Study on the cyclic adsorption performance of biomass composite membrane for Hg(II)

Salix psammophila wood flour /polyvinyl alcohol hydrogel composite membrane (SPPM) with high adsorption capacity and good cycle adsorption performance was prepared by wet spinning technology. The SPPM was characterised by the scanning electron microscope (SEM), specific surface area test (BET), ener...

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Bibliographic Details
Published in:Environmental technology 2023-11, Vol.44 (25), p.3777-3790
Main Authors: Zhao, Bai-yun, Yang, Xing-lin, Liu, Xiao-Kai, Shi, Qi, Liu, Yan-Rong, Wang, Li
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
composite membrane
Fourier analysis
Fourier transforms
Gravimetric analysis
Hg(II)
Hydrogels
Infrared analysis
Infrared spectroscopy
Membranes
Mercury
Mercury (metal)
Photoelectron spectroscopy
Photoelectrons
Polyvinyl alcohol
Salix psammophila wood powder (SPP)
Scanning electron microscopy
Spectrum analysis
Structural stability
Surface chemistry
Thermal analysis
Thermal stability
Thermogravimetric analysis
Wet spinning
X ray photoelectron spectroscopy
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Summary:Salix psammophila wood flour /polyvinyl alcohol hydrogel composite membrane (SPPM) with high adsorption capacity and good cycle adsorption performance was prepared by wet spinning technology. The SPPM was characterised by the scanning electron microscope (SEM), specific surface area test (BET), energy dispersive spectrum (EDS) thermal gravimetric analysis (TGA), fourier transform infrared spectroscopy (FT-IR), and x-ray photoelectron spectroscopy (XPS). The results showed that the surface of SPPM is rough and porous, with good pore structure and thermal stability, and mercury ions (Hg(II)) have been successfully adsorbed on SPPM. At the same time, the effects of adsorption conditions (Hg(II) initial concentration, pH, adsorption time, and temperature) on the adsorption performance of SPPM were studied. Results from the adsorption experiment showed that the adsorption capacity of SPPM for Hg(II) can reach 426 mg/g. After four adsorption and desorption experiments, the adsorption capacity can reach 375 mg/g, which indicates that SPPM has good cycle adsorption performance. The adsorption kinetics was better described by the Pseudo-second-order kinetic, and their adsorption isotherms were fitted for the Langmuir model. The obtained results showed that SPPM is an available, economical adsorbent and was found suitable for removing Hg(II) from an aqueous solution.
ISSN:0959-3330
1479-487X
DOI:10.1080/09593330.2022.2071644