Adsorption Evaluation of Food and Industrial Dyes on Nano copper oxide

Abstract

In This applicable research, investigating absorption of process of<br />Erythrosine dye on Copper oxide Nano particles Adsorbent was studied. First, prepared dye<br />concentrations of 6, 8 and 12 mg L-1 and then effects of parameters such as concentrations of<br />initial dye, time and pH on dye absorption efficiency were investigated.The dye<br />concentrations in different samples were measured via spectrophotometer (505.6 nm for dye<br />Erythrosine wavelength).<br />The results of absorption studies showed that Erythrosine absorption or removal rates<br />would increase with decreasing the primary dye concentration, increasing reaction time , and<br />decreasing pH on the basis of the results, copper oxide Nano particles can the absorb<br />Erythrosine dye appropriately and efficiency of the process is higher in acidic pH for dye<br />Erythrosine. The maximum dye removal of 93.68 % could be achieved at initial pH 2 using<br />adsorbent dosage of 0.233gr in 50 ml (12 mg L-1 dye concentration) and agitation rate of 180<br />rpm. Effect of different parameters as kinetic parameters, were calculated pseudo-First and<br />second-order kinetic, the Langmuir and Freundlich models Isotherm for absorb of this dye on<br />adsorbent. this results showed that second-order kinetic adherence possessing regression<br />coefficient of R2 ≥ 0.999, absorption or removal of Erythrosine on Copper oxide nano<br />particles and different parameters for investigating of process rate of absorption in to be this<br />experience. Equilibrium data fitted well with the Langmuir model for dye with adsorbent.