Preparation of amino-Fe(III) functionalized mesoporous silica for synergistic adsorption of tetracycline and copper

被引:151
作者
Zhang, Ziyang [1 ,2 ]
Liu, Huijuan [1 ]
Wu, Liyuan [1 ]
Lan, Huachun [1 ]
Qu, Jiuhui [1 ]
机构
[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
基金
国家高技术研究发展计划(863计划);
关键词
Adsorption; Cosorption; Functionalized SBA15; Tetracycline; Copper; WASTE-WATER; AQUEOUS-SOLUTION; XPS SPECTRA; REMOVAL; ANTIBIOTICS; SORPTION; IONS; PH; MONTMORILLONITE; PHARMACEUTICALS;
D O I
10.1016/j.chemosphere.2015.07.014
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Finding effective methods for simultaneous removal of antibiotics and heavy metals has attracted increasing concern since both of them are frequently detected in aquatic environments. In this study, a novel mesoporous silica adsorbent (Fe-N,N-SBA15) contained dual-functional groups was synthesized by first grafting di-amino groups on SBA15, and then coordinating Fe(III) onto the adsorbent. The adsorbent was then used in the synchronous elimination of tetracycline (TC) and Cu(II) from water, which was deeply studied by solution pH, kinetics, equilibriums in sole and binary systems. It was found that the adsorbent had high affinity for both TC and Cu(II) and synergistic effects on the adsorption were found. The solution pH remarkably affected the adsorption due to pH-dependent speciation of TC, Cu(II), TC-Cu(II) complex and the surface properties of the adsorbent. Increasing adsorption amount of TC and Cu(II) on the adsorbent could be attributed to the formation of complex TC-Cu(II) bridging or the stronger affinity of the adsorbent for the TC-Cu(II) complex than that for TC or Cu(II) separately. FT-IR and XPS studies revealed that Fe(III) and amino groups on the adsorbent were complexed with the amide of TC and Cu(II), respectively. The recyclabilities of the adsorbent were also evaluated and the Fe-N,N-SBA15 exhibited good reusability for TC and Cu(II) removal. This study shows guidelines and offers an innovative, effective method for the synergistic removal of antibiotics and heavy metals from aquatic environments. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:625 / 632
页数:8
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