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题名:
A functionalized hybrid silicate adsorbent derived from naturally abundant low-grade palygorskite clay for highly efficient removal of hazardous antibiotics
作者: Tian GY(田光燕)1,2,3; Wang WB(王文波)1,3; Zong L(宗莉)1,3; Kang YR(康玉茹)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::功能复合材料 ; 环境材料与生态化学::材料学
关键词: Palygorskite ; Hybrid silicate adsorbent ; Hydrothermal ; Adsorption ; Antibiotics
刊名: Chemical Engineering Journal
DOI: 10.1016/j.cej.2016.02.035
ISSN号: 1385-8947
发表日期: 2016
卷: 293, 页:376-385
收录类别: SCI
英文摘要:

As promising eco-friendly materials, natural silicates have received great attention as abundant, low-cost, non-toxic, stable, and environmentally benign adsorbents. Inspired by the idea of “from nature, for nature”, a series of highly efficient hybrid silicate adsorbents were synthesized via a simple one-step hydrothermal process, using naturally abundant low-grade palygorskite (PAL) as the initial material in the presence of sodium silicate (SS), magnesium sulfate (MS), and monochloroacetic acid (MCA). As expected, the PAL crystal and the associated minerals were restructured as amorphous and multi-porous Mg, Al-silicates, while the active single bondCOOH groups were simultaneously introduced into the silicate to form a hybrid adsorbent with a specific surface area of 410.61 m2/g (compared to 52.87 m2/g for raw PAL). The hybrid silicate adsorbent showed excellent adsorption capabilities for the antibiotics chlortetracycline (CTC) (329.84 mg/g) and oxytetracycline (OTC) (207.47 mg/g), which were enhanced by 218.9% and 107.9%, respectively, in contrast to that of raw PAL. The adsorption of the hybrid adsorbent for CTC and OTC was pH-dependent, and the pH values of 3.56–7.82 (for CTC) and 3.45–7.57 (for OTC) favored the adsorption. The dynamic adsorption process was well described by a pseudo second-order model, which suggested that chemical adsorption was the prominent driving force. The thermodynamic adsorption pattern agreed well with the Redlich–Peterson model, revealing that the heterogeneous surface was the main adsorption site and that removal of antibiotics occurred mainly by multi-layer adsorption.

资助者: National Natural Science Foundation of China (No. 51403221;21377135);“863” Project of the Ministry of Science and Technology, People’s Republic of China (No. 2013AA032003);Jiangsu Provincial Joint Innovation and Research Funding of Enterprises, Colleges and Institutes—Prospective Cooperative Research Project (No. BY2015056-01)
语种: 英语
影响因子: 6.216
兰州化物所论文排名: 第一作者单位
WOS记录号: WOS:000374602600040
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.licp.ac.cn/handle/362003/19557
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:
Tian GY,Wang WB,Zong L,et al. A functionalized hybrid silicate adsorbent derived from naturally abundant low-grade palygorskite clay for highly efficient removal of hazardous antibiotics[J]. Chemical Engineering Journal,2016-01-01,293:376-385.
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