Magnetic Nanofibers in Heavy Metal Arsenic(V) Pollution Control Research

Area of Science:

• Materials Science
• Environmental Science
• Nanotechnology

Background:

• Arsenic contamination in water poses a significant environmental and health risk.
• Effective and regenerable adsorbents are crucial for arsenic remediation.

Purpose of the Study:

• To synthesize and characterize PAN/Fe3O4@CTAB magnetic nanofibers for As(V) removal.
• To evaluate the adsorption performance, kinetics, and isotherm models for arsenic removal.
• To optimize adsorption conditions using response surface methodology.

Main Methods:

• Electrospinning was used to prepare PAN/Fe3O4@CTAB magnetic nanofibers.
• Material characterization included XRD, FTIR, SEM, VSM, and TG.
• Batch adsorption experiments and response surface methodology (RSM) were employed.

Main Results:

• The synthesized nanofibers exhibited a high maximum adsorption capacity of 138.66 mg/g for As(V).
• Adsorption followed pseudo-second-order kinetics and Langmuir isotherm models.
• Optimal adsorption conditions achieved a 98.62% arsenic removal rate, with 91% efficiency maintained after five regeneration cycles.

Conclusions:

• PAN/Fe3O4@CTAB magnetic nanofibers are highly effective for arsenic removal from aqueous solutions.
• The material demonstrates excellent adsorption capacity, regeneration capability, and stability.
• This adsorbent shows great potential for practical water treatment applications.