| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alumina and Bauxite
|
| Presentation Title |
Bayer Process Towards the Circular Economy – Soil Conditioners from Bauxite Residue |
| Author(s) |
Roseanne Barata Holanda , Patrícia Magalhães Pereira Silva, Andre Luiz Vilaça do Carmo, Alice Ferreira Cardoso, Adriano Lucheta, Raphael Vieira da Costa, Caio Cesar Amorim de Melo, Marcelo Montini |
| On-Site Speaker (Planned) |
Adriano Lucheta |
| Abstract Scope |
Large-scale bauxite residue (BR) reuse is still a challenge for alumina industries. Efforts in developing agronomic applications for the BR can represent a sustainable and economically viable option for soil fertility improvement in countries where agriculture plays a crucial economical role, such as Brazil. This study reports a biological approach to mitigate the BR´s hazardous characteristics, such as high alkalinity, allowing its safe application as a soil conditioner for acidic tropical soils fertility amelioration. Microcosm tests were established to assess the effect of local agro-industrial organic residues incorporation to the BR in order to generate acidity, while highly fertile undisturbed soil was added as a microbial inoculum. Results confirmed that the organic residues added to BR improved its physical-chemical characteristics, allowing further research into its agronomic effects. |
| Proceedings Inclusion? |
Planned: Light Metals |