Magnetic Fe3O4/activated carbon for combined adsorption and Fenton oxidation of 4-chlorophenol

Efficient and selective removal of Pb(ii) from aqueous solution by a thioether-functionalized lignin-based magnetic adsorbent

“…The obtained kinetics data was tted by the pseudo-rstorder model (eqn (3)), pseudo-second-order model (eqn ( 4)) and intraparticle diffusion model (eqn ( 5)) to evaluate the relationship between the adsorption rate and capturing mechanism, respectively, 44 and the tting results are presented in Fig. 3c and d:…”

ZIF-67 Derived Co Nanoparticles Embedded N-Doped Mesoporous Carbon Nanocages as an Active Heterogeneous Fenton Catalyst for the Degradation of Tetracycline

“…(especially sharply from 85.6% to 69.5% as pH increased from 7.02 to 7.95). Acidic conditions favor the production of reactive radicals, and hydroxyl radicals show higher oxidation potential (2.80 eV) under acidic conditions than under neutral condition (1.90 eV) (Duan et al 2020;Qu et al 2020). Hydroxyl radicals generated may be scavenged by H + under strong acidic conditions, whereas the combination of OH-with active catalytic components (Fe 2+ and Fe 3+ ) may inhibit the catalytic potential on radical production (Kuang et al 2013;Xu et al 2012).…”

“…In this work, ZIF-67 was prepared using solution method as reported (Wang et al 2020c) and occupied as precursor for the synthesis of the hollow Co-modified N-dopped porous carbon nanocages (HCo@NC). The large BET surface area and hollow structure provided it a large amount of active site for adsorption and catalysis, and catalytic reactions may be promoted by adsorption (Zhu et al 2020;Wu et al 2020;Duan et al 2020). The HCo@NC obtained performed excellent in the degragdation of Tetracycline (TC), and batch experiments were carried out to explore the influence of factors on the catalytic behavior in Fenton-like system, including pH, temperature, dosage of adsorbent and initial concentration of pollutant.…”

Fabrication of Lignin-based Magnetic Adsorbent via Thiol-ene Click Reaction for the Effective Removal of Pb(II)

“…4) and intraparticle diffusion model (Eq. 5) to evaluate the relationship between adsorption rate and capturing mechanism, respectively [39], and the tting results were presented in Fig. 3c-d: (3) (4) ( 5)…”

“…4) and intraparticle diffusion model (Eq. 5) to evaluate the relationship between adsorption rate and capturing mechanism, respectively [39], and the tting results were presented in Fig. 3c-d where q e (mg/g) and q t (mg/g) are the Pb(II) adsorption capacity at equilibrium time and time t, respectively, k 1 (1/min) the pseudo-rst-order adsorption kinetic constant, k 2 [g/(mg•min)] the pseudosecond-order adsorption kinetic constant, k p [g/(mg•min 0.5 )] the intraparticle diffusion rate constant, and C a constant.…”