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Boron-doped diamond anodic treatment of landfill leachate: evaluation of operating variables and formation of oxidation by-products

Anglada Angela , Urtiaga Ane, Ortiz Inmaculada, Mantzavinos Dionysis, Diamantopoulos Evaggelos

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URIhttp://purl.tuc.gr/dl/dias/76188B66-4C1E-4560-926A-9605633143A3-
Αναγνωριστικόhttps://doi.org/10.1016/j.watres.2010.09.017-
Αναγνωριστικόhttp://www.sciencedirect.com/science/article/pii/S0043135410006573-
Γλώσσαen-
Μέγεθος11 pagesen
ΤίτλοςBoron-doped diamond anodic treatment of landfill leachate: evaluation of operating variables and formation of oxidation by-productsen
ΔημιουργόςAnglada Angela en
ΔημιουργόςUrtiaga Aneen
ΔημιουργόςOrtiz Inmaculadaen
ΔημιουργόςMantzavinos Dionysisen
ΔημιουργόςΜαντζαβινος Διονυσηςel
ΔημιουργόςDiamantopoulos Evaggelosen
ΔημιουργόςΔιαμαντοπουλος Ευαγγελοςel
ΕκδότηςElsevieren
ΠερίληψηLandfill leachate with a low BOD/COD ratio was electrochemically oxidized by means of a boron-doped diamond anode. In addition to organic matter removal, this study addressed the issue of formation of both chlorinated organic compounds and nitrate ions as a result of organic matter and ammonia and/or organic nitrogen electro-oxidation in the presence of chloride ions. A factorial design methodology was implemented to evaluate the statistically important operating variables: treatment time (1–4 h), pH (5–8), current intensity (6.3–8.4 A) and addition of chloride (2500–4500 mg L−1). The process was evaluated on COD, total nitrogen (TN) and colour removal, as well as on the formation of nitrate, nitrite and chlorinated organics. Of the four variables studied, treatment time and pH had a considerable influence on COD and colour removal. On the contrary, none of the variables had a significant effect on the elimination of TN for which an average removal of 61 mg L−1 was obtained. The studied variables exhibited different effects on the four groups of organo-chlorinated compounds considered in this study, namely trihalomethanes (THMs), haloacetonitriles (HANs), haloketons (HKs) and 1,2-dichloroethane (DCA). Further analysis at more intense conditions, i.e. current intensity up to 18 A and reaction time up to 8 h revealed that high levels of decolourization (84%) could be achieved followed by low COD (51%) and ammonia (32%) removals. Apart from DCA, the concentration of chlorinated organics increased continuously with treatment time reaching values as high as 1.9 mg L−1, 753 μg L−1 and 431 μg L−1 of THMs, HANs and HKs, respectively.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2015-11-19-
Ημερομηνία Δημοσίευσης2011-
Θεματική ΚατηγορίαElectrolysisen
Θεματική ΚατηγορίαFactorial designen
Βιβλιογραφική ΑναφοράÁ. Anglada, A. Urtiaga, I. Ortiz, D. Mantzavinos and E. Diamadopoulos, "Boron-doped diamond anodic treatment of landfill leachate: evaluation of operating variables and formation of oxidation by-products", Water Res., vol. 45, no. 2, pp. 828-838, Jan. 2011. doi: 10.1016/j.watres.2010.09.017el

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