Microplastics influence the fate of antibiotics in freshwater environments: Biofilm formation and its effect on adsorption behavior

He, Siying; Tong, Jing; Xiong, Weiping; Xiang, Yinping; Peng, Haihao; Wang, Wenjun; Yang, Yang; Ye, Yuhang; Hu, Min; Yang, Zhen; Zeng, Guangming

doi:10.1016/j.jhazmat.2022.130078

Cited by 55 publications

(13 citation statements)

References 30 publications

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“…34 Depending on the concentration of residual antibiotics in the environment, the adsorption of antibiotics on plastic particles may alter the composition and volume of microbial communities. 35 Our results showed that antibiotic concentrations adsorbed on NPs were consistent with other environmentally relevant studies. 36,37 Although present studies showed a correlative link between antibiotic adsorption and ARB presence on larger MPs, 38,39 the effects of adsorbed antibiotics in the smaller NPs on microbial communities are unclear.…”

Section: ■ Discussionsupporting

confidence: 91%

“…With the increasingly pervasive plastic pollution in the environment, the plastisphere in MPs is increasingly recognized as an emerging ecological ecosystem for microbial communities . Depending on the concentration of residual antibiotics in the environment, the adsorption of antibiotics on plastic particles may alter the composition and volume of microbial communities . Our results showed that antibiotic concentrations adsorbed on NPs were consistent with other environmentally relevant studies. , …”

Section: Discussionsupporting

confidence: 89%

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Simultaneous Dissemination of Nanoplastics and Antibiotic Resistance by Nematode Couriers

Chan

Liu

et al. 2023

Environ. Sci. Technol.

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Nanoplastics (NPs) are increasingly recognized as a newly emerging pollutant in the environment. NPs can enable the colonization of microbial pathogens on their surfaces and adsorb toxic pollutants, such as heavy metals and residual antibiotics. Although the dissemination of plastic particles in water bodies and the atmosphere is widely studied, the dissemination of NPs and adsorbed pollutants on land, via biological means, is poorly understood. Since soil animals, such as the bacterivorous nematode Caenorhabditis elegans (C. elegans), are highly mobile, this raises the possibility that they play an active role in disseminating NPs and adsorbed pollutants. Here, we established that antibiotic-resistant bacteria could aggregate with antibiotic-adsorbed NPs to form antibiotic-adsorbed NP-antibiotic resistant bacteria (ANP-ARB) aggregates, using polymyxins (colistin) as a proof-of-concept. Colistin-resistant mcr-1 bearing Escherichia coli from a mixed population of resistant and sensitive bacteria selectively aggregate with colistin-ANPs. In the soil microcosm, C. elegans fed on ANP-ARB clusters, resulting in the rapid spread of ANP-ARB by the nematodes across the soil at a rate of 40–60 cm per day. Our work revealed insights into how NPs could still disseminate across the soil faster than previously thought by “hitching a ride” in soil animals and acting as agents of antibiotic-resistant pathogens and antibiotic contaminants. This poses direct risks to ecology, agricultural sustainability, and human health.

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Section: ■ Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 89%

Simultaneous Dissemination of Nanoplastics and Antibiotic Resistance by Nematode Couriers

Chan

Liu

et al. 2023

Environ. Sci. Technol.

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“…The increase in the oxygen content of Bio-TWPs was manifested from the XPS analysis (Table S2), suggesting the existence of oxygen-containing groups in the various components of microbial biofilms. This may be related to the accumulation of lipids and polysaccharides during biofilm formation …”

Section: Resultsmentioning

confidence: 99%

“…This may be related to the accumulation of lipids and polysaccharides during biofilm formation. 29 Bacterial Community on the Biofilms on TWPs. The composition of the microbial community on biofilm-covered TWPs was analyzed using 16S rRNA gene high-throughput sequencing.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Biofilm-Colonized versus Virgin Black Microplastics to Accelerate the Photodegradation of Tetracycline in Aquatic Environments: Analysis of Underneath Mechanisms

Ding

Ouyang

Zhang

et al. 2023

Environ. Sci. Technol.

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Tire wear particles (TWPs) exposed to the aquatic environment are rapidly colonized by microorganisms and provide unique substrates for biofilm formation, which potentially serve as vectors for tetracycline (TC) to influence their behaviors and potential risks. To date, the photodegradation capacity of TWPs on contaminants due to biofilm formation has not been quantified. To accomplish this, we examined the ability of virgin TWPs (V-TWPs) and biofilm-developed TWPs (Bio-TWPs) to photodegrade TC when exposed to simulated sunlight irradiation. V-TWPs and Bio-TWPs accelerated the photodegradation of TC, with rates (k obs) of 0.0232 ± 0.0014 and 0.0152 ± 0.0010 h–1, respectively (k obs increased by 2.5–3.7 times compared to that for only TC solution). An important factor of increased TC photodegradation behavior was identified and linked to the changed reactive oxygen species (ROS) of different TWPs. The V-TWPs were exposed to light for 48 h, resulting in more ROS for attacking TC, with hydroxyl radicals (•OH) and superoxide anions (O2 •–) playing a dominant role in TC photodegradation measured using scavenger/probe chemicals. This was primarily due to the greater photosensitization effects and higher electron-transfer capacity of V-TWPs in comparison to Bio-TWPs. In addition, this study first sheds light on the unique effect and intrinsic mechanism of the crucial role of Bio-TWPs in TC photodegradation, enhancing our holistic understanding of the environmental behavior of TWPs and the associated contaminants.

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“…Compounds incapable of these interactions, however, tend to decrease in adsorption onto aged microplastics . These interactions are further complicated by the formation of biofilm on aged microplastic surfaces …”

Section: Introductionmentioning

confidence: 99%

Machine Learning Prediction of Adsorption Behavior of Xenobiotics on Microplastics under Different Environmental Conditions

Bryant

2023

ACS EST Water

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There have been mounting concerns over microplastics as a vector of environmental xenobiotics recently. Adsorption plays a pivotal role in this process, which varies with the properties of xenobiotics, the characteristics of microplastics, and environmental conditions. The vast number of xenobiotics and the diversity of microplastics, as well as the continuous weathering of microplastics in the environment, make it unrealistic to measure the adsorption capacity and affinity of each combination of xenobiotics, microplastics, and environmental conditions in laboratory studies. Random Forest (RF) and Artificial Neural Network (ANN) algorithms were used to predict the adsorption affinity of xenobiotics on microplastics and elucidate the impact of environmental parameters. pH is responsible for a large variation in the results through its effect on the dissociation of ionizable xenobiotics and the surface charge of microplastics. The aging status of microplastics had a smaller but still significant impact on adsorption affinity, with pristine particles generally having a higher affinity. The results shed light on the potential alteration of the fate and impact of xenobiotics by microplastics. As more data become available in the future, the precision of machine learning (ML) models can be further improved. Overall, our study demonstrated the potential of ML in predicting the adsorption of a wide range of xenobiotics on microplastics.

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Microplastics influence the fate of antibiotics in freshwater environments: Biofilm formation and its effect on adsorption behavior

Cited by 55 publications

References 30 publications

Simultaneous Dissemination of Nanoplastics and Antibiotic Resistance by Nematode Couriers

Simultaneous Dissemination of Nanoplastics and Antibiotic Resistance by Nematode Couriers

Biofilm-Colonized versus Virgin Black Microplastics to Accelerate the Photodegradation of Tetracycline in Aquatic Environments: Analysis of Underneath Mechanisms

Machine Learning Prediction of Adsorption Behavior of Xenobiotics on Microplastics under Different Environmental Conditions

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