Comparative study of floc characteristics with titanium tetrachloride against conventional coagulants: Effect of coagulant dose, solution pH, shear force and break-up period

被引：24

作者：

Zhao, Y. X. ^{[1
]}

Gao, B. Y. ^{[1
]}

Zhang, G. Z. ^{[1
]}

Phuntsho, S. ^{[2
]}

Wang, Y. ^{[1
]}

Yue, Q. Y. ^{[1
]}

Li, Q. ^{[1
]}

Shon, H. K. ^{[2
]}

机构：

[1] Shandong Univ, Sch Environm Sci & Engn, Shandong Key Lab Water Pollut Control & Resource, Jinan 250100, Peoples R China

[2] Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Technol Water & Wastewater, Broadway, NSW 2007, Australia

来源：

CHEMICAL ENGINEERING JOURNAL | 2013年 / 233卷

关键词：

Coagulation-flocculation; Titanium tetrachloride; Floc characteristics; Solution pH; Shear force; Break-up period; WASTE-WATER; TICL4; FLOCCULATION; DIOXIDE TIO2; STRENGTH; SALTS; ALUM; SIZE; PHOTOCATALYSIS; SUSPENSIONS; MORPHOLOGY;

D O I：

10.1016/j.cej.2013.08.017

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Characteristics of flocs formed by titanium tetrachloride (TiCl4), ferric chloride (FeCl3) and aluminum sulfate (Al-2(SO4)(3)) were comparatively investigated in terms of floc growth rate, size, strength, recoverability and fractal dimension in real water treatment. Impacts of coagulant dose, solution pH and hydraulic conditions, including shear force and break-up period, on floc properties were investigated. Results showed that the floc size followed the order of TiCl4 > FeCl3 > Al-2(SO4)(3) within the dose range investigated. The response of floc strength to coagulant dose depended on the coagulant used, while the floc recoverability decreased with the increasing dose regardless of the coagulant used. Within the solution pH range investigated, the floc strength and recoverability showed the following order of Al-2(SO4)(3) > FeCl3 > TiCl4 and those of TiCl4 were the least affected by solution pH. Additionally, the floc strength decayed with the increasing shear force and break-up period for the three coagulants. TiCl4 yielded the flocs with the weakest recoverability within both the shear force and break-up period ranges investigated. Moreover, the floc compactness followed the order of FeCl3 > TiCl4 > Al-2(SO4)(3) under either shear force condition. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：70 / 79

页数：10

共 39 条

[1] Microscopic observation of particle reduction in slaughterhouse wastewater by coagulation-flocculation using ferric sulphate as coagulant and different coagulant aids [J].