摘要
粉末活性炭(PAC)经氧化改性后其表面极性增强,可提高对水中极性有机物的吸附效果;而PAC经还原改性后则增强了其疏水性,有利于其对水中疏水性有机物的吸附。以天津滦河水为处理对象,考察了改性PAC与O3联用时对有机物的去除效果。结果表明:在改性PAC与O3投量分别为15和1 mg/L的条件下,氧化改性的PAC与O3联用时,对CODMn和UV254的去除率分别为48.54%和46.35%,较未改性的PAC与O3联用时分别提高了7%和2%;还原改性的PAC与O3联用时,对CODMn和UV254的去除率分别为39.48%和38.96%,较未改性的PAC与O3联用时分别降低了2%和6%。
PAC modified with oxidation can increase the adsorption effect of polar organic matters in water, while PAC modified with reduction can increase the adsorption effect of hydrophobic organic matters in water. The raw water of Luan River is used to investigate the purification effect of organic matters by modified PAC combined with ozone. The results reveal that under the condition that the dosages of modified PAC and ozone are 15 mg/L and 1 mg/L, in the combined use of PAC modified with oxidation and ozone, the removal rates of CODMn and UV254 are 48.54% and 46.35% after filtration, with an increment of 7% and 2% as compared with the combined use of original PAC and ozone, and in the combined use of PAC modified with reduction and ozone, and 38.96% after filtration, with a decrement of 2% nal PAC and ozone. the removal rates of CODMn and UV254 are 39.48% and 6% as compared with the combined use of original PAC and ozone.
出处
《中国给水排水》
CAS
CSCD
北大核心
2007年第5期62-64,共3页
China Water & Wastewater
基金
国家高技术研究发展计划(863)项目(2002AA601140)
关键词
粉末活性炭
氧化改性
还原改性
臭氧
有机物
PAC
modified with oxidation
modified with reduction
ozone
organic matter
