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- W2890739188 abstract "Molecular dynamics (MD) simulation was applied to investigate the adsorption mechanism of chlortetracycline (CTC) antibiotic molecule as the aqueous pollutant on the Fe3O4 nanoparticle (NP). Two different NP sizes with a diameter of about 1.4 nm and 3.5 nm were selected. Initially, the stability of both NPs in water was investigated by calculating radial distribution function curves of NP atoms. Simulation results confirmed the stable crystallographic structures of both NPs. However, small NP induce greater structural stabilization. Then, CTC molecules were adsorbed on NPs surface in various pollutant concentrations. Electrostatic and hydrogen bond were the major types of interactions between CTC molecules and the adsorbent surface. CTC molecules formed a complex with NP surface from their amine side chains; while they were parallel to each other in their aromatic rings and π-π bond between two CTC molecules was formed. Diffusion rate of CTC molecules could predict the adsorption mechanism. At lower concentration of CTC, CTC molecules tend to adsorb on the NP surface. At these concentrations, the diffusion rate of CTC was high. By increasing the CTC concentration, the pollutant agglomeration was enhanced which decreased the diffusion rate. At this time, the surface of NP was saturated. In addition, the results of isotherm curves showed that CTC adsorption on small NPs could be defined with both Langmuir and Freundlich isotherm models, while Freundlich isotherm model was more appropriate for larger NPs. In conclusion, observations confirmed that MD simulation could successfully predict the behavior of CTC adsorption on the Fe3O4 NP surface. Communicated by Ramaswamy H. Sarma." @default.
- W2890739188 created "2018-09-27" @default.
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- W2890739188 date "2019-01-11" @default.
- W2890739188 modified "2023-09-27" @default.
- W2890739188 title "Prediction of chlortetracycline adsorption on the Fe<sub>3</sub>O<sub>4</sub> nanoparticle using molecular dynamics simulation" @default.
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- W2890739188 doi "https://doi.org/10.1080/07391102.2018.1521746" @default.
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