School of Chemical Engineering, Yeungnam University, Gyeongsan, 38544, Republic of Korea.
Department of Physiology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Science (SIMATS), Saveetha University, Chennai, 600077, India.
Environ Geochem Health. 2024 Aug 28;46(10):401. doi: 10.1007/s10653-024-02169-y.
A surface-modified mesoporous silica nanoparticle containing dimercaprol monomers was created utilizing the sol-gel condensation process, using tetraethyl orthosilicate (TEOS) as the silica source and poloxamer as the structure directing agent. To accomplish this synthesis, 3-glycidoxypropyl triethoxysilane (GPTS, 20 mol%) was incorporated into the silica walls during the sol-gel condensation process, along with TEOS. Furthermore, dimercaprol (DM) monomers were incorporated onto silica surfaces by a ring-opening reaction between GPTS epoxy groups, and dimercaprol hydroxyl groups. The prepared dimercaprol-modified silica adsorbent (MSN-DT NPs) material has been studied using a variety of instruments, including XRD, FT-IR, N adsorption-desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric (TG) analysis, and zeta potential analysis. The MSN-DT NPs material selectively adsorbs mercury ions, with a high adsorption amount of 125 mg/g and a removal capability of roughly ~ 90% from the original metal ion mixture comprising other competing metals such as Pb, Ni, Fe, and Zn. The MSN-DT NPs adsorbent shows recyclable qualities for up to five cycles when treated with an acidic aqueous solution (0.1 M HCl). As a result, the MSN-DT NPs adsorbent may be regenerated and reused up to five times without losing its adsorption effectiveness. The experimental findings showed that the MSN-DT NPs adsorbent may be employed to selectively remove hazardous Hg ions from an aqueous solution.
利用溶胶-凝胶缩合过程，以四乙氧基硅烷（TEOS）为硅源，聚氧乙烯醚为结构导向剂，制备了一种含有二巯基琥珀酸单体制备的表面修饰的介孔硅纳米粒子。在溶胶-凝胶缩合过程中，将 3-缩水甘油丙基三乙氧基硅烷（GPTS，20 mol%）与 TEOS 一起掺入硅壁中，以完成这种合成。此外，通过 GPTS 环氧基团与二巯基琥珀酸羟基之间的开环反应，将二巯基琥珀酸单体接枝到硅表面上。所制备的二巯基琥珀酸修饰的硅吸附剂（MSN-DT NPs）材料已使用多种仪器进行了研究，包括 XRD、FT-IR、N 吸附-解吸、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、热重分析（TG）和zeta 电位分析。MSN-DT NPs 材料对汞离子具有选择性吸附，吸附量高达 125mg/g，从原始金属离子混合物（包括其他竞争金属如 Pb、Ni、Fe 和 Zn）中去除能力约为 90%。MSN-DT NPs 吸附剂在处理酸性水溶液（0.1 M HCl）时，具有可重复使用 5 次的特性。因此，MSN-DT NPs 吸附剂可以在不失去吸附效果的情况下再生和重复使用 5 次。实验结果表明，MSN-DT NPs 吸附剂可用于从水溶液中选择性去除有害的 Hg 离子。
