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Nanogold Labeling of the Yeast Endosomal System for Ultrastructural Analyses
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As(V) removal using carbonized yeast cells containing silver nanoparticles.

R Selvakumar1, N Arul Jothi, V Jayavignesh

  • 1Department of Microbial Biotechnology, School of Biotechnology and Genetic Engineering, Bharathiar University, Coimbatore, India. selvabiotech@gmail.com

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|October 16, 2010
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Summary

This study developed a novel yeast-based adsorbent for arsenate removal. Carbonized yeast cells with silver nanoparticles (CSY) effectively removed arsenate from water, outperforming controls.

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Area of Science:

  • Environmental Science
  • Nanotechnology
  • Microbiology

Background:

  • Arsenate contamination in water poses significant health risks.
  • Developing efficient and sustainable adsorbents for arsenate removal is crucial.
  • Biological synthesis of nanoparticles offers an eco-friendly approach.

Purpose of the Study:

  • To develop a novel adsorbent material for arsenate removal using silver nanoparticles synthesized by yeast.
  • To characterize the synthesized silver nanoparticles and the adsorbent material.
  • To evaluate the arsenate adsorption efficiency of the developed material.

Main Methods:

  • Isolation and identification of a novel yeast strain, *Saccharomyces cerevisiae* BU-MBT-CY1.
  • Biological reduction of silver ions by yeast and subsequent carbonization to form CSY.
  • Characterization of CSY using FTIR, XRD, SEM-EDS, and TEM.
  • Batch adsorption experiments to determine As(V) removal efficiency, kinetics, and isotherms.
  • Desorption studies to assess adsorbent reusability.

Main Results:

  • Successfully synthesized silver nanoparticles (19 ± 9 nm) on carbonized yeast cells (CSY).
  • CSY demonstrated significantly higher arsenate adsorption efficiency compared to carbonized control yeast cells (CCY).
  • Adsorption followed Langmuir and pseudo-second-order kinetic models, indicating chemisorption.

Conclusions:

  • The developed CSY adsorbent is effective for arsenate removal from aqueous solutions.
  • Biological synthesis of silver nanoparticles by yeast offers a sustainable route for adsorbent development.
  • This approach holds promise for practical water treatment applications.