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논문 기본 정보

자료유형
학술저널
저자정보
Kamran Haghighi Hossein (Department of Mining Engineering Amirkabir University of Technology Tehran Iran) Irannajad Mehdi (Department of Mining Engineering Amirkabir University of Technology Tehran Iran) MohammadJafari Alireza (Department of Mining Engineering Amirkabir University of Technology Tehran Iran)
저널정보
한국자원공학회 Geosystem Engineering Geosystem Engineering Vol.24 No.2
발행연도
2021.1
수록면
101 - 113 (13page)

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초록· 키워드

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In this study, for the first time, nano-sized clinoptilolite zeolite produced by a dry planetary ball mill in the presence of sodium hexametaphosphate was employed to remove heavy metals. Results represented that the concentration of adsorbed ions on nano-zeolite increases with increasing pH, initial concentration of metals, and temperature. The maximum adsorption efficiency for Ni2+, Cd2+, and Cu2+ was found to be 74.20%, 97.60%, and 99.50% at a pH of 7.5 and 60°C, respectively. The adsorption of Ni2+, Cd2+ and Cu2+ on nano-zeolite increased from 44.40% to 74.20 %, 76.4% to 97.60%, and 94.30% to 99.50% by enhancing temperature from 20 to 60 °C. Furthermore, Gibbs’s free energy obtained from thermodynamic evaluations depicted that adsorptions had spontaneous behavior. According to Langmuir models, the maximum capacity (qm) of Ni2+, Cu2+, and Cd2+using nano-zeolite was found to be 17.79, 17.92, and 18.32 mg/g. Adsorption isotherms showed that results fitted better on the Langmuir model for Ni2+and Cu2+ and the Freundlich model for Cd+2 because the correlation coefficients (R2) were 0.99 for them. Finally, the pseudo-second-order kinetic model was selected to interpret the experimental data.

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