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Bioaccumulation processes for mercury removal from saline waters by green, brown and red living marine macroalgae

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Abstract

Mercury is a very toxic metal that persists and accumulates in the living organisms present in the aquatic systems and its elimination is an urgent need. Two green (Ulva intestinalis and Ulva lactuca), brown (Fucus spiralis and Fucus vesiculosus), and red (Gracilaria sp. and Osmundea pinnatifida) marine macroalgae were tested for mercury removal from saline waters. The ability of each species was evaluated to the initial mercury concentrations of 50, 200, and 500 μg dm-3 along 72 h. In general, all species exhibited good performances, removing 80.9–99.9% from solutions with 50 μg dm-3, 79.3–98.6% from solutions with 200 μg dm-3, and 69.8–97.7% from solutions containing 500 μg dm-3 of mercury. Among the macroalgae, Ulva intestinalis showed the highest affinity to mercury and it presented an uptake ability up to 1888 μg g-1 of Hg(II) and bioconcentration factors up to 3823, which proved its promising potential on Hg removal.

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All data generated or analyzed during this study are included in this published article (and its supplementary information files) or are available from the corresponding author on reasonable request.

Funding

This work has been supported by the project Nº46998_N9ve-REE co-funded by Portugal 2020 program (PT2020), PO Centro, and European Structural and Investment Funds. E. Fabre acknowledges the financial support of CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico), Brazil. Bruno Henriques benefited from a Research contract (CEECIND/03511/2018) under the CEEC Individual 2018, funded by national funds (OE), through FCT – Fundação para a Ciência e a Tecnologia, I.P. Thanks are also due to the financial support to CICECO-Aveiro Institute of Materials (UID/CTM/50011/2019) and to CESAM (UID/AMB/50017), by FCT/MEC through national funds, and the co-funding by the FEDER, within the PT2020 Partnership Agreement and Compete 2020.

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Contributions

The authors’ contribution to the development of this work is described below:

Elaine Fabre: writing, experimental performing, and data analysis

Mariana Dias: experimental performing and data analysis

Bruno Henriques: scientific orientation, data analysis, and writing

Thainara Viana: experimental performing

Nicole Ferreira: experimental performing

José Soares: experimental performing

João Pinto: experimental performing

Carlos Vale: scientific orientation, data analysis, and writing

José M. P. Torres: data analysis and funding acquisition

Carlos M. Silva: scientific orientation, data analysis, funding acquisition, and writing

Eduarda Pereira: scientific orientation, data analysis, funding acquisition, and writing

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Correspondence to Carlos M. Silva or Eduarda Pereira.

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The authors declare no competing interests.

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Responsible Editor: Vitor Manuel Oliveira Vasconcelos

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Fabre, E., Dias, M., Henriques, B. et al. Bioaccumulation processes for mercury removal from saline waters by green, brown and red living marine macroalgae. Environ Sci Pollut Res 28, 30255–30266 (2021). https://doi.org/10.1007/s11356-021-12687-2

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  • DOI: https://doi.org/10.1007/s11356-021-12687-2

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