Preparation of Fe3O4-octadecyltrichlorosilane for Removal of Methyl Orange and Methylene Blue: Influence of pH and Ionic Strength on Competitive Adsorption
文献类型：期刊论文
| 作者 | Hu Yaoqiang1,2; Quan Chaoming1,3; Guo Min1,3 ; Ye Xiushen1,3; Wu Zhijian1,3
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| 刊名 | JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
 |
| 出版日期 | 2017-12-01 |
| 卷号 | 32期号:6页码:1413-1419 |
| 关键词 | Fe3o4-octadecyltrichlorosilane Competitive Adsorption Mechanism Ph Ionic Strength Dye |
| 文献子类 | Article |
| 英文摘要 | 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. |
| WOS关键词 | AQUEOUS-SOLUTION ; DYE ADSORPTION ; RHODAMINE-B ; OCTADECYLTRICHLOROSILANE ; SORPTION ; SBA-15 ; WATER |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000423285700026 |
| 源URL | [http://ir.isl.ac.cn/handle/363002/6377]  |
| 专题 | 青海盐湖研究所_青海盐湖研究所知识仓储 青海盐湖研究所_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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：青海盐湖研究所
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