The characteristics of flocs and zeta potential in nano-TiO2 system under different coagulation conditions
作者： H. Xu , W. Jiang , F. Xiao , D.S. Wang
DOI: 10.1016/J.COLSURFA.2014.03.073
关键词:
摘要: Three coagulants were used to investigate the characteristics of flocs formed in TiO2 system, and effects humic acid (HA) on coagulation process also investigated. The results indicated that could not regrow former size all conditions. floc sizes after re-growth decreased with increasing breakage period. Polyacrylamide (PAM) significantly increase size, fractal dimension concentration N-PAM. Zeta potentials without N-PAM as coagulant when broken at 400 rpm. potential using flocculant did change during period, this maybe caused by adsorption molecules new exposed surfaces. nano-Al2O3 + AS showed particles recovery factor was larger than only AS. further addition Ca2+ Al2O3 enhance regrowth. In enhanced (Al 1.0 mmol/L), PACI produce due electrostatic patch effects. (C) 2014 Elsevier B.V. All rights reserved.
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