Study on Cu(Ⅱ) Removal Properties of Sulfide Nano Zero-valent Iron Composites
DING Yarong1, LI Canhua1,2,*, ZHANG Lanyue1, LI Jiamao3, HE Chuan1, LI Minghui1, ZHU Weichang3, WEI Shuxian1
1 School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan 243002, Anhui, China 2 Research Institute of Intelligent Equipment Technology of AHUT, Ma'anshan 243002, Anhui, China 3 School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan 243002, Anhui, China
Abstract: Sulfide nano zero-valent iron (S-nZVI) and its composites are famous for their excellent performance in removing heavy metals, but the high preparation cost greatly limits the development and application of S-nZVI. In this work, S-nZVI@Ma nanocomposites were prepared by fluidizing phase reaction using Na2S2O4 as a single reducing agent. S-nZVI@Ma was characterized by means of SEM, TEM, EDS, XPS, XRD, FTIR and VSM. The removal effect of S-nZVI@Ma on Cu(Ⅱ) from simulated wastewater was studied. The results show that S-nZVI@Ma can efficiently remove more than 99% Cu(Ⅱ) from the simulated waste liquid and can be separated from the simulated waste liquid by external magnet. After 5 times of reuse, the removal rate of Cu(Ⅱ) by S-nZVI@Ma remained above 75%, indicating that the material has good magnetic recycling performance. The removal process of Cu(Ⅱ) conforms to the quasi-second-order kinetic model and the Langmuir isothermal adsorption model, and the maximum capacity (qmax) is 71.43 mg·g-1. Thermodynamic studies show that the removal process is spontaneous and endothermic. The reactants were characterized by FESEM-EDS, XRD, XPS and FTIR, and the reaction mechanism was discussed from the point of view of electron transfer. The above research can provide reference for the practical application of S-nZVI.
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2025, Vol. 39 
