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Per capita coffee consumption in Brazil is estimated at 4.9 kg of roasted and ground coffee, which leads to a high generation of residual coffee grounds. The decomposition process promotes, among others, the formation of liquids. This study aimed to evaluate the environmental, ecotoxicological impact of the solubilized extract of coffee grounds on lettuce seeds. A completely randomized design with seven treatments with three replications was used. Ten lettuce seeds were placed in a Petri dish with filter paper substrate and moistened with 4.0 mL. equivalent to treatments. There was a negative effect of BCR extract on the germination rate but it was not possible to determine the LC50 dose with the tested treatments. Sublethal effect was observed from root growth of lettuce with increasing doses. The CEO was established on 0.1 mL treatment. Thus, it is evident that the species studied has low tolerance to the pollutant and that it presents itself as a potentially polluting substance.

Avaliação do Impacto do Extrato Solubilizado da Borra de Café sobre de Germinação de Sementes de Alface