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Preparation of Fe3O4-octadecyltrichlorosilane for Removal of Methyl Orange and Methylene Blue: Influence of pH and Ionic Strength on Competitive Adsorption
Hu Yaoqiang1,2; Quan Chaoming1,3; Guo Min1,3; Ye Xiushen1,3; Wu Zhijian1,3
2017-12-01
Source PublicationJOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
Volume32Issue:6Pages:1413-1419
SubtypeArticle
AbstractFe3O4-octadecyltrichlorosilane (Fe3O4-OTS) was synthesized and used to remove dyes in a competitive system. Fe3O4-OTS was prepared by slow hydrolysis of OTS in cyclohexane on the surface of Fe3O4 obtained through coprecipitation method. Scanning electron microscope (SEM), energy dispersive spectrometer (EDS), and contact angle analyzer (CA) were used to analyze the properties of Fe3O4-OTS. Methyl orange (MO) and methylene blue (MB) were selected as model molecules to study the influence mechanism of pH and ionic strength on competitive adsorption. The results of EDS and CA indicated that Fe3O4 was modified successfully with OTS on the surface. Silicon appeared and carbon content increased obviously on the surface of adsorbent. Contact angle of adsorbent increased from 0 degrees to 107 degrees after being modified by OTS. Fe3O4-OTS showed good separation for MO and MB in competitive system, which has potential to separate dyes in sewage. Separation factor (beta(O)(B)) changed from 18.724 to 0.017, when pH changed from 7 to 12, revealing that MO and MB could be separated almost thoroughly by Fe3O4-OTS. pH could change the surface charge of Fe3O4-OTS and structure of dyes, and thus change the interactions of competitive system indirectly. Even though hydrophobic interaction was enhanced, ionic strength reduced the difference of electrostatic interaction between dyes and Fe3O4-OTS. So it is unfavorable to separate dyes with opposite charges when ionic strength increases. These findings may provide theoretical guidances to separate two-component dye pollutants.
KeywordFe3o4-octadecyltrichlorosilane Competitive Adsorption Mechanism Ph Ionic Strength Dye
WOS HeadingsScience & Technology ; Technology
WOS KeywordAQUEOUS-SOLUTION ; DYE ADSORPTION ; RHODAMINE-B ; OCTADECYLTRICHLOROSILANE ; SORPTION ; SBA-15 ; WATER
Indexed BySCI
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000423285700026
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6377
Collection青海盐湖研究所知识仓储
盐湖资源与化学实验室
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Qinghai, Peoples R China
2.Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China
3.Key Lab Salt Lake Resources Chem Qinghai Prov, Xining 810008, Qinghai, Peoples R China
Recommended Citation
GB/T 7714
Hu Yaoqiang,Quan Chaoming,Guo Min,et al. Preparation of Fe3O4-octadecyltrichlorosilane for Removal of Methyl Orange and Methylene Blue: Influence of pH and Ionic Strength on Competitive Adsorption[J]. JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION,2017,32(6):1413-1419.
APA Hu Yaoqiang,Quan Chaoming,Guo Min,Ye Xiushen,&Wu Zhijian.(2017).Preparation of Fe3O4-octadecyltrichlorosilane for Removal of Methyl Orange and Methylene Blue: Influence of pH and Ionic Strength on Competitive Adsorption.JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION,32(6),1413-1419.
MLA Hu Yaoqiang,et al."Preparation of Fe3O4-octadecyltrichlorosilane for Removal of Methyl Orange and Methylene Blue: Influence of pH and Ionic Strength on Competitive Adsorption".JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION 32.6(2017):1413-1419.
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