Toxicity of acrylamide after degradation by conjugated (UV/H2O2) photolysis in microalgae

Acrylamide (AA) is routinely used in laboratories and industries, and its disposal is always a problem; consequently, offering an alternative for their treatment contributes to conducting research in a responsible way. Therefore, in this work, acrylamide solutions were degraded by ultraviolet radiat...

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Bibliographic Details
Published in:Environmental science and pollution research international 2021-07, Vol.28 (28), p.38085-38093
Main Authors: Zilli, Suzan Costa, Grehs, Bárbara Werle Nunes, Carissimi, Elvis, Pizzolato, Tânia Mara, da Silva, William Leonardo, Silvestri, Siara
Format: Article
Language:English
Subjects:
Acrylamide
Algae
Aquatic microorganisms
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
By products
Byproducts
Degradation
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Exposure
Hydrogen peroxide
Liquid chromatography
Microalgae
Photolysis
Research Article
Toxicity
Ultraviolet radiation
Waste Water Technology
Water Management
Water Pollution Control
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Summary:Acrylamide (AA) is routinely used in laboratories and industries, and its disposal is always a problem; consequently, offering an alternative for their treatment contributes to conducting research in a responsible way. Therefore, in this work, acrylamide solutions were degraded by ultraviolet radiation and hydrogen peroxide (H 2 O 2 ), and their toxicity was evaluated using a Desmodesmus quadricauda microalgae growth assay. The AA solutions were exposed to different dosages of H 2 O 2 and different exposure times to UV radiation. The degradation was evaluated by liquid chromatography, which allowed the identification of the acrylamide peak and subsequent by-product peaks. A 100% degradation of the 1.5 mg L −1 AA solution with UV/H 2 O 2 (0.034 g L −1 ) was achieved in just 10 min. The by-products formed did not inhibit the growth of D. quadricauda microalgae. The number of D. quadricauda individuals that grew in acrylamide solutions exposed to 20 and 30 min of UV radiation, with 0.034 g L −1 of H 2 O 2 , was very similar to the number of individuals that grew in the control solution. Thus, the treatment proposed in this work using H 2 O 2 combined with ultraviolet radiation degraded acrylamide into by-products with reduced toxicity. Graphical abstract
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-021-13355-1