Impact of the Application of Landfill Leachate on the Germination of Senna macranthera in Different Substrates

Landfill leachate is a potential environmental pollutant. Physicochemical analyses allow identifying its elements while the use of ecotoxicological tests aims to understand the relation with the environment. The germination assay of Senna macranthera in different substrates (filter paper, commercial-SCM, conventional-SCV and organic-SOR) was performed with different doses of leachate. The objective was to identify the potential impact of leachate by determining the concentration able to cause inhibition in 50% of the seeds (LC50) and the values of the no observable effect concentration (NOEC) and the lowest observed effect concentration (LOEC). The LC50 and LOEC occurred in the treatments with 6.25 while NOEC was with 3.125%. The test in substrates, It was not possible to identify the LC50 in the SCM. For the SCV was with 66 and in SOR with 25%. The NOEC and LOEC for SCM and SCV were 25 and 50% and in SOR with 50 and 100%.O lixiviado de aterro é um potencial poluente ambiental. Análises físico-químicas permitem identificar seus elementos enquanto o uso de testes ecotoxicológicos visa compreender a relação com o ambiente. O ensaio de germinação de Senna macranthera em diferentes substratos (papel de filtro, comercial-SCM, convencional-SCV e orgânica-SOR) foi realizada com diferentes doses de lixiviado. O objetivo foi identificar o impacto potencial do lixiviado via determinação da concentração capaz de causar inibição em 50% do sementes (CL50) e os valores da concentração de efeito não observável (CENO) e a concentração de efeitos observados (CEO). A CL50 e a CEO ocorreu nos tratamentos com 6,25% enquanto a CENO ocorreu com 3,125%. Não foi possível identificar o CL50 no SCM. Para o SCV ocorreu com 66% e em SOR com 25%. A CENO e CEO para SCM e SCV foram 25% e 50% e em SOR com 50% e 100%