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Materials 2019, 12(2), 236; https://doi.org/10.3390/ma12020236

Effective Adsorption of Diesel Oil by Crab-Shell-Derived Biochar Nanomaterials

1
College of Environmental and Science Technology, Donghua University, Shanghai 201620, China
2
College of Food and Medical, Zhejiang Ocean University, Zhoushan 316022, China
3
College of Port and Transportation Engineering, Zhejiang Ocean University, Zhoushan 316022, China
4
Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan 316022, China
5
College of Petrochemical and Energy Engineering, Zhejiang Ocean University, Zhoushan 316022, China
*
Authors to whom correspondence should be addressed.
Received: 8 December 2018 / Revised: 5 January 2019 / Accepted: 8 January 2019 / Published: 11 January 2019
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Abstract

This study, for the first time, rendered crab shell activated biochar modified by potassium hydroxide (KOH) impregnation (CSAB), revealing a new potential application in the removal of diesel oil from oily wastewater. The structural characteristics of crab shell biochar (CSB) and CSAB were investigated by SEM, and the crystal structure and optical properties of as-prepared samples were analyzed using XRD and FTIR. Results showed that CSAB had stratified surface structure morphology, abundant functional groups, and that its high specific surface area could reach up to 2441 m2/g, which was about eight times larger than that of untreated CSB (307 m2/g). An adsorption isotherm study indicated that the actual adsorption process both of CSAB and CSB were found to fit better with the Freundlich equation. Moreover, chemical interaction controlled the adsorption kinetics efficiency while the adsorption equilibrium capacity was 93.9 mg/g. Due to its highly developed pore structure, unique surface characteristics, and effective adsorption performance, this low-cost activated carbon had the potential to serve as an efficient adsorbent for water pollution purification. View Full-Text
Keywords: crab shell; activated biochar; adsorption performance; oily wastewater crab shell; activated biochar; adsorption performance; oily wastewater
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Cai, L.; Zhang, Y.; Zhou, Y.; Zhang, X.; Ji, L.; Song, W.; Zhang, H.; Liu, J. Effective Adsorption of Diesel Oil by Crab-Shell-Derived Biochar Nanomaterials. Materials 2019, 12, 236.

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