Membrane-based extraction of nickel(II) using the mixture Acorga M5640 and DP-8R as carrier

Abstract

´10-1 to 1.0 mol L-1 sulfuric acid) in the receiving phase, pH of the feed phase (2 to 5), diluent of the membrane and carrier (2.5% v/v to 20% v/v, each reagent) and metal (1.7 10-4 to 1.4 10-3 mol L-1) concentrations in the membrane and feed phases, respectively. Under the present experimental conditions, the transport process is controlled by diffusion of nickel species in the stagnant film of the feed phase, whereas the mass transfer coefficient and the thickness of the aqueous film are estimated as 1.21 10-3 cm s-1 and 8.3 10-3 cm, respectively.]]>

Supported liquid membranes technologies in metals removal from liquid effluents

“…However, the separation process can be improved by using a more effective membrane device such as hollow fiber modules. The best separation conditions were: The best conditions for nickel(II) transport through a flat sheet supported liquid membrane using a mixture of Acorga M5640 (oxime derivative) and DP-8R (organophosphoric acid) as carrier are described in the literature [86] . This study concluded that the best conditions for nickel transport were: feed phase pH near to 4.0, extractants mixture concentration of Acorga M5640 (10 % v/v) and DP-8R (10 % v/v) using an aliphatic solvent, the concentration of the stripping phase must be among 2.5 × 10 -3 and 1.0 mol L -1 sulphuric acid.…”