Title:
Adsorption of Chrome VI in Curtiembres Wastewater Using Calcined Eggshell
Author(s):
Vivas-Cuellar, M.C., Collado Dominguez, E.A., Arias Durand, A.D., Guillén De La Cruz, R., Marin-Flores, O.G.
Document(s):
Paper
Poster
Abstract:
In order to contribute to a circular economy, the main objective of this research work is to test the use of calcined eggshell as an adsorbent substrate for the removal of Chromium VI from wastewater from the tannery industry. The eggshell residue was calcined in order to increase its surface area, for this purpose the eggshell was crushed to a particle size of less than 0.149mm, in a muffle at 800 ° C for a time of 2 hours. Then the calcined eggshell was put in contact with a solution that initially contained a high percentage of chromium VI from a local tannery in the city of Lima, the tests were carried out in a discontinuous process and with constant stirring, with the purpose of determining the factors that affect the adsorption of chromium VI, which were: weight of calcined eggshell of 20 gr/L, 35 gr/L and 50 gr/L; substrate/solution contact time 30min, 60min and 90min and finally initial concentration of chromium VI in the effluent of 202ppm and 405ppm. For the determination of the final concentration of chromium VI after concluding with the adsorption time, the Standard method for the determination of hexavalent chromium in water (SM 3500 - Cr. B) was used, and for the measurement of the absorbance a UV/Vis 2800 spectrophotometer. After concluding with all the runs and carrying out their respective absorbance measurement at a wavelength of 540nm, a maximum adsorption percentage of 85.80% and 95.39% was obtained for an initial concentration of 202ppm and 405ppm respectively. in a time of 90 min in both cases, with which it can be stated that the calcined eggshell residue has a high chromium VI adsorption capacity in aqueous solutions.
Keywords:
absorption, calcined eggshell, chromium VI
Topic:
Biomass Conversion to Bio-Based Products and Chemicals
Subtopic:
Processes for bio-based chemicals and materials
Event:
30th European Biomass Conference and Exhibition
Session:
6AV.6.4
Pages:
1052 - 1055
ISBN:
978-88-89407-22-6
Paper DOI:
10.5071/30thEUBCE2022-6AV.6.4
Price:
FREE
