Effects of metal ions with different valences on colloidal aggregation in low-concentration silica colloidal systems characterized by continuous online zeta potential analysis | |
Zhang, Jianbo1,2; Li, Huiquan1; Li, Shaopeng2; Hou, Xinjuan2 | |
刊名 | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2015-09-20 | |
卷号 | 481期号:SEP页码:1-6 |
关键词 | High-alumina fly ash Potentiometric titration Low-concentration colloidal silica Metal cations |
ISSN号 | 0927-7757 |
英文摘要 | In the removal of silicate and impurities in the acid treatment of high-alumina fly ash, the transition from silica sol to gel in the presence of metal cations has a major role in filtration and product quality. In this work, an online physical analysis method that can continuously measure zeta potential, pH, and viscosity is established for low-concentration colloidal systems. The change in zeta potential can be explained by Derjaguin.Landau.Verwey.Overbeek (DLVO) theory and model of electric double layer, which is verified by the morphology of colloids in different periods. The influences of metal cations with different valences and contents on the transition from silica sol to gel are investigated in detail. Results show that trivalent ions have a positive role in the delayed coagulation because of their hydrolysis and complexation in relatively low concentrations. By contrast, divalent and monovalent ions have a negative role in the transition from sol to gel because of the bridging effect. In terms of concentration, divalent ions have greater influence on the transition from sol to gel than monovalent ions. This established method is adaptable for the analysis of a low-concentration colloidal system and could be applied in the acid treatment of silicon-containing solid wastes. (C) 2015 Elsevier B.V. All rights reserved. |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Chemistry, Physical |
研究领域[WOS] | Chemistry |
关键词[WOS] | RHEOLOGICAL BEHAVIOR ; LAPONITE DISPERSIONS ; HUMIC-ACID ; STABILITY ; SUSPENSIONS ; SOL ; PARTICLES ; CALCIUM ; PH |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000360407700001 |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/19517] ![]() |
专题 | 过程工程研究所_湿法冶金清洁生产技术国家工程实验室 |
作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100090, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Jianbo,Li, Huiquan,Li, Shaopeng,et al. Effects of metal ions with different valences on colloidal aggregation in low-concentration silica colloidal systems characterized by continuous online zeta potential analysis[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2015,481(SEP):1-6. |
APA | Zhang, Jianbo,Li, Huiquan,Li, Shaopeng,&Hou, Xinjuan.(2015).Effects of metal ions with different valences on colloidal aggregation in low-concentration silica colloidal systems characterized by continuous online zeta potential analysis.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,481(SEP),1-6. |
MLA | Zhang, Jianbo,et al."Effects of metal ions with different valences on colloidal aggregation in low-concentration silica colloidal systems characterized by continuous online zeta potential analysis".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 481.SEP(2015):1-6. |
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