BIODEGRADATION OF SIMAZINE BY RHODOCOCCUS RHODOCHROUS: KINETIC MODELING

EKER S., Uyar C. C.

FRESENIUS ENVIRONMENTAL BULLETIN, cilt.25, sa.1, ss.113-120, 2016 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 25 Sayı: 1
  • Basım Tarihi: 2016
  • Dergi Adı: FRESENIUS ENVIRONMENTAL BULLETIN
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Sayfa Sayıları: ss.113-120
  • Anahtar Kelimeler: Biodegradation, inhibition, kinetic model, Rhodococcus rhodochrous, simazine, micropollutants, GRANULAR ACTIVATED CARBON, WASTE-WATER, BATCH CULTURE, DEGRADATION, PESTICIDES, HERBICIDE, REMOVAL, 2,4-DICHLOROPHENOL, PLASTICIZERS, INOCULATION
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Biodegradation of simazine by pure culture of Rhodococcus rhodochrous (DSM 43241) was studied in batch culture. Biodegradation experiments were carried out at different initial simazine concentrations between 0.886 and 4.967 mgL(-1) in the presence of basal salts medium containing glucose. A significant decrease in the percent removal of simazine was observed with increasing initial simazine concentrations due to toxic effects of simazine. Degradation rate of simazine increased with the initial simazine concentration up to 2.7 mg L-1 and decreased with further increases. A non-competitive inhibition model was used to correlate the experimental data and to determine the kinetic constants which were found to be k = 0.055 mg-simazine gX(-1)h(-1), K-S = 5.50 mgL (-1) and K-SI = 3.6 mgL(-1). Rhodococcus rhodochrous was found to be very effective for biodegradation of simazine with potential use in biological treatment of pesticide containing wastewaters.