Zebrafish embryo bioassays for a comprehensive evaluation of microalgae efficiency in the removal of diclofenac from water

The Science of the Total Environment
C EscapaM Otero

Abstract

This work deals with a preliminary study aimed at evaluating the efficiency of three different microalgae strains, namely Chlorella sorokiniana, Chlorella vulgaris and Scenedesmus obliquus in the bioremediation of diclofenac contaminated water. For this purpose, microalgae were cultured in bubbling column photobioreactors (PBRs) under batch operation until the end of the exponential growth phase. For the three strains, the concentration of diclofenac in the PBRs aquatic medium decreased along microalgae growing, which pointed to biodegradation as the main removal mechanism. Among the three strains, S. obliquus was the most capable to reduce diclofenac concentration (99% removal from an initial concentration of 25,000 μg l-1). However, such a large removal does not guarantee an efficient treatment since transformation products (TPs) exceeding the concentration and/or toxicity of the parent compound may be generated during biodegradation of diclofenac. Thus, for a comprehensive evaluation of the microalgae treatments efficiency, the final effluents from the PBRs were tested for their effects on the embryonic development of zebrafish. Again, the S. obliquus treatment was the most efficient in the reduction of toxicity, with the co...Continue Reading

Citations

May 30, 2020·International Journal of Environmental Research and Public Health·Andreia SilvaMarta Otero
May 30, 2019·International Journal of Molecular Sciences·Krystian Miazek, Beata Brozek-Pluska
Feb 13, 2021·The Science of the Total Environment·Alan RempelLuciane Maria Colla
Oct 16, 2019·Ecotoxicology and Environmental Safety·Sabrine Ben OuadaSami Sayadi
Jul 25, 2021·The Science of the Total Environment·Ana M F CapitãoL Filipe C Castro
Nov 7, 2021·The Science of the Total Environment·Xiangmeng MaQun Wei

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