Back to Search
Start Over
Advanced electrocatalytic pre-treatment to improve the biodegradability of real wastewater from the electronics industry - A detailed investigation study.
- Source :
-
Journal of hazardous materials [J Hazard Mater] 2018 Oct 15; Vol. 360, pp. 552-559. Date of Electronic Publication: 2018 Aug 16. - Publication Year :
- 2018
-
Abstract
- For the first time, real effluents from the micro-electronics industry were treated by paired advanced electrocatalysis, combining electro-Fenton (EF) with anodic oxidation (AO). A detailed characterization of the effluents was performed, showing that isopropanol (IPA) and acetone were the main constituents of the wastewater. Both compounds were completely degraded during the first 120 min of treatment. By monitoring the degradation intermediates, an oxidation pathway was proposed, which includes short-chain carboxylic acids as the main end-organic compounds. While carbon brush served as the cathode, two anode materials were utilized: boron-doped diamond (BDD) and carbon-PTFE cloth (CC). Despite the lower mineralization efficiency showed by CC as compared to BDD (76.5% of TOC removal with CC vs 94.0% of TOC removal with BDD after 4 h), CC showed potential to increase the BOD <subscript>5</subscript> /COD ratio of the effluent that reached 0.7 after only 45 min (0.6 in 30 min with BDD). These results suggest that the electrolysis time could be kept short, improving the cost-effectiveness of the process, especially if CC is used. Overall, the results point out the suitability of advanced electrocatalysis to treat real electronics wastewater with low energy requirements, short treatment times and cost-effective electrode materials.<br /> (Copyright © 2018 Elsevier B.V. All rights reserved.)
- Subjects :
- 2-Propanol chemistry
2-Propanol metabolism
Acetone chemistry
Acetone metabolism
Biodegradation, Environmental
Boron chemistry
Catalysis
Diamond chemistry
Electrodes
Wastewater
Water Pollutants, Chemical metabolism
Electrochemical Techniques
Electronic Waste
Waste Disposal, Fluid methods
Water Pollutants, Chemical chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1873-3336
- Volume :
- 360
- Database :
- MEDLINE
- Journal :
- Journal of hazardous materials
- Publication Type :
- Academic Journal
- Accession number :
- 30145482
- Full Text :
- https://doi.org/10.1016/j.jhazmat.2018.08.023