硅烷偶联剂改性埃洛石/Fe3O4复合材料的制备及对Sb^(5+)的去除  

Preparation of Silane Coupling Agents Modified Halloysite-Fe_3O_4 Composites and Sb^(5+) Removal

作　　者：祝可成 査向浩 古丽戈娜 贾汉忠[4] 马承愚[1,2] 

机构地区：[1]东华大学环境科学与工程学院,国家环境保护纺织工业污染防治工程技术中心,上海201620 [2]喀什大学化学与环境科学学院,新疆喀什844006 [3]喀什地区环境监测站,新疆喀什844000 [4]中国科学院新疆理化技术研究所,新疆乌鲁木齐830011

出　　处：《水处理技术》2017年第7期65-70,75,共7页Technology of Water Treatment

基　　金：国家自然科学基金(51173022);国家重点研发计划(2016YFC0400501)

摘　　要：通过原位沉淀法合成埃洛石-四氧化三铁(HNTs-Fe_3O_4),分别采用4种不同的硅烷偶联剂对其进行表面改性制备4种不同的吸附剂,对KH-108改性后的材料进行了结构表征,并对其在不同影响因素下对水溶液中5价锑的吸附效果进行了研究。结果表明,埃洛石已经被成功改性,其中3-哌嗪基丙基甲基二甲氧基硅烷(KH-108)改性的HNTs/Fe_3O_4对水体中的Sb^(5+)具有最好的吸附效果。优化吸附p H为3,该吸附过程可以用准2级动力学和Langmuir方程进行很好的拟合,主要吸附机理是Sb^(5+)在吸附剂表面形成了内层络合物。The nanocomposite HNTs-Fe3O4 was prepared by situ precipitation, and used 4 kinds silane coupling agents to modified the surface of HNTs- Fe3O4 to form 4 kinds adsorbents. Then the structure of HNTs-Fe3O4 composites which modified by KH-108 was characterized, and the effects of different influence factors on Sb5＋ absorption efficiency.in water were researched. The results indicated that KH-108 was successfully grafted onto the halloysite （KH-108） modified HNTs-Fe3O4 composites （m-HNTs-Fe3O4） exhibited the best adsorption capacity for Sb5＋. The results showed that the optimum pH.was found to be 3, and the pseudo-second-order and Freundlich isotherm model were fitted to the experimental data significantly better. The main adsorption mechanism was considered to inner-sphere complexes might be formed on the adsorbent＇s surface.

关 键 词：改性埃洛石 四氧化三铁 硅烷偶联剂 5价锑 吸附 

分 类 号：TQ424.29[化学工程]