Open AccessAdsorption of remazol golden yellow dye from aqueous solution by acerola core: kinetic and equilibrium studies
Author(s) -
Ana Barbosa,
Marina Gomes Silva,
Ingrid Larissa da Silva Santana,
Ramon Vinícius Santos de Aquino,
Naiana Santos da Cruz Santaeves,
Isis Henriqueta dos Reis Ferreira,
Otidene Rossiter Sá da Rocha
Publication year - 2022
Publication title -
ciência e natura
Language(s) - English
Resource type - Journals
eISSN - 2179-460X
pISSN - 0100-8307
DOI - 10.5902/2179460x64900
Subject(s) - adsorption , point of zero charge , chemistry , fourier transform infrared spectroscopy , langmuir , activated charcoal , langmuir adsorption model , aqueous solution , nuclear chemistry , chromatography , organic chemistry , chemical engineering , engineering
This work was conducted to evaluate the efficiency of the acerola (Malpighia emarginata) core as adsorbent (ACB) and as a precursor of adsorbent charcoal (CAB) and activated charcoal (ACP), to remove the textile dye remazol golden yellow (RGY) in solution. The adsorbents characterization was obtained by Fourier-transform infrared spectroscopy, thermogravimetric analysis (TG) and determination of the specific area and the point of zero charge (pHpzc). The best conditions for adsorption for this adsorbent was reached through adsorbent mass studies and kinetic and equilibrium assays. The adsorption capacity q (mg.g-1) was used to analyze the effects. The pHpzc were 4.15 for ACB, 6.00 for CAB and 4.32 for ACP, demonstrating superficial charge favorable to dye adsorption. Considering the kinetic aspects, the pseudo-first order model adjusted more satisfactorily to experimental data. Related to isotherms, Langmuir was more efficient to represent experimental data of dye adsorption. ACB, CAB and ACP are potential adsorbents for dyes in effluents, presenting maximum adsorption capacity, in the study conditions, of 52.35 mg.g-1, 16.40 mg.g-1, and 119.00 mg.g-1, respectively.