Adsorptive Removal of Diuron Herbicide on Carbon Nanotubes Synthesized from Plastic Waste

Adsorptive Removal of Diuron Herbicide on Carbon Nanotubes Synthesized from Plastic Waste

In this study, carbon nanotubes (CNTs) were synthesized from waste polyethylene bottles and their use as an adsorbent for the removal of diuron herbicide from aqueous solution was evaluated. Batch adsorption was performed by varying adsorbent dosage, initial concentration, contact time, and temperat...

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Bibliographic Details
Published in:Journal of polymers and the environment Vol. 25; no. 2; pp. 165 - 175
Main Authors: Deokar, Sunil K., Bajad, Ganesh S., Bhonde, Payal, Vijayakumar, R. P., Mandavgane, Sachin A.
Format: Journal Article
Language:English
Published: New York Springer US 01-06-2017
Springer Nature B.V
Subjects:
Adsorbents
Adsorption
Adsorptivity
Aqueous solutions
Carbon
Carbon nanotubes
Chemistry
Chemistry and Materials Science
Diuron
Environmental Chemistry
Environmental Engineering/Biotechnology
Herbicides
Industrial Chemistry/Chemical Engineering
Isotherms
Materials Science
Nanotechnology
Nanotubes
Original Paper
Plastic debris
Polyethylene
Polyethylenes
Polymer Sciences
Synthesis
Adsorption
Carbon nanotubes
Diuron
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Summary:In this study, carbon nanotubes (CNTs) were synthesized from waste polyethylene bottles and their use as an adsorbent for the removal of diuron herbicide from aqueous solution was evaluated. Batch adsorption was performed by varying adsorbent dosage, initial concentration, contact time, and temperature. Kinetic models applied to experimental data indicated that the pseudo-second-order model had the best fit. The equilibrium data were analyzed using different isotherm models. The adsorption capacity of CNTs for diuron removal, determined using the Hill isotherm, was approximately 40.37 mg/g at 303 K. From thermodynamic studies, the values of ΔH° (kJ/mol) and ΔS° [kJ/(mol K)] were calculated as −17.307 and −0.0528, respectively, which suggested that the adsorption process was exothermic. The negative values of ΔG° at three different temperatures indicated that adsorption of diuron on CNTs was favorable.
ISSN:1566-2543
1572-8919
1572-8900
DOI:10.1007/s10924-016-0794-3