Fabrication of fungus/attapulgite composites and their removal of U(VI) from aqueous solution

被引：129
作者：
Cheng, Wencai [1 ,2 ]
Ding, Congcong [1 ,3 ]
Sun, Yubing [1 ,4 ]
Wang, Xiangke [5 ,6 ]
机构：
[1] Chinese Acad Sci, Inst Plasma Phys, Key Lab Novel Thin Film Solar Cells, Hefei 230031, Peoples R China
[2] Sichuan Univ, Minist Educ, Coll Life Sci, Key Lab Biol Resource & Ecol Environm, Chengdu 610064, Peoples R China
[3] Univ Sci & Technol China, Hefei 230000, Peoples R China
[4] Soochow Univ, Sch Radiol & Interdisciplinary Sci, Collaborat Innovat Ctr Radiat Med, Jiangsu Higher Educ Inst, Suzhou 215123, Peoples R China
[5] North China Elect Power Univ, Sch Environm & Chem Engn, Beijing 102206, Peoples R China
[6] King Abdulaziz Univ, Fac Engn, Jeddah 21589, Saudi Arabia
来源：
CHEMICAL ENGINEERING JOURNAL | 2015年 / 269卷
基金：
中国国家自然科学基金;
关键词：
Removal; U(VI); Hydrothermal; Fungi; Attapulgite; GRAPHENE OXIDE NANOSHEETS; HOLLOW CARBONACEOUS MICROSPHERES; FIXED-BED COLUMN; HYDROTHERMAL CARBONIZATION; MAGNETIC NANOPARTICLES; EFFICIENT ENRICHMENT; MODELING TECHNIQUES; SORPTION; ADSORPTION; EU(III);
D O I：
10.1016/j.cej.2015.01.096
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A new adsorbent of fungus/attapulgite (F/ATP) composites was synthesized by one-pot hydrothermal carbonization method under mild conditions and characterized by scanning electron microscope, X-ray diffraction, thermogravimetric analysis and Fourier transform infrared spectroscopy. The characterized results showed that the fungus (Geotrichum sp. dwc-1) can be as a superior template for the assembly of nanoscale attapulgite by covalent bonding. According to batch experiments, the maximum sorption capacity of F/ATP for U(VI) was 125 mg/g at pH 4.0 and T = 303 K. The thermodynamic parameters calculated from sorption isotherms showed that U(VI) sorption on F/ATP was a spontaneous and endothermic process. The fixed-bed column experiment further demonstrated that F/ATP presented the excellent adsorption performance. It was determined from regeneration experiments that the F/ATP composites exhibited high sorption of U(VI) (similar to 91%) over six cycles. Therefore, F/ATP can be as a promising candidate for the removal of U(VI) from aqueous solution due to its low-cost, sustainable, and efficient feature. (C) 2015 Elsevier B.V. All rights reserved.
引用
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页码：1 / 8
页数：8
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