2 research outputs found
Recovery of Total Chromium from Tannery Wastewater by Carbonization Application
A carbonization process was carried out for the recovery of chromium from wastewater by chemical treatment with sodium hydroxide as a basic solution in contact with the precursor material at different concentrations [1:0.15 (%w/w) - 1:0.20 (%w/w)]. The physical treatment was carried out with carbonization at 700鈭楥 for a period of 2 hours. The obtained samples were characterized by elemental analysis, thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), atomic absorption spectroscopy, and surface area analysis (BET) to validate the evidence of metal recovery. The results indicate that the percentage of total chromium recovery was 47.62% with respect to the uncarbonized material, establishing that the best carbonization variables are at 700鈭楥 and concentration 1:0.20% w/w for 2 hours.
Keywords: tannery industry, carbonization, recovery, total chromium.
Resumen
Se realiz贸 un proceso de carbonizaci贸n para la recuperaci贸n de cromo a partir de aguas residuales mediante un tratamiento qu铆mico con hidr贸xido de sodio como soluci贸n b谩sica en contacto con el material precursor a diferentes concentraciones [1:0,15 (%p/p)- 1:0,20 (%p/p)], el tratamiento f铆sico se realiz贸 con la carbonizaci贸n a 700鈭楥 por un lapso de 2 horas. Las muestras obtenidas se caracterizaron mediante an谩lisis elemental, an谩lisis termogravim茅trico (TGA), espectroscopia infrarroja por transformada de Fourier (FT-IR), espectroscopia de absorci贸n at贸mica y an谩lisis de 谩rea superficial (BET) para validar la evidencia de la recuperaci贸n del metal. Los resultados indican que el porcentaje de recuperaci贸n de cromo total es de 47,62% respecto del material sin carbonizar estableciendo que las mejores variables de carbonizaci贸n son 700 鈭楥 y concentraci贸n 1:0.20 %p/p por 2 horas.
Palabras Clave: Industria curtiembre, carbonizaci贸n, recuperaci贸n, cromo total
Recovery of Total Chromium from Tannery Wastewater by Carbonization Application
A carbonization process was carried out for the recovery of chromium from wastewater by
chemical treatment with sodium hydroxide as a basic solution in contact with the precursor
material at different concentrations [1:0.15 (%w/w) - 1:0.20 (%w/w)]. The physical treatment
was carried out with carbonization at 700鈼婥 for a period of 2 hours. The obtained samples
were characterized by elemental analysis, thermogravimetric analysis (TGA), Fourier transform
infrared spectroscopy (FT-IR), atomic absorption spectroscopy, and surface area analysis (BET)
to validate the evidence of metal recovery. The results indicate that the percentage of total
chromium recovery was 47.62% with respect to the uncarbonized material, establishing that
the best carbonization variables are at 700鈼婥 and concentration 1:0.20% w/w for 2 hours