title: Effects of solution pH and synthetic method on destabilization process of polytitanium-silicate-chloride.
abstract: Effect of solution pH on coagulation performance and flock properties of a novel inorganic polymer coagulant-polytitanium-silicate-chloride (PTSC) in humic acid-kaolin water treatment was investigated in this work. PTSC was synthesized by two approaches: composite and co-complexion, denoted as PTSCm and PTSCc respectively. The effect of the synthetic method was also considered. Results indicated that turbidity and DOM removal were improved by addition of polysilicic acid, especially under acidic condition. PTSCc achieved slightly better DOM removal than that of PTSCm. Flocks formed under acidic condition was smaller than those form under alkaline condition. In addition, flocks formed by PTSCc were larger than PTSCm flocks. Results also indicated that flock strength and recovery ability was slightly improved by the addition of PSiA. Moreover, under acidic condition, PTSC flocks had larger fractal dimension with more compact structure, especially for PTSCm flocks. In contrast, they were looser compared with PTC flock, especially for PTSCm flocks under neutral and alkaline conditions.
authors.affiliation: School of Environmental Science and Engineering, Shandong University, No. 27 Shanda Nanlu, Jinan 250100, Shandong, PR China.
authors.forename: Xin
authors.initials: X
authors.lastname: Huang
authors.affiliation: School of Environmental Science and Engineering, Shandong University, No. 27 Shanda Nanlu, Jinan 250100, Shandong, PR China. Electronic address: baoyugao_sdu@aliyun.com.
authors.forename: Baoyu
authors.initials: B
authors.lastname: Gao
authors.affiliation: School of Environmental Science and Engineering, Shandong University, No. 27 Shanda Nanlu, Jinan 250100, Shandong, PR China.
authors.forename: Yangyang
authors.initials: Y
authors.lastname: Sun
authors.affiliation: School of Environmental Science and Engineering, Shandong University, No. 27 Shanda Nanlu, Jinan 250100, Shandong, PR China.
authors.forename: Qinyan
authors.initials: Q
authors.lastname: Yue
authors.affiliation: School of Environmental Science and Engineering, Shandong University, No. 27 Shanda Nanlu, Jinan 250100, Shandong, PR China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.affiliation: School of Environmental Science and Engineering, Shandong University, No. 27 Shanda Nanlu, Jinan 250100, Shandong, PR China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Li
keywords: Flocculant; Flock properties; NOM removal; Polytitanium-silicate-chloride; Solution pH