Preparation and graft modification of hierarchically porous ferriferrous oxide for heavy metal ions adsorption

Wang, Fan; Sun, Yuanqiang; Guo, Xingzhong; Li, Dongyun; Ye, Hui

doi:10.1007/s10971-020-05350-8

Cited by 9 publications

(1 citation statement)

References 43 publications

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“…Adsorption is the widely employed method used for purification water because of its low costs, convenience, and wide adaptability [6][7][8]. Among sorbents traditionally applied there are: natural materials [9][10][11][12], individual and mixed metal oxides [13][14][15][16], sorbents on the carbon base [17] and inorganic compounds such as titanates [18], phosphates [19], silicates [20], etc.…”

Section: Introductionmentioning

confidence: 99%

Inorganic sorbents on the base of magnesium silicates obtained by two synthetic routes

Kravchenko¹,

Khodakovska²,

Kovtun³

et al. 2022

Preprint

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In the present study three novel inorganic ion exchange materials on the base of magnesium silicates were synthesized by precipitation and hydrothermal sol gel methods with two reagents ratio. Physico-chemical properties of samples were characterized by thermogravemetric and differential thermal analyses, low temperature adsorption/desorption method and transmission electron microscopic studies. It was found that all sorbents were obtained in a form of amorphous layer-structure magnesium silicates with micro- and mesoporous structure. The ion exchange properties of these materials for Cs+, Sr2+ Cu2+, Co2+and Cd2+ removing from water solution investigated. Data obtained showed that magnesium silicates had the higher capacity toward the heavy metal cations compared to the radionuclides regardless the method used for synthesis. The sample synthesized with excess of metasilicate exhibited the higher efficiency of heavy metal cations sorption than the sample obtained using equimolar ratio of components. Amongst Langmuir and Freundlich models, Langmuir model fitted well for experimental data received on these adsorbents.

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