Article
Environmental Sciences
Yuanzhen He, Hui Jin, Han Gao, Guoqing Zhang, Feng Ju
Summary: The antidiabetic drug metformin has become a new contaminant in water systems, and its byproducts have demonstrated toxicity in mammals. This study evaluated the distribution, formation, and ecotoxicity of these byproducts in Chinese urban water systems. The results showed that metformin and byproduct C concentrations were higher in densely populated urban areas and surface water sources. Byproduct C was mainly derived from the chlorination of metformin-contaminated water. The experiments demonstrated that both byproducts had significant toxic effects on the growth and photosynthesis of microalgae.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Marine & Freshwater Biology
Manuela D. Machado, Eduardo Soares
Summary: The study showed that triclosan can significantly impact the physiology and morphology of freshwater algae, leading to changes in cell size, intracellular reactive oxygen species accumulation, depletion of antioxidant defenses, and reduction in photosynthetic pigments. Additionally, different modes of action of triclosan on green algae were observed, highlighting the complexity of its toxicity mechanisms in non-target organisms.
AQUATIC TOXICOLOGY
(2021)
Article
Marine & Freshwater Biology
Vijay H. Masand, Magdi E. A. Zaki, Sami A. Al-Hussain, Anis Ben Ghorbal, Siddhartha Akasapu, Israa Lewaa, Arabinda Ghosh, Rahul D. Jawarkar
Summary: In this study, a QSTR model was developed for predicting the toxicity of microalgae using a data set of 271 molecules. The model showed high predictive ability and statistical robustness, making it suitable for toxicological interpretation of various chemicals.
AQUATIC TOXICOLOGY
(2021)
Article
Environmental Sciences
Jing Li, Lu Yang, Zhonghua Wu
Summary: The study showed that high concentrations of CTC and OTC have negative effects on the growth and metabolism process of Vallisneria natans under experimental conditions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Shahram Lotfi, Shahin Ahmadi, Parvin Kumar
Summary: In the ecotoxicological risk assessment, Quantitative Structure Toxicity Relationship (QSTR) modeling was used to assess the toxicity of different chemicals on Pseudokirchneriella subcapitata. The models showed good performance and high predictability. The study also identified the structural attributes responsible for the toxicity of the chemicals.
Article
Environmental Sciences
Jun-Kit Wan, Wan-Loy Chu, Yih-Yih Kok, Choy-Sin Lee
Summary: The study found that microalgae are sensitive to copper but tolerant to polystyrene microplastics and nanoplastics. However, the presence of microplastics and nanoplastics can increase the toxicity of copper, leading to oxidative stress and morphological changes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
V Nagarajan, R. Chandiramouli
Summary: In this study, the chemisorption of chlortetracycline (CTC) and oxytetracycline (OTC) molecules on theta phosphorene nanoribbon (theta-PNRibbon) was investigated based on the first-principles framework. The adsorption energy and charge transfer indicated the chemisorption of the target molecules, and the effects of adsorption on the electronic properties of theta-PNRibbon were studied.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Environmental Sciences
Sarra Karoui, Rim Ben Arfi, Maria J. Fernandez-Sanjurjo, Avelino Nunez-Delgado, Achraf Ghorbal, Esperanza Alvarez-Rodriguez
Summary: The study synthesized and characterized a reed-based enhanced adsorbent (BBR), optimized its efficiency for the removal of OTC and Cd(II), and elucidated the biosorption mechanisms. The results showed the BBR beads to be a cost-effective and efficient adsorbent with significant socioeconomic and environmental relevance.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Jin J. Li, Ya X. Yue, Jie F. Jiang, Sheng J. Shi, Hui X. Wu, Yuan H. Zhao, Fei F. Che
Summary: In this study, the mode of action (MOA) of antibiotics against nontarget organisms was investigated using 14 antibiotics and three different species. The results showed that there were poor interspecies toxicity correlations and that antibiotics exhibited excess toxicity to algae and Daphnia magna but not to Vibrio fischeri. Molecular docking simulations and QSAR models revealed that the interactions between antibiotics and target receptors played key roles in their toxicity. These results provide valuable insights into the toxic mechanisms and MOA of antibiotics in different species.
Article
Environmental Sciences
Jinjie Li, Tielan Wang, Junzeng Xue
Summary: The widespread use of disinfectants due to the COVID-19 pandemic can lead to increased levels of disinfection by-products (DBPs) in surface water, posing ecological risks. This study assessed the acute toxicity of haloacetic acids and halophenols DBPs on Pseudokirchneriella subcapitata and evaluated their impact on co-cultured algae communities. The results showed that exposure to DBPs significantly reduced the photosynthetic pigments of Pseudokirchneriella subcapitata and increased MDA content and antioxidant enzyme activity. The ecological risk assessment indicated medium to high risks for TBAA, 2,4-DBP, and 2,6-DBP. However, high-risk DBPs had minimal effect on the community structure of co-cultured algae, while low-risk DBPs had a greater impact and promoted the growth of cyanobacteria, potentially causing new ecological risks.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Marine & Freshwater Biology
Ntombikayise Mahaye, Samuel K. Leareng, Ndeke Musee
Summary: The study revealed that different sizes and coating types of gold nanoparticles have effects on algae growth and genomic stability, especially significant cytotoxic effects were observed with 5 nm BPEI-nAu at high concentrations, and 40 nm BPEI-nAu may lead to DNA damage recovery after a longer exposure period. The increase in apurinic/apyrimidinic sites content in genotoxicity studies indicated the ability of nAu to induce genotoxic effects, regardless of their size and coating type.
AQUATIC TOXICOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Rasmiah S. Almufarij, Babiker Y. Abdulkhair, Mutaz Salih, Nujud M. Alhamdan
Summary: Pharmaceutical pollution is a global issue in water resources, and this study suggests using toilet paper waste to create carbon nanoparticles as an effective solution. The synthesized CRNPs demonstrated high adsorption capacity for various drugs, making them a cost-effective sorbent for water remediation.
Article
Environmental Sciences
Andrea Broccoli, Serena Anselmi, Andrea Cavallo, Vittoria Ferrari, Daniela Prevedelli, Paolo Pastorino, Monia Renzi
Summary: This study evaluated the half maximal effective concentration (EC50) of nanoparticles, amoxicillin, and white musk on different microalgae species. The findings showed significant alterations in biochemical, molecular, and morphological aspects of the microalgae exposed to these chemicals, highlighting ecotoxicological risks in aquatic ecosystems.
Article
Environmental Sciences
Ntombikayise Mahaye, Ndeke Musee
Summary: This study evaluated the cytotoxic and genotoxic effects of cerium oxide nanoparticles on Pseudokirchneriella subcapitata. The results showed that the nanoparticles inhibited the growth of the algae in the short term but promoted growth in the long term. Additionally, the nanoparticles caused DNA damage. Therefore, sub-lethal concentrations of cerium oxide nanoparticles may pose a more serious threat to algae under chronic-exposure conditions.
Article
Environmental Sciences
Yu Wang, Xinye Gong, Deying Huang, Jibiao Zhang
Summary: Low doses of antibiotics can promote algal growth, while high concentrations of antibiotics can inhibit algal growth and affect the physiological functions of algae.