Magnetic activated biochar nanocomposites derived from wakame and its application in methylene blue adsorption

Xinxin Yao; Lili Ji; Jian Guo; Shaoliang Ge; Wencheng Lu; Lu Cai; Yaning Wang; Wendong Song; Hailong Zhang

doi:10.1016/j.biortech.2020.122842

Magnetic activated biochar nanocomposites derived from wakame and its application in methylene blue adsorption

Bioresour Technol. 2020 Apr:302:122842. doi: 10.1016/j.biortech.2020.122842. Epub 2020 Jan 21.

Authors

Xinxin Yao¹, Lili Ji², Jian Guo³, Shaoliang Ge⁴, Wencheng Lu¹, Lu Cai⁵, Yaning Wang², Wendong Song⁶, Hailong Zhang⁷

Affiliations

¹ College of Naval Architecture and Mechanical-Electrical Engineering, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China.
² Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China.
³ College of Food and Medical, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China.
⁴ College of Port and Transportation Engineering, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China.
⁵ Donghai Science and Technology College, Zhejiang Ocean University, Zhoushan 316000, China.
⁶ College of Petrochemical and Energy Engineering College, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China.
⁷ Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China. Electronic address: h_l_zhang@yahoo.com.

PMID: 32006925
DOI: 10.1016/j.biortech.2020.122842

Abstract

In this work, magnetic wakame biochar nanocomposites for the first time had been synthesized to investigate their adsorption to methylene blue dye. As-prepared magnetic biochar samples were obtained by the impregnation method to load nickel on wakame biochar via one-step carbonization with activation agent KOH at 800 °C. The prepared samples were characterized by BET, XRD, FTIR, Raman, SEM, TEM and so on. The results exhibited that the maximum adsorption capacity of BW(Ni)0.5 to methylene blue could reach 479.49 mg/g at 20 °C. The adsorption behavior was more suitable for Langmuir isotherm equation and the kinetic data were most consistent with the pseudo second-order model. And also, the adsorption reaction was a spontaneous and endothermic process. After five cycles, it was found that BW(Ni)0.5 had a high adsorption capacity for methylene blue (117.58 mg/g). This study demonstrated that wakame biochar could have great potential in dye wastewater treatment.

Keywords: Activated biochar nanocomposites; Magnetic; Methylene blue; Thermodynamics; Wakame.

MeSH terms

Adsorption
Charcoal
Hydrogen-Ion Concentration
Kinetics
Magnetic Phenomena
Methylene Blue
Nanocomposites*
Thermodynamics
Undaria*
Water Pollutants, Chemical*

Substances

Water Pollutants, Chemical
biochar
Charcoal
Methylene Blue