The Effect of H2O2 Interference in Chemical Oxygen Demand Removal During Advanced Oxidation Processes

Afsane Chavoshani, Aezam Rostami, Fahimeh Golzari, Ameneh Gholinia


Hydrogen peroxide (H2O2) is one of the most oxidants in AOPs. By H2O2 dissociation, hydroxyl radical with a standard oxidation potential of 2.7 is produced. It is reported H2O¬ residual in AOPs has been led to interference in chemical oxygen demand (COD) test and it is able to hinder biological treatment of waste water. Because of high mixed organic load of solid waste leachate, this study investigated effect of H2O2 interference in COD removal from solid waste leachate.
In this study effect of parameters such as pH (3,5,7,12), H2O2 dose (0.01, 0.02, 0.03, 0.04 mol l-1), and time reaction(10,20,30,40,50,60 min) evaluated on H2O2 interference in COD removal from solid waste leachate.
Optimum pH and concentration were 3 and 0.02 moll-1 respectively. With increasing reaction time, COD removal was increased. The false COD obtained between 0.49mg per 1mg of H2O2. The average of COD removal by H2O2 for 60 min was 6.57%. Also reaction rate of this process was 0.0029 min-1.
The presence of H2O2 leads to overestimation of COD values after reaction time because it consumes the oxidation agent. The extent of H2O2 interference in COD analysis was proportional to the remaining H2O2 concentration at the moment of sampling.


Hydrogen peroxide, Interference, COD, Leachate, Gonabad

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Asgari G, Seidmohammadi A, Chavoshani A. Microwave/H2O2 Efficiency in Pentachlorophenol Removal from Aqueous Solutions, JRHS 2014;14(1):36-39.

Asgari G, Seidmohammadi A, Chavoshani A. Pentachlorophenol removal from aqueous solutions by microwave/persulfate and microwave/H2O2: a comparative kinetic study, IJEHSE. 2014;12(94):1-7.

Wu T, Englehardt JD. A new method for removal of hydrogen peroxide interference in the analysis of chemical oxygen demand, Environ Sci Technol. 2012;46(4):2291-8.

Pleczykolan B, Barbusinsk K, Plonka I. COD removal from landfill leachate using H2O2, UV radiation and combination these processes, Environ Pro Engin. 2012;38(3):5-13.

Lee E, LeeH, Kim YK, Sohn K, Lee K. Hydrogen peroxide interference in chemical oxygen demand during ozone based advanced oxidation of anaerobically digested livestock wastewater, Int J Environ Sci Tech, 2011;8(2):381-88.

Rezaeei A, Ghaneian MT, Hashemian SJ, Mousavi G, Ghanizadeh G. Interference of Potassium Persulphate and Hydrogen Peroxide in the COD Test. water and waste water, 2008;19(2):77-81[in persion]

Shabiimam MA, Dikshit AK:Treatment of municipal landfill Leachate by oxidants. Environ Engin, 2012;2(2):1-5.

Deng Y, Ezyske CM. Sulfate radical-advanced oxidation process (SR-AOP) for simultaneous removal of refractory organic contaminants and ammonia in landfill leachate. water Res, 2011;45(18):6189-94.

Kjeldsen P, Barlaz MA, Rooker AP, Baun A, Ledin A, Christensen TH.¬ Present and long-term composition of MSW landfill leachate: a review. Crit Rev Env Sci Tce, 2002;32(4):297-336.

Malakootian M, Jafarzadeh Haghighi fard N, Ahmadian M, Loloei M. Influence of Fenton Process on Treatability of Kerman City Solid Waste Leachate. Iranian J Health & Environ, 2010;3(2):123-34[in persion].

Deng Y, Englehardt JD. Electrochemical oxidation for landfill leachate treatment.¬Waste Manage, 2007;27(3):380-8.

Jorfi SS, Jaafarzadeh N, Kalantary RR, Y.Hashempour.Leachate Treatment by Batch Decant Activated Sludge Process and Powdered Activated Carbon Addition. Iran J Health & Environ, 2009;299(1):16-21[in persion]

Yazdanbakhsh AR, Mohammadi AS, Sardar M, Godini H, Almasian M. COD removal from synthetic waste water containing Azithromycin using combined coagulation and a fenton- like process. Environmental Engn, 2014;13(12):2929-36.

Fahmi MR, Abidin CZA, Rahmat NR. Characteristic of colour and COD removal of Azo Dye by advanced oxidation process and biological treatment. International Conference on Biotechnology and Environment Management; Singapoore2011.

Kang YW, . Cho M J, Hwang KY. Correction of hydrogen peroxide interference onstandard chemical oxygen demand test. WATER RES, 1999; 33(5): 1247-1251.

Iranian Journal of Health, Safety and Environment e-ISSN: :2345-5535 Iran university of Medical sciences, Tehran, Iran