Yahya Rana, Elshaarawy Reda F M
University of Jeddah, College of Science, Department of Chemistry, Jeddah, Saudi Arabia.
Department of Chemistry, Faculty of Science, Suez University, 43533 Suez, Egypt; Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine Universität Düsseldorf, Düsseldorf, Germany.
Int J Biol Macromol. 2023 May 1;236:123995. doi: 10.1016/j.ijbiomac.2023.123995. Epub 2023 Mar 14.
Cross-linked quaternized polyethersulfone (QPES) hybrid mixed polymer membranes (MPMs) loading amino crystalline nanocellulose (ACNC) were successfully fabricated and applied for phosphate removal. The successful production of novel materials was validated by microscopic, spectral, and microanalytical methods. When compared to the native QPES membrane, the primary qualities of QPES hybrid membranes (hydrophilicity, porosity, permeability, antifouling) have been greatly improved overall. In addition, the surface zeta potential (SZP) and ion exchange capacity (IEC) measurements demonstrated the high positive surface charge densities of MPMs, which is beneficial for phosphate uptake. Phosphate adsorption by these membranes was studied at different temperatures, contact times, and initial phosphate concentrations using batch experiments, to investigate the optimal conditions for phosphate uptake. The MPMs showed excellent adsorption capacities with maximal removal capacities in the range of 68.8-87.95 %. Phosphate adsorption on MPMs was regulated primarily by the Sips isotherm model with multilayer adsorption capabilities and exhibited pseudo-second order kinetics (R = 0.9951-0.9976). The positive ΔH° and ΔS° values are indicative of the endothermic nature of phosphate adsorption and randomness increase. The negative ΔG° value indicates the spontaneousity of phosphate adsorption. Phosphate removal effectiveness of the membranes was maintained following recovery and regeneration with NaOH.
成功制备了负载氨基结晶纳米纤维素（ACNC）的交联季铵化聚醚砜（QPES）杂化混合聚合物膜（MPM），并将其用于除磷。通过显微镜、光谱和微量分析方法验证了新型材料的成功制备。与天然QPES膜相比，QPES杂化膜的主要性能（亲水性、孔隙率、渗透性、抗污染性）总体上有了很大提高。此外，表面zeta电位（SZP）和离子交换容量（IEC）测量表明MPM具有高正表面电荷密度，这有利于磷酸盐的吸收。使用分批实验研究了这些膜在不同温度、接触时间和初始磷酸盐浓度下对磷酸盐的吸附，以研究磷酸盐吸收的最佳条件。MPM表现出优异的吸附能力，最大去除容量在68.8 - 87.95%范围内。MPM对磷酸盐的吸附主要受具有多层吸附能力的Sips等温线模型调节，并表现出拟二级动力学（R = 0.9951 - 0.9976）。正的ΔH°和ΔS°值表明磷酸盐吸附的吸热性质和随机性增加。负的ΔG°值表明磷酸盐吸附的自发性。用NaOH回收和再生后，膜的除磷效果得以维持。
