Design of iron-ion-doped pomelo peel biochar composites towards removal of organic pollutants

Abstract

After treated with saturated iron(II) chloride water solution at pH ~ 2, pomelo peel was used as precursor for preparation of 3 biochar composites (named CFe1, CFe2 and CFe3, accordingly) via hydrothermal treatment and followed calcination in air, respectively. The as-obtained C/Fe biochar composites were studied with PXRD, SEM, EDS, UV-visible spectroscopy and specific surface area device to analyze their phase, morphology, composition, capacity for light absorption and specific surface area. Furthermore, the adsorption and photocatalytic performances of the 3 biochar composites on rhodamine B (RhB) water solution were investigated. The experimental results show that the hydrothermal pomelo peel biochar composites have better adsorption performance in degrading RhB than that obtained from calcining pomelo peel in air, but opposite for the photocatalytic performance. The removal of imidacloprid (a pesticide) from water via CFe1 was also studied.

Magnetic Fe3O4 Nanoparticle Biochar Derived from Pomelo Peel for Reactive Red 21 Adsorption from Aqueous Solution

“…Fe 3 O 4 magnetic pomelo peel powder was synthesized for the adsorption of Cu 2+ [32] and oil-polluted water [33] from an aqueous solution. Iron-doped pomelo peel biochar was applied to adsorb Rhodamine B [34]. However, to the best of the research group's knowledge, no study on using Fe 3 O 4 magnetic pomelo peel powder for RR21 removal has been conducted.…”