Magnetic Wakame-Based Biochar/Ni Composites with Enhanced Adsorption Performance for Diesel

• Published in: Journal of renewable materials Vol. 10; no. 12; pp. 3147 - 3165
• Main Authors: Jing, Hua, Lu, Shiyao, Ji, Lili, Li, Shijie, Zhu, Baikang, Guo, Jian, Sun, Jiaxing, Cai, Lu, Wang, Yaning
• Format: Journal Article
• Language: English
• Published: Henderson Tech Science Press 2022
• Subjects: Adsorption; Algae; Biomass; Carbon; Charcoal; Composite materials; Diesel; Experiments; Fourier transforms; Hydrocarbons; Magnetic fields; Methods; Petroleum; Pollutants; Pyrolysis; Reagents; Recyclability; Sorbents; Spectrum analysis; Wastewater treatment; Zinc chloride
• ISSN: 2164-6341; 2164-6325; 2164-6341
• DOI: 10.32604/jrm.2022.020215

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.