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Characterization and Use of Char Produced from Pyrolysis of Post-Consumer Mixed Plastic Waste
Article

Development of Biochars Derived from Water Bamboo (Zizania latifolia) Shoot Husks Using Pyrolysis and Ultrasound-Assisted Pyrolysis for the Treatment of Reactive Black 5 (RB5) in Wastewater

1
Department of Environmental Engineering, Faculty of Environment, University of Science (VNUHCM), Ho Chi Minh City 700000, Vietnam
2
Vietnam National University Ho Chi Minh City, Ho Chi Minh City 700000, Vietnam
3
Department of Civil Engineering, College of Science and Technology, National Chi Nan University, Puli, Nantou 545301, Taiwan
4
Department of Safety Health and Environment, National Yunlin University of Science and Technology, Yunlin 640301, Taiwan
*
Authors to whom correspondence should be addressed.
Academic Editor: María Ángeles Martín-Lara
Water 2021, 13(12), 1615; https://doi.org/10.3390/w13121615
Received: 21 April 2021 / Revised: 28 May 2021 / Accepted: 3 June 2021 / Published: 8 June 2021
Adsorbent made by carbonization of biomass under oxygen-limited conditions has become a promising material for wastewater treatment owing to its cost-effective, simple, and eco-friendly processing method. Ultrasound is considered a green technique to modify carbon materials because it uses water as the solvent. In this study, a comparison of Reactive Black 5 (RB5) adsorption capacity between biochar (BC) generated by pyrolysis of water bamboo (Zizania latifolia) husks at 600 °C and ultrasound-assisted biochar (UBC) produced by pyrolysis at 600 °C assisted by ultrasonic irradiation was performed. UBC showed a greater reaction rate and reached about 80% removal efficiency after 4 h, while it took 24 h for BC to reach that level. Scanning electron microscope (SEM) images indicated that the UBC morphology surface was more porous, with the structure of the combination of denser mesopores enhancing physiochemical properties of UBC. By Brunauer, Emmett, and Teller (BET), the specific surface areas of adsorbent materials were analyzed, and the surface areas of BC and UBC were 56.296 m2/g and 141.213 m2/g, respectively. Moreover, the pore volume of UBC was 0.039 cm3/g, which was higher than that of BC at 0.013 cm3/g. The adsorption isotherms and kinetics revealed the better fits of reactions to Langmuir isotherm and pseudo-second-order kinetic model, indicating the inclination towards monolayer adsorption and chemisorption of RB5 on water bamboo husk-based UBC. View Full-Text
Keywords: biochar; pyrolysis; ultrasonic cavitation; water bamboo; Reactive Black 5 biochar; pyrolysis; ultrasonic cavitation; water bamboo; Reactive Black 5
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MDPI and ACS Style

Nguyen, T.T.; Chen, H.-H.; To, T.H.; Chang, Y.-C.; Tsai, C.-K.; Chen, K.-F.; Tsai, Y.-P. Development of Biochars Derived from Water Bamboo (Zizania latifolia) Shoot Husks Using Pyrolysis and Ultrasound-Assisted Pyrolysis for the Treatment of Reactive Black 5 (RB5) in Wastewater. Water 2021, 13, 1615. https://doi.org/10.3390/w13121615

AMA Style

Nguyen TT, Chen H-H, To TH, Chang Y-C, Tsai C-K, Chen K-F, Tsai Y-P. Development of Biochars Derived from Water Bamboo (Zizania latifolia) Shoot Husks Using Pyrolysis and Ultrasound-Assisted Pyrolysis for the Treatment of Reactive Black 5 (RB5) in Wastewater. Water. 2021; 13(12):1615. https://doi.org/10.3390/w13121615

Chicago/Turabian Style

Nguyen, Thanh T., Hung-Hsiang Chen, Thi H. To, Yu-Chen Chang, Cheng-Kuo Tsai, Ku-Fan Chen, and Yung-Pin Tsai. 2021. "Development of Biochars Derived from Water Bamboo (Zizania latifolia) Shoot Husks Using Pyrolysis and Ultrasound-Assisted Pyrolysis for the Treatment of Reactive Black 5 (RB5) in Wastewater" Water 13, no. 12: 1615. https://doi.org/10.3390/w13121615

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