RESUMOO monitoramento de recalques diferenciais é utilizado para estimar o aumento do ciclo de vida de aterros sanitários, manter a estabilização de taludes e a segurança das operações. O objetivo da pesquisa foi utilizar a metodologia de mecânica dos solos para determinação dos índices físicos utilizados para o cálculo da compressibilidade de Resíduos Sólidos Urbanos (RSU). As amostras de RSU foram coletadas em um aterro sanitário no Brasil, em duas profundidades diferentes -Grupo 1 (0,5 m), Grupo 2 (0,8 m).
This study evaluated the potential of Bacillus thuringiensis biofilters and natural substrates for removal of the natural estrogen 17β-estradiol (E2) in aqueous solutions. Filters biologically activated with this bacterium and containing rice husk ash (RHA) or activated carbon (AC) were monitored for 20 days for biofilm formation. In all samples, E2 was quantified by SPE (solid phase extraction) and LC-MS/MS (liquid chromatography coupled to mass spectrometry). The results showed 83% removal for the biofilter containing RHA and 86% for AC, indicating the potential of the bacterium Bacillus thuringiensis to biodegrade E2. This study demonstrated that biofiltration can be a method used for E2 removal.
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