Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 562, Issue -, Pages 329-335Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2018.11.029
Keywords
Uranium(VI); NiAl-LDH/PPy; Adsorption; Seawater
Categories
Funding
- National National Science Foundation of China [NSFC 51872057]
- Application Technology Research and Development Plan of Heilongjiang Province [GX16A009]
- Fundamental Research Funds of the Central University
- Natural Science Foundation of Heilongjiang Province [QC2018010]
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In this work, NiAl-LDH/Polypyrrole (NiAl-LDH/PPy) was synthesized by a simple method for the adsorption of uranium(VI) (U(VI)) from simulated seawater. The parameters studied contained pH, contact time, initial concentration and temperatures. The kinetic parameters showed that it could be well consistent with pseudo-second-order model. Langmuir and Freundlich isotherm models were used to describe the equilibrium data at three different temperatures (25, 35 and 45 degrees C). The result confirmed that the adsorption equilibrium tend to follow Langmuir isotherm model and the maximum adsorption capacity was evaluated to be 406.5 mg/g at 45 degrees C. The adsorption was a spontaneous endothermic process. NiAl-LDH/PPy also had good reproducibility and selectivity. In simulated seawater, NiAl-LDH/PPy composites showed a good enrichment effect for U(VI).
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