Efficient Removal
of Copper(II) From Aqueous Solutions Using Polypyrrole Based Magnetic Nano-Adsorbent
Srivastava A., Srivastava N. and Singh R.
Res. J. Chem. Environ.; Vol. 29(12); 104-112;
doi: https://doi.org/10.25303/2912rjce1040112; (2025)
Abstract
Water contamination constitutes a substantial global issue that affects the environment.
The discharge of manufacturing waste substantially contributes to this issue. Adsorption
materials have demonstrated huge potential in wastewater treatment for the efficient
removal of Cu(II). 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, further supported by XRD data. The adsorption system adhered to a
pseudo-second-order kinetic model with the equilibrium time being determined at
210 minutes. The Langmuir model accurately simulated the adsorption isotherms.
Under optimal conditions (pH - 6.0, volume - 40 ml, adsorbent dose – 40.0 mg and
at 303 K temperature), the maximum monolayer adsorption capacity of PPy/CoFe2O4
is 199.6 mg g⁻1. Negative ΔG° and ΔH° indicate spontaneous Cu(II) 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 heavy metal ions.
