磁性壳聚糖的制备及处理亚甲基蓝废水

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Abstract

A magnetic chitosan was prepared by cross linking with glutaraldehyde and Fe₃O₄ for the removal of methylene blue from wastewater. The performance of the magnetic chitosan on methylene blue removal and the characteristics of the adsorption kinetics, isotherms and thermodynamics were investigated. When the magnetic chitosan dose was adjusted to 0.5g/L and the solution pH value was adjusted to 10, after 60 min, removal efficiency of the methylene blue reached 97.6%, and the corresponding adsorption capacity reached 39.0mg/g. Compare to that of 59.8% and 23.9mg/g by the natural chitosan, both removal efficiency and adsorption capacity were improved significantly. Furthermore, the adsorption process of the methylene blue could be well fitted to the pseudo-second-order kinetic model (R²=0.99902) and the Langmuir equilibrium model (R²=0.99961), the adsorption process was a thermodynamic spontaneous process, and the adsorption reaction was an exothermic reaction.

Key words： methylene blue chitosan adsorption kinetic adsorption isotherm adsorption thermodynamics

Received: 08 November 2018

PACS:

X703.1

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	Articles by authors
	GUO Jun-yuan
	GAN Peng-fei
	CHEN Cheng
	ZHANG Guo-jun

Cite this article:

GUO Jun-yuan,GAN Peng-fei,CHEN Cheng等. Preparation of magnetic chitosan and its application in the treatment of methylene blue wastewater[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(6): 2422-2430.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I6/2422

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