Resumo

CAICEDO-ORJUELA, OBRADITH,; MAHECHA-PEREZ,, JUAN ANDRÉS  e  NAVARRETE-RODRIGUEZ, LUISA FERNANDA. Removal of total phenolic compounds from coffee processing waters on a matrix of natural origin. Rev.Bio.Agro [online]. 2022, vol.20, n.2, pp.18-28.  Epub 01-Jul-2022. ISSN 1692-3561.  https://doi.org/10.18684/rbsaa.v20.n2.2022.1616.

The use of different materials for the adsorption of different types of molecules is well known. However, currently there is a need to use materials of natural origin given their composition, porosity and characteristics such as being renewable, economical and friendly to the environment for the retention of contaminants such as phenols. The objective of this study was to reduce the content of phenolic compounds in wastewater from coffee processing wastewater. To achieve this, the percentage of retention of the phenolic compounds was evaluated on the vegetable sponge, Luffa cylindrica as adsorbent material. The influence of pH, particle size and contact time under experimental design was evaluated in a 23 model. A total phenol retention percentage of 97,8 % at pH 7,0 particle size 850μm and 2 h exposure was achieved. The kinetic behaviour corresponds to a pseudo second order model, and the adsorption of the phenolic compounds-Luffa cylindrica is represented by the Freundlich isotherm. Additionally, it was possible to reduce the value of other pollution parameters such as COD andturbidity. Therefore, treatment with Luffa cylindrica is a valuable alternative for the treatment of water from the processing of coffee

Palavras-chave : Chemical Kinetics; Water Treatment; Environmental Chemistry; Vegetable Sponge; Phenolic Compounds; Luffa cylindrica.

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