Adsorption of naphthenic acid using activated carbon from Orbignya phalerata shell

Acta Brasiliensis

View Publication Info
 
 
Field Value
 
Title Adsorption of naphthenic acid using activated carbon from Orbignya phalerata shell

Adsorção de ácido naftênico pelo carvão ativado de casca de Orbignya phalerata
 
Creator Ferreira, Maria Eugênia de Oliveira
Mônaco, Felipe Santos
Ostroski, Indianara Conceição
 
Description The petrochemical industry involves a process chain with great potential for pollution. The presence of naphthenic acids in oily wastewater causes environmental damage, harming various organisms. The objective of this study was to evaluate the adsorptive capacity of activated carbon derived from Orbignya phalerata (babaçu coconut) shells for the removal of a model naphthenic acid, 1,4-cyclohexanedicarboxylic acid. To do this, kinetics and adsorption isotherms were determined in a batch system. Acid adsorption kinetics in the adsorbent were relatively fast, reaching equilibrium after 60 minutes of contact. Kinetic data was better adjusted to the pseudo-second order model, revealing the chemisorption character of the contaminant adsorption process. Equilibrium data was adjusted according to the Langmuir and Freundlich models, and both presented good fit. Based on the equilibrium constant analysis, activated carbon has higher affinity as an adsorbate and the maximum retained amount of acid obtained experimentally was 417.0 mg g-1. Thus, the equilibrium data obtained for the system suggest that the adsorbent tested has promising outcomes in the removal of acid contaminants present in wastewater from oil refining processes.
A indústria petroquímica envolve uma cadeia de processos com alto potencial poluidor. A presença de ácidos naftênicos em águas residuais oleosas causam danos ambientais, prejudicando diversos organismos. Esta pesquisa avaliou a capacidade adsortiva do carvão ativado de casca de Orbignya phalerata (coco babaçu), para a remoção de um ácido naftênico modelo, o ácido 1,4-ciclohexanodicarboxílico. Para tanto, foram determinadas as cinéticas e as isotermas de adsorção, em sistema batelada. A cinética de adsorção do ácido no adsorvente foi relativamente rápida, alcançando o equilíbrio com 60 minutos de contato. Os dados cinéticos foram melhor ajustados ao modelo de pseudo-segunda ordem, revelando o caráter quimiossortivo do processo de adsorção do contaminante. Os dados de equilíbrio apresentaram bom ajuste aos modelos de Langmuir e Freundlich. A partir da análise da constante de equilíbrio, o carvão ativado apresenta maior afinidade pelo adsorvato e a quantidade máxima retida de ácido foi de 417,0 mg g-1. Assim, os dados de equilíbrio obtidos para o sistema sugerem a sua indicação para o uso do adsorvente como promissor na remoção do contaminante ácido presente em águas residuais dos processos petroquímicos.  
 
Publisher Universidade Federal de Campina Grande - UFCG
 
Date 2020-09-28
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
 
Format application/pdf
 
Identifier http://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/279
10.22571/2526-4338279
 
Source Acta Brasiliensis; Vol 4 No 3 (2020): Acta Brasiliensis; 173-177
Acta Brasiliensis; Vol 4 No 3 (2020): Acta Brasiliensis; 173-177
Acta Brasiliensis; Vol 4 No 3 (2020): Acta Brasiliensis; 173-177
2526-4338
2526-432X
 
Language por
 
Relation http://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/279/109
 
Rights Copyright (c) 2019 Acta Brasiliensis
 

Contact Us

The PKP Index is an initiative of the Public Knowledge Project.

For PKP Publishing Services please use the PKP|PS contact form.

For support with PKP software we encourage users to consult our wiki for documentation and search our support forums.

For any other correspondence feel free to contact us using the PKP contact form.

Find Us

Twitter

Copyright © 2015-2018 Simon Fraser University Library