Facile surface modification of mesoporous silica with heterocyclic silanes for efficiently removing arsenic

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英文篇名：Facile surface modification of mesoporous silica with heterocyclic silanes for efficiently removing arsenic 作者：Xiaohui ; Zhu ; Wei ; Jiang ; Weirong ; Cui ; Ruping ; Liang ; Li ; Zhang ; Jianding ; Qiu 英文作者：Xiaohui Zhu;Wei Jiang;Weirong Cui;Ruping Liang;Li Zhang;Jianding Qiu;College of Chemistry,Nanchang University;Environmental Protection Materials and Equipment Enginering Technology Center of Jiangxi,Department of Materials and Chemical Engineering,Pingxiang University; 英文关键词：Arsenite;;Arsenate;;SBA-15;;Remove;;Click reaction;;Synergistic effect 中文刊名：FXKB 英文刊名：中国化学快报(英文版) 机构：College of Chemistry,Nanchang University;Environmental Protection Materials and Equipment Enginering Technology Center of Jiangxi,Department of Materials and Chemical Engineering,Pingxiang University; 出版日期：2019-06-15 出版单位：Chinese Chemical Letters 年：2019 期：v.30 基金：the supports of the National Natural Science Foundation of China(Nos. 21675078 and 21775065);; the Natural Science Foundation of Jiangxi Province(Nos. 20165BCB18022 and 2018ACB21008) 语种：英文; 页：FXKB201906002 页数：4 CN：06 ISSN：11-2710/O6 分类号：17-20

摘要

Arsenic being one of the most toxic heavy metals has long been a focus of concern due to its gravest threats to human health and environment.Herein,we employ a new method named ring-opening click reaction to synthesize thiol-and amino-bifunctionalized SBA-15(denoted as bi-SBA-15)for directly remove As(Ⅲ)without preoxidation As(Ⅲ)to As(V)from contaminated water.Quite different from commonly modified with trialkoxysilanes,ring-opening click reaction is substantially faster(0.5-2 h at25 ℃)and mo re efficient.The synthesized bi-SBA-15 exhibits excelle nt adsorption perfo rmance of As(Ⅲ)and As(V)in an aqueous solution with a great adsorption capacity(33.70 mg/g and 42.66 mg/g,respectively),a very short equilibrium time(<30 min),which is much faster than those of other adsorbents reported previously.The excellent adsorption performance of bi-SBA-15 can be maintained with a wide pH range(3-8),various anions and natural organic matter,which provides an effective approach and a new insight to clean arsenic-contaminated water.
        Arsenic being one of the most toxic heavy metals has long been a focus of concern due to its gravest threats to human health and environment.Herein,we employ a new method named ring-opening click reaction to synthesize thiol-and amino-bifunctionalized SBA-15(denoted as bi-SBA-15)for directly remove As(Ⅲ)without preoxidation As(Ⅲ)to As(V)from contaminated water.Quite different from commonly modified with trialkoxysilanes,ring-opening click reaction is substantially faster(0.5-2 h at25 ℃)and mo re efficient.The synthesized bi-SBA-15 exhibits excelle nt adsorption perfo rmance of As(Ⅲ)and As(V)in an aqueous solution with a great adsorption capacity(33.70 mg/g and 42.66 mg/g,respectively),a very short equilibrium time(<30 min),which is much faster than those of other adsorbents reported previously.The excellent adsorption performance of bi-SBA-15 can be maintained with a wide pH range(3-8),various anions and natural organic matter,which provides an effective approach and a new insight to clean arsenic-contaminated water.

引文

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