Synthesis of guanidine-containing copolymers and their applications in the sorption of transition metals

Горбунова, М. Н.; Батуева, Т. Д.

doi:10.1002/pat.3869

Cited by 4 publications

(1 citation statement)

References 15 publications

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“…Some Re/Tc inorganic adsorbents have been reported, such as graphene oxide and modified Al 2 O 3 , but these adsorbents exhibit low adsorption capacity and poor selectivity. Some organic adsorbents have also been reported, such as anion-exchange resins and gels; however, their adsorption kinetics and selectivity are not good enough to meet the requirements. In recent years, metal organic frameworks (MOFs) and covalent organic frameworks (COFs) have been widely studied as novel adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Radiation Syntheses and Performance of Novel Hierarchically Macro-/Mesoporous Silica Adsorbents with Quaternary Phosphonium for the High Selective Removal of Perrhenate

Zhong

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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A novel quaternary phosphonium-grafted hierarchically macro-/ mesoporous silica, named as HPS-C-P, was synthesized by alkylating hierarchically porous silica with trimethylchlorosilane and a subsequent twostep radiation-induced grafting of quaternary phosphonium. Fourier transform infrared, X-ray photoelectron spectroscopy (XPS), Brunauer−Emmett−Teller, and scanning electron microscopy analyses testified that alkyl and quaternary phosphonium groups were grafted uniformly in HPS-C-P. The adsorption of HPS-C-P for ReO 4− was evaluated and it was found that the adsorption equilibrium could be achieved within 4 min, and the adsorption isotherm was fitted well by the modified Langmuir model. The maximum ReO 4 − uptake of this adsorbent could reach 140.5 mg•g −1 , which was higher than the quaternary phosphonium-grafted hierarchically porous silica synthesized by a chemical method. HPS-C-P has good radiation resistance and cyclic adsorption performance, and the adsorption selectivity of HPS-C-P toward ReO 4 − in the presence of competitive anions, including NO 3 − , SO 4 2− , Cl − , CO 3 2− , and PO 4 3− , is extremely high, which is higher than most of the adsorbents reported in recent literature studies. Infrared and XPS analysis revealed that ReO 4 − was adsorbed onto HPS-C-P through the ion-exchange mechanism. This work provided a new method to produce highly efficient silica-based adsorbents to selectively remove Re from an aqueous solution even exposed to a radiation environment.

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Section: Introductionmentioning

confidence: 99%