Adsorption kinetics and thermodynamics of Ni (II) by Pisha sandstone
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RESEARCH PAPER
Adsorption kinetics and thermodynamics of Ni (II) by Pisha sandstone Feng-min Song & Hong-guang Ge & Juan Shi & Zhi-feng Liu & Chen Li & Bo Tang
Received: 20 March 2020 / Accepted: 28 May 2020 # Springer Nature B.V. 2020
Abstract The red Pisha sandstone was taken as absorbents to investigate the effects of the solution pH, the adsorption time and temperature adsorption onto Ni (II) absorption by the Pisha sandstone, and used dynamics and thermodynamic absorption models, coupled with microcalorimetry and infrared spectroscopic (FTIR) analysis, and scanning electron microscope-energy dispersive spectrometer (SEM-EDS); it aimed to determine the mechanism of thermodynamics and kinetics for Pisha sandstone absorbing Ni (II). The results indicated that the adsorption was performed at 293 K, pH 7, and the equilibrium was reached at 30 min, and the adsorption capacity of Ni (II) was 23.688 mg/g; the adsorption process of Ni (II) onto Pisha sandstone could be described with the Lagrangian pseudo-second-order kinetic model, the Freundlich model, and Dubinin-
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