Influence of pyrolysis temperature on polycyclic aromatic hydrocarbons production and tetracycline adsorption behavior of biochar derived from spent coffee ground

Van-Truc Nguyen; Thanh-Binh Nguyen; Chiu-Wen Chen; Chang-Mao Hung; Thi-Dieu-Hien Vo; Jih-Hsing Chang; Cheng-Di Dong

doi:10.1016/j.biortech.2019.03.096

Influence of pyrolysis temperature on polycyclic aromatic hydrocarbons production and tetracycline adsorption behavior of biochar derived from spent coffee ground

Bioresour Technol. 2019 Jul:284:197-203. doi: 10.1016/j.biortech.2019.03.096. Epub 2019 Mar 20.

Authors

Van-Truc Nguyen¹, Thanh-Binh Nguyen², Chiu-Wen Chen³, Chang-Mao Hung⁴, Thi-Dieu-Hien Vo⁵, Jih-Hsing Chang⁶, Cheng-Di Dong⁷

Affiliations

¹ Institute of Marine Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan.
² Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan. Electronic address: [email protected].
³ Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan. Electronic address: [email protected].
⁴ Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan.
⁵ Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam.
⁶ Department of Environmental Engineering and Management, Chaoyang University of Technology, Taichung 41349, Taiwan. Electronic address: [email protected].
⁷ Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan. Electronic address: [email protected].

PMID: 30939381
DOI: 10.1016/j.biortech.2019.03.096

Abstract

The main objective of this study was to evaluate the effect of different pyrolysis temperatures on the formation of polycyclicaromatichydrocarbons (PAHs) in biochar originated spent coffee ground (SCG) and the tetracycline (TC) adsorption behavior of biochar in water. The results showed that biochar synthesized at 500 °C (SCG 500) contained low PAHs (600 µg kg^-1) and the highest TC adsorption efficiency. In addition, the characteristics, influencing factors on TC adsorption, and the related mechanisms of SCG 500 were comprehensively investigated. The results showed that the highest efficiency was observed at pH of 7 and the presence of ions in salinity solution reduced the adsorption capacity of SCG 500. The electrostatic interaction, hydrogen bonding, and π-EDA were the major adsorption mechanisms. Safety PAHs level, low-cost, widely material sources and high TC removal capacity suggested that SCG 500 was a promising environmentally friendly effective absorbent.

Keywords: Adsorption mechanism; Biochar; PAHs; Pyrolysis temperature; Tetracycline.

MeSH terms

Adsorption
Charcoal / chemistry*
Coffee / chemistry*
Polycyclic Aromatic Hydrocarbons / chemistry*
Pyrolysis
Temperature
Tetracycline / chemistry*
Water / chemistry*

Substances

Coffee
Polycyclic Aromatic Hydrocarbons
biochar
Water
Charcoal
Tetracycline