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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
发表期刊JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
卷号32期号:6页码:1413-1419
文章类型Article
摘要Fe3O4-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.
关键词Fe3o4-octadecyltrichlorosilane Competitive Adsorption Mechanism Ph Ionic Strength Dye
WOS标题词Science & Technology ; Technology
关键词[WOS]AQUEOUS-SOLUTION ; DYE ADSORPTION ; RHODAMINE-B ; OCTADECYLTRICHLOROSILANE ; SORPTION ; SBA-15 ; WATER
收录类别SCI
语种英语
WOS研究方向Materials Science
WOS类目Materials Science, Multidisciplinary
WOS记录号WOS:000423285700026
引用统计
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/6377
专题青海盐湖研究所知识仓储
盐湖资源与化学实验室
作者单位1.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
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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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