Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 81, Issue 3, Pages 444-450Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2011.08.023
Keywords
Fenton; Electro-Fenton; Coking wastewater; Response surface methodology; Box-Behnken design
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Funding
- Ministry of Science and Technology of China [2009AA06Z309]
- Major Science and Technology Project of Jiaxing [2010AZ1034]
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In this study, Fenton and electro-Fenton were employed to treat biologically stabilized coking wastewater, i.e. the effluent of a biological coking wastewater treatment. The Box-Behnken experimental design (BBD) and response surface methodology (RSM) were used to design and optimize the performance of both processes. The regression quadratic model describing the TOC removal efficiency of Fenton and electro-Fenton process was developed and validated by the analysis of variances (ANOVA), respectively. The significance levels of linear and interaction effects of the reaction parameters on processes efficiencies were obtained. The optimum parameters were determined as pH 4, 1.2 h reaction time, 40 mM of Fe(2+) and H(2)O(2) for Fenton reaction; and pH 4, 1.8 h reaction time, 0.6 mM of Fe(2+) and 3.7 mA/cm(2) of current density for electro-Fenton. The corresponding TOC removal efficiencies were about 75% and 55% for Fenton and electro-Fenton, respectively. Both Fenton and electro-Fenton are effective in advanced treatment for coking wastewater, and the response surface methodology is suitable for the design and optimization of the processes. (C) 2011 Elsevier B.V. All rights reserved.
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