RT Journal Article
T1 Remediation of groundwater polluted with lindane production wastes by conductive-diamond electrochemical oxidation
A1 Herraiz Carboné, Miguel
A1 Santos López, Aurora
A1 Hayat, Ana
A1 Domínguez Torre, Carmen María
A1 Cotillas Soriano, Salvador
AB This work studies the remediation of groundwater saturated with dense non-aqueous phase liquid (DNAPL) from lindane production wastes by electrochemical oxidation. DNAPL-saturated groundwater contains up to 26 chlorinated organic compounds (COCs), including different isomers of hexachlorocyclohexane (HCH). To do this, polluted groundwater was electrolysed using boron-doped diamond (BDD) and stainless steel (SS) as anode and cathode, respectively, and the influence of the current density on COCs removal was evaluated in the range from 5 to 50 mA cm−2. Results show that current densities higher than 25 mA cm−2 lead to the complete removal and mineralisation of all COCs identified in groundwater. The higher the current density, the higher the COCs removal rate. At lower current densities (5 mA cm−2), chlorobenzenes were completely removed, and degradations above 90 % were reached for COCs with more than five chlorine atoms in their molecules. The use of BDD anodes promotes the electrochemical generation of powerful reactive species, such as persulfate, hypochlorite or hydroxyl radicals, that contribute to the degradation and mineralisation of COCs. The applied current density also influences the generation of these species. Finally, no acute toxicity towards Vibrio fischeri was observed for the treated groundwater after the electrochemical oxidation performed at 5 and 10 mA cm−2. These findings demonstrate that electrochemical oxidation with BDD anodes at moderate current densities is a promising alternative for the remediation of actual groundwater contaminated with DNAPLs.
PB Elsevier
SN 0048-9697
YR 2024
FD 2024-05
LK https://hdl.handle.net/20.500.14352/121302
UL https://hdl.handle.net/20.500.14352/121302
LA eng
NO Herraiz-Carboné, M.; Santos, A.; Hayat, A.; Domínguez, C. M.; Cotillas, S. Remediation of Groundwater Polluted with Lindane Production Wastes by Conductive-Diamond Electrochemical Oxidation. Science of The Total Environment 2024, 926, 171848. https://doi.org/10.1016/j.scitotenv.2024.171848.
NO This research is part of the project PID2022-137828OB-I00 (EMULREM) funded by MCIN/AEI/10.13039/501100011033 and by ERDF/EU. Dr. Miguel Herraiz-Carboné gratefully acknowledges the grant FJC2021-047911-I funded by MCIN/AEI/10.13039/501100011033 and by European Union NextGenerationEU/PRTR. Ana Hayat also acknowledges the CT19/23-INVM-44 grant financed by the INVESTIGO program of the Spanish Ministry of Labor and Social Economy.
NO Ministerio de Ciencia, Innovación y Universidades (España)
NO Fondo Europeo de Desarrollo Regional (UE)
NO Ministerio de Trabajo y Economía Social (España)
DS Docta Complutense
RD 16 dic 2025