Adsorption Evaluation of Food and Industrial Dyes on Nano copper oxide

Document Type: Original Paper

Authors

1 Department of Chemistry, Firoozabad Branch, Islamic Azad University, Firoozabad, Iran

2 Faculty of Science, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

Abstract

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

Keywords


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