Landfill leachate is one of the most recalcitrant wastes for biotreatment and can be considered a potential source of contamination to surface and groundwater ecosystems. In the present study, Fenton oxidation was employed for degradation of stabilized landfill leachate. Response surface methodology was applied to analyze, model and optimize the process parameters, i.e. pH and reaction time as well as the initial concentrations of hydrogen peroxide and ferrous ion. Analysis of variance showed that good coefficients of determination were obtained (R2 > 0.99), thus ensuring satisfactory agreement of the second-order regression model with the experimental data. The results indicated that, pH and its quadratic effects were the main factors influencing Fenton oxidation. Furthermore, antagonistic effects between pH and other variables were observed. The optimum H2O2 concentration, Fe(II) concentration, pH and reaction time were 0.033 mol/L, 0.011 mol/L, 3 and 145 min, respectively, with 58.3% COD, 79.0% color and 82.1% iron removals.
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Research Article|
October 01 2011
Multiple responses analysis and modeling of Fenton process for treatment of high strength landfill leachate
Soraya Mohajeri;
Soraya Mohajeri
1School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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Hamidi Abdul Aziz;
1School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
E-mail: cehamidi@eng.usm.my
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Mohammed Ali Zahed;
Mohammed Ali Zahed
1School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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Leila Mohajeri;
Leila Mohajeri
1School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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Mohammed J. K. Bashir;
Mohammed J. K. Bashir
1School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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Shuokr Qarani Aziz;
Shuokr Qarani Aziz
1School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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Mohd Nordin Adlan;
Mohd Nordin Adlan
1School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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Mohamed Hasnain Isa
Mohamed Hasnain Isa
2Civil Engineering Department, Universiti Teknologi PETRONAS, 31750 Tronoh, Perak, Malaysia
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Water Sci Technol (2011) 64 (8): 1652–1660.
Article history
Received:
September 22 2010
Accepted:
December 02 2010
Citation
Soraya Mohajeri, Hamidi Abdul Aziz, Mohammed Ali Zahed, Leila Mohajeri, Mohammed J. K. Bashir, Shuokr Qarani Aziz, Mohd Nordin Adlan, Mohamed Hasnain Isa; Multiple responses analysis and modeling of Fenton process for treatment of high strength landfill leachate. Water Sci Technol 1 October 2011; 64 (8): 1652–1660. doi: https://doi.org/10.2166/wst.2011.489
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