Abstract
ABSTRACTWater contamination constitutes a substantial global issue that affects the environment. Adsorption materials have demonstrated huge potential in wastewater treatment. For the efficient removal of a cationic dye, basic blue 3 (BB3), a polypyrrole‐coated cobalt ferrite (PPy@CoFe2O4) magnetic nanosorbent is prepared via in situ polymerization of pyrrole on CoFe2O4 nanoparticles. Scanning electron microscopy (SEM) analysis demonstrated spherical nanoparticles with sizes around 50 nm, which was further supported by XRD data. Zeta‐potential study showed that the surface charge of PPy@CoFe2O4 is negative in alkaline media and positive in acidic media. The adsorption system adhered to a pseudo‐second‐order kinetic model, with the equilibrium time being determined at 50 min. The Langmuir model accurately simulated the adsorption isotherms. Under optimal conditions (pH—8.0, volume—30 mL, adsorbent dose—0.67 g/L, and at 303 K temperature), the maximum monolayer adsorption capacity of PPy/CoFe2O4 is 130.1 mg g−1. Even after five desorption–adsorption cycles, the removal efficiency remained above 92%. Negative ΔG° and ΔH° indicate spontaneous BB3 adsorption onto PPy/CoFe2O4, decreasing with temperature. These findings demonstrate that the PPy/CoFe2O4 composite is a highly effective adsorbent with broad potential applications for treating wastewater containing cationic dye.
Published Version
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