Magnetic Wakame-Based Biochar/Ni Composites with Enhanced Adsorption Performance for Diesel
  • Hua Jing1, Shiyao Lu1, Lili Ji1,*, Shijie Li1, Baikang Zhu2, Jian Guo3, Jiaxing Sun1, Lu Cai4, Yaning Wang1
1 National Marine Facilities Aquaculture Engineering Technology Research Center, Zhejiang Ocean University, Zhoushan, 316022, China
2 College of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhejiang Ocean University, Zhoushan, 316022, China
3 College of Food and Medical, Zhejiang Ocean University, Zhoushan, 316022, China
4 Institute of Ocean Higher Education, Zhejiang Ocean University, Zhoushan, 316022, China
* Corresponding Author: Lili Ji. Email: jll-gb@163.com
(This article belongs to this Special Issue:Biochar Based Materials for a Green Future)
Received 11 November 2021; Accepted 24 January 2022 ; Published online 17 February 2022
Abstract
In this study, the magnetic wakame biochar/Ni composites were prepared with three activating reagents of H3PO4, ZnCl2 and KOH by one-step pyrolysis activation, characterized by BET, SEM, TEM, FI-IR, XRD, Raman, and elemental analyzer, and their adsorption performance for diesel were also analyzed. The results showed that wakame biochar/Ni composites had larger specific surface area, abundant porous structure, and various reactive groups, rendering its enhancement of adsorption efficiency. The adsorption experiments indicated that the maximum adsorption capacities for diesel using WBPA 0.5, WBHZ 0.5 and WBPH 0.5 were 4.11, 8.83, and 13.47 g/g, respectively. The Langmuir model was more suitable for the adsorption isotherms process, and the Pseudo-second-order model could better describe the adsorption kinetic experimental. And the magnetic wakame biochar/Ni composites presented good stability and recyclability. This study provides a novel pattern for the high-value utilization of wakame, having huge potential in the treatment of oily wastewater.
Keywords
Wakeme; magnetic biochar/Ni composites; activating reagents; diesel adsorption