Microalgae cultivation on wastewater digestate: β-estradiol and 17α-ethynylestradiol degradation and transformation products identification

Journal of Environmental Management
Andrea Hom-DiazPaqui Blánquez

Abstract

Selenastrum capricornutum and Chlamydomonas reinhardtii were tested for possible biodegradation of the hormones β-estradiol (E2) and 17α-ethinylestradiol (EE2) when cultured in anaerobic digester centrate (ADC). Neither ADC nor the hormones had a negative or toxic effect on the microalgae growth but enhanced it. E2 and EE2 biodegradation was evaluated under different culture conditions. After 7 days of treatment, between 88% and 100% of E2 was removed by S. capricornutum. Overall, 42 and 54% of the removal was attributed to biodegradation processes, while the rest of the removal was due to adsorption onto the algae biomass. For EE2, removals between 60 and 95%, depending on the culture conditions, were achieved, with biodegradation accounting for 20-54% of the removal. E2 and EE2 were completely removed in the experiments performed with C. reinhardtii, except for EE2 in the presence of ADC, which decreased to 76%. However, C. reinhardtii presented higher adsorption percentages: 86% and 71% after 7 days for E2 and EE2, respectively. Transformation products (TPs) of E2 and EE2 generated in each treatment were also monitored. Two TPs were tentatively proposed as degradation products of E2 and EE2 by the algae. In addition, the rem...Continue Reading

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Citations

May 3, 2016·Journal of Hazardous Materials·Zane N NorvillBenoit Guieysse
Mar 8, 2018·International Journal of Environmental Research and Public Health·Weijie LiuShunshan Duan
Feb 14, 2019·Environmental Science and Pollution Research International·Weiwei YuMinne Zhang
Sep 22, 2017·Environmental Technology·Chantima Ruksrithong, Songkeart Phattarapattamawong
Jul 19, 2020·Bioprocess and Biosystems Engineering·Aline ViancelliHelen Treichel
May 30, 2020·International Journal of Environmental Research and Public Health·Andreia SilvaMarta Otero
Jul 13, 2019·Bioresource Technology·Dillirani NagarajanJo-Shu Chang
Feb 20, 2021·Journal of Environmental Management·Ranbin LiuXiaodi Hao
Dec 4, 2020·Journal of Hazardous Materials·Sufia HenaJean-Philippe Croué
Apr 17, 2021·Physiologia Plantarum·Martin PlöhnChristiane Funk
Aug 4, 2021·International Journal of Phytoremediation·Palak SaketAbhijeet Joshi

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