文献类型：期刊文献

英文题名：Removal of Phosphate by Adsorption with 2-Phenylimidazole-Modified Porous ZIF-8: Powder and Chitosan Spheres

作者：Zhao, Yu[1];Yuan, Pei-Qing[2];Xu, Xin-Ru[1];Yang, Jingyi[1]

机构：[1]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：8

期号：31

起止页码：28436

外文期刊名：ACS OMEGA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001033985300001)】；

基金：The authors are grateful to the National Natural Science Foundation of China (22178113).

语种：英文

摘要：Due to rapid socioeconomicdevelopment, increased phosphorusconcentrationscan cause eutrophication of water bodies, with devastating effectson environmental sustainability and aquatic ecosystems. In this study,ZIF-8-PhIm was prepared for phosphorus removal using 2-phenylimidazolevia the solvent-assisted ligand exchange (SALE) method. The structureand composition of ZIF-8-PhIm were characterized by various methods,including X-ray diffraction (XRD), scanning electron microscopy (SEM),Fourier transform infrared spectroscopy (FT-IR), H-1 nuclearmagnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS),and Brunauer-Emmett-Teller (BET) analysis. Comparedto the ZIF-8 material, it exhibited a multistage pore structure withlarger pore capacity and pore size, increased hydrophilicity, exposureof more adsorption sites, and also stronger electrostatic interaction.Under optimized conditions (T = 298 K, C (0) = 150 mg/L, dose = 0.2 g/L), the adsorption capacityof ZIF-8-PhIm reached 162.93 mg/g, which was greater than that ofthe ZIF-8 material (92.07 mg/g). The Langmuir isotherm and pseudo-second-orderkinetic models were suitable for describing the phosphate adsorptionof ZIF-8-PhIm. The main effects of ZIF-8-PhIm on phosphate adsorptionwere Zn-O-P bonding and electrostatic interactions.It also had good regeneration properties. The ZIF-8-PhIm/CS sphereswere prepared using chitosan (CS) as the cross-linking agent. Theresults of dynamic adsorption experiments on the spheres showed asaturation capacity of 85.69 mg/g and a half-penetration time of 514.15min at 318 K according to the fitted results.