Influence of pH and grain size on physicochemical properties of biochar and released humic substances
PBN-AR
Instytucja
Instytut Agrofizyki im. Bohdana Dobrzańskiego Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
FUEL
ISSN
0016-2361
EISSN
Wydawca
ELSEVIER SCI LTD
DOI
URL
Rok publikacji
2019
Numer zeszytu
Strony od-do
334-338
Numer tomu
240
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
angielski
Biochar size fraction
pH
Organic compounds
Streszczenia
Język
angielski
Treść
The main goal of this study was to investigate the influence of pH and grain size of biochar on its physicochemical properties and on the quantity and quality of humic substances released from biochar. The studies were conducted on 5 biochar fractions and on the mixture of all fractions. Influence of grain size on physicochemical properties of biochar was characterized by analyzing changes in total carbon content, ash, density, total surface charge, average adsorption energy, specific surface area, content of functional groups and FTIR spectra. The effect of pH and grain size of biochar on releasing organic compounds were examined at pH of the extraction solution: 3, 5, 7 and 9 by analyzing aqueous extracts for changes in organic carbon content and for variation of humification degree coefficients. The results showed the grain size affected physicochemical properties of investigated material. The fraction <0.5 mm was characterized by the highest density, ash, content of functional groups and the lowest carbon content. Increasing grain diameter corresponded with decrease in average adsorption energy and with increase in the specific surface area. Only grain size, not pH of the solution, revealed clear effect on the quantity and quality of humic substances released from biochar.
Inne
System-identifier
PX-5c2c8537d5de8e624bcff6cd
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