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Study of 63Ni adsorption on NKF-6 zeolite by Hui Zhang; Xianjin Yu; Lei Chen; Yongjie Jing; Zhiwei Ge is a Environmental Science article available to read on EtoBox.

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The adsorption of 63 Ni from aqueous solutions using NKF-6 zeolite was investigated by a batch technique under ambient conditions. The adsorption was investigated as a function of contact time, pH, ionic strength, foreign ions, humic substances (FA/HA) and temperature. The kinetic adsorption was well described by the pseudo-second-order rate equation. The adsorption of 63 Ni on NKF-6 zeolite was strongly dependent on pH and ionic strength, and the adsorption of 63 Ni increased with increasing NKF-6 zeolite content. At low pH values, the presence of FA enhanced the adsorption of 63 Ni on NKF-6 zeolite, but the presence of HA had no drastic effect. At high pH values, the presence of FA or HA decreased the adsorption of 63 Ni on NKF-6 zeolite. The adsorption isotherms were well represented by the Langmuir model. The thermodynamic parameters (i.e., DH 0 , DS 0 and DG 0 ) for the adsorption of 63 Ni were determined from the temperature dependent isotherms at 293.15, 313.15 and 333.15 K, respectively, and the results indicate that the adsorption reaction was favored at high temperature. The results suggest that the adsorption process of 63 Ni on NKF-6 zeolite is spontaneous and endotherm

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Author

Hui Zhang; Xianjin Yu; Lei Chen; Yongjie Jing; Zhiwei Ge

Publisher

Elsevier Science; Elsevier ; Elsevier BV; Publons (ISSN 0265-931X)

Published

2010

Language

EN

Field

Environmental Science (Physical Sciences)