PREPARATION AND CHARACTERIZATION OF SHOREA ROBUSTA BARK BASED BIOSORBENT FOR THE REMOVAL OF Cr(VI) IN DRINKING WATER
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Amrit Campus
Abstract
Activated carbons have been used in the removal of heavy metal. High surface area and
porosity of activated carbon materials support in the removal of heavy metal ions. In
this work, biochar has been synthesized from Shorea robusta bark. Excellent removal
efficiency from methylene blue and iodine number can be seen in S. robusta treated
with Zinc chloride. Due to the pHzpc of activated carbon and biochar having 6.16 and
4.62, respectively, this sorbent may effectively remove cationic Cr(VI) contaminants
from alkaline aqueous solutions. Using the batch adsorption approach, the adsorption
of Cr(VI) ions on biochar and chemically modified biochar of S. robusta has been
examined in this study. The outcome demonstrates that all the factors that affected the
removal of Cr(VI) by adsorption were discovered at pH 2, starting concentration of 50
ppm, equilibrium period of 120 minutes, and adsorbent dose of 50 mg. Kinetic data are
presented after the pseudo second order kinetic model. By using FTIR and XRD,
sample characteristics was examined. The experimental findings suggest that S. robusta
can be used as a low-cost commercial alternative adsorbent to remove Cr(VI) from
wastewater