Electrochemical oxidation of landfill leachate using boron-doped diamond anodes: pollution degradation rate, energy efficiency and toxicity assessment

Barbara Wilk; Małgorzata Szopińska; Michał Sobaszek; Mattia Pierpaoli; Agata Błaszczyk; Aneta Łuczkiewicz; Sylwia Fudala-Książek

doi:10.1007/s11356-022-19915-3

Electrochemical oxidation of landfill leachate using boron-doped diamond anodes: pollution degradation rate, energy efficiency and toxicity assessment

Abstrakt

Electrochemical oxidation (EO), due to high efficiency and small carbon footprint, is regarded as an attractive option for on-site treatment of highly contaminated wastewater. This work shows the effectiveness of EO using three boron-doped diamond electrodes (BDDs) in sustainable management of landfill leachate (LL). The effect of the applied current density (25–100 mA cm−2) and boron doping concentration (B/C ratio: 500 ppm, 10,000 ppm and 15,000 ppm) on the performance of EO was investigated. It was found that, of the electrodes used, the one most effective at COD, BOD20 and ammonia removal (97.1%, 98.8% and 62%, respectively) was the electrode with the lowest boron doping. Then, to better elucidate the ecological role of LLs, before and after EO, cultivation of faecal bacteria and microscopic analysis of total (prokaryotic) cell number, together with ecotoxicity assay (Daphnia magna, Thamnocephalus platyurus and Artemia salina) were combined for the two better-performing electrodes. The EO process was very effective at bacterial cell inactivation using each of the two anodes, even within 2 h of contact time. In a complex matrix of LLs, this is probably a combined effect of electrogenerated oxidants (hydroxyl radicals, active chlorine and sulphate radicals), which may penetrate into the bacterial cells and/or react with cellular components. The toxicity of EO-treated LLs proved to be lower than that of raw ones. Since toxicity drops with increased boron doping, it is believed that appropriate electrolysis parameters can diminish the toxicity effect without compromising the nutrient-removal and disinfection capability, although salinity of LLs and related multistep-oxidation pathways needs to be further elucidated.

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Autorzy (7)

Barbara Wilk
Małgorzata Szopińska dr inż.
Michał Sobaszek dr hab. inż.
Mattia Pierpaoli dr
Agata Błaszczyk Dr
- Uniwersytet Gdański
Aneta Łuczkiewicz prof. dr hab. inż.
Sylwia Fudala-Książek dr hab. inż.

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Wersja publikacji: Accepted albo Published Version
DOI:: Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1007/s11356-022-19915-3
Licencja: Copyright (2022 Springer-Verlag GmbH Germany)

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Kategoria:

Publikacja w czasopiśmie

Typ:

artykuły w czasopismach

Opublikowano w:

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH nr 29, strony 65625 - 65641,
ISSN: 0944-1344

Język:

angielski

Rok wydania:

2022

Opis bibliograficzny:

Wilk B., Szopińska M., Sobaszek M., Pierpaoli M., Błaszczyk A., Łuczkiewicz A., Fudala-Książek S.: Electrochemical oxidation of landfill leachate using boron-doped diamond anodes: pollution degradation rate, energy efficiency and toxicity assessment// ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH -Vol. 29, (2022), s.65625-65641

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