Design of Organophosphonic Acid-modified Carbon Nanotubes/Bismuth Sulfide Composites and Its Adsorption Properties for Au(Ⅲ)
A new efficient heavy metal adsorption material,organic phosphonic acid carboxylic acid modified multi walled carbon nanotubes/bismuth sulfide(PBTCA-MWCNTs/Bi2S3),is designed and synthesized.It was characterized by Fourier transform infrared(FT-IR),scanning electron microscope(SEM),energy dispersive X-ray spectroscopy(EDX),and X-ray photoelectron spectroscopy(XPS),and its adsorption performance for heavy metal ions was studied.The research results show that PBTCA-MWCNTs/Bi2S3 has excellent adsorption properties for Au(Ⅲ),and the related fitting results of the Langmuir model show that its adsorption capacity can reach up to 1 655.50 mg·g-1 at 25 ℃.The studies on the adsorption thermodynamics,adsorption kinetics and adsorption selectivity could provide effective technical support for the recovery of Au(Ⅲ).
water treatmentadsorption for Au(Ⅲ)carbon nanotubesorganphosphonic acidbismuth sulfide
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