Abstract

RAMIREZ MARIN, Alejandro et al. Synthesis of micro and nanoparticles from pickling effluents from the hot-dip galvanizing industry. Rev. ion [online]. 2023, vol.36, n.1, pp.49-58.  Epub Feb 28, 2023. ISSN 0120-100X.  https://doi.org/10.18273/revion.v36n1-2023004.

The hot-dip galvanizing process is one of the most widely used techniques for protecting steel against corrosion and consists of immersing the steel in a bath of molten zinc. This process consists of several stages and each of them produces solid waste or effluents with metallic content, which must be treated before being disposed of in landfills and public sewers. These residues are around 1,000,000 t/year worldwide. The safe disposal of these is of great importance for the protection of the environment. The most critical stage of this process is pickling, which generates effluents that are very complex to treat due to their acidic character and metallic content, but they are of interest for obtaining value-added materials. In this article, micro and nanoparticles of iron and zinc are obtained from pickling effluents from the hot-dip galvanizing industry, using four different routes of chemical synthesis (co-precipitation and sol-gel), obtaining particles with different sizes, morphologies and crystal structures.

Keywords : Hot dip galvanizing; Pickling; Nanoparticles; Chemical synthesis; Iron; Zinc.

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