摘要
以某地表水为原水(TOC为5.3 mg/L),研究了氯、氯胺和臭氧3种消毒剂对可同化有机碳(AOC)的影响。结果表明,投加1 mg/L氯氧化30 min就会使AOC升高近3倍。投加3种剂量(1、23、mg/L)的氯胺,氧化30 min时AOC增加不到1倍;氧化24 h时AOC浓度均比30 min时的高,这说明氯胺的作用机理与氯不同。投加臭氧2.0 mg/L氧化30 min时可使AOC增加2.4倍;当臭氧质量浓度大于2.0 mg/L时,AOC开始下降,这说明一部分中间产物进一步被氧化成了二氧化碳和水。
The effects of three disinfectants, i. e. , chlorine, chloramine and ozone on the assimilable organic compounds （AOC） in drinking water treatment were tested. The water containing TOC of 5.3 mg/L was used. Compared with the AOC value in raw water, AOC in effluent was nearly 3 times higher for chlorine addition of 1 mg/L and 30 min contact time （CT） and less than 1 time higher for chloramine addition of three doses （1 mg/L, 2 mg/L, 3 mg/L） within the same CT, but rose more for chloramine within 24 h CT. This indicated that the disinfection mechanisms between chlorine and chloramine were different and the later slowly produced AOC; Ozone showed its action more rapidly than chloramines and addition of 2 mg/L ozone to raw water could make AOC in effluent raised 2.4 times higher for 30 min CT, but more doses addition gave less AOC, indicating that a part of intermediates produced by lower doses of ozone were oxygenated into CO2 and H2O under conditions of higher doses of ozone.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2005年第6期457-459,共3页
Environmental Pollution & Control
关键词
消毒剂
地表水
AOC
Disinfectants Surface water Assimilable organic carbon（AOC）
