Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Electrochemical treatment of reverse osmosis concentrate onboron-doped electrodes in undivided and divided cell configurations
Autor Bagastyo, A.Y.; Batstone, D.J.; Kristiana, I.; Escher, B.I.; Joll, C.; Radjenovic, J.;
Journal / Serie Journal of Hazardous Materials
Erscheinungsjahr 2014
Department ZELLTOX;
Band/Volume 279
Sprache englisch;
POF III (gesamt) T32;
Keywords Electrochemical oxidation; Reverse osmosis brine; Boron-doped diamond; Electrolytic cell configuration; Vibrio fischeri bioassay; treatment efficacy, in vitro bioassay; Xenobiotic metabolism; Specific modes of action; Adaptive stress response; Bioanalytical equivalent concentration; human health risk
UFZ Querschnittsthemen RU2;
Abstract An undivided electrolytic cell may offer lower electrochlorination through reduction of chlorine/hypochlorite at the cathode. This study investigated the performance of electrooxidation of reverse osmosis concentrate using boron-doped diamond electrodes in membrane-divided and undivided cells. In both cell configurations, similar extents of chemical oxygen demand and dissolved organic carbon removal were obtained. Continuous formation of chlorinated organic compounds was observed regardless of the membrane presence. However, halogenation of the organic matter did not result in a corresponding increase in toxicity (Vibrio fischeri bioassay performed on extracted samples), with toxicity decreasing slightly until 10 Ah L−1, and generally remaining near the initial baseline-toxicity equivalent concentration (TEQ) of the raw concentrate (i.e., ∼2 mg L−1). The exception was a high range toxicity measure in the undivided cell (i.e., TEQ = 11 mg L−1 at 2.4 Ah L−1), which rapidly decreased to 4 mg L−1. The discrepancy between the halogenated organic matter and toxicity patterns may be a consequence of volatile and/or polar halogenated by-products formed in oxidation by OH electrogenerated at the anode. The undivided cell exhibited lower energy compared to the divided cell, 0.25 kWh gCOD−1 and 0.34 kWh gCOD−1, respectively, yet it did not demonstrate any improvement regarding by-products formation.
ID 19324
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=19324
Bagastyo, A.Y., Batstone, D.J., Kristiana, I., Escher, B.I., Joll, C., Radjenovic, J. (2014):
Electrochemical treatment of reverse osmosis concentrate onboron-doped electrodes in undivided and divided cell configurations
J. Hazard. Mater. 279 , 111 - 116