Recyclable magnetic chitosan microspheres with good ability of removing cationic dyes from aqueous solutions

Ya-Ming Ge; Xue-Fang Zhao; Jia-Hui Xu; Jun-Zhi Liu; Jia-Shun Yang; Shi-Jie Li

doi:10.1016/j.ijbiomac.2020.11.057

Recyclable magnetic chitosan microspheres with good ability of removing cationic dyes from aqueous solutions

Int J Biol Macromol. 2021 Jan 15:167:1020-1029. doi: 10.1016/j.ijbiomac.2020.11.057. Epub 2020 Nov 10.

Authors

Ya-Ming Ge¹, Xue-Fang Zhao², Jia-Hui Xu², Jun-Zhi Liu³, Jia-Shun Yang², Shi-Jie Li⁴

Affiliations

¹ National Engineering Research Center For Marine Aquaculture, Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Zhejiang Ocean University, Zhoushan 316022, China.
² College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, China.
³ National Engineering Research Center For Marine Aquaculture, Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Zhejiang Ocean University, Zhoushan 316022, China; College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, China. Electronic address: liujz@zjou.edu.cn.
⁴ National Engineering Research Center For Marine Aquaculture, Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Zhejiang Ocean University, Zhoushan 316022, China. Electronic address: lishijie@zjou.edu.cn.

PMID: 33186645
DOI: 10.1016/j.ijbiomac.2020.11.057

Abstract

Sr_3.8Fe_25.7O_70.4-chitosan magnetic microparticles (Sr_3.8Fe_25.7O_70.4-CMNs) with a core-shell structure were synthesized, characterized and applied for the removal of two model cationic dyes. The results showed that these magnetic microparticles possess fast adsorption rate and high adsorption efficiency for both crystal violet (CV) and basic red 9 (BR9) at a temperature ranging 30 °C to 40 °C and suitable pH range (pH ≥ 7). The maximum removal efficiency for CV and BR9 attained to 94.5% and 97.5% in 30 min, which was significantly faster and higher than that of chitosan (<50% in 60 min) (P<0.01). And its maximum adsorption capacity for CV and BR9 reached 29.46 mg/g and 32.16 mg/g, respectively. The adsorption process of Sr_3.8Fe_25.7O_70.4-CMNs follows the Langmuir isotherm with a high correlation coefficient (R² > 0.97) and the pseudo-second-order model. Additionally, the synthesized Sr_3.8Fe_25.7O_70.4-CMNs were easy to regeneration and reuse, and the removal rate remained above 90% after 5 recycle times. This study would provide a new more environmental friendly material and method for the treatment of wastewater containing toxic dyes.

Keywords: Cationic dyes; Chitosan; Magnetic microsphere.

MeSH terms

Algorithms
Cations / chemistry*
Chitosan / chemistry*
Coloring Agents / chemistry*
Gentian Violet / chemistry
Hydrogen-Ion Concentration
Kinetics
Magnetic Phenomena*
Microspheres*
Models, Theoretical
Molecular Structure
Spectrum Analysis
Wastewater
Water Pollutants, Chemical / chemistry
Water Purification / methods

Substances

Cations
Coloring Agents
Waste Water
Water Pollutants, Chemical
Chitosan
Gentian Violet