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Use of Cocoa Podhusk (Theobroma Cacao) in the Removal of Chrome from Aquous Solutions
Uso de cáscara de cacao (Theobroma cacao) para la remocion de cromo en solución acuosa
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Use of Cocoa Podhusk (Theobroma Cacao) in the Removal of Chrome from Aquous Solutions. (2020). Revista EIA, 17(34), 1-13. https://doi.org/10.24050/reia.v17i34.1393
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Cocoa shell was used as a natural bioadsorbent to remove chromium6+ in aqueous solutions with concentrations equivalent to those generated in the tanning process. An FTIR analysis of the material before and after the adsorption process confirms the presence of functional groups (lignin, cellulose, hemicellulose), which favor the adsorption of chromium metal ions, which favor the adsorption of chromium metal ions. The effect of temperature and particle diameter on the percentage of adsorbed metal was studied. The concentration of the metal in the solution was done by atomic adsorption. A maximum adsorption capacity of 24.7% at a temperature of 28ºC and 0.8mm particle diameter. The Sips Isotherm yielded a better adjustment of the balance data. The kinetic data were adjusted, finding a higher correlation coefficient for the pseudo second order model. Chromium contaminated biomass was encapsulated by the stabilization / solidification technique for final disposal, leaching tests performed do not show detectable concentrations of the metal in the solution.
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