Comparative adsorptive and kinetic study on the removal of Malachite Green in aqueous solution using titanium coated graphite and titanium coated graphite with CNT-ABS nanocomposite

The titanium was coated on graphite using the electroless method. The titanium coated graphite nanoparticle was modified with CNT-ABS nanocomposite by a sequence of steps, that is, sensitizing, activating, and coating with prior cleaning step. The titanium coated graphite with and without CNT-ABS nanocomposite was characterized by using X-ray diffraction, Fourier transform infra-red spectroscopy, scanning electron microscopy, and transmission electron microscopy. The dye absorption efficiency is checked with and without nanocomposite of CNT-ABS. Malachite green dye was used as organic toxic waste. It was observed that Malachite green dye absorption efficiency of titanium coated graphite with CNT-ABS composite was better than without. The effect of adsorbent dosage ( 0.6 g/L), initial dye concentration (10 mg/L), pH (6), and contact time (60 min) was evaluated. The equilibrium concentration and the adsorption capacity were evaluated using three different models namely Langmuir, Freundlich, and Tempkin isotherms. The kinetic study determined that Malachite green dye adsorption was in good analogy with the pseudo-first-order kinetic model.

Automated summary

The study showed that the absorption efficiency of Malachite green dye by the titanium coated graphite modified with CNT-ABS nanocomposite was better than the unmodified version, with adsorption following a pseudo-first-order kinetic model.