Journal
DESALINATION AND WATER TREATMENT
Volume 209, Issue -, Pages 392-401Publisher
DESALINATION PUBL
DOI: 10.5004/dwt.2021.26536
Keywords
Malachite green dye; CNT-ABS nanocomposite; SEM; TEM; XRD; Adsorption
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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.
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.
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