139913 - Phytotoxicity, bioaccumulation, and degradation of nonylphenol in different microalgal.pdf (1.06 MB)
Phytotoxicity, bioaccumulation, and degradation of nonylphenol in different microalgal species without bacterial influences
journal contribution
posted on 2023-05-20, 16:06 authored by He, N, Liu, Z, Sun, X, Shuangyao WangShuangyao Wang, Liu, W, Sun, D, Duan, S Nonylphenol (NP) is a contaminant that has negative impacts on aquatic organisms. To investigate its phytotoxicity, bioaccumulation, and degradation in algae without associated bacteria, six freshwater microalgae—Ankistrodesmus acicularis, Chlorella vulgaris, Chroococcus minutus,, Scenedesmus obliquus, Scenedesmus quadricauda, and Selenastrum bibraianum—in bacteria-free cultures were studied. When exposed to 0.5–3.0 mg L−1 NP for 4 days, cell growth and photosynthesis, including maximal photochemistry (Fv/Fm), were suppressed progressively. The antioxidant responses of superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) showed species differences. While the antioxidant enzymes in C. vulgaris and S. obliquus were more active with the increase of NP (0–3 mg L−1), they dropped in the other four algae at concentrations of 1 and 1.5 mg L−1. Therefore, C. vulgaris and S. obliquus were designated as NP-tolerant species and showed more conspicuous and faster changes of antioxidant reactions compared with the four NP-sensitive species. All six species degraded NP, but A. acicularis was more reactive at low NP concentrations (<1 mg L−1), suggesting its possible application in sewage treatment for its potential for effective NP removal from water bodies in a suitable scope. Therefore, the conclusion is that biodegradation of NP by algae is species specific.
History
Publication title
International Journal of Molecular SciencesVolume
21Issue
4Article number
1338Number
1338Pagination
1-13ISSN
1422-0067Department/School
Institute for Marine and Antarctic StudiesPublisher
Molecular Diversity Preservation InternationalPlace of publication
Matthaeusstrasse 11, Basel, Switzerland, Ch-4057Rights statement
© 2020 by the authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/Repository Status
- Open