Abstract

Pharmaceutical drug contamination in water nowadays is deteriorating the ecological components. A remedial approach is therefore a necessity. This study focuses on the synthesis of PANI nanofibres employing the oxidative polymerization method using ammonium persulphate (APS) as oxidant. The synthesized nanofibres were characterized using HR-TEM, FT-IR and XRD. The HRTEM image exhibited the nano-range structure of PANI with a rough surface. The FT-IR spectra inferred about the role of surface capping groups involved in the uptake mechanism. The crystallinity of PANI was well assessed by the X-Ray Diffraction analysis. The interaction between the studied drug diclofenac (DC) and polyaniline (PANI) showed a rapid equilibrium time 120 min favored at pH 5.0 achieving maximum adsorptive capacity (qe) of 471.08 mg g −1. The uptake process followed the pseudo-second order kinetic model (R2 = 1) with intra-particle diffusivity model (R2 = 0.9810) as the governing step and best fitting values into Langmuir isotherm model (R2 = 0.9822) inferred about the favourable adsorption of DC forming monolayer over PANI having qm to be 943.83 mg g−1. The drug DC was easily desorbed up to 85.31% by using 0.1 M aq ethanol and was exhausted after five cycles of reusability. The whole adsorptive mechanism involved electrostatic interactions along with hydrogen bonding.

Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call