Equilibrium and kinetic modelling of triclosan adsorption on Single-Walled Carbon Nanotubes

In this work, Simple Walled Carbon Nanotubes (SWCNTs) were used as adsorbents to remove triclosan (TCS) from aqueous solution. The material characterization consisted of SEM/EDS and TEM/EDS analysis, surface characterization, and the determination of the pH at the point of zero charge. The effect of solution pH on the adsorption equilibrium was investigated in batch experiments. The overall adsorption rate of TCS on SWCNTs was investigated by applying kinetic models and a diffusional model based on pore volume diffusion. The results showed that a maximum adsorption capacity of TCS onto SWCNTs is obtained at a pH value of 7, which is 30.3 mg g−1. The adsorption kinetics of TCS on SWCNTs was interpreted correctly by the First Order Kinetic Model and the Diffusional Model. The values of Dep varied from 1.06 to 1.20 × 10−8 cm2 s−1 and increased discretely as the mass of TCS adsorbed at equilibrium increased. © 2021 Elsevier Ltd

Batch experiments; Carbon nanotubes; Diffusional model; Emerging pollutants; SWCNTs Adsorption; Kinetic parameters; Single-walled carbon nanotubes (SWCN); Batch experiments; Diffusional models; Emerging pollutants; Equilibrium and kinetic modeling; Materials characterization; SEM-EDS; Simple walled carbon nanotube; Simple ; Single-walled carbon; Triclosan; Kinetic theory
Batch experiments; Carbon nanotubes; Diffusional model; Emerging pollutants; SWCNTs Adsorption; Kinetic parameters; Single-walled carbon nanotubes (SWCN); Batch experiments; Diffusional models; Emerging pollutants; Equilibrium and kinetic modeling; Materials characterization; SEM-EDS; Simple walled carbon nanotube; Simple++; Single-walled carbon; Triclosan; Kinetic theory

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