DEVELOPMENT OF A METHOD TO EVALUATE THE EFFICIENCY OF NANOSCALE ZERO-VALENT IRON (NZVI) TO DEGRADE  POLLUTANTS

Giovana Arrighi Ferrari; Felipe Santana de Oliveira Cruz; Renata Pereira Lopes Moreira; Gustavo Alves Puiatti; Luiza Dumont de Miranda Moraes; André Fernando Oliveira

doi:10.18540/jcecvl5iss3pp0299-0307f

Auteurs

Giovana Arrighi Ferrari Universidade Federal de Viçosa
Felipe Santana de Oliveira Cruz Universidade Federal de Viçosa
Renata Pereira Lopes Moreira Universidade Federal de Viçosa https://orcid.org/0000-0003-1049-8300
Gustavo Alves Puiatti Universidade Federal de Viçosa
Luiza Dumont de Miranda Moraes Universidade Federal de Viçosa
André Fernando Oliveira Universidade Federal de Viçosa

DOI :

https://doi.org/10.18540/jcecvl5iss3pp0299-0307f

Mots-clés :

Zero-valent iron, Optimization, Removal efficiency, Method validation.

Résumé

Iron nanoparticles (nZVI) stand out in environmental remediation due to their high reactivity. However, they have low chemical stability when exposed to oxygen and water, reducing their effectiveness. The objective of this work was to develop and validate a method to evaluate the efficiency of nZVI from synthetic lots L01 and L02, from the degradation of dyes, orange and methyl violet (MO and MV). The previous degradation tests provided the best results for MO (~100% degradation, 12 min reaction, 0.5 g L^-1 dose). The optimization using Factorial Planning obtained the optimal condition, C_MO = 5.98 mol L^-1 and D_nZVI = 0.56 g L^-1. The Boltzmann model fitted the results obtained (R² = 0.993). Finally, a mathematical relationship was obtained that provided equivalent doses of L01 and L02 in relation to the Standard. The applied mathematical adjustments presented R²> 0.99 and errors <4%.

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Biographie de l'auteur

Renata Pereira Lopes Moreira, Universidade Federal de Viçosa

Departamento de Química, Química Analítica.

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