Journal
BIORESOURCE TECHNOLOGY
Volume 143, Issue -, Pages 615-622Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.06.033
Keywords
Black carbon; Charcoal; Waste management; Slow pyrolysis; Carbon sequestration
Funding
- Ministry of Environment, Republic of Korea as The GAIA Project [173-092-010]
- Basic Science Research Foundation through the National Research Foundation (NRF) of Korea
- Ministry of Education, Science and Technology [2012R1A1B3001409]
- Korea Environmental Industry & Technology Institute (KEITI) [ARQ20091700310005] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, pine needles were converted to biochar (BC) at different pyrolysis temperatures of 300, 500, and 700 degrees C to sorb trichloroethylene (TCE), and the changes in BC properties with each temperature were evaluated. Pyrolysis temperature showed a pronounced effect on BC properties. Decreases in molar H/C and O/C ratios resulted from removing O- and H-containing functional groups with increasing temperature, and produced high aromaticity and low polarity BCs. BCs produced at higher temperature showed greater TCE removal efficiency from water due to their high surface area, micro-porosity, and carbonized extent. The performance of various BCs for TCE removal was assessed by the Freundlich, Langmuir, Temkin, and Dubinin-Radushkevich adsorption models, among which the Temkin and Dubinin-Radushkevich models best described TCE adsorption onto various BCs, indicating prevailing sorption mechanism as pore-filling. (c) 2013 Elsevier Ltd. All rights reserved.
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