An experimental investigation of chemical oxygen demand removal from the wastewater containing oxalic acid using three-phase three-dimensional electrode reactor

The removal of chemical oxygen demand (COD) from wastewater containing oxalic acid was experimentally investigated using a three-phase three-dimensional electrode reactor. The experimental results show that the removal efficiency depends on the applied cell voltage, airflow, electrolysis time and th...

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Bibliographic Details
Published inAdvances in environmental research : an international journal of research in environmental science, engineering and technology Vol. 7; no. 1; pp. 139 - 145
Main Authors Xiong, Ya, Karlsson, Hans T.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.11.2002
Subjects
Chemical Sciences
Electrochemistry
Kemi
Natural Sciences
Naturvetenskap
Oxalic acid
Three-dimensional electrode
Wastewater
Three-dimensional electrode
Electrochemistry
Oxalic acid
Wastewater
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Summary:The removal of chemical oxygen demand (COD) from wastewater containing oxalic acid was experimentally investigated using a three-phase three-dimensional electrode reactor. The experimental results show that the removal efficiency depends on the applied cell voltage, airflow, electrolysis time and the number of repeated runs. The former four factors all had a positive effect while the last factor generally had a negative effect on the COD removal in the experimental range. However, for electrolyses under the conditions of 30.0 V cell voltage, 7.0 l min −1 airflow and 60.0 min, the negative effect was negligible. After 50 runs, the electrochemical reactor could maintain a COD removal efficiency of more than 90%.
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ISSN:1093-0191
1093-7927
DOI:10.1016/S1093-0191(01)00124-1