Effects of fluoride on coagulation performance of aluminum chloride towards Kaolin suspension
文献类型：期刊论文
| 作者 | Liu, Ruiping ; Zhu, Lijun ; Gong, Wenxin ; Lan, Huachun ; Liu, Huijuan ; Qu, Jiuhui |
| 刊名 | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
 |
| 出版日期 | 2013 |
| 卷号 | 421期号:1页码:84-90 |
| 通讯作者 | Liu, HJ |
| 中文摘要 | Although many studies have investigated the removal of fluoride by aluminum (Al) coagulation, few studies focus on the effects of fluoride on the coagulation behaviors towards colloids such as kaolin suspensions. In this study the effects of fluoride at different molar ratios of fluoride to Al (R-F:Al) on turbidity removal, zeta potential, flocs growth, and residual Al levels were investigated by a series of batch experiments, and the Visual MINTEQ software was also used to illustrate the species distribution of Al and fluoride at different R-F:Al levels. In insufficient Al dose ranges, fluoride showed adverse effects at R-F:Al above 10:10, whereas fluoride exhibited little effect on coagulation at R-F:Al below 2:10 at pH < 8. At pH > 8, little effect was observed over wide R-F:Al ranges, from 1:10 to 30:30. The adverse effects of fluoride were related to decreased zeta potential, smaller flocs, and elevated levels of residual Al. At pH 6, the fluoride at R-F:Al of 10:10 contributed to the decrease of the zeta potential from -1.7 to -6.7 mV, decrease of floc size from 119.7 to 29.0 mu m, and increase of residual Al of 0.22 mg/L as Al. For the overdosed dose of 20 mg/L as Al, the presence of fluoride decreased residual turbidity from 22.7 to 20.6 NTU, owing to the lowered zeta potential and the inhibited re-stabilization of particles. Moreover, this study indicates that after adsorbing fluoride, the spent freshly-prepared aluminum hydroxides (in-situ Al2O3 center dot xH(2)O) may be reclaimed as coagulants for colloid removal after being dissolved by acid solution. This strategy is valuable to minimize the reagent cost for the removal of fluoride by in-situ Al2O3 center dot xH(2)O. (C) 2013 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS记录号 | WOS:000316369800010 |
| 公开日期 | 2014-06-06 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/7407]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Liu, Ruiping,Zhu, Lijun,Gong, Wenxin,et al. Effects of fluoride on coagulation performance of aluminum chloride towards Kaolin suspension[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2013,421(1):84-90. |
| APA | Liu, Ruiping,Zhu, Lijun,Gong, Wenxin,Lan, Huachun,Liu, Huijuan,&Qu, Jiuhui.(2013).Effects of fluoride on coagulation performance of aluminum chloride towards Kaolin suspension.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,421(1),84-90. |
| MLA | Liu, Ruiping,et al."Effects of fluoride on coagulation performance of aluminum chloride towards Kaolin suspension".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 421.1(2013):84-90. |
入库方式： OAI收割
来源：生态环境研究中心
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