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选用2种无机高分子混凝剂聚合氯化铁(PFC)和聚合氯化铝(PAC)处理黄河水,考察了混凝剂的投加量对浊度、UV254、DOC和高锰酸盐指数的去除效果,并结合混凝出水的Zeta电位分析其混凝机制.选择粉末活性炭与混凝联用,研究了混凝剂和吸附剂投加量以及二者的投加顺序对有机物去除效果的影响,并对混凝吸附后出水进行加氯消毒,考察水中残余氯随时间的变化.结果表明,2种混凝剂均有较高的浊度去除率(﹥90%).PAC对UV254、高锰酸盐指数和DOC的去除率分别为29.2%、26.1%和27.9%;PFC对三者的去除率分别为32.3%、23.3%和32.9%.PAC在混凝过程中,电中和作用占主导地位;PFC在混凝过程中,吸附架桥和电中和同时发挥作用.混凝-吸附联用处理黄河水样时,有机物的去除率随混凝剂和吸附剂投加量的增加而升高.先混凝后吸附工艺对UV254和DOC的去除效果优于先吸附后混凝工艺.先使用PAC混凝后吸附对UV254和DOC的去除率分别为95.2%和99.9%;对于PFC,先混凝后吸附对UV254和DOC的去除率分别为90.1%和99.9%.但是先投加粉末活性炭能提高矾花的沉降性能,且处理出水在保持持续消毒效果方面优于前者.
Two types of inorganic polymer coagulants, PFC and PAC, were used to treat Yellow River water. The effect of coagulant dosage on turbidity, UV254, DOC and permanganate index , And the coagulation mechanism was analyzed based on Zeta potential of coagulation effluent.Combination of powdered activated carbon with coagulation was studied to study the effect of coagulant and adsorbent dosage and the addition order of the two on organic removal efficiency The results showed that the turbidity removal rate (> 90%) of the two kinds of coagulants was higher than that of the control group.PAC was more sensitive to UV254, The removal rate of permanganate index and DOC were 29.2%, 26.1% and 27.9%, respectively; the removal rates of PFC were 32.3%, 23.3% and 32.9%, respectively.PAC in the coagulation process, the electric neutralization Dominated PFC in the coagulation process, the adsorption bridging and electric neutralization at the same time play a role.Coagulation - adsorption combined treatment of the Yellow River water samples, the removal rate of organic matter with coagulant and adsorbent dosage increases But increased.After the first coagulation adsorption process UV254 and DOC removal effect is better than after the first adsorption coagulation process.First use of PAC coagulation The removal rates of UV254 and DOC on adsorption were 95.2% and 99.9%, respectively. For PFC, the removal rates of UV254 and DOC after coagulation were 90.1% and 99.9%, respectively. However, Settling performance, and the treated effluent is better than the former in maintaining the effect of disinfection.