NDLI: Xanthate-Modified Magnetic $Fe_{3}O_{4}@SiO_{2}$-Based Polyvinyl Alcohol/Chitosan Composite Material for Efficient Removal of Heavy Metal Ions from Water

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Xanthate-Modified Magnetic $Fe_{3}O_{4}@SiO_{2}$-Based Polyvinyl Alcohol/Chitosan Composite Material for Efficient Removal of Heavy Metal Ions from Water

Content Provider	MDPI
Author	Wang, Shifan Liu, Yuan Yang, Aiwen Zhu, Qi Sun, Hua Sun, Po Yao, Bing Zang, Yunxiao Du, Xihua Dong, Liming
Copyright Year	2022
Description	Chitosan has several shortcomings that limit its practical application for the adsorption of heavy metals: mechanical instability, a challenging separation and recovery process, and low equilibrium capacity. This study describes the synthesis of a magnetic xanthate-modified polyvinyl alcohol and chitosan composite (XMPC) for the efficient removal and recovery of heavy metal ions from aqueous solutions. The XMPC was synthesized from polyvinyl alcohol, chitosan, and magnetic $Fe_{3}O_{4}@SiO_{2}$ nanoparticles. The XMPC was characterized, and its adsorption performance in removing heavy metal ions was studied under different experimental conditions. The adsorption kinetics fit a pseudo-second-order kinetic model well. This showed that the adsorption of heavy metal ions by the XMPC is a chemical adsorption and is affected by intra-particle diffusion. The equilibrium adsorption isotherm was well described by the Langmuir and Freundlich equations. The XMPC reached adsorption equilibrium at 303 K after approximately 120 min, and the removal rate of Cd(II) ions was 307 mg/g. The composite material can be reused many times and is easily magnetically separated from the solution. This makes the XMPC a promising candidate for widespread application in sewage treatment systems for the removal of heavy metals.
Starting Page	1107
e-ISSN	20734360
DOI	10.3390/polym14061107
Journal	Polymers
Issue Number	6
Volume Number	14
Language	English
Publisher	MDPI
Publisher Date	2022-03-10
Access Restriction	Open
Subject Keyword	Polymers Environmental Engineering Environmental Sciences Magnetic Materials Chitosan Adsorption Heavy Metal Modification
Content Type	Text
Resource Type	Article

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