Treatment of Jewelry Manufacturing Effluent Containing Cyanide Using Ozone-Based Photochemical Advanced Oxidation Processes

KIRIL MERT B., Sivrioglu O., YONAR T., Ozciftci S.

OZONE-SCIENCE & ENGINEERING, cilt.36, sa.2, ss.196-205, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 36 Sayı: 2
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1080/01919512.2013.860354
  • Dergi Adı: OZONE-SCIENCE & ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.196-205
  • Anahtar Kelimeler: H2O2, Advanced Oxidation Processes, Cyanide, Jewelry Manufacturing Effluent, Ozone, UV, WASTE-WATER, HYDROGEN-PEROXIDE, AQUEOUS-SOLUTION, REMOVAL, DEGRADATION, DECOMPOSITION, TECHNOLOGIES, DESTRUCTION, OZONATION
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

This article considers Advanced Oxidation Processes involving O-3, O-3/UV, O-3/H2O2/UV, and H2O2/UV to destroy cyanide in jewelry manufacturing wastewaters. All experiments were performed in a semibatch reactor. The results showed that total cyanide can be reduced with different reaction rates, and the decrease of total cyanide can be described by pseudo-first-order kinetics. The reaction was performed under different pH values and H2O2 dosages to find the optimal conditions for the oxidation processes. The ozonation process destroyed total cyanide faster at a pH = 12, whereas ozonation combined with H2O2 and/or UV destroyed cyanide faster at a pH =10. The total cyanide destruction rate in the UV/H2O2 (700 mg/L) treatment was the highest among all studied processes, with removal efficiencies of 99% for CN-, 99% for COD and 99% for TOC.