High efficient removal of Pb (II) by amino-functionalized Fe3O4 magnetic nano-particles

A facile approach to the fabrication of rattle-type magnetic carbon nanospheres for removal of methylene blue in water

“…12b), and the calculated values of k 2 , Q e , and R 2 are summarized in Table S1. These results demonstrated that the pseudo-second-order model performs well in representing the kinetic data (R 2 > 0.99), and it indicates a typical chemical adsorption [53]. MB is an ideally planar molecule, and therefore it can be adsorbed easily by p-p stacking interactions between the aromatic backbone of the dye and the hexagonal skeleton of the carbon shell [54].…”

Removal of lead from aqueous solutions by a poly(acrylic acid)/bentonite nanocomposite

“…The corresponding Pb(II) removal by the nanocomposite was 99.6 % which was significantly greater than the 63.62 % removal by the Bent. Sorption of Pb(II) on the Bent also started with an initial rapid step followed by a slower one, but no pseudoequilibrium condition was reached within 24 h. The Bent sample partly reduced Pb concentration in solution from 400 to 143.6 mg L -1 after 24 h. Tan et al (2012) reported that rapid Pb adsorption on functionalized Fe 3 O 4 magnetic nanoparticles which occurred during the early stage may be due to the abundant availability of active sites on the adsorbents. With gradual decrease in the number of active sites, however, the uptake of Pb(II) ions became very slow.…”

Preparation of amine functionalized carbon nanotubes via a bioinspired strategy and their application in Cu2+ removal

“…In this study, the value of Q 0 (mg/g) for CNTs-PDA-PP nanoparticles is 539.5 mg/g at 292 K and the constant b from the Langmuir model is 0.051 L/mg. The equilibrium parameter R L is an essential factor of the Langmuir isotherm model, which is used to investigate if the adsorption is favorable or unfavorable [59]. The non-linear form of R L is defined as follows [60]:…”