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A novel chitosan/clay/magnetite composite for adsorption of Cu(II) and As(V)

Title
A novel chitosan/clay/magnetite composite for adsorption of Cu(II) and As(V)
Other Titles
clay
Author
전병훈
Keywords
Copper; Arsenic; Chitosan; Clay; Magnetite; Tripolyphosphate
Issue Date
2012-07
Publisher
Elsevier
Citation
Chemical Engineering Journal, 2012, 200-202, P.654~662
Abstract
A composite adsorbent was prepared by entrapping cross-linked chitosan and nano-magnetite (NMT) on heulandite (HE) surface to remove Cu(II) and As(V) in aqueous solution. The optimized mass ratio among chitosan, HE, and NMT was determined to be 1:1:2. Kinetics studies indicated the removal of both ions followed pseudo-second order kinetics, suggesting specific interaction with surface functional groups was the major route of the removal process. The composite gave the maximum equilibrium uptakes of Cu(II) and As(V) of 17.2 and 5.9 mg g−1 in initial concentration ranges of 16–656 and 17–336 mg L−1, respectively. The thermodynamic data showed that both adsorption processes were thermodynamically favorable, spontaneous, and endothermic nature. The adsorption capacity for Cu(II) increased continuously with an increase in initial solution pH (3–9), but adsorption of As(V) showed an opposite trend. The overall results demonstrated the potential utility of the composite for Cu(II) and As(V) removal from aqueous solutions.
URI
https://www.sciencedirect.com/science/article/pii/S138589471200856X?via%3Dihubhttp://hdl.handle.net/20.500.11754/66374
ISSN
1385-8947
DOI
10.1016/j.cej.2012.06.126
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > EARTH RESOURCES AND ENVIRONMENTAL ENGINEERING(자원환경공학과) > Articles
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