NL. Figueiredo have been involved in researches related with how environmental contaminants, especially aquatic pollutants, affect aquatic organisms, from microbial cell to vertebrate, and how microorganisms and plant can be use to mitigate the risk associate to the aquatic system pollution.
Currently, she is involved in the Project PAHMIX - a molecular approach to improve environmental risk assessment strategies. FCT/MCTES (PTDC/CTA-AMB/29173/2017).