A New Triazole-Thiol Compound Organofunctionalized on the Silica Gel Surface: Chemical Properties and Copper Sorption in Ethanol / Water Media

Magossi, Maiara Souza; Maraldi, Vitor Alexandre; Magossi, Mariana S.; Costa, Fabíola Medeiros da; Franco, Fernanda dos Santos; Carmo, Devaney Ribeiro do

doi:10.1007/s12633-020-00738-1

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“…The comparison of the maximum adsorption capacity of studied metals onto various adsorbents described in the literature is presented in Table 5. It indicates that the samples examined in this work show lower values in comparison to many other adsorbents, including some gelatin-based ones [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47]. In case of chitosan-gelatin monoliths reinforced with graphite oxide nanosheets (GO), by Zhang et al [34], the adsorption capacity measured for Pb(II) and Cu(II) was 100 mg/g and 130 mg/g, respectively.…”

Section: 𝑞 = 𝐾 𝐶mentioning

confidence: 82%

Gelatin–Siloxane Hybrid Monoliths as Novel Heavy Metal Adsorbents

2022

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Novel gelatin-siloxane hybrid monoliths for heavy metal removal were prepared in the chemical reaction of gelatin with organomodified silicone containing epoxy group. Obtained porous hybrid materials were applied for adsorption of Cu(II), Cd(II) and Pb(II) from aqueous solutions. In this paper, the influence of siloxane amount used for the modification of gelatin on adsorbent stability and heavy metal removal was examined. The effect of pH values of the immersion liquid, as well as the contact time, was studied. Morphology, compressive strength and water absorption of hybrid monoliths were investigated. Desorption tests were also performed. The results showed that the higher the amount of the siloxane, the better stability of the hybrid monoliths in aqueous solutions. The highest values of adsorption capacity were observed for Pb(II) ions. The experimental maximum adsorption capacity determined for hybrid monoliths was 3.75 mg/g for Pb(II), 1.76 mg/g for Cu(II) and 1.5 mg/g for Cd(II). The desorption of metal ions for hybrid monoliths stable in aqueous solutions reached 70%.

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