In this study, the metal organic framework (MOF) ZIF-8 was investigated as potential adsorbent for heavy metal ions. The MOF powder was used further to prepare mixed matrix beads (MMBs) using polysulfone as the base material. Both the MOF powder and the MMBs were characterized using Field emission scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller (BET) analyzer and zetasizer. Adsorption capacity of the MMBs were 164−220 mg/g for Pb and 92−161 mg/g for Cd. A fundamental pore diffusion-adsorption model was used to predict the batch kinetics for both single and multicomponent cases and effective pore diffusivities and mass transfer coefficients were determined. Mutual interactions among heavy metals were quantified using interaction parameters. ZIF-8, incorporated in the PSF matrix, plays the predominant role in capturing the metal ions through surface complexation with the NH and metal-OH groups. A first principle-based model involving convection, diffusion and adsorption was used to quantify the breakthrough behavior for the continuous fixed bed column using the MMBs. The column performance was tested with battery industry effluent. The saturated beads were suitably regenerated using 0.1(M) HCl solution. Finally, the model parameters were used for scaling up of the columns.

在这项研究中，金属有机骨架（MOF）ZIF-8被研究为重金属离子的潜在吸附剂。将MOF粉末进一步用于以聚砜为基础材料制备混合基质珠（MMB）。MOF粉末和MMB均使用场发射扫描电子显微镜，傅立叶变换红外光谱，X射线衍射，X射线光电子能谱，Brunauer-Emmett-Teller（BET）分析仪和Zetasizer进行表征。MMB对Pb的吸附容量为164-220 mg / g，对Cd的吸附容量为92-161 mg / g。使用基本的孔扩散吸附模型来预测单组分和多组分情况的批处理动力学，并确定有效的孔扩散率和传质系数。重金属之间的相互作用使用相互作用参数进行定量。ZIF-8，掺入PSF基质中的金属在通过与NH和金属OH基团进行表面络合来捕获金属离子方面起主要作用。使用基于对流，扩散和吸附的第一个基于原理的模型来量化使用MMB的连续固定床色谱柱的穿透行为。用电池工业废水测试了色谱柱的性能。使用0.1（M）HCl溶液适当地再生饱和的珠。最后，模型参数用于按比例放大列。用电池工业废水测试了色谱柱的性能。使用0.1（M）HCl溶液适当地再生饱和的珠。最后，模型参数用于按比例放大列。用电池工业废水测试了色谱柱的性能。使用0.1（M）HCl溶液适当地再生饱和的珠。最后，模型参数用于按比例放大列。