Development of hybrid adsorbent for effective aqueous phase sorptive removal of copper
- Authors
- Kumar, Rahul; Kim, Sun joon; Kim, Kang-Ho; Kurade, Mayur B.; Lee, Sang-hun; Oh, Sang-Eun; Roh, Hyun-Seog; Jeon, Byong Hun
- Issue Date
- Apr-2018
- Publisher
- WILEY
- Keywords
- ion exchange; isotherm models; kinetics; sorption; X-ray photoelectron spectroscopy; zirconium oxide
- Citation
- SURFACE AND INTERFACE ANALYSIS, v.50, no.4, pp.480 - 487
- Indexed
- SCIE
SCOPUS
- Journal Title
- SURFACE AND INTERFACE ANALYSIS
- Volume
- 50
- Number
- 4
- Start Page
- 480
- End Page
- 487
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/150249
- DOI
- 10.1002/sia.6399
- ISSN
- 0142-2421
- Abstract
- Alginate beads (ABs) immobilized with hydrous zirconium oxide (ZO) were used as a hybrid adsorbent (ZO@AB) for the effective removal of copper ions [Cu(II)] from aqueous phase. ZO@AB was characterized using X-ray photoelectron spectroscopy to confirm the impregnation of ABs with ZO and the adsorption of Cu(II) onto ZO@AB. The maximum equilibrium sorption capacity of ZO@AB for Cu(II) was 63.1mgg(-1) at pH5. The Cu(II) removal rate was high at the beginning of reaction, with >90% adsorption within 24hours, and equilibrium was achieved within 48hours. The adsorption of Cu(II) onto ZO@AB was well described by pseudo-second-order kinetic model (R-2>0.99), and the monolayer nature of sorption was supported by the Langmuir model (R-2>0.99). The sorption process was endothermic, favorable, and spontaneous in nature. Regarding the reusability of the adsorbent, its sorption capacity remained satisfactory (>90%) throughout the 5 consecutive cycles (regeneration in 0.1molL(-1) HCl). The stoichiometric ratio of released calcium ions [Ca(II)] to adsorbed copper ions [Cu(II)] was approximately 1:1, confirming that ion exchange was the main mechanism for removal of Cu(II) from aqueous phase. The developed adsorbent (ZO@AB) shows promise as a candidate for the effective and selective removal of Cu(II) from aqueous phase.
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