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Adsorption and Removal of Cr6+, Cu2+, Pb2+, and Zn2+ from Aqueous Solution by Magnetic Nano-Chitosan.
| Content Provider | Europe PMC |
|---|---|
| Author | He, Yuran Zhang, Panqing Wang, Lijun |
| Editor | Dong, Guohui Chen, Na Liu, Wei Bi, Jingtao |
| Copyright Year | 2023 |
| Abstract | Magnetic nano-chitosan (MNC) was prepared and characterized. The kinetics, thermodynamics, and influencing factors of the adsorption of Cr6+, Cu2+, Pb2+, and Zn2+, as well as their competitive adsorption onto MNC in aqueous solution, were studied. The results showed that the adsorption kinetics and thermodynamics of Cr6+, Cu2+, Pb2+, and Zn2+ were well described by the pseudo-second-order kinetic model and Langmuir isothermal adsorption model, indicating that the adsorption was mainly chemical adsorption and endothermic. Increasing the dosage of MNC, the equilibrium adsorption capacity (qe) of Cr6+, Cu2+, Pb2+, and Zn2+ decreased; their removal rate (η) increased. With the increase in the solution's pH, the qe and η of Cr6+ first increased and then decreased; the qe and η of Cu2+, Pb2+, and Zn2+ increased. With the increase in the metal ion initial concentration, the qe increased; the η of Cr6+, Cu2+, and Zn2+ decreased, while the η of Pb2+ increased first and then decreased. Temperature had a weak influence on the qe of Cr6+ and Pb2+, while it had a strong influence on Cu2+ and Zn2+, the qe and η were greater when the temperature was higher, and the adsorption was spontaneous and endothermic. The qe and η of Cu2+, Pb2+, and Zn2+ decreased in the presence of co-existing ions. The influences among metal ions existed in a binary and ternary ion system. The current study's results provide a theoretical support for the simultaneous treatment of harmful metal ions in wastewater by MNC. |
| Journal | Molecules |
| Volume Number | 28 |
| DOI | 10.3390/molecules28062607 |
| PubMed Central reference number | PMC10056453 |
| Issue Number | 6 |
| PubMed reference number | 36985579 |
| e-ISSN | 14203049 |
| Language | English |
| Publisher | Molecular Diversity Preservation International (MDPI) |
| Publisher Date | 2023-03-13 |
| Access Restriction | Open |
| Subject Keyword | magnetic nano-chitosan preparation and characterization heavy metal ion adsorption removal |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physical and Theoretical Chemistry Medicine Chemistry Drug Discovery Pharmaceutical Science Analytical Chemistry Molecular Medicine Organic Chemistry |
