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Multiple pollutants removal by functionalized heterostructures based on Na-2-Mica
Applied Clay Science ( IF 5.3 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.clay.2020.105749
M. Carolina Pazos , Lisette Ruiz Bravo , Sebastián E. Ramos , Francisco J. Osuna , Esperanza Pavón , María D. Alba

Abstract Organomica, C8–2-Mica, was obtained from a high charged synthetic mica, Na-2-Mica, by cation exchange reaction with octylammonium cations and these were used to host other bulky guest species such as polyhydroxy aluminium cations, Al1320. The hydrolization of 3-mercaptopropyltrimethoxysilane (MPTMS) allowed the covalent attachment with hydroxyl groups of the oligomeric cation, providing thiol groups that create specific adsorption sites, Al1320/SH. The structure of the adsorbents was analysed by XRD and Infrared spectroscopy and these were tested as an adsorbent for the removal of zinc and herbicide MCPA from aqueous solutions. C8–2-Mica was the best adsorbent for MCPA and thiol groups favoured the adsorption of Zn2+. Moreover, Al1320/SH showed excellent adsorptive properties for the simultaneous adsorption of MCPA and Zn2+.

中文翻译:

基于 Na-2-Mica 的功能化异质结构去除多种污染物

摘要 有机云母 C8-2-云母是从高电荷合成云母 Na-2-Mica 通过与辛基铵阳离子进行阳离子交换反应获得的,这些用于承载其他大客体物种,如多羟基铝阳离子 Al1320。3-巯基丙基三甲氧基硅烷 (MPTMS) 的水解允许与低聚阳离子的羟基共价连接,提供产生特定吸附位点的硫醇基团,Al1320/SH。通过 XRD 和红外光谱分析吸附剂的结构,并测试这些吸附剂作为从水溶液中去除锌和除草剂 MCPA 的吸附剂。C8-2-Mica 是 MCPA 的最佳吸附剂,硫醇基团有利于 Zn2+ 的吸附。此外,Al1320/SH 在同时吸附 MCPA 和 Zn2+ 方面表现出优异的吸附性能。
更新日期:2020-10-01
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