Effect of multi-walled carbon nanotubes (MWCNT) addition on chemical oxygen demand (COD) removal by electrocoagulation from landfill leachate

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Keyif S., Akdemir A., Akdemir U. O.

DESALINATION AND WATER TREATMENT, cilt.324, 2025 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 324
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.dwt.2025.101405
  • Dergi Adı: DESALINATION AND WATER TREATMENT
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Biotechnology Research Abstracts, CAB Abstracts, Environment Index, Geobase, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

The effect of nanomaterial addition on COD removal from leachate by electrocoagulation was investigated. In this study, COD removal in leachate was realized in a batch reactor according to the changes in adsorbent dosage and retention time. The effect of multi-walled carbon nanotube addition on the treatment efficiency of COD removal under optimum conditions (0.8 A current, Fe-Fe electrode, pH=6, 250 rpm mixing speed and 40 min contact time) was investigated. The highest COD removal of 32.89 % was obtained with 1 mg MWCNT at 0.8 A current, Fe-Fe electrode, pH= 6, 250 rpm mixing speed and 40 min contact time with a volume of 800 ml. According to the high coefficient of determination, the most appropriate isothermal models are Temkin, FloryHuggins, Jovanovic, Dubinin-Radushkevich, Flory Huggins, Fowler Guggenheim, Jovanovic, Harkin-Jure, and Haisey. Statistical analysis showed that CNT addition had a significant effect on COD removal and that pH and temperature had the greatest effect on this effect. As a result, it was suggested that the added nanomaterial should be functionalised for high treatment efficiency in COD removal.