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Influence of Molecular Size on the Electrochemical Oxidation of Fractioned Cork Boiling Wastewater
Author(s) -
Fernandes Annabel,
Gomes Arlindo C.,
Pereira Christopher,
Magdziak Anna,
Pacheco Maria J.,
Ciríaco Lurdes,
Simões Rogério,
Lopes Ana
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201801750
Subject(s) - biodegradation , chemistry , cork , boiling , fraction (chemistry) , wastewater , ultrafiltration (renal) , electrochemistry , chromatography , fractionation , anode , electrolyte , nuclear chemistry , chemical engineering , organic chemistry , electrode , waste management , biochemistry , engineering
The performance of electrochemical oxidation (EO) using a boron doped diamond (BDD) anode was assessed for cork boiling wastewater (CBW) molecular size fractions of >100 kDa, 50–100 kDa, 20–50 kDa, 10–20 kDa and <10 kDa, obtained through sequential use of ultrafiltration (UF) membranes. The best EO results were found in the experiments performed with no addition of supporting electrolyte and at the lowest applied stirring speed, the more economical and environmentally friendly conditions. The highest EO treatment efficiency was observed for the fraction >100 kDa, which presented also the highest organic load. EO treatment led to an increase in the biodegradability of the fraction >100 kDa and to a decrease in the biodegradability of the fraction <10 kDa. Moreover, samples toxicity was not affected by the EO process, suggesting that the treated samples can be forwarded to biological post‐treatment processes. UF fractionation showed to be advantageous in combination with EO, since it enables the selective use of EO where it is more effective regarding biodegradability and current efficiency.