Performance and mechanism of polyferric-quaternary ammonium salt composite flocculants in treating high organic matter and high alkalinity surface water

被引：64
|
作者：
Wei, J. C. [1 ]
Gao, B. Y. [1 ]
Yue, Q. Y. [1 ]
Wang, Y. [1 ,2 ]
Lu, L. [1 ]
机构：
[1] Shandong Univ, Sch Environm Sci & Engn, Jinan 250100, Peoples R China
[2] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 165卷 / 1-3期
基金：
中国国家自然科学基金;
关键词：
Composite flocculant; Surface water treatment; Coagulation mechanism; HUMIC SUBSTANCES; DRINKING-WATER; COAGULATION; POLYELECTROLYTES; ALUMINUM; REMOVAL; POLYMERS; KINETICS; CHARACTER; CHEMISTRY;
D O I：
10.1016/j.jhazmat.2008.10.069
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A series of composite flocculants PFC-PD with different basicity (B) of polyferric chloride (PFC), different weight percentage (w(P)) and intrinsic viscosity (eta) of polydimethyl diallylammonium chloride (PDMDAAC) were prepared by prepolymerization. The turbidity, dissolved organic carbon (DOC) and specific ultraviolet absorbance (SUVA) removal efficiency as well as flocculation mechanism of PFC-PD were compared with that of PFC, PDMDAAC and Successive addition of PFC and PDMDAAC in treating high DOC and high alkalinity surface water by jar tests. The effect of B, w(P) and eta on coagulation efficiency and mechanisms were also studied. The experimental results showed that PFC-PD was more efficient and more applicable for turbidity, DOC and SUVA removal than PFC, PDMDAAC and successive addition of PFC and PDMDAAC. Further, the water pH was slightly depressed by PFC-PD. Coagulation efficiency of PFC-PD was improved at lower B, larger w(P) and larger eta. Charge neutralization was dominant mechanism of PFC-PD. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：789 / 795
页数：7
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