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题名:
Glycine-assisted evolution of palygorskite via a one-step hydrothermal process to give an efficient adsorbent for capturing Pb(II) ions
作者: Zhang ZF(张志芳)1,2; Wang WB(王文波)1,3; Kang YR(康玉茹)1,3; Zong L(宗莉)1,3; Wang AQ(王爱勤)1,3
所属部门: 环境材料与生态化学研究发展中心
所属课题: 功能复合材料组
通讯作者: 王爱勤 ; 王文波
学科分类: 环境材料与生态化学
关键词: Palygorskite ; Glycine ; structure evolution ; Hydrothermal ; Adsorption
刊名: RSC Advances
DOI: 10.1039/c5ra17724c
ISSN号: 2046-2069
发表日期: 2015
卷: 5, 期:117, 页:96829-96839
收录类别: SCI
英文摘要: As the materials of “green 21st century material worlds”, natural silicates have received unprecedented attention by virtue of their abundance, low-cost, stability, and non-toxic and eco-friendly nature compared to other synthetic materials. With the aim to develop a new hybrid silicate adsorbent with improved adsorption properties, the naturally abundant palygorskite (PAL) was functionalized with glycine (GLY) via a simple one-step hydrothermal process and used for capturing Pb(II) ions from aqueous solution. The main reaction parameters, e.g., the pH values of the reaction medium, solid-to-liquid ratio, reaction time and dosage of GLY, were systematically optimized, and the as-prepared adsorbent was characterized using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmittance electronic microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR) techniques. The results reveal that the PAL crystal was converted to a hybrid silicate material with the assistance of GLY, and simultaneously the functional groups were introduced during the hydrothermal reaction, which caused an evident enhancement in the adsorption capacity of PAL for Pb(II) ions from 55.76 mg g1 to 123.24 mg g1. Almost 99.60% of Pb(II) could be captured and removed from a 40 mg L1 Pb(II) solution using the as-prepared GLY-PAL silicate adsorbent, which is obviously higher than the 83.85% achieved by raw PAL. The intensified complexation of the functional groups on the silicate with Pb(II), the electrostatic attraction and the pore adsorption are responsible for the enhancement in the adsorption capability.
资助者: National Natural Science Foundation of China (NO. 21377135;51403221);“863” Project of the Ministry of Science and Technology, P. R. China (No. 2013AA032003)
语种: 英语
影响因子: 3.840
兰州化物所论文排名: 第一作者单位
WOS记录号: WOS:000364907500071
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.licp.ac.cn/handle/362003/18730
Appears in Collections:环境材料与生态化学研究发展中心_期刊论文

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作者单位: 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:
Zhang ZF,Wang WB,Kang YR,et al. Glycine-assisted evolution of palygorskite via a one-step hydrothermal process to give an efficient adsorbent for capturing Pb(II) ions[J]. RSC Advances,2015-01-01,5(117):96829-96839.
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