Journal of Membrane Science vol:234 issue:1-2 pages:11-21
Heavy metal ions very often appear in high concentrations in all kind of effluents giving rise to hazards of pollution because of their high toxicities and wide environmental spreading. This paper deals with the recovery of nickel ions from effluents resulting from the metal finishing industry. In the first stage, commercial extractants were screened by means of conventional extractions. Combining organophosphoric or organophosphinic acids with oximes lead to enhanced Ni(II) extraction. The influence of the type of extractant was investigated as well as other critical parameters such as concentration and pH of the feed.