Adsorption isotherms and kinetics for Pb(ii) ion removal from aqueous solutions with biogenic metal oxide nanoparticles

Abstract

This study investigates the sorption removal of lead(ii) ions using zinc oxide (ZnO) and copper(ii) oxide (CuO) nanoparticles synthesized through a wet combustion synthesis with the aid of plant extract from Serratula coronata L.

Graphene Oxide–Polyphenylsulfone Nanocomposite Beads for Paracetamol Removal from Aqueous Solution

“…The mechanism underlying these observations can be attributed to the interplay between pH and the surface charge of the adsorbents. At a lower pH (pH 3), the surface of the nanocomposite beads may carry a net positive charge, which is less favorable for the adsorption of paracetamol, given its predominantly negative charge [ 38 , 39 ]. As the pH increases toward neutrality (pH 7), the surface charge of the nanocomposite beads becomes more negative.…”

Highly Efficient Adsorption of Pb(II) by Functionalized Humic Acid: Molecular Experiment and Theoretical Calculation

“…At the same time, Pb 4f 5/2 and 4f 7/2 have two obvious peaks at 143.63 and 138.67 eV, respectively, with an energy gap of 4.96 eV, which is due to the formation of the Pb-O bond. The FTIR spectra at 3351 cm −1 and 1704 cm −1 were found to be related to the coordination of -OH and C-O (carboxyl and carbonyl) groups on OBC, respectively; 1246 cm −1 was the combination of in-plane bending vibration and Pb(II) [52,53]. The peak at 688 cm −1 is Pb-O.…”

Effect of copper doping on the photocatalytic performance of Ni2O3@PC membrane composites in norfloxacin degradation

“…The determination of the surface charge of the adsorbent based on pH values was carried out by studying the pH zpc (point of zero charge) value across the pH range from 3.0 to 8.0, following the method described in ref. 46. For this, 10 mL of a 0.01 M NaCl solution was adjusted to the desired pH value (pH i ) using 0.1 M HCl(aq) or NaOH(aq).…”