Enhanced adsorptive removal of methylene blue from aqueous solution by alkali-activated palygorskite | |
Department | 环境材料与生态化学研究发展中心 |
Wang WB(王文波)1,2; Wang FF(王方方)1; Kang YR(康玉茹)1; Wang AQ(王爱勤)1,2; Wang AQ(王爱勤) | |
2015 | |
Source Publication | Water Air and Soil Pollution |
ISSN | 0049-6979 |
Volume | 226Issue:3Pages:83(1-13) |
Abstract | Silicate clay materials are promising natural adsorbents with abundant, low cost, stable, and ecofriendly advantages, but the limited adsorption capacity restricts their applications in many fields. Herein, palygorskite (PAL) was facilely activated with alkali to enhance its adsorptive removal capability for methylene blue (MB). The effects of alkali activation on the microstructure, physicochemical, and adsorption properties of PAL for MB were intensively investigated. It was found that the moderate alkali activation can partially remove the metal cations (i.e., Al3+, Mg2+) and Si in the crystal backbone of PAL by which new Badsorption sites^ were created and the surface negative charges increased. The adsorption capacity and rate of PAL for MB were evidently enhanced due to the effective activation. The adsorption isotherms were described by Freundlich isotherm model very well, and the adsorption kinetics can be accurately presented by a pseudo-second-order model. It can be inferred from the fitting results that the overall adsorption process was controlled by external mass transfer and intra-particle diffusion (the dominant role). The multiple adsorption interactions (hydrogen bonding, electrostatic interactions, mesopore filling, and complexing) were turned out to be the dominant factors to improve the adsorption properties. It was revealed that the activated PAL could be used as a potential adsorption candidate for environmental applications. |
Keyword | Palygorskite Alkali Activation Adsorption Methylene Blue |
Subject Area | 环境材料与生态化学 |
DOI | 10.1007/s11270-015-2355-0 |
Funding Organization | “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);the open funds of Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province (No. HPK201201) |
Indexed By | SCI |
If | 1.554 |
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/362003/7213 |
Collection | 环境材料与生态化学研究发展中心 |
Corresponding Author | Wang AQ(王爱勤) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, R&D Ctr Xuyi Attapulgite Appl Technol, Xuyi 211700, Peoples R China 2.Huaiyin Inst Technol, Key Lab Palygorskite Sci & Appl Technol Jiangsu P, Huaian 223003, Peoples R China |
Recommended Citation GB/T 7714 | Wang WB,Wang FF,Kang YR,et al. Enhanced adsorptive removal of methylene blue from aqueous solution by alkali-activated palygorskite[J]. Water Air and Soil Pollution,2015,226(3):83(1-13). |
APA | Wang WB,Wang FF,Kang YR,Wang AQ,&王爱勤.(2015).Enhanced adsorptive removal of methylene blue from aqueous solution by alkali-activated palygorskite.Water Air and Soil Pollution,226(3),83(1-13). |
MLA | Wang WB,et al."Enhanced adsorptive removal of methylene blue from aqueous solution by alkali-activated palygorskite".Water Air and Soil Pollution 226.3(2015):83(1-13). |
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