Abstract
Newer biomass-derived adsorbents were developed from green pods of Cassia fistula apart from further nano-metal (Cu, Fe oxide, Ni) and acid modifications. The adsorbents were characterized by FE-SEM, HR-TEM, Powder XRD, BET and FTIR analysis. Removal studies on two different dyes, Malachite green and Congo red, revealed a very high adsorption capacity for the removal of malachite green dye, ∼1355 mg/g for Cu-nanocomposite, 661 mg/g for Fe-nanocomposite and 456 mg/g for unmodified adsorbent; also an order of magnitude, 2000% higher than the reported commercial carbon adsorbents. The results clearly highlight utility of bio-nanocomposites for wastewater treatment and dye removal.
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