Influence of the boron doping level on the electrochemical oxidation of raw landfill leachates: advanced pre-treatment prior to the biological nitrogen removal - Publikacja - MOST Wiedzy

Wyszukiwarka

Influence of the boron doping level on the electrochemical oxidation of raw landfill leachates: advanced pre-treatment prior to the biological nitrogen removal

Abstrakt

The electrochemical oxidative treatment of landfill leachates (LLs) containing high amounts of ammonia nitrogen and organic matter was used as a promising method, prior to biological processes, to achieve the final effluent quality that would be acceptable by current regulations. The deposited boron-doped diamond electrodes (BDDs) with different boron doping concentrations (10000, 5000 and 500 ppm of B) were applied as anodes. The results showed that the boron doping level influences the electrochemical activity and selectivity of electrode surface due to a decrease in the sp3/sp2 ratio of the BDD material. Special attention was paid to the oxidation efficiency of organic matter (COD = 4225 mg O2/L, BOD = 366 mg O2/L) and ammonia (2270 mg N-NH4+/dm3) in the investigated LLs. Additionally, bisphenol A (BPA; 1539.6 μg/L), a suspected endocrine disruptor, was studied as a potential indicator of the removal efficiency of micropollutants. It was found that the oxidation of BPA and BOD are correlated with the sp3/sp2 ratio, while a decrease in the sp3/sp2 ratio of the BDD material was associated with the elevated efficiency of N-NH4+ removal. Low pH and the addition of Fe(II) salts suppressed the oxygen evolution reaction, and overcame the mass transport limitation of organics in the case of •OH-mediated oxidation. Regarding the elimination of ammonium nitrogen, lower effectiveness was generally achieved in comparison to the COD removal. The maximum removal of COD and ammonium nitrogen reached 79 and 41%, respectively. These values were much higher than those reported in the previous study involving a single-cell flow reactor. Thus, anaerobic ammonium oxidation (Anammox) processes seem to be a reasonable option as a final step of LL treatment.

Cytowania

  • 9

    CrossRef

  • 0

    Web of Science

  • 1 1

    Scopus

Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
CHEMICAL ENGINEERING JOURNAL nr 334, strony 1074 - 1084,
ISSN: 1385-8947
Język:
angielski
Rok wydania:
2018
Opis bibliograficzny:
Fudala-Książek S., Sobaszek M., Łuczkiewicz A., Pieczyńska A., Ofiarska A., Fiszka-Borzyszkowska A., Sawczak M., Ficek M., Bogdanowicz R., Siedlecka E.: Influence of the boron doping level on the electrochemical oxidation of raw landfill leachates: advanced pre-treatment prior to the biological nitrogen removal// CHEMICAL ENGINEERING JOURNAL. -Vol. 334, (2018), s.1074-1084
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.cej.2017.09.196
Weryfikacja:
Politechnika Gdańska

wyświetlono 24 razy

Publikacje, które mogą cię zainteresować

Meta Tagi