Application of CNT-COOH/MnO2/Fe3O4 Nanocomposite for the Removal of Cymoxanil from Aqueous Solution: Isotherm and Kinetic Studies.

The present study reports the cymoxanil adsorption efficiency on carboxy-carbon nanotubes (CNT-COOH)/manganese(IV) oxide (MnO₂)/iron(II,III) oxide(Fe₃O₄) nanocomposite. The optimum conditions were determined by studying the influence of pH (2-10), temperature (20-60 °C), initial cymoxanil concentration (7-20 mg L⁻¹), adsorbent dose (0.5-5 g L⁻¹) and contact time (2-30 min) on the adsorption process. The isotherm and kinetic models were used to analyze the experimental data. The Langmuir isotherm model was shown to provide the best fit with a 10.672 mg g⁻¹ maximum adsorption capacity. Also, the cymoxanil adsorption follows the pseudo-second order kinetic model. According to these results, the CNT-COOH/MnO₂/Fe₃O₄ nanocomposite may be used for cymoxanil removal from aqueous solution. [ABSTRACT FROM AUTHOR]