Synthesis of zeolite Y from diatomite and its modification by dimethylglyoxime for the removal of Ni(II) from aqueous solution

Zeolite Y was obtained from diatomite in a template-free system, and the product was modified by dimethylglyoxime. Characterization studies indicate that the DMG molecules were loaded onto both the exterior surfaces and channels of the zeolite Y during the modification process. Removal of Ni(II) by...

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Bibliographic Details
Published in:Journal of sol-gel science and technology 2016-10, Vol.80 (1), p.215-225
Main Authors: Zhang, Shaoqing, Cui, Miao, Zhang, Yifu, Yu, Zhihui, Meng, Changgong
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
Ceramics
Chemical reactions
Chemistry and Materials Science
Composites
Diatomaceous earth
Endothermic reactions
Glass
Inorganic Chemistry
Materials Science
Nanotechnology
Natural Materials
Nickel
Optical and Electronic Materials
Organic chemistry
Original Paper: Sol-gel and hybrid materials with surface modification for applications
Parameters
Reaction kinetics
Selectivity
Sorbents
Zeolites
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Summary:Zeolite Y was obtained from diatomite in a template-free system, and the product was modified by dimethylglyoxime. Characterization studies indicate that the DMG molecules were loaded onto both the exterior surfaces and channels of the zeolite Y during the modification process. Removal of Ni(II) by modified samples was investigated in batch procedure, and it was found that the modified zeolite Y has a very high capacity. The effects of various parameters such as sorbent content, contact time, concentration of nickel solution, pH and selectivity were discussed. The best removal efficiency was observed by Y-DMG at the following experimental conditions: Y-DMG dosage: 2 g L −1 , C Ni(II) : 100 mg L −1 and contact time: 9 h. The Y-DMG sorbent shows good efficiency for the removal of nickel in the presence of different multivalent cations. Adsorption kinetics based on the pseudo-second-order rate equation indicates that the rate-limiting step involves chemical reaction. Adsorption isotherms of Ni(II) ions obey Langmuir equation which indicates the monolayer sorption of Ni(II). The results of thermodynamic parameters of Ni(II) on Y-DMG indicate the process was endothermic and spontaneous. Graphical Abstract
ISSN:0928-0707
1573-4846
DOI:10.1007/s10971-016-4080-6