Adsorption mechanisms of alginate oligosaccharides with specific degree of polymerizations on a novel ion-exchange resin: Experiments and simulations

Zhang, Xingxing; Liu, Lujie; Zhang, Chunyue; Zhu, Yuechao; Zhao, Hefei; Zhao, Liming

doi:10.1016/j.cej.2023.141717

Cited by 7 publications

(1 citation statement)

References 53 publications

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“…For cleaning water, both synthetic and natural polymers are attractive. They can be employed as membrane coatings, flocculants, or for the low-cost production of various sorbents for pollutants like fibers, hydrogels, resins, or core–shell particles. – The synthetic ionic exchange resins are synthetic polymers that takes advantage of the properties of forming chelates with HMIs and exchanges them with nonharmful hydrogen ions. ,,– They are reusable and highly stable in alkaline or acidic solutions. Column laboratory studies, which are considered preliminary to implementing a larger scale solution, are recommended for improving HMI sorption efficiency under real application conditions.…”

Section: Introductionmentioning

confidence: 99%

Versatile Zwitterionic Beads for Heavy Metal Ion Removal from Aqueous Media and Soils by Sorption and Catalysis Processes

Zaharia,

Bucatariu,

Vasiliu

et al. 2023

ACS Appl. Polym. Mater.

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Cross-linked polymeric beads of divinylbenzene/ethyl acrylate/acrylonitrile copolymer, with zwitterionic functional groups obtained by aminolysis with ethylenediamine and carboxymethylation with sodium chloroacetate (IEx-Zw) were herein used in the heavy metal ions (HMIs) dynamic sorption studies, both as a single componentsimulated solution (Cu 2+ ) and in multicomponent polluted water (Cu 2+ , Fe 2+ , Mn 2+ , and Zn 2+ ) collected from tailings pond of Tarnita, Suceava, Romania. The experiments were performed in fluidized bed columns filled with IEx-Zw, for the column sorption of Cu 2+ from synthetic polluted waters being used to assess the best working conditions of the sorbent. The HMIs sorption experiments were supported by UV−Vis spectroscopy, atomic absorption spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and thermogravimetric analysis. The dual sorbent/catalyst function of the IEx-Zw was followed in the copper sorption experiments, with sorbed Cu 2+ being reduced to Cu 2 O, as found by X-ray diffraction analysis of the obtained precipitate. The multicomponent HMIs sorption kinetic data were described by Thomas and Yoon−Nelson models to gain a deeper understanding of the use of the zwitterionic beads in a continuous flow setup. Furthermore, the germination assays were used to investigate the toxicity of soil collected from the Tarnita sterile dump. Soil cleaning using the IEx-Zw resin was shown to be effective enough to increase the soils' capacity to support the germination process.

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