Effect of surfactants on remazol blue bioremoval capacity of Rhizopus arrhizus strain growing in molasses medium

Gül Ü. D., DÖNMEZ G.

Fresenius Environmental Bulletin, cilt.20, sa.10 A, ss.2677-2683, 2011 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 20 Sayı: 10 A
  • Basım Tarihi: 2011
  • Dergi Adı: Fresenius Environmental Bulletin
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2677-2683
  • Anahtar Kelimeler: Decolorization, Molasses, Remazol blue, Rhizopus arrhizus, Surfactant
  • Ankara Üniversitesi Adresli: Evet

Özet

The effect of an anionic surfactant, dodecylbenzenesulfonate (DBS), and a cationic one, dodecyl trimethyl ammonium bromide (DTAB), on Remazol Blue bioremoval by a Rhizopus arrhizus strain growing in molasses medium was examined. DBS inhibited but DTAB enhanced decolorization. DTAB impact was investigated as a function of pH, dye and surfactant concentrations. Maximum bioremoval occurred at pH 6 when examining pH range 3-7. Dye concentrations of 50 to 800 mg/L were investigated, and bioremoval rates were 89.9 and 85.9% in 50 and 100 mg/L dye with 0.5 mM DTAB. The effects of surfactant concentration were tested with 0.1, 0.5, 1 and 2 mM DTAB, and maximum decolorization was observed with 1 mM DTAB (97.1 and 52.8% in 100 and 800 mg/L dye). The fungus has shown a maximum dye uptake capacity of 30.22 or 27.22 mg per g of dry cells with 0.5 or 1 mM DTAB. DTAB increased bioremoval rates, and surfactant induced decolorization technology is a feasible approach for wastewater treatment. © by PSP.