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1. Coagulation performance and residual aluminum speciation of Al2(SO4)3 and polyaluminum chloride (PAC) in Yellow River water treatment | |||
Yang Zhonglian,Gao Baoyu,Yue Qinyan | |||
Environmental Science and Techology 08 April 2010 | |||
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Abstract:The effect of pH and coagulant dosage on the coagulation performance of Al2(SO4)3 and PAC with respect to the treatment of Yellow River water was investigated in this paper and the separation and measurement of residual aluminum speciation were also conducted. The results indicated that PAC showed superior coagulation performance compared to that of Al2(SO4)3 during the Yellow River water treatment. At a dosage of 15 mg/L, PAC achieved an optimum removal efficiency of turbidity, UV254 and DOC of 96.3%, 57.1%, 32.7%, respectively and Al2(SO4)3 also achieved an optimum removal efficiency of turbidity, UV254 and DOC of 94.5%, 53.5% 34.8%, respectively. For PAC and Al2 (SO4)3, the optimum pH during the treatment of Yellow River water could be determined at 6.0. Different residual aluminum speciation exhibited different trends with dosage and pH variation. For the two coagulants, no matter under different dosage or under different pH, the majority of residual total aluminum existed most in the form of total dissolved Al, among which, dissolved organically-bound Al was the predominant speciation. Dissolved inorganically-bound monomeric Al was the main component in dissolved monomeric Al. PAC showed lower concentration for the several kinds of residual aluminum species; except the dissolved organically-bound Al and PAC could effectively reduce the concentration of dissolved monomeric Al. | |||
TO cite this article:Yang Zhonglian,Gao Baoyu,Yue Qinyan. Coagulation performance and residual aluminum speciation of Al2(SO4)3 and polyaluminum chloride (PAC) in Yellow River water treatment[OL].[ 8 April 2010] http://en.paper.edu.cn/en_releasepaper/content/41721 |
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