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Regulating defective sites for pharmaceuticals selective removal: Structure-dependent adsorption over continuously
Yuhua Cao1, Xiang Li1, Gang Yu2
1School of Chemistry and Chemical engineering, Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100084, China.
Journal of Hazardous Materials
|September 27, 2022
Summary
Researchers developed advanced porous materials from zirconium-based metal-organic frameworks (MOFs) to efficiently remove pharmaceuticals from water. These novel adsorbents demonstrate enhanced capacity and faster uptake rates, offering a promising solution for micropollutant removal.
Area of Science:
- Materials Science
- Environmental Chemistry
- Nanotechnology
Background:
- Developing effective adsorbents for pharmaceutical removal from water remains a significant challenge.
- Water-stable metal-organic frameworks (MOFs) offer potential due to high surface area and channels, but their full capacity utilization needs investigation.
Purpose of the Study:
- To design and synthesize fine-tuning hierarchically porous materials based on water-stable Zr-based MOFs.
- To enhance the adsorption capacity and uptake rate for pharmaceutical removal.
- To understand the relationship between pore structure and adsorption performance.
Main Methods:
- Construction of fifteen isostructural frameworks with finely tuned hierarchical pore structures using seven monocarboxylic modulators of varying alkyl chain lengths.
- Systematic study of adsorption performance for 17 diverse pharmaceuticals.
- Investigation of competitive adsorption in the presence of natural wastewater components like humic acid (HA), bovine serum albumin (BSA), and bovine hemoglobin (BHB).
Main Results:
- Significantly improved adsorption capacity and uptake rate for pharmaceuticals using the synthesized MOF-based materials.
- A strong correlation identified between the mesoporous proportion and trapping kinetics.
- Selective trapping of target pharmaceutical compounds via size exclusion effect in the presence of HA, BSA, and BHB.
Conclusions:
- The study provides effective MOF modification strategies for enhanced micropollutant removal from natural wastewater.
- Offers fundamental insights into porosity-performance relationships for adsorbent design.
- Demonstrates the potential of precisely engineered hierarchical porous MOFs for water purification.
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