Fig. 2
From: Magnetic orange leaf biochar for favipiravir removal from wastewater
(a) Collection of orange leaves from an orchard; (b) Grinding of leaves to a particle size of 100 mesh and subsequent preparation with distilled water; (c) High-speed agitation of the biomass solution to ensure uniform dispersion; (d) Drying in an oven at 80 °C for a duration of 24 h; (e) Impregnation of the dried biomass with zinc chloride (ZnCl₂) and iron(III) chloride hexahydrate (FeCl₃·6 H₂O); (f) Accurate weighing of zinc chloride for impregnation; (g) Accurate weighing of iron(III) chloride hexahydrate; (h) Final preparation of the modified biomass for subsequent analysis.
