Enhanced adsorption performance and governing mechanisms of ball-milled biochar for the removal of volatile organic compounds (VOCs)

Wei Xiang; Xueyang Zhang; Kuiqing Chen; June Fang; Feng He; Xin Hu; Daniel C.W. Tsang; Yong Sik Ok; Bin Gao

doi:10.1016/j.cej.2019.123842

Enhanced adsorption performance and governing mechanisms of ball-milled biochar for the removal of volatile organic compounds (VOCs)

Wei Xiang, Xueyang Zhang, Kuiqing Chen, June Fang, Feng He, Xin Hu, Daniel C.W. Tsang, Yong Sik Ok, Bin Gao

Research output: Contribution to journal › Article › peer-review

214 Citations (Scopus)

Abstract

Hickory wood was pyrolyzed at 300 °C, 450 °C, and 600 °C to produce biochars, which were then modified by ball milling. The pristine and ball-milled biochars were used to remove volatile organic compounds (VOCs) including acetone, ethanol, chloroform, cyclohexane, and toluene. Compared with the corresponding pristine one, each ball-milled biochar showed significantly improved structural characteristics. Their specific surface area (SSA) increased by 1.4–29.1 times, average pore size (APS) decreased slightly, and the hydrophilicity and polarity were also enhanced according to the elemental analysis. The adsorption of VOCs by ball-milled biochar increased by 1.3–13.0 folds, and the maximum adsorption capacity of acetone was up to 103.4 mg/g. The adsorption of polar VOCs (acetone, ethanol, and chloroform) onto ball-milled biochars was mainly controlled by surface adsorption process, which was affected by the SSA, APS, and volatile organic matter of the biochars, as well as the properties of the VOCs. The adsorbed VOCs were completely desorbed from the ball-milled biochars at relatively low temperature (≤115.2 °C). Reusability experiments with five adsorption-desorption cycles showed that ball-milled biochar had an excellent reusability for all VOCs. Ball-milled biochars can therefore be used as an effective and regenerable adsorbent for the removal of VOCs.

Original language	English
Article number	123842
Journal	Chemical Engineering Journal
Volume	385
DOIs	https://doi.org/10.1016/j.cej.2019.123842
Publication status	Published - 2020 Apr 1

Bibliographical note

Funding Information:
W.X and X.Z. would like to acknowledge the support of the Natural Science Foundation of Jiangsu Higher Education Institutions of China ( 18KJA610003 ), the Science and Technology Plan Projects of Xuzhou ( KC18150 , KC16SS091 ), Xuzhou University of Technology ( XKY2018136 , XKY2017121 ), and the Project of Ministry of Housing and Urban-Rural Development ( 2013-K4-27 ). Appendix A

Funding Information:
W.X and X.Z. would like to acknowledge the support of the Natural Science Foundation of Jiangsu Higher Education Institutions of China (18KJA610003), the Science and Technology Plan Projects of Xuzhou (KC18150, KC16SS091), Xuzhou University of Technology (XKY2018136, XKY2017121), and the Project of Ministry of Housing and Urban-Rural Development (2013-K4-27).

Publisher Copyright:
© 2019 Elsevier B.V.

Keywords

Adsorption of VOCs
Ball milling
Designer biochar
Reusability

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.cej.2019.123842

Cite this

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title = "Enhanced adsorption performance and governing mechanisms of ball-milled biochar for the removal of volatile organic compounds (VOCs)",

abstract = "Hickory wood was pyrolyzed at 300 °C, 450 °C, and 600 °C to produce biochars, which were then modified by ball milling. The pristine and ball-milled biochars were used to remove volatile organic compounds (VOCs) including acetone, ethanol, chloroform, cyclohexane, and toluene. Compared with the corresponding pristine one, each ball-milled biochar showed significantly improved structural characteristics. Their specific surface area (SSA) increased by 1.4–29.1 times, average pore size (APS) decreased slightly, and the hydrophilicity and polarity were also enhanced according to the elemental analysis. The adsorption of VOCs by ball-milled biochar increased by 1.3–13.0 folds, and the maximum adsorption capacity of acetone was up to 103.4 mg/g. The adsorption of polar VOCs (acetone, ethanol, and chloroform) onto ball-milled biochars was mainly controlled by surface adsorption process, which was affected by the SSA, APS, and volatile organic matter of the biochars, as well as the properties of the VOCs. The adsorbed VOCs were completely desorbed from the ball-milled biochars at relatively low temperature (≤115.2 °C). Reusability experiments with five adsorption-desorption cycles showed that ball-milled biochar had an excellent reusability for all VOCs. Ball-milled biochars can therefore be used as an effective and regenerable adsorbent for the removal of VOCs.",

keywords = "Adsorption of VOCs, Ball milling, Designer biochar, Reusability",

author = "Wei Xiang and Xueyang Zhang and Kuiqing Chen and June Fang and Feng He and Xin Hu and Tsang, {Daniel C.W.} and Ok, {Yong Sik} and Bin Gao",

note = "Funding Information: W.X and X.Z. would like to acknowledge the support of the Natural Science Foundation of Jiangsu Higher Education Institutions of China ( 18KJA610003 ), the Science and Technology Plan Projects of Xuzhou ( KC18150 , KC16SS091 ), Xuzhou University of Technology ( XKY2018136 , XKY2017121 ), and the Project of Ministry of Housing and Urban-Rural Development ( 2013-K4-27 ). Appendix A Funding Information: W.X and X.Z. would like to acknowledge the support of the Natural Science Foundation of Jiangsu Higher Education Institutions of China (18KJA610003), the Science and Technology Plan Projects of Xuzhou (KC18150, KC16SS091), Xuzhou University of Technology (XKY2018136, XKY2017121), and the Project of Ministry of Housing and Urban-Rural Development (2013-K4-27). Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

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T1 - Enhanced adsorption performance and governing mechanisms of ball-milled biochar for the removal of volatile organic compounds (VOCs)

AU - Xiang, Wei

AU - Zhang, Xueyang

AU - Chen, Kuiqing

AU - Fang, June

AU - He, Feng

AU - Hu, Xin

AU - Tsang, Daniel C.W.

AU - Ok, Yong Sik

AU - Gao, Bin

N1 - Funding Information: W.X and X.Z. would like to acknowledge the support of the Natural Science Foundation of Jiangsu Higher Education Institutions of China ( 18KJA610003 ), the Science and Technology Plan Projects of Xuzhou ( KC18150 , KC16SS091 ), Xuzhou University of Technology ( XKY2018136 , XKY2017121 ), and the Project of Ministry of Housing and Urban-Rural Development ( 2013-K4-27 ). Appendix A Funding Information: W.X and X.Z. would like to acknowledge the support of the Natural Science Foundation of Jiangsu Higher Education Institutions of China (18KJA610003), the Science and Technology Plan Projects of Xuzhou (KC18150, KC16SS091), Xuzhou University of Technology (XKY2018136, XKY2017121), and the Project of Ministry of Housing and Urban-Rural Development (2013-K4-27). Publisher Copyright: © 2019 Elsevier B.V.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - Hickory wood was pyrolyzed at 300 °C, 450 °C, and 600 °C to produce biochars, which were then modified by ball milling. The pristine and ball-milled biochars were used to remove volatile organic compounds (VOCs) including acetone, ethanol, chloroform, cyclohexane, and toluene. Compared with the corresponding pristine one, each ball-milled biochar showed significantly improved structural characteristics. Their specific surface area (SSA) increased by 1.4–29.1 times, average pore size (APS) decreased slightly, and the hydrophilicity and polarity were also enhanced according to the elemental analysis. The adsorption of VOCs by ball-milled biochar increased by 1.3–13.0 folds, and the maximum adsorption capacity of acetone was up to 103.4 mg/g. The adsorption of polar VOCs (acetone, ethanol, and chloroform) onto ball-milled biochars was mainly controlled by surface adsorption process, which was affected by the SSA, APS, and volatile organic matter of the biochars, as well as the properties of the VOCs. The adsorbed VOCs were completely desorbed from the ball-milled biochars at relatively low temperature (≤115.2 °C). Reusability experiments with five adsorption-desorption cycles showed that ball-milled biochar had an excellent reusability for all VOCs. Ball-milled biochars can therefore be used as an effective and regenerable adsorbent for the removal of VOCs.

AB - Hickory wood was pyrolyzed at 300 °C, 450 °C, and 600 °C to produce biochars, which were then modified by ball milling. The pristine and ball-milled biochars were used to remove volatile organic compounds (VOCs) including acetone, ethanol, chloroform, cyclohexane, and toluene. Compared with the corresponding pristine one, each ball-milled biochar showed significantly improved structural characteristics. Their specific surface area (SSA) increased by 1.4–29.1 times, average pore size (APS) decreased slightly, and the hydrophilicity and polarity were also enhanced according to the elemental analysis. The adsorption of VOCs by ball-milled biochar increased by 1.3–13.0 folds, and the maximum adsorption capacity of acetone was up to 103.4 mg/g. The adsorption of polar VOCs (acetone, ethanol, and chloroform) onto ball-milled biochars was mainly controlled by surface adsorption process, which was affected by the SSA, APS, and volatile organic matter of the biochars, as well as the properties of the VOCs. The adsorbed VOCs were completely desorbed from the ball-milled biochars at relatively low temperature (≤115.2 °C). Reusability experiments with five adsorption-desorption cycles showed that ball-milled biochar had an excellent reusability for all VOCs. Ball-milled biochars can therefore be used as an effective and regenerable adsorbent for the removal of VOCs.

KW - Adsorption of VOCs

KW - Ball milling

KW - Designer biochar

KW - Reusability

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Enhanced adsorption performance and governing mechanisms of ball-milled biochar for the removal of volatile organic compounds (VOCs)

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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