Reduction of 2,4-Dinitrotoluene with Graphite and Titanium Mesh Cathodes

Authors: Jolas, J.L.; Pehkonen, S.O.; Maloney, S.W.

Source: Water Environment Research, Volume 72, Number 2, March/April 2000 , pp. 179-188(10)

Publisher: Water Environment Federation

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Abstract:

Electrochemical degradation of 2,4-dinitrotoluene (DNT) in a bench-scale reactor was studied, and a number of parameters including dissolved oxygen, current, voltage, and electrode shape and material were investigated. Quantified rates of degradation ranged from 0.003 to 0.008 min−1 for graphite and 0.003 to 0.06 min−1 for titanium. Products of degradation were identified as diaminotoluene (DAT) and azoxy dimers and, in some cases, were also quantified. An azoxy dimer was found only in experiments with dissolved oxygen, and regioselectivity favoring the first reduction at the para position was evident based on product studies. Degradation studies using a graphite rod cathode were mass-transfer limited, while degradation studies using titanium mesh wire were not. The material of the electrode had a strong influence on degradation rates and on the way that different water quality parameters affect the rate of 2,4-DNT degradation.

Keywords: BYPRODUCTS; DIAMINOTOLUENE; DINITROTOLUENE; ELECTROCHEMICAL; GRAPHITE; REDUCTION; TITANIUM; TOXICITY

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143000X137266

Publication date: March 1, 2000

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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