Treatment of Simulated Ink Effluents from Flexographic Printing Unit by Direct Oxidation Method

Document Type : Compilation

Authors

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

2 Department of Applied Chemistry, Karaj Branch, Islamic Azad University, Karaj, Iran.

Abstract

In this research, the effective factors in the treatment of effluent from the flexographic printing unit by direct oxidation have been investigated by potassium ferrate as an oxidizing agent.Today, the use of water-based ink (dyes) used in the flexographic printing industry is also increasing, therefore to the same extent, the amount of wastewater from this industry is very high and the need for purification of this wastewater is evident. In this study, two types of water-based dyes, including acid-red33 (R33)dye and violet cationic 16(V16), were used as representative dyes in simulated flexographic printingwastewater.Based on the results, the removal of dye from the simulated wastewaterof flexographic printing  unit was studied at the laboratory scale and the effect of important operational parameters such as initial dye concentration in the wastewater, pH, potassium ferrate dosage and oxidation time for dye removal were examined.The best removal efficiency of the simulated wastewater is obtained at the initial dye concentration of 100 mg/L and pH = 5, which is done after a maximum of 10 minutes oxidation time using the 3mg/L potassium ferrate, therefore the percent dye removal efficiency of the V16  and R33dye was respectively, 99% and 80%. Also the COD removal percent was 90% and 76% for V16 and R33 dye .The results show that using potassium ferrate as an oxidizing agentin the shortest time, access to high removal efficiency and degradation of dyesare demonstrated, which indicates the beneficial effect of using this oxidizing agent in the green chemistry group.

Keywords

References

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Packaging Science and Art
Volume 9, Issue 35 - Serial Number 35
September 2019
Pages 38-43

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History

  • Receive Date: 22 May 2018
  • Revise Date: 19 February 2019
  • Accept Date: 22 November 2018

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