CHAIN-LIKE ZERO-VALENT IRON FOR FAST DEGRADATION OF METHYL ORANGE (MO) IN WASTEWATER

Bin Wu, Li Yao, Xianzhi Cao, Yihe Huang, Zezhong Xu and Chengliang Han
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Bin Wu: College of Energy Materials and Chemical Engineering, Hefei University, Hefei 230601, P. R. China
Li Yao: College of Energy Materials and Chemical Engineering, Hefei University, Hefei 230601, P. R. China
Xianzhi Cao: ��College of Materials Science and Engineering, Southeast University, Nanjing 211189, P. R. China
Yihe Huang: College of Energy Materials and Chemical Engineering, Hefei University, Hefei 230601, P. R. China
Zezhong Xu: College of Energy Materials and Chemical Engineering, Hefei University, Hefei 230601, P. R. China
Chengliang Han: College of Energy Materials and Chemical Engineering, Hefei University, Hefei 230601, P. R. China

Surface Review and Letters (SRL), 2022, vol. 29, issue 11, 1-8

Abstract: Zero-valent iron nanomaterials with a chain-like structure (Fenm0) were prepared by a facile solution reaction at room temperature. Then, the as-prepared Fenm0 and micro-sized iron materials (Feμm0) were comparatively applied in removal of methyl orange (MO) in wastewater. Results indicated that the as-synthesized Fenm0 exhibited a chain-like structure which was made of many nanospheres with the size of 80nm. Most importantly, compared with Feμm0, the chain-like Fenm0 has higher reactive performances and could quickly and completely decompose MO in water. In comparison, the Fenm0 exhibited structurally enhanced performance of degradation of MO. The kinetic model for oxidation of MO in water matches the first-order equation. The reasons can be attributed to a large number of interfaces in the chain-like Fenm0 which leads to rapid dissolution rate of Fenm0 and subsequently produces lots of hydroxyl radicals (⋅OH) in water. The experimental results further confirmed that these kinds of chain-like iron nanomaterials with proper size could be used as new type Fenton-like materials without H2O2 addition to effectively remove dyes. Moreover, Fenm0 would be completely transformed into magnetite (Fe3O4) nanomaterials which could also be conveniently separated from wastewater by a magnet.

Keywords: Zero-valent iron nanomaterials (Fenm0); chain-like structure; Fenton-like materials; removal (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1142/S0218625X22501451

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