TY - JOUR
T1 - Trichloroethylene adsorption by pine needle biochars produced at various pyrolysis temperatures
AU - Ahmad, Mahtab
AU - Lee, Sang Soo
AU - Rajapaksha, Anushka Upamali
AU - Vithanage, Meththika
AU - Zhang, Ming
AU - Cho, Ju Sik
AU - Lee, Sung Eun
AU - Ok, Yong Sik
PY - 2013/9
Y1 - 2013/9
N2 - In this study, pine needles were converted to biochar (BC) at different pyrolysis temperatures of 300, 500, and 700°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.
AB - In this study, pine needles were converted to biochar (BC) at different pyrolysis temperatures of 300, 500, and 700°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.
KW - Black carbon
KW - Carbon sequestration
KW - Charcoal
KW - Slow pyrolysis
KW - Waste management
UR - http://www.scopus.com/inward/record.url?scp=84880308166&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2013.06.033
DO - 10.1016/j.biortech.2013.06.033
M3 - Article
AN - SCOPUS:84880308166
SN - 0960-8524
VL - 143
SP - 615
EP - 622
JO - Bioresource Technology
JF - Bioresource Technology
ER -
