An abundant porous biochar material derived from wakame (Undaria pinnatifida) with high adsorption performance for three organic dyes

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

doi:10.1016/j.biortech.2020.124082

An abundant porous biochar material derived from wakame (Undaria pinnatifida) with high adsorption performance for three organic dyes

Bioresour Technol. 2020 Dec:318:124082. doi: 10.1016/j.biortech.2020.124082. Epub 2020 Sep 6.

Authors

Xinxin Yao¹, Lili Ji², Jian Guo³, Shaoliang Ge⁴, Wencheng Lu¹, Yingna Chen³, Lu Cai⁵, Yaning Wang⁶, Wendong Song⁷

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. Electronic address: jll-gb@163.com.
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 Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China.
⁷ College of Petrochemical and Energy Engineering College, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China.

PMID: 32932115
DOI: 10.1016/j.biortech.2020.124082

Abstract

In this study, an activated wakame biochar material (AWBM) was prepared by a one-step calcination and activation method, whose adsorption performances for methylene blue (MB), Rhodamine B (RB) and malachite green (MG) were also analyzed. The results showed AWBM was a mesoporous fluffy structure material with a higher specific surface (1156.25 m²/g), exhibiting superior adsorption capacities for MB (841.64 mg/g), RB (533.77 mg/g) and MG (4066.96 mg/g), respectively. In addition, FT-IR analysis showed that AWBM possessed abundant active groups (such as -OH, -CO and -CH), further enhancing the adsorption efficiencies. The Langmuir model could better fit the three dyes adsorption isotherms process using AWBM, and the Pseudo-second-order model could better describe the adsorption kinetic experimental data. The thermodynamic analysis showed that the three dyes adsorption using AWBM was spontaneous endothermic reaction. This study suggests AWBM has enormous potential in the application of removing organic dyes from wastewater.

Keywords: Abundant porous structure; Adsorption mechanism; Organic dyes; Wakame biochar.

MeSH terms

Adsorption
Charcoal
Coloring Agents
Kinetics
Methylene Blue
Porosity
Spectroscopy, Fourier Transform Infrared
Undaria*
Water Pollutants, Chemical*

Substances

Coloring Agents
Water Pollutants, Chemical
biochar
Charcoal
Methylene Blue