selective removal of malachite green dye from aqueous solutions by supported liquid membrane technology a labscale study on the application of supported liquid membranes slm has been conducted for recovery and selective removal of malachite green dye from wastewater naturally occurring nontoxic vegetable oils have been used as membrane liquids polyvinylidene fluoride pvdf films have been used as supports for the liquid membrane various parameters affecting the dye permeation such as initial dye concentration ph stripping acid concentration oil viscosity and membrane stability have been investigated the highest flux value 165 105 mgcm2sec was obtained with a sunflower oil supported membrane at ph 11 in the feed and 025 m hcl in the stripping solution the membrane showed good stability under optimum conditions and maximum transport was achieved in 8 h of permeation time