Ammonium sulfide-assisted hydrothermal activation of palygorskite for enhanced adsorption of methyl violet | |
Department | 环境材料与生态化学研究发展中心 |
Tian GY(田光燕)1,2; Wang WB(王文波)1,3; Kang YR(康玉茹)1,3; Wang AQ(王爱勤)1,3; Tian GY(田光燕); Wang AQ(王爱勤) | |
2016 | |
Source Publication | Journal of Environmental Sciences |
ISSN | 1001-0742 |
Volume | 41Pages:33-43 |
Abstract | Herein, palygorskite (PAL) was activated via a simple hydrothermal process in the presence of ammonium sulfide, and the effects of activation on the microstructure, physico-chemical feature and adsorption behaviors of PAL were intensively investigated. The hydrothermal process evidently improved the dispersion of PAL crystal bundles, increased surface negative charges and built more active –Si–O− groups served as the new “adsorption sites”. The adsorption property of the activated PAL for Methyl Violet (MV) was systematically investigated by optimizing the adsorption variables, including pH, ionic strength, contact time and initial MV concentration. The activated PAL exhibited a superior adsorption capability to the raw PAL for the removal of MV (from 156.05 to 218.11 mg/g). The kinetics for MV adsorption followed pseudo second-order kinetic models, while the isotherm and thermodynamics results showed that the adsorption pattern well followed the Langmuir model. The structure analysis of PAL before and after adsorption demonstrated that electrostatic interaction and chemical association of –X–O− are the prominent driving forces for the adsorption process. |
Keyword | Palygorskite Hydrothermal Adsorption Methyl Violet |
Subject Area | 环境材料与生态化学 |
DOI | 10.1016/j.jes.2015.03.036 |
Funding Organization | the “863” Project of the Ministry of Science and Technology, People's Republic of China (No. 2013AA032003);the National Natural Science Foundation of China (No. 51403221) |
Indexed By | SCI |
If | 2.937 |
Language | 英语 |
Funding Project | 功能复合材料组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/19426 |
Collection | 环境材料与生态化学研究发展中心 |
Corresponding Author | Tian GY(田光燕); Wang AQ(王爱勤) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Ecomat & Green Chem, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Lanzhou Inst Chem Phys, R&D Ctr Xuyi Palygorskite Appl Technol, Xuyi 211700, Peoples R China |
Recommended Citation GB/T 7714 | Tian GY,Wang WB,Kang YR,et al. Ammonium sulfide-assisted hydrothermal activation of palygorskite for enhanced adsorption of methyl violet[J]. Journal of Environmental Sciences,2016,41:33-43. |
APA | Tian GY,Wang WB,Kang YR,Wang AQ,田光燕,&王爱勤.(2016).Ammonium sulfide-assisted hydrothermal activation of palygorskite for enhanced adsorption of methyl violet.Journal of Environmental Sciences,41,33-43. |
MLA | Tian GY,et al."Ammonium sulfide-assisted hydrothermal activation of palygorskite for enhanced adsorption of methyl violet".Journal of Environmental Sciences 41(2016):33-43. |
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