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化工新型材料  2019, Vol. 47 Issue (7): 271-274    
  开发与应用 本期目录 | 过刊浏览 | 高级检索 |
3-氨丙基三乙氧基硅烷改性蛭石的制备及其对Pb(Ⅱ)的选择性吸附研究
顾士庆1,2, 王兰1*, 王传义1
1.中国科学院新疆理化技术研究所环境科学与技术研究室, 乌鲁木齐830011;
2.中国科学院大学,北京100049
Preparation of APTES-Verm and its selective adsorption for Pb(Ⅱ)
Gu Shiqing1,2, Wang Lan1, Wang Chuanyi1
1.Xinjiang Technical Institute of Physics & Chemistry,Chinese Academy of Sciences, Urumqi 830011;
2.University of Chinese Academy of Sciences,Beijing 100049
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摘要 以天然蛭石(Verm)为原料,通过无机酸改性和有机改性制备出3-氨丙基三乙氧基硅烷改性蛭石(APTES-Verm)。采用傅里叶变换红外光谱仪、热分析仪、场发射扫描电子显微镜、多分子层吸附模型等多种表征手段分析了Verm、酸改性蛭石(a-Verm)和APTES-Verm这3种吸附材料的结构和物理化学性质,并研究了APTES-Verm对环境水体中4种常见的重金属污染物——Cu(Ⅱ)、Pb(Ⅱ)、Cd(Ⅱ)、Hg(Ⅱ)离子的吸附性能。结果表明:用无机酸处理后,得到了比表面积增大、表面富含反应性硅羟基(Si—OH)的a-Verm;a-Verm经过进一步的有机改性后,在Si—OH基团的桥梁作用下,接枝上APTES,相应引入了大量对重金属离子具有吸附作用的—NH2基团。制备的APTES-Verm对Pb(Ⅱ)离子的吸附具有明显的选择性,吸附量达到210.865mg/g。
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顾士庆
王兰
王传义
关键词:  蛭石  胺基功能化  表面改性  重金属吸附  Pb(Ⅱ)选择性吸附    
Abstract: APTES modified vermiculite (APTES-Verm) was synthesized with vermiculite (Verm) by inorganic acid modification and organic modification methods successively.The surface properties and structures of Verm,Acid-modified Verm (a-Verm) and APTES-Verm were analyzed by FT-IR,TG-DTG,SEM and BET.The adsorption test was studied for the four common heavy metal ions,Cu(Ⅱ),Pb(Ⅱ),Cd(Ⅱ) and Hg(Ⅱ) in the environment.The results show that:the surface area of vermiculite was greatly increased by acid modification,and the Si—OH groups were exposed on the surfaces of vermiculite;the organic modification reaction grafted APTES onto the surfaces of a-Verm successfully,introduced a large amount of —NH2 groups with excellent adsorption function;the surface properties of vermiculite were improved by surface modification methods,the adsorption capacity of vermiculite was greatly improved,and the adsorption for Pb(Ⅱ) showed obvious selectivity in comparison with Cu(Ⅱ),Cd(Ⅱ) and Hg(Ⅱ),the adsorption capacity for Pb(Ⅱ) was 210.865mg/g.
Key words:  vermiculite    amine-functionalization    surface modification    heavy metal removal    selective adsorption for Pb(Ⅱ)
收稿日期:  2018-03-07                出版日期:  2019-07-20      发布日期:  2019-08-05      期的出版日期:  2019-07-20
基金资助: 国家自然科学基金项目(U1403295,U1703129)
通讯作者:  王兰(1985-),女,副研究员,主要研究方向为光催化、环境功能材料   
作者简介:  顾士庆(1992-),男,研究生,主要研究方向为环境功能材料
引用本文:    
顾士庆, 王兰, 王传义. 3-氨丙基三乙氧基硅烷改性蛭石的制备及其对Pb(Ⅱ)的选择性吸附研究[J]. 化工新型材料, 2019, 47(7): 271-274.
Gu Shiqing, Wang Lan, Wang Chuanyi. Preparation of APTES-Verm and its selective adsorption for Pb(Ⅱ). New Chemical Materials, 2019, 47(7): 271-274.
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http://www.hgxx.org/CN/  或          http://www.hgxx.org/CN/Y2019/V47/I7/271
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