Potencial de resíduo não processado proveniente da obtenção do silício metálico como adsorvente do corante vermelho de metila

Materia

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Cristian Santos Nunes¹  Andreza de Souza Castillo¹  Jaqueline Pinheiro Ramos²  Laércio Gouvêa Gomes²  Fábio José Bonfim Cardoso¹  Karyme do Socorro de Souza Vilhena¹ 

[1] Universidade Federal do Pará, Laboratório de Química Multidisciplinar;Instituto Federal de Educação

关键词: Adsorption mechanism;    Methyl red;    Kinetic;    Isotherms;   

DOI  :  10.1590/1517-7076-RMAT-2023-0018

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

Industrial effluents containing organic contaminants and inorganics are discharged into water sources, causing damage to aquatic organisms and, consequently, serious diseases to humans. In this research we investigated the adsorption capacity against methyl red dye nitrogen (adsorbent) by the industrial residue (adsorbent) from the manufacture of silicon metal, the results were adjusted to the adsorption isotherm models. The granulometric, morphological and chemical characterization of the material was performed. Techniques such as SEM-EDS and ICP-OES were used. For the residue, the zero load point (pHPCZ), influence of pH and agitation velocity on the adsorption capacity were measured. The characteristics of the adsorption equilibrium were determined by applying the Freundlich, Tempkin and Dubinin-Radushkevich linear adsorption isotherms, while the kinetic processes were availed using the linear models of pseudo-first order, pseudo-second order, Elovich and intraparticle diffusion. The pseudo-second order model, with R2 equal to 1,0000 and Q2 of 0,9999, was the best fit to the adsorption kinetic condition and Temkin model, whose R2 and Q2 values were 0,9008 and 0,7929, respectively, was the one that best represented the equilibrium observed. The adsorption process was characterized as being favorable and the results indicated that the residue has potential to be used as an absorbent for methyl red dye.

【 授权许可】

CC BY