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Biochar production by sewage sludge pyrolysis

Agrafioti Evanthia, Bouras George, Kalderis Dimitrios, Diamantopoulos Evaggelos

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URIhttp://purl.tuc.gr/dl/dias/6C799174-073D-4E8A-B032-347D6A75B21B-
Αναγνωριστικόhttps://doi.org/10.1016/j.jaap.2013.02.010-
Γλώσσαen-
ΤίτλοςBiochar production by sewage sludge pyrolysisen
ΔημιουργόςAgrafioti Evanthiaen
ΔημιουργόςΑγραφιωτη Ευανθιαel
ΔημιουργόςBouras Georgeen
ΔημιουργόςKalderis Dimitriosen
ΔημιουργόςΚαλδερης Δημητριοςel
ΔημιουργόςDiamantopoulos Evaggelosen
ΔημιουργόςΔιαμαντοπουλος Ευαγγελοςel
ΕκδότηςElsevieren
ΠερίληψηSewage sludge was pyrolyzed in order to assess the effect of pyrolysis temperature, residence time and biomass chemical impregnation on the yield of biochar production. The pyrolysis temperature was a key factor affecting biochar yield, while the highest yield was obtained at a temperature of 300 °C. Biochar surface area increased with increasing pyrolysis temperature and was maximized (90 m2/g) by impregnating biochar with K2CO3. Raw sewage sludge, as well as biochar samples, were subjected to leaching tests in order to investigate the potential release of heavy metals. Pyrolysis suppressed heavy metal release for the non-impregnated biochars, indicating that there is no environmental risk using sludge-derived biochars as soil amendments. Although K2CO3 and H3PO4 impregnation enhanced the solubility of specific heavy metals, the concentrations in the leachates were low. Biochar impregnated with K2CO3 released 85.7% of its potassium content, whereas orthophosphates were bound strongly in the biochar matrix impregnated with H3PO4. The non impregnated biochar was subjected to batch kinetic experiments in order to examine its ability to adsorb As(V) and Cr(III). Biochar removed approximately 70% of Cr(III) at equilibrium time, whereas only 30% of As(V) was adsorbed onto biochar surface, implying that biochar is more efficient in removing cations than anions from aqueous solutions.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2015-11-19-
Ημερομηνία Δημοσίευσης2013-
Θεματική ΚατηγορίαBiocharen
Θεματική ΚατηγορίαPyrolysisen
Βιβλιογραφική ΑναφοράE. Agrafioti, G. Bouras, D. Kalderis and E. Diamadopoulos, "Biochar production by sewage sludge pyrolysis," J. Anal. Appl. Pyrolysis, vol. 101, pp. 72-78, May 2013. doi: 10.1016/j.jaap.2013.02.010en

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