1. Transforming shrub waste into a high-efficiency adsorbent: Application of Physalis peruvian chalice treated with strong acid to remove the 2,4-dichlorophenoxyacetic acid herbicide.
- Author
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Georgin, Jordana, Franco, Dison S.P., Schadeck Netto, Matias, Allasia, Daniel, Foletto, Edson Luiz, Oliveira, Luis F.S., and Dotto, Guilherme Luiz
- Subjects
CAPE gooseberry ,HERBICIDES ,PHYSALIS ,STATISTICAL physics ,SULFURIC acid - Abstract
• A novel adsorbent from Physalis peruviana chalice was developed. • The adsorbent was able to a successful adsorb 2,4-D. • Statistical physics models indicate that adsorption occurs due to physisorption. In this study, the chalice generated from the production of the Physalis peruviana fruit was subjected to a treatment with sulfuric acid and applied in the adsorption of 2,4-Dichlorophenoxyacetic acid (2,4-D). The precursor, and the treated material before and after the adsorption, were analyzed by different techniques. After the acid treatment, it was found that the surface was changed from a smooth to an irregular surface with the presence of cavities with irregular size. The adsorption was favored at pH = 2 and with a dosage of 0.8 g L
−1 . The pseudo-second-order model was the best to represent kinetic data. The isothermal experiments were well represented by the Langmuir and Tóth models, reaching a high capacity of 244 and 320 mg g−1 , respectively. The computed thermodynamic values show that the 2,4-D adsorption was spontaneous and exothermic. Overall, this study indicates that the Physalis peruviana chalice treated with strong acid presents great potential as an alternative material for the adsorption/removal of 2,4-D herbicide from liquid effluents. [ABSTRACT FROM AUTHOR]- Published
- 2021
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