Removal of copper (II) ion from aqueous solution using zeolite Y synthesized from rice husk ash: Equilibrium and kinetic study

Tuyen, Nguyen Thi Kim; Nhan, Do Nguyen Thanh; Nhat, Trieu Thi; An, Ngo Thanh; Long, Nguyễn Quang

doi:10.1063/1.5000184

Cited by 2 publications

(1 citation statement)

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“…The pseudo-second-order kinetic model is based on the assumption that the chemisorption is the rate-determining step [54]. However, the removal mechanism cannot be based on simple fitting of the pseudo-second-order model [55].…”

Section: Evaluation Of Kinetic Modelsmentioning

confidence: 99%

Synthesis of Zeolites from Greek Fly Ash and Assessment of Their Copper Removal Capacity

2020

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The objective of this study was to synthesize zeolites through fusion of lignite fly ash and NaOH or KOH pellets at 600 °C and assess their removal efficiency in terms of decontamination of solutions containing Cu(II) ions. The removal efficiency of the produced zeolites was tested in batch kinetic experiments using different zeolites and Cu(II) ion concentrations. Experimental data revealed that zeolites synthesized with the use of NaOH exhibited higher removal efficiency compared with those synthesized with the use of KOH. Kinetic data showed that the pseudo-second-order equations described well the removal process. Copper removal was mainly accomplished through the concerted action of chemisorption and intraparticle diffusion. Analytical techniques involving XRF, XRD, FTIR, SEM/EDS and XPS were used for the characterization and morphology analysis of the produced zeolites. SEM/EDS confirmed the presence of copper on the zeolite surface. XPS spectra of Cu2p at 934.3 eV proved the presence of Cu(II) oxidation state, confirming the possible formation of CuO and/or Cu-Cl.

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Section: Evaluation Of Kinetic Modelsmentioning

confidence: 99%