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Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples
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Adsorption of ionic contaminants from complex water matrices by versatile chitosan-based beads
Chaofan Zheng1, Kuiyuan Sun1, Qu Wu1
1College of Urban Construction, Nanjing Tech University, Nanjing 211816, China.
Bioresource Technology
|August 24, 2024
Summary
A novel chitosan-based adsorbent (MC-DA) effectively removes diverse ionic pollutants from wastewater. This pH-responsive material shows high capacity and reusability for environmental remediation.
Area of Science:
- Materials Science
- Environmental Science
- Chemistry
Background:
- Conventional adsorbents often have single functions, limiting their use in complex wastewater treatment.
- Developing versatile adsorbents is crucial for efficient pollutant removal.
Purpose of the Study:
- To construct a pH-responsive, versatile chitosan-based adsorbent (MC-DA) for removing multiple ionic contaminants.
- To investigate the adsorption performance and mechanisms of MC-DA for methylene blue (MB) and Acid Orange 7 (AO7).
Main Methods:
- Grafting amphoteric copolymers onto chitosan to create the MC-DA adsorbent.
- Characterizing MC-DA's pH-responsive surface charge and hydrophobicity/hydrophilicity.
- Evaluating adsorption capacities and mechanisms for cationic (MB) and anionic (AO7) dyes.
Main Results:
- MC-DA exhibited high adsorption capacities: 627.4 mg/g for MB and 1146.8 mg/g for AO7.
- Adsorption mechanisms involved electrostatic and hydrophobic interactions for MB, and electrostatic attraction for AO7.
- The adsorbent demonstrated excellent acid resistance (pH ≥ 2.0), reusability, and magnetic separation.
Conclusions:
- MC-DA is a highly effective and versatile adsorbent for multiple ionic contaminants.
- Its tunable properties and robust performance indicate significant potential for practical water remediation applications.
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