期刊
ENVIRONMENTAL TECHNOLOGY
卷 40, 期 3, 页码 321-328出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2017.1392617
关键词
Chlorine photolysis; experimental design; photo-assisted electrochemical degradation; simulated textile effluent; electrochemical advanced oxidation processes
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico [303892/2015-3, 441614/2014-0]
- Fundacao de Amparo a Pesquisa do Estado de Minas Gerais [APQ-01285-1]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo [2014/02739-6]
The present paper presents the study of (1) the optimization of electrochemical-free chlorine production using an experimental design approach, and (2) the application of the optimum conditions obtained for the application in photo-assisted electrochemical degradation of simulated textile effluent. In the experimental design the influence of inter-electrode gap, pH, NaCl concentration and current was considered. It was observed that the four variables studied are significant for the process, with NaCl concentration and current being the most significant variables for free chlorine production. The maximum free chlorine production was obtained at a current of 2.33A and NaCl concentrations in 0.96moldm(-3). The application of the optimized conditions with simultaneous UV irradiation resulted in up to 83.1% Total Organic Carbon removal and 100% of colour removal over 180min of electrolysis. The results indicate that a systematic (statistical) approach to the electrochemical treatment of pollutants can save time and reagents.
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