Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/j.jhazmat.2014.06.060 |
| Title (Primary) | Electrochemical treatment of reverse osmosis concentrate onboron-doped electrodes in undivided and divided cell configurations |
| Author | Bagastyo, A.Y.; Batstone, D.J.; Kristiana, I.; Escher, B.I.; Joll, C.; Radjenovic, J. |
| Source Titel | Journal of Hazardous Materials |
| Year | 2014 |
| Department | ZELLTOX |
| Volume | 279 |
| Page From | 111 |
| Page To | 116 |
| Language | englisch |
| 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 wide themes | 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. |
| Persistent UFZ Identifier | 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 10.1016/j.jhazmat.2014.06.060 |
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