Breakthrough in Water Process Engineering: Researchers Develop New Adsorption Method for Lead Removal

Strategic Insights -

Researchers from the University of Extremadura in Badajoz, Spain, have made a significant breakthrough in water process engineering by developing a new adsorption method for lead removal from polluted waters. The research, published in the Journal of Water Process Engineering, focuses on the use of tannin-based materials to efficiently remove lead ions from aqueous solutions. The study demonstrates that the adsorption process reaches an efficiency of 67% and achieves a maximum adsorption capacity of 55 mg/g in the first 2 minutes of adsorbent-contaminant contact.

Key Takeaways:

  • The research focuses on the adsorption process of Pb(II) present in an aqueous solution using a tannin-based material synthesized through the sol-gel process.
  • The study demonstrates that the adsorption process reaches an efficiency of 67% for the adsorbent called MR4-pTSA at a concentration of 25 mg/L of Pb(II) at pH 7.
  • The kinetic study of the adsorption process indicates that equilibrium is reached in 30 minutes, and the Temkin model provides the best fit for the adsorption isotherm.
  • The pseudo-second order model better describes the kinetics of the adsorption process.
  • The results indicate that adsorption is favorable and occurs through chemisorption.
  • The researchers achieved a maximum adsorption capacity of 55 mg/g in the first 2 minutes of adsorbent-contaminant contact despite the low specific surface area of the studied materials (0.5 m²/g).

Statistics:

  • Efficiency of the adsorption process: 67%
  • Maximum adsorption capacity: 55 mg/g
  • Time to reach equilibrium: 30 minutes
  • pH of the aqueous solution: 7
  • Concentration of Pb(II): 25 mg/L

Sources:

  • Kinetic Study of Pb(Ii) Adsorption In Polluted Waters From Tannic Materials. Journal of Water Process Engineering, 2025;75.
  • NewsRx. Researchers at University of Extremadura Report New Data on Water Process Engineering [Kinetic Study of Pb(Ii) Adsorption In Polluted Waters From Tannic Materials]. Ecology, Environment & Conservation. July 11, 2025; p 1942.