Simple Catalytic Approach for Removal of Analytical Interferences Caused by Hydrogen Peroxide in a Standard Chemical Oxygen Demand Test

Landfill leachate is a hazardous pollutant generated from a landfill site. Discharge of landfill leachate has caused a major contamination to the environment and detrimental to human health. This chapter introduces an alternative method to treat recalcitrant pollutant in leachate by using ozonation with catalyst. The production of hydroxyl radical in ozonation was not enough to oxidize complex molecular structure in the leachate. Theoretically, the addition of catalyst enhances the capacity of radical and accelerates the chemical reaction. The effectiveness of ozonation with Fenton (O3/Fenton), hydrogen peroxide (O3/H2O2), and zirconium tetrachloride (O3/ZrCl4) in removing pollutant such as chemical oxygen demand (COD), color, and improvement of biodegradability by using this process were also discussed in this chapter. Comparison in term of treatment cost and benefits of the application of chemical as catalyst are briefly elaborated at the end of this chapter.

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The influence of reaction conditions in the oxidation of organic compounds of nuclear laundry water by ozone

Water Science & Technology ◽

10.2166/wst.2010.169 ◽

2010 ◽

Vol 61 (10) ◽

pp. 2557-2561 ◽

Cited By ~ 1

Author(s):

M. K. Vilve ◽

M. E. T. Sillanpää

Keyword(s):

Hydrogen Peroxide ◽

Organic Carbon ◽

Chemical Oxygen Demand ◽

Organic Compounds ◽

Biochemical Oxygen Demand ◽

Treatment Time ◽

Oxygen Demand ◽

Ozone Treatment ◽

Reaction Conditions ◽

Oxidation Of Organic Compounds

This paper presents a summary of degrading organic compounds of nuclear laundry water by ozonation in different conditions of pH, hydrogen peroxide and ultraviolet radiation. The degradation of organic compounds was analysed by chemical oxygen demand (COD), total organic carbon (TOC) and biochemical oxygen demand (BOD). The optimal degradation conditions were at pH 7 with ozone, UV radiation and hydrogen peroxide addition. The transfer of ozone increased significantly, thus resulting in decreased treatment time compared to ozone treatment alone. The reductions of COD, TOC and BOD were 46%, 32% and 70%, respectively.

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DEGRADAÇÃO DO CORANTE AZUL REATIVO 5G PELO PROCESSO OXIDATIVO AVANÇADO UV/H2O2

e-xacta ◽

10.18674/exacta.v9i2.1915 ◽

2016 ◽

Vol 9 (2) ◽

Cited By ~ 2

Author(s):

Denis Rafael de Souza Lima ◽

Isabela Luiza Alves de Almeida ◽

Vanderlei Inácio de Paula

Keyword(s):

Hydrogen Peroxide ◽

Ultraviolet Radiation ◽

Chemical Oxygen Demand ◽

Lactuca Sativa ◽

Azo Dye ◽

Advanced Oxidation Process ◽

Oxidation Process ◽

Oxygen Demand ◽

Liquid Wastes ◽

Optimized Conditions

Neste trabalho avaliou-se a aplicação do processo oxidativo avançado (POA) de foto-peroxidação (UV/H2O2) na degradação do azocorante têxtil comercial Azul Reativo 5G. Foram preparadas soluções sintéticas contendo o corante e tratadas através do respectivo POA, sendo a eficiência do tratamento avaliada através dos seguintes parâmetros: descoloração, redução da demanda química de oxigênio (DQO) e ecotoxicidade com sementes de Lactuca sativa. Após 30 minutos de tratamento em condições otimizadas na presença de peróxido de hidrogênio e radiação ultravioleta, foi observada descoloração na ordem de 91,8% sem redução significativa da DQO (1,8%), além de diminuição da ecotoxicidade da solução, indicando a viabilidade da aplicação do processo UV/H2O2 para tratamento de resíduos líquidos contendo este azocorante.ABSTRACTIn the present paper was evaluated the application of advanced oxidation process (AOP) photo-peroxidation (UV/H2O2) applied to degradation of the commercial textile azo dye Reactive Blue 5G. Synthetic solutions were prepared containing the dye, treated through the respective AOP and the efficiency of the treatment evaluated by the following parameters: discoloration, reduction of chemical oxygen demand (COD) and ecotoxicity with Lactuca sativa seeds. After 30 minutes of treatment in optimized conditions in the presence of hydrogen peroxide and ultraviolet radiation, discoloration was observed in order of 91.8% without significant reduction of COD (1.8%), but decrease in the ecotoxicity of the solution, indicating feasibility of the process UV/H2O2 for treating liquid wastes containing this azo dye.

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Decolorization of industrial wastewater using electrochemical peroxidation process

Journal of Electrochemical Science and Engineering ◽

10.5599/jese.1017 ◽

2021 ◽

Author(s):

Elin Marlina ◽

Purwanto Purwanto ◽

Sudarno Sudarno

Keyword(s):

Hydrogen Peroxide ◽

Chemical Oxygen Demand ◽

Supporting Electrolyte ◽

Paper Industry ◽

Oxygen Demand ◽

Current Intensity ◽

Process Efficiency ◽

Wastewater Sample ◽

Sample Treatment ◽

Reaction Cell

In this study, decolorization of wastewater samples taken from the paper industry is investigated using electrochemical peroxidation process. The electrochemical peroxidation process is a part of electrochemical advanced oxidation processes, which is based on the Fenton’s chemical reaction, provided by addition of external H2O2 into reaction cell. In this study, iron is used as anode and graphite as cathode put at the fixed distance of 30 mm in a glass reaction cell. The cell was filled with the solution containing wastewater and sodium chloride as the supporting electrolyte. Factors of the process such as pH, current intensity, hydrogen peroxide concentration, and time of treatment were studied. The results illustrate that all these parameters affect efficiencies of dye removal and chemical oxygen demand (COD) reducing. The maximal removal of wastewater contaminants was achieved under acid (pH 3) condition, with the applied current of 1 A, and hydrogen peroxide concentration of 0.033 M. At these conditions, decolorization process efficiency reached 100 and 83 % of COD removal after 40 minutes of wastewater sample treatment. In addition, the electrical energy consumption for wastewater treatment by electrochemical peroxidation is calculated, showing increase as the current intensity of treatment process was increased. The obtained results suggest that electrochemical peroxidation process can be used for removing dye compounds and chemical oxygen demand (COD) from industrial wastewaters with high removal efficiency.

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Miniaturized and green method for determination of chemical oxygen demand using UV-induced oxidation with hydrogen peroxide and single drop microextraction

Microchimica Acta ◽

10.1007/s00604-013-1024-5 ◽

2013 ◽

Vol 180 (11-12) ◽

pp. 1029-1036 ◽

Cited By ~ 10

Author(s):

Jeyran Akhoundzadeh ◽

Marta Costas ◽

Isela Lavilla ◽

Mahmoud Chamsaz ◽

Carlos Bendicho

Keyword(s):

Hydrogen Peroxide ◽

Chemical Oxygen Demand ◽

Oxygen Demand ◽

Single Drop ◽

Green Method ◽

Single Drop Microextraction

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Advanced Oxidation Processes and Nanofiltration to Reduce the Color and Chemical Oxygen Demand of Waste Soy Sauce

Sustainability ◽

10.3390/su10082929 ◽

2018 ◽

Vol 10 (8) ◽

pp. 2929 ◽

Cited By ~ 4

Author(s):

Hyun-Hee Jang ◽

Gyu-Tae Seo ◽

Dae-Woon Jeong

Keyword(s):

Hydrogen Peroxide ◽

Chemical Oxygen Demand ◽

Advanced Oxidation Processes ◽

Oxygen Demand ◽

Color Removal ◽

Soy Sauce ◽

Treatment Efficiency ◽

Cod Reduction ◽

Oxidation Processes ◽

Oxidation Efficiency

Currently, the ozone (O3) oxidation efficiency in the treatment of waste soy sauce provides 34.2% color removal and a 27.4% reduction in its chemical oxygen demand (COD). To improve the O3 oxidation efficiency, hydrogen peroxide (H2O2) is used to cause a H2O2/O3 process. In H2O2/O3 process experiments, a previously optimized pH of 11 and applied O3 dose of 50 mg L−1 were used and the H2O2/O3 ratio was varied between 0.1 and 0.9 in intervals of 0.2. The results show that an H2O2/O3 ratio of 0.3 results in the highest efficiencies in terms of color removal (51.6%) and COD reduction (33.8%). Nanofiltration (NF) was used to pretreat the waste soy sauce to improve color removal and COD reduction. The results showed that NF with an NE-70 membrane results in 80.8% color removal and 79.6% COD reduction. Finally, the combination of NF and H2O2/O3 process resulted in the best treatment efficiency: 98.1% color removal and 98.2% COD reduction. Thus, NF & H2O2/O3 process can be considered as one of the best treatment methods for waste soy sauce, which requires high intrinsic color removal and COD reduction efficiencies.

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