Potencial de remoção de CO2 atmosférico por intemperismo intensificado (técnica de rochagem) em Mato Grosso : estudo de casos

Abstract

The use of soil remineralizers is an age-old practice gaining prominence as a sustainable and cost-effective alternative to soluble chemical fertilizers. These remineralizers, rich in nutrients, gradually supply essential elements for plant growth, mimicking natural soil regeneration processes. In addition to their effectiveness, this approach boasts low costs and additional benefits such as enhanced crop enrichment and increased agricultural production. In Brazil, where agriculture is vital to the economy, research and regulation of remineralizers have advanced, with 66 products registered with the Ministry of Agriculture. The exacerbation of the greenhouse effect drives the quest for strategies to reduce greenhouse gas (GHG) emissions. Agriculture is a significant source of CO2 emissions, particularly in Brazil, where agricultural practices contribute considerably to GHG emissions. Thus, adopting sustainable management practices is crucial to making agriculture more competitive and environmentally friendly. The use of soil remineralizers, in the context Enhanced Weathering, emerges as a promising technique for capturing atmospheric CO2, stimulating plant growth, and increasing carbon sequestration in the soil. This study analyzed three distinct geological occurrences in the state of Mato Grosso: the Colíder Group, Rio Cristalino, and Planalto da Serra Alkaline Complex. The results indicate that the samples have great potential for removing CO2 from the atmosphere, with values ranging from 39.53 kgCO2/t to 496.16 kgCO2/t. This suggests that Enhanced Weathering is an effective technique for climate change mitigation and that the studied rocks play a crucial role in this process. In the future, Enhanced Weathering could be part of a set of strategies to control GHG emissions and combat climate change, with an emphasis on using rocks with characteristics similar to those in this research.