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Nanotechnology

Effective Removal of Arsenic(III) through Nanotechnology

Strategic Insights

— 1 min read

Researchers at Deen Dayal Upadhyay Gorakhpur University in Uttar Pradesh, India have made significant progress in developing a highly efficient nanocomposite for the removal of arsenic(III) from wastewater. Through in-situ polymerization, a polypyrrole-coated cobalt ferrite (PPy@CoFe2O4) magnetic nanosorbent was synthesized, demonstrating optimal removal efficiency at a pH of 6.0 to 7.0 with an adsorbent dosage of 40 mg. The nanosorbent showed a maximal monolayer adsorption capacity of 201.4 mg/g under optimum conditions and followed a pseudo-second-order kinetic model with an equilibrium time of 210 min.

Key Takeaways:

  • Researchers at Deen Dayal Upadhyay Gorakhpur University have developed a highly efficient nanocomposite (PPy@CoFe2O4) for the removal of arsenic(III) from wastewater.
  • The optimal removal efficiency of 99% occurred at a pH of 6.0 to 7.0 with an adsorbent dosage of 40 mg.
  • The nanosorbent demonstrated a maximal monolayer adsorption capacity of 201.4 mg/g under optimum conditions.
  • The adsorption process followed a pseudo-second-order kinetic model with an equilibrium time of 210 min.
  • The removal efficiency of the nanosorbent was still higher than 94% after five adsorption-desorption cycles.
  • The adsorption of arsenic(III) onto PPy@CoFe2O4 is strongly influenced by the pH of the medium, with electrostatic interaction being the main mechanism of adsorption.

Statistics:

  • 201.4 mg/g: maximal monolayer adsorption capacity of the PPy@CoFe2O4 nanosorbent
  • 99%: optimal removal efficiency at a pH of 6.0 to 7.0 with an adsorbent dosage of 40 mg
  • 210 min: equilibrium time of the adsorption process
  • 5: number of adsorption-desorption cycles performed
  • 94%: removal efficiency after 5 adsorption-desorption cycles

Sources:

  • Preparation of Polypyrrole@cofe 2 o 4 Nanocomposite for the Adsorptive Removal of Arsenic(Iii): Kinetic and Mechanistic Analysis. Journal of Inclusion Phenomena and Macrocyclic Chemistry, 2025.
  • Deen Dayal Upadhyay Gorakhpur University. Department of Chemistry. Gorakhpur 273009, Uttar Pradesh, India.

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