Interference of H<sub>2</sub>O<sub>2</sub> on COD Test and Removal Method for Advanced Oxidation Process

doi:10.11943/j.issn.1006-9941.2014.06.030

Home > Archive>Volume 22, Issue 6, 2014 >867-871. DOI:10.11943/j.issn.1006-9941.2014.06.030

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Interference of H₂O₂ on COD Test and Removal Method for Advanced Oxidation Process

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GUO Liang
GUO Liang
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, North University of China, Taiyuan 030051, China
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JIAO Wei-zhou
JIAO Wei-zhou
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, North University of China, Taiyuan 030051, China
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LIU You-zhi
LIU You-zhi
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, North University of China, Taiyuan 030051, China
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XU Cheng-cheng
XU Cheng-cheng
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, North University of China, Taiyuan 030051, China
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LIU Wen-li
LIU Wen-li
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, North University of China, Taiyuan 030051, China
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LI Jing
LI Jing
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, North University of China, Taiyuan 030051, China
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(Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, North University of China, Taiyuan 030051, China)

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Abstract:

The chemical oxygen demand(COD) for pure water and nitrobenzene waste water sample containing different content of H₂O₂ was measured and the linear interference of H₂O₂ concentration on COD test was studied. It shows that with increase of the H₂O₂, the COD increases. Without new interference, the ways to suppress interference of H₂O₂ on COD test were discussed including pH value, manganese dioxide catalyst, and catalase. Results show that the catalase eliminates the influence of H₂O₂ on COD determination effectively, and the alkaline environment is in favor of removing the H₂O₂ to some extent, and manganese dioxide catalyst can remove H₂O₂ in short time but it may introduce new interferences. When the reaction time is 3 min, by adjusing initial liquid pH value of 12, adding manganese dioxide catalyst and catalase, respectively, the H₂O₂ removal rate can reach 1.2%, 45.6% and 100%, indicating that catalase can conveniently remove H₂O₂ with unknown concentration, and suppress the interference of H₂O₂ on COD test.

Key words:environmental chemistry; nitrobenzene compounds; H₂O₂; Chemical Oxygen Demand(COD); pH; manganese dioxide; catalase

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郭亮,焦纬洲,刘有智,等.高级氧化法中H₂O₂对COD的测定影响及消除[J].含能材料,2014,22(6):867-871.
GUO Liang, JIAO Wei-zhou, LIU You-zhi, et al. Interference of H₂O₂ on COD Test and Removal Method for Advanced Oxidation Process[J]. Chinese Journal of Energetic Materials,2014,22(6):867-871.

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History

Received:January 13,2014
Revised:February 22,2014
Adopted:March 27,2014
Online: December 26,2014
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