Reducing of pollution load in chrome tanning and dying process effluents by P(HEMA-GMA)-IDA membrane adsorption system

33rd International Union of Leather Technologists and Chemists, IULTCS Congress 2015 -- 24 November 2015 through 27 November 2015 -- 119657One of the main pollution sources of leather effluent emerges from the dyeing and tanning process because of the releasing of non-bonding dyestuffs and tanning chemicals to the waste water at the end of the process. In this study, p(HEMA-GMA) poly(hydroxyethyl methacrylate-co-glycidyl methacrylate) hydrogel membrane was produced by UV photopolymerization and the synthesized membrane was coupled with iminodiacetic acid (IDA) in order to bound the Cr(III) ions in the chrome tanning process effluent. Then p(HEMA-GMA)-IDA-Cr(III) membrane was used for removing Acid Black 210 dye in the dying process effluent. The membrane dye adsorption capacity was determined using a UV/Vis Spectrophotometer at a wavelength of 435 nm. Reusability of p(HEMA-GMA)-IDA-Cr(III) was also shown for five adsorption-desorption cycles without considerable decrease in its adsorption capacity. After the membrane application the discharged tanning and dye process waste waters characterized in order to see the waste water differences according to COD, BOD5, conductivity, pH, salinity, total dissolved solids, total suspended solids, potassium, total nitrogen and chromium content. Also SEM imagines of p(HEMA-GMA)-IDA was researched. Finally, the results showed that the metal-chelated p(HEMA-GMA)-IDA membranes were effective sorbent systems removing acid dye from leather waste water