E. coli@UiO-67 composites as a recyclable adsorbent for bisphenol A removal

Area of Science:

• Materials Science
• Environmental Science
• Nanotechnology

Background:

• Bisphenol A (BPA) is a widespread environmental pollutant.
• Efficient and cost-effective methods for BPA removal from water are needed.
• Metal-Organic Frameworks (MOFs) show promise as adsorbents.

Purpose of the Study:

• To develop a novel adsorbent for efficient BPA removal.
• To investigate the adsorption properties and mechanism of E. coli@UiO-67 composites.
• To evaluate the cost-effectiveness and reusability of the developed adsorbent.

Main Methods:

• A simple self-assembly method was used to synthesize E. coli@UiO-67 composites.
• Adsorption experiments were conducted to determine BPA removal efficiency and capacity.
• Characterization techniques, including PXRD, were employed to analyze the composite structure.
• Adsorption mechanisms were investigated through analysis of interactions like chemisorption, π-π interaction, and electrostatic attraction.

Main Results:

• E. coli@UiO-67 composites exhibited a high BPA adsorption capacity of 402.930 mg g⁻¹.
• The composites maintained 82.5% adsorption efficiency after 15 cycles, indicating excellent recyclability.
• Increased pore size and defects in the composites facilitated mass transport and improved adsorption.
• The adsorption process was identified as chemisorption involving Zr-OH groups, π-π interaction, and electrostatic attraction.

Conclusions:

• E. coli@UiO-67 composites are effective, recyclable, and cost-efficient adsorbents for BPA removal.
• The developed adsorbent offers advantages such as high capacity, stability, and ease of regeneration.
• This strategy presents a promising approach for developing high-performance MOF-based adsorbents for environmental pollution control.