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- W4385693756 abstract "In this paper, we present an all-atomistic molecular dynamics simulation study to understand the separation of cadmium (Cd2+) and lead (Pb2+) from the aqueous waste using directional solvent extraction (DSE) using decanoic acid (DEC) as an extractant. Different structural, dynamic, and thermodynamic properties were evaluated such as mass density profiles, radial distribution functions, self-diffusion, solvation free energy (ΔGSolv), and transfer free energy (ΔGTransfer). The peak intensity of mass density distribution of Cd(NO3)2 and Pb(NO3)2 shows an increase with an increase in temperature (T). The radial distribution function between the Cd2+ and NO3– and Pb2+ and NO3– shows a significantly higher interaction with the maximum interaction between Cd2+ and NO3–. Compared to the intermolecular structure between bulk water and solvent mixed systems, we observe that metal ion water interactions are higher in bulk water, which start to decrease in the presence of a solvent. We further investigate thermodynamic analysis using free energy simulations. The ΔGSolv of Cd2+ and Pb2+ becomes favorable with an increase in T in DEC, while it becomes unfavorable in H2O. The ΔGTransfer of Cd2+ and Pb2+ from H2O to DEC becomes favorable with an increase in T. The partition coefficient (log P) values show positive values for Cd2+ and Pb2+. The self-diffusion (D) of metal ions shows a 60% decrease for Cd2+ and a 75% decrease for Pb2+ compared to their D values in bulk water. The D values of H2O increase with T. Overall, we observe that the H2O, solvent, and metal ions are sensitive to the temperature. These molecule-level results help in guiding the solvent design for separating heavy metal ions using DSE." @default.
- W4385693756 created "2023-08-10" @default.
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- W4385693756 date "2023-08-09" @default.
- W4385693756 modified "2023-09-27" @default.
- W4385693756 title "Molecular Simulations of Understanding Separation of Cadmium and Lead Ions from Aqueous Waste Water Using Directional Solvent Extraction" @default.
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- W4385693756 doi "https://doi.org/10.1021/acs.iecr.3c01329" @default.
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