Precious metal recovery by selective adsorption using biosorbents

Chen, Xinqing; Lam, Koon Fung; Mak, Shuk Fong; Yeung, King Lun

doi:10.1016/j.jhazmat.2010.11.088

Cited by 154 publications

(49 citation statements)

References 62 publications

(73 reference statements)

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“…The experimental data could be reproduced with an accuracy greater than 95%. 21 The results indicated that magnetic CS was successfully graed on to GO.…”

Section: Adsorption Experimentsmentioning

confidence: 97%

Magnetic ZnFe₂O₄@chitosan encapsulated in graphene oxide for adsorptive removal of organic dye

Xiao

Zhong

et al. 2017

RSC Adv.

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Graphene-based multifunctional composites were prepared by encapsulating of magnetic ZnFe 2 O 4 @chitosan (ZnFe 2 O 4 @CS) particles into graphene oxide (GO) layers. The obtained ZnFe 2 O 4 @CS/ GO were characterized using scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Adsorption of basic fuchsin (BF) onto the ZnFe 2 O 4 @CS/GO was investigated using pH, adsorption time, initial BF concentration and temperature.Kinetic data and adsorption isotherms were better fitted by a pseudo-second-order kinetic model and

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“…The experimental data could be reproduced with an accuracy greater than 95%. 21 The results indicated that magnetic CS was successfully graed on to GO.…”

Section: Adsorption Experimentsmentioning

confidence: 97%

Magnetic ZnFe₂O₄@chitosan encapsulated in graphene oxide for adsorptive removal of organic dye

Xiao

Zhong

et al. 2017

RSC Adv.

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“…28 A slight increase in the C1s binding energy in C=N (286.48 eV) after Au III adsorption on DMTD-PT indicates a potential interaction between Au III and a functional group containing C=N. The adsorption of metallic ions influences both the local chemical environment and the entire hydrophobic and hydrophilic nature of the biosorbent, 29 and thereby, such adsorption affects the accessibility of active sites for biosorption.…”

Section: IIImentioning

confidence: 99%

Selective Adsorption of AuIII from Aqueous Solution Using 2,5‑Dimercapto‑1,3,4‑thiadiazole Modified Persimmon Tannin

Zhang

et al. 2018

J. Braz. Chem. Soc.

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A one-pot synthesized persimmon tannin (PT)-based novel biosorbent modified with 2,5-dimercapto-1,3,4-thiadiazole (DMTD) was prepared for the selective adsorption of Au III from aqueous mixtures. The synthesized biosorbent was designated as DMTD-PT and characterized using elemental analysis, zeta potential, Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). The batch adsorption experiments in a model electronic waste leachate revealed that both DMTD-PT and PT had poor affinity for coexisting base metal ions, however, DMTD-PT and PT adsorbed 97.7 and 32.7%, respectively, of Au III with an initial Au .A kinetic study in combination with XPS and FTIR analyses of fresh and spent DMTD-PT further revealed that the potential biosorption mechanism can be attributed to the collaboration of electrostatic interactions and coordination.

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“…A ligand exchange mechanism has also been proposed to proceed during the adsorption of AuCl4 -onto alfalfa biomass with the -COOH group being an important active site. The adsorption of AuCl4 -onto alfalfa biomass reached a maximum value at pH 2-3 [38], being accompanied by the release of three moles of Cl -ions per mole of Au adsorbed [39]. The liberation of this amount of Cl -ions suggests that the adsorbed Au species must exist as a mono chloraurate(III) complex, being bound to the -COOH group via hydrogen bonding.…”

Section: Effect Of Medium Phmentioning

confidence: 99%

The Role of Carboxyl and Hydroxyl Groups of Humic Acid in Removing AuCl<sub>4</sub><sup>-</sup> from Aqueous Solution

et al. 2017

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Precious metal recovery by selective adsorption using biosorbents

Cited by 154 publications

References 62 publications

Magnetic ZnFe₂O₄@chitosan encapsulated in graphene oxide for adsorptive removal of organic dye

Magnetic ZnFe₂O₄@chitosan encapsulated in graphene oxide for adsorptive removal of organic dye

Selective Adsorption of AuIII from Aqueous Solution Using 2,5‑Dimercapto‑1,3,4‑thiadiazole Modified Persimmon Tannin

The Role of Carboxyl and Hydroxyl Groups of Humic Acid in Removing AuCl<sub>4</sub><sup>-</sup> from Aqueous Solution

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Precious metal recovery by selective adsorption using biosorbents

Cited by 154 publications

References 62 publications

Magnetic ZnFe2O4@chitosan encapsulated in graphene oxide for adsorptive removal of organic dye

Magnetic ZnFe2O4@chitosan encapsulated in graphene oxide for adsorptive removal of organic dye

Selective Adsorption of AuIII from Aqueous Solution Using 2,5‑Dimercapto‑1,3,4‑thiadiazole Modified Persimmon Tannin

The Role of Carboxyl and Hydroxyl Groups of Humic Acid in Removing AuCl<sub>4</sub><sup>-</sup> from Aqueous Solution

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Product

Resources

About

Magnetic ZnFe₂O₄@chitosan encapsulated in graphene oxide for adsorptive removal of organic dye

Magnetic ZnFe₂O₄@chitosan encapsulated in graphene oxide for adsorptive removal of organic dye