Investigation the Influence of Different Salts on the Degradation of Organic Dyes Using Non-Thermal Plasma

Ahmed El-Tayeb, Ahmed H. El-Shazly and Marwa F. Elkady
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Ahmed El-Tayeb: Electric Engineering Department, Faculty of Energy Engineering, Aswan University, Aswan 81528, Egypt
Ahmed H. El-Shazly: Chemical and Petrochemicals Engineering Department, Egypt-Japan University of Science and Technology, New Borg El-Arab City, Alexandria 21934, Egypt
Marwa F. Elkady: Chemical and Petrochemicals Engineering Department, Egypt-Japan University of Science and Technology, New Borg El-Arab City, Alexandria 21934, Egypt

Energies, 2016, vol. 9, issue 11, 1-19

Abstract: In dye decolorization tests a non-thermal plasma (NTP) corona discharge generated by a high voltage pin-to-ground plate displayed 82% color removal within 11 min. Total color removal was accomplished after 28 min. Different salts such as KCl, NaCl, CaCl 2 and AlCl 3 were utilized to check the influence of conductivity changes on the dye decolorization process. Higher dye solution conductivity improved the color removal efficiency. The discharge energy and degradation efficiency were computed for diverse concentrations for NaCl, KCl, CaCl 2 and AlCl 3 , whereby it was noticed that the salts generally have a small impact on the level of dye decolorization using corona discharge. In addition, the essential reactive species involved in the oxidation of organic dye compounds such as ozone (O 3 ) generated in treated water and hydrogen peroxide (H 2 O 2 ) were investigated and the energetic species that produced the non-thermal plasma at the optimum operation time were determined. Energy yields for decolorization and Electrical Energy per Order (EE/O) were calculated for different concentrations of NaCl, KCl, CaCl 2 and AlCl 3 . This work may help in designing plasma systems appropriate for treatment of industrial wastewaters polluted by dyes.

Keywords: non-thermal plasma (NTP); wastewater treatment; corona discharge; dye decolorization; ozone generation; pin-to-plate (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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