ESTUDO DA REMOÇÃO DE ÁCIDO 3,5-DINITROSALICÍLICO POR ADSORÇÃO UTILIZANDO ECAT-R
ESTUDO DA REMOÇÃO DE ÁCIDO 3,5-DINITROSALICÍLICO POR ADSORÇÃO UTILIZANDO ECAT-R
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DOI: https://doi.org/10.22533/at.ed.569112531039
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Palavras-chave: DNS, ecat-R, adsorção, remoção, pH.
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Keywords: DNS, ecat-R, adsorption, removal, pH
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Abstract: The increasing contamination of water bodies by harmful substances, driven by industrial, urban, and agricultural expansion, poses a serious threat to water quality and aquatic ecosystems. Among the compounds of environmental concern is 3,5-dinitrosalicylic acid (DNS), widely used in the chemical industry as an analytical and synthetic reagent. In this study, the potential of the remediated equilibrium catalyst (ECAT-R), a byproduct from Fluid Catalytic Cracking (FCC) units, was evaluated as an adsorbent for DNS removal from aqueous solutions. Batch adsorption experiments were conducted to assess the effects of adsorbate concentration, adsorbent mass, and agitation time. The influence of pH was also examined, and the point of zero charge (PZC) of ECAT-R was determined to be 7.14. Under the tested conditions, a maximum adsorption efficiency of 19.05% was achieved, indicating low chemical and physical affinity between DNS and ECAT-R. These results suggest that ECAT-R has limited potential for DNS removal but highlight the importance of exploring industrial byproducts for environmental remediation applications.
- Nicole Salvador
- Rafael Bruno Vieira
- Thamayne Valadares de Oliveira