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Desalination and Water Treatment Volume 57, 2016 - Issue 42
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Articles

Degradation behavior and kinetics of dinitrotoluene in simulated wastewater by iron–carbon microelectrolysis

Weizhou JiaoShanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan030051, Shanxi, China, Tel. +86 351 3921986; Fax: +86 351 3921497;Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan030051, Shanxi, ChinaCorrespondence[email protected]
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Lisheng YuShanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan030051, Shanxi, China, Tel. +86 351 3921986; Fax: +86 351 3921497;Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan030051, Shanxi, China
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Youzhi LiuShanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan030051, Shanxi, China, Tel. +86 351 3921986; Fax: +86 351 3921497;Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan030051, Shanxi, China
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Zhirong FengShanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan030051, Shanxi, China, Tel. +86 351 3921986; Fax: +86 351 3921497;Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan030051, Shanxi, China
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Wenli LiuShanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan030051, Shanxi, China, Tel. +86 351 3921986; Fax: +86 351 3921497;Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan030051, Shanxi, China
Pages 19975-19980 | Received 08 Jan 2015, Accepted 06 Oct 2015, Published online: 29 Oct 2015
 
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Abstract

Dinitrotoluene (DNT) removal strategies suffer from high costs or slow conversion rates. The effects of initial pH, mass ratio of iron–carbon, mass concentration of anhydrous sodium sulfate, and residence time on DNT removal rate were investigated. Results showed that the degradation efficiency of DNT reached 55.98% under the optimum conditions: an initial value of pH 3, an iron dosage of 10 g/L, a mass ratio of iron–carbon of 1, and a Na2SO4 concentration of 200 mg/L. The degradation kinetics of DNT by iron–carbon micro-electrolysis in the studied temperature range was a pseudo-first-order reaction.

Acknowledgements

This work was supported by the Excellent Youth Science and Technology Foundation of Province Shanxi of China (2014021007) and Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi (201316).

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