Photocatalytic degradation of textile dye CI Basic Yellow 28 wastewater by Degussa P25 based TiO2


Konecoglu G., Toygun S., KALPAKLI Y. , AKGÜN M.

ADVANCES IN ENVIRONMENTAL RESEARCH-AN INTERNATIONAL JOURNAL, cilt.4, ss.25-38, 2015 (ESCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 4 Konu: 1
  • Basım Tarihi: 2015
  • Doi Numarası: 10.12989/aer.2015.4.1.025
  • Dergi Adı: ADVANCES IN ENVIRONMENTAL RESEARCH-AN INTERNATIONAL JOURNAL
  • Sayfa Sayıları: ss.25-38

Özet

Wastewaters of textile industry cause high volume colour and harmful substance pollutions. Photocatalytic degradation is a method which gives opportunity of reduction of organic pollutants such as dye containing wastewaters. In this study, photocatalytic degradation of C.I. Basic Yellow 28 (BY28) as a model dye contaminant was carried out using Degussa P25 in a photocatalytic reactor. The experiments were followed out at three different azo dye concentrations in a reactor equipped UV-A lamp (365 nm) as a light source. Azo dye removal efficiencies were examined with total organic carbon and UV-vis measurements. As a result of experiments, maximum degradation efficiency was obtained as 100% at BY28 concentration of 50 mg L-1 for the reaction time of 2.5 h. The photodegradation of BY28 was described by a pseudo-first-order kinetic model modified with the langmuir-Hinshelwood mechanism. The adsorption equilibrium constant and the rate constant of the surface reaction were calculated as K-dye = 6.689. 10(-2) L mg(-1) and k(c) = 0.599 mg L-1 min(-1), respectively.