Leather tanning industries release effluents into the river through various canals. These effluents contain chromium (VI) contaminating the river and the ground water as well. To fix a solution for this issue a simple and selective solvent extraction method has been applied by using a newly synthesized quaternary ammonium salt viz 2-benzoylethylheptyldimethylammonium bromide. By varying the parameters such as quaternary ammonium salts, sulfuric acid, pH, solvents, equilibration time and aqueous organic ratio the extraction efficiency has been determined.
Yoganand, K. S., & Umapathy, M. J. (2017). Green methodology for the recovery of Cr (VI) from tannery effluent using newly synthesized quaternary ammonium salt. Arabian Journal of Chemistry, 10, S1227–S1234. https://doi.org/10.1016/j.arabjc.2013.02.022