3-巯丙基三甲氧基硅烷修饰MCM-41对Pb^(2+)的吸附性能  

Adsorption Properties of(3-Mercaptopropyl)trimethoxysilane Modified MCM-41 for Pb^(2+)

作　　者：常亮亮 田军乐 丁绮 刘璇 王亚强 王侠 CHANG Liangliang;TIAN Junle;DING Qi;LIU Xuan;WANG Yaqiang;WANG Xia(College of Chemical Engineering and Modern Materials,Shangluo University,Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shaanxi Engineering Research Center for Mineral Resources Clean&Efficient Conversion and New Materials,Shangluo Shaanxi 726000,China;Shangluo Central Hospital,Shangluo Shaanxi 726000,China;Shaanxi Daxigou Mining Co.,Ltd.,Shangluo Shaanxi 726000,China)

机构地区：[1]商洛学院化学工程与现代材料学院,陕西省尾矿资源综合利用重点实验室,陕西省矿产资源清洁高效转化与新材料工程研究中心,陕西商洛726000 [2]商洛市中心医院,陕西商洛726000 [3]陕西大西沟矿业有限公司,陕西商洛726000

出　　处：《当代化工》2025年第3期589-594,共6页Contemporary Chemical Industry

基　　金：陕西省教育厅重点实验室项目(项目编号:22JS013);商洛市自然科学基金项目(项目编号:2022-Y-0058);陕西省重点研发计划项目(项目编号:2023-YBGY-503);商洛学院科研项目(项目编号:21FK001);商洛学院应用催化科研团队项目(项目编号:19SCX01);商洛学院博士科研启动项目(项目编号:23SKY006);陕西省级大学生创新创业训练项目(项目编号:202211396004)。

摘　　要：将3-巯丙基三甲氧基硅烷修饰于铁尾矿为原料制备的MCM-41分子筛表面上,获得巯丙基三甲氧基硅烷修饰的MCM-41吸附剂(KH-590/MCM-41)。以水中Pb^(2+)为目标污染物,研究了KH-590/MCM-41吸附性能,并考察了吸附过程的热力学及动力学行为。结果表明:成功制备了对Pb^(2+)吸附性能良好的KH-590/MCM-41;当pH=6、KH-590/MCM-41质量为30 mg、吸附时间为7 min、Pb^(2+)初始质量浓度为30 mg·L^(-1)、吸附温度为323 K时,KH-590/MCM-41对Pb^(2+)的吸附性能最佳,吸附量为100.70 mg·g^(-1)。准二级动力学模型和Langmuir等温模型更适合描述KH-590/MCM-41对Pb^(2+)吸附行为,吸附是以化学吸附为主导的单层吸附。The adsorbent of MCM-41 modified by(3-mercaptopropyl)trimethoxysilane(KH-590/MCM-41)was obtained by modifying(3-mercaptopropyl)trimethoxysilane on the surface of MCM-41 molecular sieve prepared from iron tailings.Taking Pb^(2+)as the target pollutant in water,the adsorption properties of KH-590/MCM-41 were studied,and the thermodynamic and kinetic behaviors of the adsorption process were investigated.The results showed that KH-590/MCM-41 with excellent adsorption performance for Pb^(2+)was successfully prepared;when pH=6,the mass of KH-590/MCM-41 was 30 mg,adsorption time was 7 min,initial mass concentration of Pb^(2+)was 30 mg·L^(-1),adsorption temperature was 323 K,the maximum adsorption capacity of KH-590/MCM-41 for Pb^(2+)could reach 100.70 mg·g^(-1).Moreover,the adsorption behavior of Pb^(2+)by KH-590/MCM-41 more followed the quasi-second-order kinetic model and Langmuir isothermal model,and the adsorption was a single-layer adsorption dominated by chemical adsorption.

关 键 词：巯丙基三甲氧基硅烷 修饰 MCM-41分子筛 吸附性能 Pb^(2+) 

分 类 号：TQ028.15[化学工程]