Green Analytical Chemistry Laboratory, School of Chemical Sciences, Universiti Sains Malaysia. 11800 Minden, Pulau Pinang, Malaysia; Department of Chemistry, Sa'adu Zungur University, P.M.B 065 Gadau, Nigeria.
Green Analytical Chemistry Laboratory, School of Chemical Sciences, Universiti Sains Malaysia. 11800 Minden, Pulau Pinang, Malaysia.
Int J Biol Macromol. 2023 Jul 31;244:125400. doi: 10.1016/j.ijbiomac.2023.125400. Epub 2023 Jun 16.
Several water and wastewater technologies have been implored for the removal of dyes during wastewater treatments; however; different types have been reportedly found in surface and groundwater systems. Hence, there is a need to investigate other water treatment technologies for the complete remediation of dyes in aquatic environments. In this study, novel chitosan-based polymer inclusion membranes (PIMs) were synthesized for the removal of malachite green dye (MG) which is a recalcitrant of great concern in water. Two types of PIMs were synthesized in this study, the first PIM (PIMs-A) was composed of chitosan, bis-(2-ethylhexyl) phosphate (B2EHP), and dioctyl phthalate (DOP). While, the second PIMs (PIMs-B) were composed of chitosan, Aliquat 336, and DOP. The physico-thermal stability of the PIMs was investigated using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA), both PIMs demonstrated good stability with a weak intermolecular force of attraction amongst the various components of the membranes. The effects of the initial concentration of MG, pH of the MG solution, stripping solution, and time were investigated. At optimum conditions, both membranes (PIM-A and B) recorded the highest efficiencies of 96 % and 98 % at pH 4 and initial contaminants concentration of 50 mg/L, respectively. Finally, both PIMs were used for the removal of MG in different environmental samples (river water, seawater, and tap water) with an average removal efficiency of 90 %. Thus, the investigated PIMs can be considered a potential suitable technique for the removal of dyes and other contaminants from aquatic matrices.
几种水和废水技术已被用于在废水处理中去除染料；然而，据报道，不同类型的染料已在地表水和地下水系统中被发现。因此，需要研究其他水处理技术，以彻底修复水环境污染中的染料。在本研究中，合成了新型壳聚糖基聚合物整体膜（PIMs），用于去除孔雀石绿染料（MG），这是水中的一种难处理的污染物。本研究中合成了两种 PIM，第一种 PIM（PIMs-A）由壳聚糖、双（2-乙基己基）磷酸酯（B2EHP）和邻苯二甲酸二辛酯（DOP）组成。而第二种 PIMs（PIMs-B）由壳聚糖、Aliquat 336 和 DOP 组成。通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和热重分析（TGA）研究了 PIMs 的热物理稳定性，两种 PIM 均表现出良好的稳定性，膜中各组分之间的分子间吸引力较弱。考察了 MG 的初始浓度、MG 溶液的 pH 值、洗脱液和时间的影响。在最佳条件下，两种膜（PIM-A 和 B）在 pH 4 和初始污染物浓度为 50mg/L 时，分别记录了最高效率 96%和 98%。最后，两种 PIM 均用于去除不同环境样品（河水、海水和自来水）中的 MG，平均去除效率为 90%。因此，所研究的 PIM 可被认为是一种从水基质中去除染料和其他污染物的潜在合适技术。
