摘要
利用发光细菌法考察了氯化/脱氯消毒过程中污水水质对消毒产生急性毒性的影响。研究发现,为准确客观地作出评价,首先应将不同加氯方式分开考虑;作为有毒副产物前体有机物的表征指标,UV254优于DOC,而DOC又优于COD;UV254值与有毒副产物前体物数量具有较好的相关性;在温度为20℃、消毒时间为30min、pH值为7.0的标准消毒条件下,当有效氯投量为10和50mg/L时,可以预测出峰点前加氯消毒后污水急性毒性增量(以Zn2+浓度表示)。
Photo-bacteria bioassay was used to study the effect of wastewater characteristics on acute toxicity of disinfected wastewater during chlorination/dechlorination. It is found that consideration shall be given respectively to different chlorine addition method to make accurate and objective evaluation. As the characteristic index for expressing the precursors of toxic by-products, UV_(254) is superior to DOC, and DOC is superior to COD; UV_(254) is in good correlation with the quantity of precursors of toxic by-products. Under the standard disinfection conditions, i. e, temperature of 20 ℃, disinfection time of 30 min, and pH of 7.0, when the dosage of available chlorine is 10 mg/L and 50 mg/L, the acute toxicity increment (expressed as Zn^(2+) concentration) of disinfected wastewater can be predicted.
出处
《中国给水排水》
CAS
CSCD
北大核心
2004年第12期17-20,共4页
China Water & Wastewater
基金
国家自然科学基金资助项目(20277025)
国家重点基础研究发展规划(973)项目(G1999045711)
教育部留学回国人员科研启动资金资助项目
关键词
污水水质
氯化消毒
急性毒性
wastewater characteristics
chlorination disinfection
acute toxicity
