Trichloroethylene adsorption by pine needle biochars produced at various pyrolysis temperatures

Mahtab Ahmad; Sang Soo Lee; Anushka Upamali Rajapaksha; Meththika Vithanage; Ming Zhang; Ju Sik Cho; Sung Eun Lee; Yong Sik Ok

doi:10.1016/j.biortech.2013.06.033

Trichloroethylene adsorption by pine needle biochars produced at various pyrolysis temperatures

Mahtab Ahmad, Sang Soo Lee, Anushka Upamali Rajapaksha, Meththika Vithanage, Ming Zhang, Ju Sik Cho, Sung Eun Lee, Yong Sik Ok

Research output: Contribution to journal › Article

193 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	615-622
Number of pages	8
Journal	Bioresource Technology
Volume	143
DOIs	https://doi.org/10.1016/j.biortech.2013.06.033
Publication status	Published - 2013 Jan 1
Externally published	Yes

Keywords

Black carbon
Carbon sequestration
Charcoal
Slow pyrolysis
Waste management

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

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Ahmad, M., Lee, S. S., Rajapaksha, A. U., Vithanage, M., Zhang, M., Cho, J. S., Lee, S. E., & Ok, Y. S. (2013). Trichloroethylene adsorption by pine needle biochars produced at various pyrolysis temperatures. Bioresource Technology, 143, 615-622. https://doi.org/10.1016/j.biortech.2013.06.033

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title = "Trichloroethylene adsorption by pine needle biochars produced at various pyrolysis temperatures",

abstract = "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.",

keywords = "Black carbon, Carbon sequestration, Charcoal, Slow pyrolysis, Waste management",

author = "Mahtab Ahmad and Lee, {Sang Soo} and Rajapaksha, {Anushka Upamali} and Meththika Vithanage and Ming Zhang and Cho, {Ju Sik} and Lee, {Sung Eun} and Ok, {Yong Sik}",

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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

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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

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