TY - GEN
T1 - Geopolymeric filter based on metakaolin and rice husk ash for removal of chromium ions
AU - Alvarado, Cinthya
AU - Cavero, María Susana
AU - Alvarado-Quintana, Hernán
N1 - Publisher Copyright:
© 2022 Latin American and Caribbean Consortium of Engineering Institutions. All rights reserved.
PY - 2022
Y1 - 2022
N2 - The objective of this research was to determine the influence of the percentage of rice husk ash (CCA) and the concentration of the alkaline activator on the removal of chromium ions from geopolymer filters based on metakaolin (MK), due to the high toxicity generated by the chromium on health and the environment. The geopolymer was prepared by mixing activated rice husk ash at different percentages (0%, 10%, 20%, 30%) with kaolin at different molarities of sodium hydroxide (10M, 12M, 14M); subsequently, spheres of 4 mm in diameter were formed; was placed in the oven at a temperature of 110°C for 24 hours after 1 day of cooling, the same samples were placed in the oven at a temperature of 900°C for a time of half an hour to achieve sintering of the geopolymer. The results obtained through the adsorption process indicate that the highest percentage of chromium (VI) removal is achieved when the geopolymer is made up of metakaolin with 30% rice husk ash with an alkaline activator concentration (NaOH) of 14M with a time of 3 hours, being 54.42% the percentage of Remo val of chromium VI ions. This study concludes that the higher the percentage of CCA and the higher the molarity of the alkaline activator (NaOH), the higher the percentage of removal of chromium ions.
AB - The objective of this research was to determine the influence of the percentage of rice husk ash (CCA) and the concentration of the alkaline activator on the removal of chromium ions from geopolymer filters based on metakaolin (MK), due to the high toxicity generated by the chromium on health and the environment. The geopolymer was prepared by mixing activated rice husk ash at different percentages (0%, 10%, 20%, 30%) with kaolin at different molarities of sodium hydroxide (10M, 12M, 14M); subsequently, spheres of 4 mm in diameter were formed; was placed in the oven at a temperature of 110°C for 24 hours after 1 day of cooling, the same samples were placed in the oven at a temperature of 900°C for a time of half an hour to achieve sintering of the geopolymer. The results obtained through the adsorption process indicate that the highest percentage of chromium (VI) removal is achieved when the geopolymer is made up of metakaolin with 30% rice husk ash with an alkaline activator concentration (NaOH) of 14M with a time of 3 hours, being 54.42% the percentage of Remo val of chromium VI ions. This study concludes that the higher the percentage of CCA and the higher the molarity of the alkaline activator (NaOH), the higher the percentage of removal of chromium ions.
KW - adsorption
KW - chromium
KW - geopolymer
KW - metakaolin
UR - https://www.scopus.com/pages/publications/85140013439
U2 - 10.18687/LACCEI2022.1.1.620
DO - 10.18687/LACCEI2022.1.1.620
M3 - Conference contribution
AN - SCOPUS:85140013439
T3 - Proceedings of the LACCEI international Multi-conference for Engineering, Education and Technology
BT - 20th LACCEI International Multi-Conference for Engineering, Education Caribbean Conference for Engineering and Technology
A2 - Larrondo Petrie, Maria M.
A2 - Texier, Jose
A2 - Pena, Andrea
A2 - Viloria, Jose Angel Sanchez
T2 - 20th LACCEI International Multi-Conference for Engineering, Education Caribbean Conference for Engineering and Technology, LACCEI 2022
Y2 - 18 July 2022 through 22 July 2022
ER -