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• W4281630841 endingPage "109588" @default.
• W4281630841 startingPage "109588" @default.
• W4281630841 abstract "• nZVI-SBE@C was prepared by anoxic pyrolysis and liquid phase reduction. • When C/Fe = 1/2, nZVI-SBE@C has the best removal efficiency for Pb(II). • Nitrogen atmosphere is more favorable to Pb(II) removal than air atmosphere. • Mechanism: adsorption, electrostatic attraction, ion exchange, reduction. In this study, nanoscale zero-valent iron-carbon materials based on the oil refining byproducts (nZVI-SBE@C) were prepared through anoxic pyrolysis and liquid phase reduction method, and its ability to remove Pb(II) from aqueous solution was tested for the first time. In preparation process, when the mass ratio of C/Fe is 1:2, nZVI-SBE@C has the maximum removal capacity of Pb(II) (182.29 mg/g), which is four times that of SBE@C (51.37 mg/g). In the research of Pb(II) removal behavior, adsorption process by nZVI-SBE@C was fitted well with Langmuir isotherm model and pseudo-second-order kinetic model, and the Langmuir monolayer maximum adsorption capacity of nZVI-SBE@C for Pb(II) was 223.52 mg/g. In the N 2 and air initial atmosphere, Pb(II) removal reached 95.37% and 42.37%, respectively, which were higher than that in blank control group (24.44%). The promotion order of the coexisting cations for nZVI-SBE@C to remove Pb(II) is: Na + > K + > Mg 2+ (the effect of NO 3 – ), and the inhibition order is: Cu 2+ < Fe 3+ < Al 3+ (the effect of the solubility products of precipitation as well as ionic radius). Pb(II) removal by nZVI-SBE@C increased with the increase of initial solution pH (2.30–5.80). Though the characterization of the materials before and after the reaction, meanwhile combining with experimental data, Pb(II) removal mechanisms of nZVI-SBE@C may include surface adsorption, electrostatic attraction, ion exchange, surface complexation and nZVI reduction (small portion)." @default.
• W4281630841 created "2022-06-13" @default.
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• W4281630841 date "2022-07-01" @default.
• W4281630841 modified "2023-10-16" @default.
• W4281630841 title "The behavior and mechanism of toxic Pb(II) removal by nanoscale zero-valent iron-carbon materials based on the oil refining byproducts" @default.
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• W4281630841 doi "https://doi.org/10.1016/j.inoche.2022.109588" @default.
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