文献类型：期刊文献

英文题名：Synthesis of Ce-doped magnetic NaY zeolite for effective Sb removal: Study of its performance and mechanism

作者：Wang, Dingding[1];Qiu, Zhaofu[1];He, Sha[1];Yuan, Yongqian[1];Jin, Xibiao[1];Yang, Ji[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China

年份：2022

卷号：636

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：;EI(收录号：20215111371516);WOS:【SCI-EXPANDED(收录号:WOS:000738023800001)】；

基金：The authors would like to express their sincere gratitude to the Central Universities (222201817009) and the National Environmental Protection Public Welfare Science and Technology Research Program of China (No. 201309021) for their financial support.

语种：英文

外文关键词：Antimony adsorption; NaY zeolite; Magnetic; Ce-doped

摘要：A Ce-doped magnetic NaY zeolite adsorbent (NaY@Ce-Fe) was synthesized by co-precipitation method for efficient Sb removal. NaY@Ce-Fe exhibited considerable maximum adsorption capacities of Sb (11.56 +/- 0.58 mg/g for Sb(III) and 5.36 +/- 0.43 mg/g for Sb(V)) and reusability property and excellent saturated magnetization of 71.1 emu/g. The adsorption data of Sb(III) and Sb(V) were well fitted with the Langmuir isotherm model and Freundlich isotherm model, respectively. Kinetic studies showed that the adsorption processes of Sb(III) and Sb (V) followed the pseudo-second-order kinetic model. The excellent adsorption performance of NaY@Ce-Fe maintained over a wide pH range of 4-9 without the release of Ce and Fe, or in the presence of coexisting anions of Cl-, SO42- and NO3- . The combined results of scanning electron microscope (SEM), energy dispersive X-ray spectrometry (EDS), X-ray Powder Diffraction (XRD), Fourier transform infrared (FT-IR), and X-ray photoelectron spectroscopy (XPS) further confirmed the successful doping of Ce and Fe3O4 on NaY. Based on the results of batch experiments and physiochemical analyses, the mechanisms controlling Sb adsorption on NaY@Ce-Fe involved the electrostatic attraction, hydrogen bonding, ligand exchange and surface complexation. The abundant number of surface hydroxyl groups promoted the formation of the Ce-O-Sb inner-sphere surface complexes, which was the major contribution to the adsorption of Sb. All the results suggested that NaY@Ce-Fe could be applied as a promising adsorbent for Sb pollution reduction.