摘要
本文以腐植酸溶液的氯化为实验模型,用正交设计法研究了水的pH值、温度、接触时间、腐植酸和游离氯浓度五个因素对氯化饮用水致突变性的影响。结果表明:样品的致突变活性与腐植酸和游离氯浓度呈正相关;与pH值呈负相关;在氯与腐植酸溶液接触后的最初数小时内,样品的致突变活性迅速增强,至7.5小时达高峰,以后,则随时间的延长而逐渐降低;温度的变化对氯化饮用水的致突变活性影响较小。
Chlorination of commercial humic acid was used as a modle in this study. The effect of pH value, temperature, contact time, humic acid and free chlorine concentration on mutagenic activity of the chlorinated drinking water were studied by orthogonal design. The microtitre fluctuation test was applied to determine muta-genicity of the sample. The results showed, humic acid concentration, free chlorine dosage and pH value were timportant factors. While contact time and temperature were less important. The mutagenic activity of chlorinated drinking water was positive correlative with humic acid concentration and free chlorine dosage in a proper range. ThepH value from 3 to 11 would decrease the activity gradually. For the contact time,the mu-tagenicity of the sample increased rapidly in the first few hours, and the peak value was reached at 7.5 lours. Then tle activity was reduced gradually. The temperature variation had little effect on mutagenicity.
出处
《环境与健康杂志》
CAS
CSSCI
CSCD
北大核心
1990年第2期54-56,共3页
Journal of Environment and Health
