A simple hydrothermal approach to modify palygorskite for high-efficient adsorption of Methylene blue and Cu(II) ions | |
Department | 环境材料与生态化学研究发展中心 |
Wang WB(王文波)1; Tian GY(田光燕)1,2; Zhang ZF(张志芳)1,2; Wang AQ(王爱勤)1,3; Wang AQ(王爱勤) | |
2015 | |
Source Publication | Chemical Engineering Journal |
ISSN | 1385-8947 |
Volume | 265Pages:228-238 |
Abstract | Silicate materials have been frequently used as stable, low-cost and efficient adsorbents for the removal of dyes and heavy metal ions from aqueous solution. Herein, at the aim of designing new adsorbent with higher adsorption capacity, natural palygorskite (PAL) was modified via a one-step hydrothermal process by introducing sodium silicate and magnesium salts. The effect of Si/Mg dosage ratio on the structure and physico-chemical features of the adsorbent was investigated, and its adsorption capability for Methylene blue (MB) and Cu(II) ions was intensively evaluated. It was found that Si/Mg dosage ratio is the key to control the adsorption properties of the adsorbent. The active magnesium silicate could be formed around PAL at the moderate Si/Mg dosage ratio, and even the undesirable quartz impurities without adsorption activity in the natural PAL minerals may transform as amorphous magnesium silicate with higher adsorption activity in this process. The adsorbent shows greater BET specific surface areas (407.3 m2/g), ideal surface charge distribution and superior adsorption capacity to MB and Cu(II) ions, with the maximum adsorption capacity of 527.22 mg/g for MB and 210.64 mg/g for Cu(II) ions at the Si/Mg dosage ratio of 2:1. The MB molecules and Cu(II) ion could be almost completely removed from 100 mg/L of MB solution and 25 mg/L of Cu(II) solution by the adsorbent, respectively, which is far away higher than that of raw PAL. The electrostatic attraction, ion exchange and chemical association of –Si–O_ groups contribute to the enhanced adsorption for MB or Cu(II) ions. |
Keyword | Palygorskite Magnesium Silicate Methylene Blue Heavy Metal Adsorption |
Subject Area | 环境材料与生态化学 |
DOI | 10.1016/j.cej.2014.11.135 |
Funding Organization | ‘‘863’’ Project of the Ministry of Science and Technology, P.R. China (No. 2013AA032003);National Natural Science Foundation of China (No. 51403221);the West Light Foundation of The Chinese Academy of Sciences (The Science Development Talent Teach words [2012] No. 179) |
Indexed By | SCI |
If | 4.321 |
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/362003/7212 |
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, 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 Attapulgite Appl Technol, Xuyi 211700, Peoples R China |
Recommended Citation GB/T 7714 | Wang WB,Tian GY,Zhang ZF,et al. A simple hydrothermal approach to modify palygorskite for high-efficient adsorption of Methylene blue and Cu(II) ions[J]. Chemical Engineering Journal,2015,265:228-238. |
APA | Wang WB,Tian GY,Zhang ZF,Wang AQ,&王爱勤.(2015).A simple hydrothermal approach to modify palygorskite for high-efficient adsorption of Methylene blue and Cu(II) ions.Chemical Engineering Journal,265,228-238. |
MLA | Wang WB,et al."A simple hydrothermal approach to modify palygorskite for high-efficient adsorption of Methylene blue and Cu(II) ions".Chemical Engineering Journal 265(2015):228-238. |
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