State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 20037, China.
J Environ Manage. 2022 Jan 15;302(Pt B):114103. doi: 10.1016/j.jenvman.2021.114103. Epub 2021 Nov 16.
In this study, (3-mercaptopropyl) triethoxysilane (MPTMS)-modified ordered mesoporous silica (OMS) materials were prepared using a post-grifting method, with MPTMS as the organic functionalized reagent. The OMS materials were analyzed by FT-IR spectra, N sorption, and small angle X-ray scattering to evaluate their potential for scavenging Cd from water. Moreover, a (3-mercaptopropyl) triethoxysilane-functionalized ordered mesoporous silica modified polyvinylidene fluoride (MPTMS-OMS/PVDF) membrane was synthesized using the solvent phase inversion method to remediate wastewater containing heavy metal ions. The MPTMS-OMS was characterized by a maximum specific surface area of 422 m/g, high surface hydrophilicity, and high pure water flux. The MPTMS-OMS/PVDF exhibited a dynamic adsorption capacity for Cd in water. At an MPTMS-OMS content of 5 wt%, the Cd removal efficiency was 90%, whereas the pure PVDF showed no Cd adsorption capacity. These results highlight the potential of the MPTMS-OMS/PVDF membrane to eliminate Cd during the decontamination of aqueous streams containing low-concentrations of contaminants.
在这项研究中，采用后嫁接法制备了（3-巯丙基）三乙氧基硅烷（MPTMS）修饰的有序介孔硅（OMS）材料，其中 MPTMS 作为有机功能化试剂。通过傅里叶变换红外光谱（FT-IR）、N 吸附和小角 X 射线散射对 OMS 材料进行了分析，以评估其从水中清除 Cd 的潜力。此外，还采用溶剂相转化法合成了（3-巯丙基）三乙氧基硅烷修饰的有序介孔硅改性聚偏二氟乙烯（MPTMS-OMS/PVDF）膜，用于修复含有重金属离子的废水。MPTMS-OMS 的特征在于最大比表面积为 422 m/g、高表面亲水性和高纯水通量。MPTMS-OMS/PVDF 对水中的 Cd 表现出动态吸附能力。在 MPTMS-OMS 含量为 5wt%时，Cd 的去除效率为 90%，而纯 PVDF 对 Cd 没有吸附能力。这些结果突出了 MPTMS-OMS/PVDF 膜在去除低浓度污染物的水相中 Cd 的潜力。
