From naturally low-grade palygorskite to hybrid silicate adsorbent for efficient capture of Cu(II) ions | |
Department | 环境材料与生态化学研究发展中心 |
Wang WB(王文波)1,3; 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) | |
2016 | |
Source Publication | Applied Clay Science |
ISSN | 0169-1317 |
Volume | 132Pages:438-448 |
Abstract | A new eco-friendly hybrid Mg, Al-silicate adsorbent with superior adsorption properties for Cu(II) was prepared by a one-step hydrothermal process using earth-abundant low-grade palygorskite (PAL) as the starting materials and non-toxic sodium carbonate as the assistant. The structural characterizations by scanning electronic microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), BET adsorption-desorption isotherms and Zeta potential analyses confirm that part of rod-like PAL crystals were in-situ transformed as smectite sheets, and the hybrid silicate adsorbents with rod/sheet transition formulation were formed. Under the action of alkaline, some inert SiOSi(or M) bonds were broken as –Si–O− groups, which not only make the adsorbent having extremely negative surface charge (− 46.4 mV), but also strengthen the chelating and holding capability of the adsorbent to Cu(II). The silicate adsorbent shows high adsorption capacity of 229.9 mg/g for Cu(II), which can capture 98.95% of Cu(II) from 200 mg/L of Cu(II) solution at the dosage of 2.6 g/L (only 64.5% for raw PAL). The intensified electrostatic attraction, ion-exchange, and chemical association of Si-O− surface groups with Cu(II) primarily contribute to the improved capture capability for Cu(II). |
Keyword | Palygorskite Hydrothermal Hybrid Silicate Adsorbent Adsorption Heavy Metal |
Subject Area | 功能复合材料 ; 材料学 ; 矿物学 |
DOI | 10.1016/j.clay.2016.07.013 |
Funding Organization | the National Natural Science Foundation of China (No. 51403221;21377135);“863” Project of the Chinese Ministry of Science and Technology (No. 2013AA032003);the key R & D program of Huai'an Science and Technology Bureau (HAG2015082);the open fund of the Xuyi Center of Palygorskite Applied Technology Research Development & Industrialization of CAS in China |
Indexed By | SCI |
If | 3.101 |
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/362003/20241 |
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, Ctr Xuyi Palygorskite Appl Technol, Xuyi 211700, Peoples R China |
Recommended Citation GB/T 7714 | Wang WB,Tian GY,Zhang ZF,et al. From naturally low-grade palygorskite to hybrid silicate adsorbent for efficient capture of Cu(II) ions[J]. Applied Clay Science,2016,132:438-448. |
APA | Wang WB,Tian GY,Zhang ZF,Wang AQ,&王爱勤.(2016).From naturally low-grade palygorskite to hybrid silicate adsorbent for efficient capture of Cu(II) ions.Applied Clay Science,132,438-448. |
MLA | Wang WB,et al."From naturally low-grade palygorskite to hybrid silicate adsorbent for efficient capture of Cu(II) ions".Applied Clay Science 132(2016):438-448. |
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