New hydrometallurgical approach to obtain uniform antiferromagnetic ferrous chloride cubes from waste tin cans

• Published in: Journal of materials science. Materials in electronics 2021-02, Vol.32 (3), p.2965-2972
• Main Authors: Guchhait, Sujit Kumar, Sammi, Heena, Yadav, Krishna K., Rana, Supriya, Jha, Menaka
• Format: Article
• Language: English
• Subjects: Antiferromagnetism; Characterization and Evaluation of Materials; Chemistry and Materials Science; Chloride; Containers; Crystallization; Cubes; Electron micrographs; Ethanol; Iron; Iron chlorides; Landfill; Magnetic moments; Magnetic thin films; Materials Science; Morphology; Municipal solid waste; Optical and Electronic Materials; Scanning electron microscopy; Soil pollution; Soil water; Solid wastes; Solvents; Synthesis; Water pollution
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-020-05048-1

Tin-plated iron or steel containers are one of the major disposed solid wastes after their utilization to open atmosphere, which leads to create substantial environmental pollution, especially soil and water pollution due to their disposal by landfills methods. These waste iron or steel containers, from the various iron or steel industries, contain a huge amount of iron source, which can be utilized efficiently to synthesis value-added product. In the present study, we have designed a method to grow and stabilize ferrous chloride tetrahydrate (FeCl 2 ·4H 2 O) from the waste tin-plated iron container. The crystallization rate of FeCl 2 ·4H 2 O has been controlled by the addition of anti-solvent. The present investigation reveals that with increasing anti-solvent dielectric constant, uniform cubic shape FeCl 2 ·4H 2 O particles were formed in lesser time without hampering their composition and morphology. The scanning electron micrographs (SEM) show that FeCl 2 ·4H 2 O particles were cubic in shape with size ranging from 4.2 to 6.7 μm. The purity of FeCl 2 ·4H 2 O has also been confirmed through magnetic study. M–H plot confirms the antiferromagnetic nature of the synthesized FeCl 2 ·4H 2 O ( T N  = 22.4–22.7 K). The observed magnetic moment of FeCl 2 ·4H 2 O varied from 4.85 to 4.92 μ B . The magnetic moment of synthesized FeCl 2 ·4H 2 O is in close agreement with the theoretical magnetic moment value of Fe 2+ -free ions.