CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
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
2015-09-20
Source PublicationCOLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN0927-7757
Volume481Issue:SEPPages:1-6
Abstract

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.

KeywordHigh-alumina Fly Ash Potentiometric Titration Low-concentration Colloidal Silica Metal Cations
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.colsurfa.2015.04.024
Indexed BySCI
Language英语
WOS KeywordRHEOLOGICAL BEHAVIOR ; LAPONITE DISPERSIONS ; HUMIC-ACID ; STABILITY ; SUSPENSIONS ; SOL ; PARTICLES ; CALCIUM ; PH
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000360407700001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19517
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.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
Recommended Citation
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.
Files in This Item:
File Name/Size DocType Version Access License
Effects of metal ion(1409KB)期刊论文出版稿限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhang, Jianbo]'s Articles
[Li, Huiquan]'s Articles
[Li, Shaopeng]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhang, Jianbo]'s Articles
[Li, Huiquan]'s Articles
[Li, Shaopeng]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhang, Jianbo]'s Articles
[Li, Huiquan]'s Articles
[Li, Shaopeng]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.