期刊
CHEMICAL ENGINEERING JOURNAL
卷 277, 期 -, 页码 40-47出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2015.04.047
关键词
Prussian blue nanocomposite; Fe3+ crosslinking PAA resin; Radiocesium; Nuclear pollution
资金
- National Natural Science Foundation of China [21277142]
- Hundred Talent Project of CAS
- Binzhou University research project [BZXYG18]
- Cross-disciplinary Collaborative Teams Program for Science, Technology and Innovation of CAS
- Science and Technology Service Network Initiative (STS) Project of CAS
- Important Deployment Project of CAS [KZZD-EW-TZ-16]
A new nanocomposite, called FPPB, was prepared by the in situ synthesis of a Prussian blue (PB) nanocrystal within Fe3+ crosslinking poly(acrylic acid) (PM) resin for the highly efficient and rapid separation of radiocesium from water. The adsorption of Cs+ by FPPB follows the Langmuir and Freundlich isotherm model with distribution coefficients touched 1.15 x 10(5) mL/g and a good adsorption capacity of 72.47 mg/g (pH approximate to 7). FPPB displays high adsorption capacity for Cs+ capture under a wide pH range (4.0-10). The kinetics of Cs+ uptake by FPPB is fast (>90% elimination capacity of relatively low Cs+ concentrations during only 20 min of Cs+/FPPB contact) and fit well with the pseudo-second-order kinetic model. This should be attributed to the high dispersion of PB nanoparticles. The adsorption Cs+ from complex solutions containing various competitive cations in large excess was also effective. FPPB is a cost-effective sorbent and could be developed by only stirring using environmental friendly and inexpensive materials at room temperature. Furthermore, the FPPB-Cs+ can be easily retrieved from water with sieve. It is expected that the as-prepared FPPB has extensive applicability in the elimination of radiocesium from nuclear wastewater. (C) 2015 Elsevier B.V. All rights reserved.
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