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Author Spotlight: Characterizing Porous Materials for Aiding the Development of Robust Metal-Organic Frameworks with Adsorption Behavior
Published on: March 8, 2024
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Highly Efficient and Selective Capture of Pb(II) through Lignin-Decorated Metal Organic Frameworks
Die Ran1, Cuiping Mao2, Guanghui Zhu1
1Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Engineering Technology Research Center of Agricultural and Forestry Biomass, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture and Rural Affairs, College of Future Biomass, South China Agricultural University, Guangzhou 510642, PR China.
Langmuir : the ACS Journal of Surfaces and Colloids
|February 2, 2026
Summary
A novel lignin-based composite, AL@Fe-BTC, efficiently removes lead ions from water. This bio-based material shows excellent adsorption capacity and selectivity, offering a green solution for heavy metal removal.
Area of Science:
- Materials Science
- Environmental Science
- Chemistry
Background:
- Heavy metal contamination poses significant environmental and health risks.
- Metal-organic frameworks (MOFs) show promise for heavy metal remediation.
- Developing sustainable and efficient adsorbents is crucial for wastewater treatment.
Purpose of the Study:
- To synthesize and characterize a novel bio-based composite material for heavy metal ion removal.
- To investigate the adsorption performance and mechanism of the composite for lead ions (Pb(II)).
- To evaluate the material's efficiency, selectivity, and reusability in simulated wastewater.
Main Methods:
- One-pot synthesis of AL@Fe-BTC by in situ growth of Fe-BTC on lignin.
- Batch adsorption experiments to determine optimal conditions (pH, concentration, dosage, time).
- Adsorption kinetics, isotherms, and thermodynamics studies.
- Evaluation of selectivity and reusability in the presence of interfering ions.
Main Results:
- AL@Fe-BTC demonstrated a high adsorption capacity of 144.1 mg/g for Pb(II) under optimal conditions (pH 6.0, 400 mg/L initial concentration, 0.4 g/L dosage, 360 min).
- Adsorption followed pseudo-second-order kinetics and Freundlich isotherm models, indicating chemisorption.
- The process was spontaneous and endothermic.
- The composite exhibited excellent selectivity for Pb(II) over other metal ions and maintained high capacity after four cycles.
Conclusions:
- AL@Fe-BTC is a highly efficient, selective, and reusable adsorbent for Pb(II) removal from aqueous solutions.
- The adsorption mechanism involves chelation and ion-exchange interactions.
- This study presents a green and simple method for preparing bio-based MOF composites for heavy metal remediation.
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