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Application of novel surface-modified PES membranes for removal of heavy metals from aqueous solutions

机译：新型表面改性PES膜在去除水溶液中重金属中的应用

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Plasma-treated poly(ether sulfone) (PES) membranes were functionalized with gama-mercaptopropyltriemethoxysilane (MPTMS) in order to increase their affinity for heavy metals during filtration of aqueous solutions. The influence of effective parameters concerning the modification process such as concentration and pH of the silane solution on both surface properties and performance of the membranes were investigated. ATR-FTIR, contact angle, SEM, and EDS measurements were carried out to characterize the membranes. After plasma treatment, the hydrophilicity of the membranes increased which resulted in an increase in the adsorption of silanol groups on the membranes surfaces. By decreasing the pH level of the silane solutions to 3.5, the adsorption of silanol groups on the surface of plasma-treated PES membranes increased. The MPTMS-modified membranes showed a significant increase in heavy metal adsorption and a decrease in flux. Moreover, MPTMS-modified membranes showed a high selectivity for Hg2+ ions as well as good stability and recovery during filtration process.
机译：用伽马巯基丙基三甲氧基硅烷（MPTMS）对等离子体处理过的聚醚砜（PES）膜进行功能化，以增加其在水溶液过滤过程中对重金属的亲和力。研究了有关改性过程的有效参数（例如硅烷溶液的浓度和pH）对膜的表面性能和性能的影响。进行ATR-FTIR，接触角，SEM和EDS测量以表征膜。在等离子体处理之后，膜的亲水性增加，这导致膜表面上硅烷醇基团的吸附增加。通过将硅烷溶液的pH值降低至3.5，等离子处理过的PES膜表面上硅烷醇基团的吸附增加。 MPTMS改性的膜显示出重金属吸附的显着增加和通量的减少。此外，MPTMS改性的膜对Hg2 +离子具有很高的选择性，并且在过滤过程中具有良好的稳定性和回收率。

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