Aqueous p-nitrotoluene oxidation induced with direct glow discharge plasma |
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Authors: | Jinzhang Gao Yongjun Liu Wu Yang Lumei Pu Jie Yu Quanfang Lu |
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Institution: | (1) Chemistry Department, Northwest Normal University, 730070 Lanzhou, People's Republic of China |
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Abstract: | A plasma induced degradation process has been studied to treat 4-nitrotoluene (4-NT) present as an aqueous pollutant. The
plasma was locally generated from a glow discharge around a tip of a platinum anode in an electrolytic solution. The influence
of initial pH and Fe2+ on the degradation was examined. Major intermediates resulting from the degradation process were identified. Amongst the
aromatic intermediates, p-hydroxybenzoic acid was the predominant degradation product. The formation of oxalic acid, malic
acid was also observed. The final products of degradation were NH
4
+
, NO
3
−
and CO2. Based on the analysis of intermediates and the kinetic considerations, the degradation was shown to follow a pseudo-first
order reaction hence, a possible reaction pathway was proposed. |
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Keywords: | Glow discharge plasma oxidation p-nitrotoluene wastewater |
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