The Fered-Fenton process using Ti sheet as cathode and RuO2/Ti as anode was employed for the pretreatment of dry-spun acrylic fiber manufacturing wastewater. The effects of feeding mode and concentration of H2O2 on chemical oxygen demand (COD) removal efficiency as well as the biodegradability variation during the Fered-Fenton process were investigated. The feeding mode of H2O2 had significant influence on COD removal efficiency: the removal efficiency was 44.8% if all the 60.0 mM H2O2 was fed at once, while it could reach 54.1% if the total H2O2 was divided into six portions and fed six times. The biochemical oxygen demand/COD ratio increased from 0.29 to above 0.68 after 180 min treatment. The transformation characteristics of organic pollutants during the Fered-Fenton process were evaluated by using gas chromatography–mass spectrometry (GC-MS), Fourier transform infrared spectroscopy (FTIR) and fluorescence excitation–emission matrix (EEM) spectroscopy. Most of the refractory organic pollutants with aromatic structure or large molecular weight were decomposed during the Fered-Fenton process.
Transformation characteristics of organic pollutants in Fered-Fenton process for dry-spun acrylic fiber wastewater treatment
Jian Wei, Yonghui Song, Xiaoguang Meng, Xiang Tu, Jean-Stéphane Pic; Transformation characteristics of organic pollutants in Fered-Fenton process for dry-spun acrylic fiber wastewater treatment. Water Sci Technol 1 December 2014; 70 (12): 1976–1982. doi: https://doi.org/10.2166/wst.2014.441
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