Article
Environmental Sciences
Yiling Li, Wen-Xiong Wang
Summary: This study investigated the uptake, intracellular dissolution, and cytotoxicity of silver nanowires (AgNWs) in two different cell models. The findings suggest that the cytotoxicity of AgNWs in human keratinocytes and macrophages is mainly due to the high aspect ratio of the nanowires rather than the extracellular release of Ag+.
Article
Environmental Sciences
Chaoli Shi, Zhiqun Liu, Bingzhi Yu, Yinan Zhang, Hongmei Yang, Yu Han, Binhao Wang, Zhiquan Liu, Hangjun Zhang
Summary: This article provides an overview of the environmental occurrence and toxicity of nanoplastics in the aquatic environment, highlighting the need for further research in this area. Nanoplastics have been found in oceans, rivers, and nature reserves around the world, and can have toxic effects on aquatic organisms. Future investigations should focus on chemical analysis methods for nanoplastics, effects and mechanisms of nanoplastics at relevant concentrations in aquatic organisms, as well as the Trojan horse effect of nanoplastics.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Engineering, Environmental
Yi Yang, Xin Chen, Nan Zhang, Binbin Sun, Kunkun Wang, Yinqing Zhang, Lingyan Zhu
Summary: This study investigates the effects of extracellular polymeric substances (EPS) released by Escherichia coli (E. coli) on the dissolution and sulfidation of silver nanoparticles (AgNPs) and the associated growth inhibition to E. coli. The results show that EPS inhibited AgNPs dissolution, but facilitated the reductive transformation of Ag+ to Ag(0) under simulated sunlight. EPS also enhanced the colloidal stability of AgNPs and promoted sulfidation, thereby reducing the available dissolved Ag+ ions and relieving the antibacterial activity of AgNPs to E. coli.
Article
Engineering, Environmental
Yi Yang, Nan Zhang, Qi You, Xin Chen, Yinqing Zhang, Lingyan Zhu
Summary: Due to the increasing applications, silver nanoparticles (AgNPs) are released into the environment and undergo various transformations. The presence of chloride ion (Cl-) in aquatic environments and its strong affinity for silver play a significant role in these transformations. The concentration of Cl- affects the multistep chlorination of AgNPs, with dissolution accelerated at a Cl/Ag ratio of 1, and the intensive etching effect of Cl- leading to significant morphology changes. The overall transformation rate increases when the Cl/Ag ratio reaches 10,000, due to complexation of Cl- with AgCl(s) to form soluble AgClx(x-1)-species.
Article
Environmental Sciences
Zainab Mat Lazim, Salmiati Salmiati, Marpongahtun Marpongahtun, Nor Zaiha Arman, Mohd Ridza Mohd Haniffah, Shamila Azman, Ee Ling Yong, Mohd Razman Salim
Summary: This study investigates the distribution of silver and silver nanoparticles in the aquatic environment of Skudai River in Malaysia. The results show that silver and silver nanoparticles accumulate in water, sediment, plants, and fish samples, with fish samples showing the highest accumulation. The findings suggest that Skudai River is polluted by silver and silver nanoparticles, which could pose a risk to fish consumers.
Article
Engineering, Environmental
Zhongyu Guo, Dilini Kodikara, Luthfia Shofi Albi, Yuta Hatano, Guo Chen, Chihiro Yoshimura, Jieqiong Wang
Summary: Photochemical reactions are important in aquatic eco-systems and especially efficient for organic micropollutants that cannot undergo hydrolysis or biodegradation. Recent studies suggest that photodegradation may play a more significant role than biodegradation in transforming organic micropollutants in the aquatic environment. The process of photodegradation is complex and can be influenced by factors such as water matrix composition and physical conditions. This review provides a concise summary of the importance of photodegradation, major processes involved, and highlights knowledge gaps in the field of environmental photochemistry.
Review
Engineering, Environmental
Muhammad Junaid, Shulin Liu, Guanglong Chen, Hongping Liao, Jun Wang
Summary: This review summarizes the research on the transgenerational impacts of micro(nano)plastics (MNPs) in aquatic and terrestrial organisms, highlighting the factors influencing these impacts such as MNP properties, exposure type and duration, and interactions with other chemicals. It suggests that selecting MNP properties based on their realistic environmental behavior, employing diverse animal models, and considering chronic and mixture exposure are important research prospects for a deeper understanding of the transgenerational impacts of MNPs.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Zhao Liu, Chao Ma, Xinyang Li, Zexing Deng, Zhuojun Tian
Summary: This study reveals the impact of large-scale floating photovoltaic (FPV) power stations on the aquatic environment through long-term monitoring and data analysis. The results show that FPV reduces the concentration of dissolved oxygen, while increasing the concentration of chlorophyll a, nitrate nitrogen, and total phosphorus. FPV also has a cooling effect during the daytime and a thermal insulation effect at night on the water body.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Green & Sustainable Science & Technology
Fatimah Md Yusoff, Ahmad Fikri Abdullah, Ahmad Zaharin Aris, Wahidah Ahmad Dini Umi
Summary: The COVID-19 pandemic has both positive and negative impacts on aquatic ecosystems and environments. While reduced human activities led to improved water quality, the surge of plastics and biomedical wastes during the pandemic increased the risk of aquatic pollution, negatively affecting fisheries and aquaculture industries.
Article
Environmental Sciences
Ting-Wei Lee, Yu-Heng Lai, Jeng-Lung Chen, Chiaying Chen
Summary: This study demonstrates the key factors affecting the biological impacts of chemically exfoliated molybdenum nanosheets (ceMoS2), including their bioavailability and chemical speciation transitions during aging. The release of aging products from ceMoS2 and their interaction with natural organic matter (NOM) attenuate the toxicity of ceMoS2 to aquatic organisms.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Zhong Zhang, Yang Zhou, Lanfang Han, Xiaoyu Guo, Zihao Wu, Jingyun Fang, Banglei Hou, Yanpeng Cai, Jin Jiang, Zhifeng Yang
Summary: In this study, the concentrations of disinfection byproducts (DBPs) and COVID-19 related pharmaceuticals in waste-water effluents and surface water were measured before and after the lockdown in Wuhan. The study found that intensified disinfection during the COVID-19 pandemic had limited impacts on the occurrence of DBPs in the aquatic environment, but it led to a significant increase in concentrations of lopinavir and ritonavir. The research suggests the need for monitoring COVID-19 related pharmaceuticals and evaluating their ecotoxicities in the aquatic environment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Muhammad Junaid, Junaid Ali Siddiqui, Shulin Liu, Ruijie Lan, Zohaib Abbas, Guanglong Chen, Jun Wang
Summary: Microplastics and nanoplastics, known as micro(nano)plastics (MNPs), are found widely in freshwater and marine habitats, posing significant negative effects on exposed organisms. In particular, the transgenerational toxicity of MNPs has gained attention recently for its potential harm to both parents and offspring. This review summarizes existing literature on the transgenerational combined effects of MNPs and chemicals, aiming to provide a better understanding of the toxicity of MNPs and co-occurring chemicals in aquatic environments. The reviewed studies demonstrate that exposure to MNPs, along with inorganic and organic pollutants, leads to increased bioaccumulation of MNPs and co-occurring chemicals, impacting survival, growth, reproduction, genetic toxicity, thyroid disruption, and oxidative stress. The review also highlights factors influencing the transgenerational toxicity of MNPs and chemicals, such as MNP characteristics, exposure type and duration, and interactions with other chemicals. Future research directions, including considering MNP properties in realistic environmental conditions, using a broader range of animal models, and studying chronic exposure and MNP-chemical mixture exposure, are discussed to enhance understanding of the transgenerational effects of MNPs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Lingxiangyu Li, Ashfeen Ubaid Khan, Xiang Zhang, Xiaoting Qian, Yawei Wang
Summary: This study found that in simulated tear fluid containing proteins, both Ag-NPs and ZnO-NPs exhibited high chemical stability but decreased antibacterial efficacy, while in protein-free simulated tear fluid, they gradually transformed into AgCl and Zn-5(CO3)(2)(OH)(6) respectively, showing different antibacterial activities.
ENVIRONMENTAL SCIENCE-NANO
(2021)
Review
Biotechnology & Applied Microbiology
Jia Kang, Ning Zhou, Yao-wen Zhang, Yi-hang Wang, Chu-qiong Song, Xu Gao, Gang-fu Song, Jin-song Guo, Lei Huang, Teng-fei Ma, Xin Yu
Summary: This review summarizes the preparation methods, applications, migration and transformation behavior, and toxic effects of silver nanoparticles (AgNPs) in aquatic environments.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Biochemistry & Molecular Biology
Jaafar Amro, Corbin Black, Zakaria Jemouai, Nathan Rooney, Caroline Daneault, Natalie Zeytuni, Matthieu Ruiz, Khanh Huy Bui, Christian Baron
Summary: Agrobacterium tumefaciens is a natural genetic engineer that transfers DNA into plants through a type IV secretion system and T-pili.