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- W2980212693 abstract "Abstract A humic acid coated nitrogen-doped magnetic porous carbon (HA-N-MPC) adsorbent was successfully synthesized using lignin isolated from black liquor as the main carbon source. SEM, TEM, FT-IR, XPS and N2 physisorption measurements showed the HA-N-MPC to possess a high specific surface area, a porous three dimensional structure with magnetic Fe3O4 nanoparticles uniformly embedded in the N-doped porous carbon matrix, and an abundance of surface functional groups for metal ion sorption. Cr(VI) adsorption experiments were subsequently carried out in aqueous solution at pH 2 using HA-N-MPC as the adsorbent. Results revealed that HA-N-MPC had a high adsorption capacity of 130.5 mg g−1 for Cr(VI), with partial reduction of toxic Cr(VI) to nontoxic Cr(III) occurring on adsorption. The adsorption kinetics and equilibrium adsorption isotherm determined for Cr(VI) on HA-N-MPC obeyed the pseudo-second-order model and Langmuir isotherm model, respectively. After magnetic separation from the sorption medium and regeneration, HA-N-MPC retained excellent adsorption performance for Cr(VI)." @default.
- W2980212693 created "2019-10-18" @default.
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- W2980212693 date "2020-01-01" @default.
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- W2980212693 title "Chromium (VI) adsorption and reduction by humic acid coated nitrogen-doped magnetic porous carbon" @default.
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- W2980212693 doi "https://doi.org/10.1016/j.powtec.2019.09.091" @default.
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