Dried biomass and biochar were exposed to separate Fe solutions at a density of 25 g for 24 h on a shaker plate (100 rpm) at 20 then filtered from the solutions and rinsed three times with DI water at a rate of 20 ml , then dried at 60 for 48 h.
Driedbiomass and biochar were exposed to separate Fe solutions at adensity of 25 g for 24 h on a shaker plate (100 rpm) at 20then filtered from the solutions and rinsed three times with DIwater at a rate of 20 ml, then dried at 60 for 48 h.