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Removal of arsenic from sulphuric acid solutions

  • Solvent Extraction, Liquid Membranes, and Micellar Separations
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Abstract

Extraction of As(III) and As(V) from sulphuric acids solutions of H2SO4 of various concentration (50–200 g/dm3 with Cyanex 923 dissolved in Exxsol 220/230 (50% v/v) was studied and compared. Cyanex 923 can be considered as an effective arsenic extractant. Sulphuric acid is co-extracted. Extraction both of As(III) and As(V) occurs quickly and the equilibrium is obtained after 5 minutes. The isotherms of As(III) and As(V) extraction at various sulphuric acid concentrations were determined and used to model the multistage countercurrent process. Arsenic can be stripped with water.

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  1. Institute of Chemical Technology and Engineering, Poznań University of Technology, 60-965, Poznań, Poland

    M. Wiśniewski

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  1. M. Wiśniewski
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Wiśniewski, M. Removal of arsenic from sulphuric acid solutions. J Radioanal Nucl Chem 228, 105–109 (1998). https://doi.org/10.1007/BF02387308

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  • DOI: https://doi.org/10.1007/BF02387308

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