close relationship between temperature and COD and the attenuation; 2) In this experiment, if the concentration of available chlorine was <0.3 mg/L, it was completely attenuated within 24 h, when>3.0 mg/L, still exists after 96 h; 3) Common carp has higher tolerance to available chlorine than silver carp do更多还原