Interaction Between Emerging Contaminants and Microalgae: Ecotoxicity and Biotechnology

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Response to Abiotic Stress and Climate Change".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 611

Special Issue Editor


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Guest Editor
College of Ecology and Environment, Nanjing Forestry University, Nanjing 210037, China
Interests: emerging contaminants; microalgae; environmental fate; ecological risk; advanced oxidation; water treatment

Special Issue Information

Dear Colleagues,

Emerging contaminants in water environments pose great threats to ecosystems and the emergence of contaminants induces negative effects on microalgae, such as growth inhibition, oxidative damage, photosystem damage. Additionally, long-term exposure to multiple emerging contaminants may increase their potential risk; therefore, it is crucial to advance our knowledge regarding the exposure and risk of emerging contaminants in the water environment. Meanwhile, microalgae, while under stress, have the ability to biologically degrade these contaminants. Microalgae-based biodegradation technology offers an alternative strategy for water treatment, optimizing technical approaches not only to providing environmentally friendly and low-ecological-risk water treatment strategies, but also to providing more biomass-sourced energy and carbon dioxide fixation.

In light of this, this Special Issue invites you to contribute your recent research focusing on the ecotoxic effects emerging contaminants exert on microalgae, mechanisms for their removal, and risk assessments thereof, as well as feasibility studies of microalgae-based biodegradation technologies. Potential topics of interest include, but are not limited to:

  1. The ecotoxic effects emerging contaminants exert on microalgae in water environments;
  2. The risk assessment and management of emerging contaminants to microalgae;
  3. Microalgae-based biodegradation technology;
  4. Biomass energy related to microalgae treatment;
  5. Carbon fixation related to microalgae treatment.

Prof. Dr. Wei Li
Guest Editor

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Keywords

  • microalgae
  • emerging contaminants
  • ecotoxicity
  • biodegradation
  • biological wastewater treatment
  • biomass and bioenergy
  • carbon fixation

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Published Papers (1 paper)

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Research

17 pages, 1529 KiB  
Article
Phycospheric Bacteria Alleviate the Stress of Erythromycin on Auxenochlorella pyrenoidosa by Regulating Nitrogen Metabolism
by Jiping Li, Ying Wang, Yuan Fang, Xingsheng Lyu, Zixin Zhu, Chenyang Wu, Zijie Xu, Wei Li, Naisen Liu, Chenggong Du and Yan Wang
Plants 2025, 14(1), 121; https://doi.org/10.3390/plants14010121 - 3 Jan 2025
Viewed by 504
Abstract
Macrolide pollution has attracted a great deal of attention because of its ecotoxic effects on microalgae, but the role of phycospheric bacteria under antibiotic stress remains unclear. This study explored the toxic effects of erythromycin (ERY) on the growth and nitrogen metabolism of [...] Read more.
Macrolide pollution has attracted a great deal of attention because of its ecotoxic effects on microalgae, but the role of phycospheric bacteria under antibiotic stress remains unclear. This study explored the toxic effects of erythromycin (ERY) on the growth and nitrogen metabolism of Auxenochlorella pyrenoidosa; then, it analyzed and predicted the effects of the composition and ecological function of phycospheric bacteria on microalgae under ERY stress. We found that 0.1, 1.0, and 10 mg/L ERY inhibited the growth and chlorophyll of microalgae, but the microalgae gradually showed enhanced growth abilities over the course of 21 days. As the exposure time progressed, the nitrate reductase activities of the microalgae gradually increased, but remained significantly lower than that of the control group at 21 d. NO3 concentrations in all treatment groups decreased gradually and were consistent with microalgae growth. NO2 concentrations in the three treatment groups were lower than those in the control group during ERY exposure over 21 d. ERY changed the community composition and diversity of phycospheric bacteria. The relative abundance of bacteria, such as unclassified-f-Rhizobiaceae, Mesorhizobium, Sphingopyxis, Aquimonas, and Blastomonas, varied to different degrees. Metabolic functions, such ABC transporters, the microbial metabolism in diverse environments, and the biosynthesis of amino acids, were significantly upregulated in the treatments of higher concentrations (1.0 and 10 mg/L). Higher concentrations of ERY significantly inhibited nitrate denitrification, nitrous oxide denitrification, nitrite denitrification, and nitrite and nitrate respiration. The findings of this study suggest that phycospheric bacteria alleviate antibiotic stress and restore the growth of microalgae by regulating nitrogen metabolism in the exposure system. Full article
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