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研究了粉末活性炭、硅藻土和膨润土等3种常用吸附剂对三氯乙醛(CH)的去除作用,并以南方某水源原水为研究对象,分析3种吸附剂对于CH前体物(CH1d和CHFP)的去除效果。结果表明,膨润土和粉末活性炭适用于对CH的去除,最大去除率分别为95.93%和86.86%。225 mg·L-1投加量条件下,前15 min膨润土和粉末活性炭对CH吸附效果最快,2种吸附剂对CH去除率分别为63.36%和51.84%;反应2 h后,对CH的吸附已达到饱和,此时膨润土和粉末活性炭对CH去除率分别为89.36%和61.75%。粉末活性炭和硅藻土适用于对CH前体物的去除,最适投加量均为30 mg·L-1,此时对CH1d和CHFP的去除率分别为57.49%和75.21%、28.27%和50.19%。可根据CH的风险程度高低选择硅藻土或粉末活性炭对CH前体物予以去除。
The effects of three kinds of commonly used adsorbents, such as powdered activated carbon, diatomite and bentonite, on the removal of trichloroacetaldehyde (CH) were studied. Taking a source of raw water in the south as the research object, the effects of three adsorbents on CH precursor And CHFP) removal effect. The results show that bentonite and powdered activated carbon are suitable for the removal of CH with the maximum removal efficiencies of 95.93% and 86.86%, respectively. Under the dosage of 225 mg · L-1, the adsorption of CH on the bentonite and powdered activated carbon was the fastest in the first 15 min, and the CH removal rates of the two adsorbents were 63.36% and 51.84% respectively. After 2 h of reaction, Adsorption has reached saturation, when bentonite and powdered activated carbon removal of CH were 89.36% and 61.75%. Powdered activated carbon and diatomaceous earth are suitable for the removal of CH precursors, the optimum dosage is 30 mg · L-1, the removal rates of CH1d and CHFP are 57.49% and 75.21%, 28.27% and 50.19%. CH precursors can be removed according to the degree of risk of CH by selecting diatomaceous earth or powdered activated carbon.