| Title | Bentonite and carbon nanotube adsorbents for the removal of bisphenol A from water |
|---|---|
| ID_Doc | 64738 |
| Authors | Salam, NFA; Kaminska, G; Marszalek, A |
| Title | Bentonite and carbon nanotube adsorbents for the removal of bisphenol A from water |
| Year | 2022 |
| Published | |
| Abstract | The present study investigates the adsorption of bisphenol A (BPA), a well-known endocrine disruptor and widespread pollutant in the aquatic environment, using bentonite clay (Ben) and bentonite-carbon nanotubes composite (Ben-CNT) as adsorbents. In the study of adsorption isotherms, the initial concentrations of BPA in water were 1 and 2 mg/L, while for the kinetic study it was 1 mg/L. The kinetics data correlated well to a pseudo-second-order reaction, with Ben and Ben-CNT reaching equilibrium in around 60 and 180 min, respectively. Isothermal data fitted well to Freundlich and Dubinin-Radushkevich models, while the Langmuir model did not provide suitable fitting. The resulting adsorption capacity was about 1.56 and 29.61 mg/g for bentonite and bentonite-carbon nanotubes composite, respectively. The removal percentage of BPA was improved from about 24% for bentonite clay to 87% for bentonite-carbon nanotubes composite for adsorbents dose of 0.25 g/100 mL. This improvement was due to the large specific surface area of carbon nanotubes and the availability of large number of active groups for binding pollutants. |
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