Removal of heavy metals using food industry waste as a cheap adsorbent

Due to the high capacity of food factories, a lot waste is generated. presence nutrients in them can increase pollution sewerage network and cause environmental problems. To animal feed, grain be used produce fertilizer, compost, fuel, soil cover, etc. The natural pigment lycopene, thickeners, proteins, etc., produced from seeds skin tomato paste factory waste. In present paper, soybean oil residue was remove cadmium, zinc, lead ions aqueous solutions. Discontinuous experiments investigate effect initial concentration (100-300 ppm), solution pH (1-5), contact time (1-60 min), adsorbent amount (0.02-2 g) on uptake by residues. results showed that with increasing pH, value time, adsorbent, adsorption rate increases metal ions, decreases. According results, best for about 3-5, equilibrium cadmium 40 minutes, zinc 20 lead, ion 10 minutes.