Microplastics and nanoplastics最新文献_第3页

Why biofouling cannot contribute to the vertical transport of small microplastic. 为什么生物污损无法促进小型微塑料的垂直迁移？

Microplastics and nanoplastics Pub Date : 2024-01-01 Epub Date: 2024-10-07 DOI: 10.1186/s43591-024-00098-2

Ina Benner, Uta Passow

{"title":"Why biofouling cannot contribute to the vertical transport of small microplastic.","authors":"Ina Benner, Uta Passow","doi":"10.1186/s43591-024-00098-2","DOIUrl":"10.1186/s43591-024-00098-2","url":null,"abstract":"In contrast to expectations, even buoyant microplastics like polyethylene and polypropylene are found at high concentrations in deep sediment traps and deep-sea sediments. To explain the presence of such buoyant microplastic particles at great ocean depths, several vertical transport mechanisms are under discussion with biofouling as one of the most referred. Biofouling is thought to increase the density of microplastic particles to the point that they sink to the deep sea, but this has mostly been shown on large microplastic particles ≥ 1 mm. However, although microplastics are defined as particles between 1 and 5000 μm, most microplastics are < 100 μm. In the ocean plastic particles continuously fragment, converting each \"large\" particle into several \"small\" particles, and particle abundance increases drastically with decreasing size. We argue that biofouling is not a reasonable transport mechanism for small microplastic particles ≤ 100 μm, which form the majority of microplastics. Biofilm density depends on its community and composition. A biofilm matrix of extracellular polymeric substances and bacteria has a lower density than seawater, in contrast to diatoms or large organisms like mussels or barnacles. We suggest that a small microplastic particle cannot host a biofilm community consisting of the heavy organisms required to induce sinking. Furthermore, to reach the deep sea within a reasonable timespan, a microplastic particle needs to sink several meters per day. Therefore, the excess density has to not only exceed that of seawater, but also be large enough to enable rapid sinking. We thus argue that biofouling cannot be an efficient vertical transport mechanism for small microplastic. However, biofouling of small microplastic may promote the likelihood of its incorporation into sinking marine snow and increase the probability of its ingestion, allowing its transport to depth.","PeriodicalId":74190,"journal":{"name":"Microplastics and nanoplastics","volume":"4 1","pages":"19"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11458654/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142395758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Predator traits influence uptake and trophic transfer of nanoplastics in aquatic systems-a mechanistic study. 捕食者特征影响纳米塑料在水生系统中的吸收和营养转移--一项机理研究。

Microplastics and nanoplastics Pub Date : 2024-01-01 Epub Date: 2024-10-09 DOI: 10.1186/s43591-024-00096-4

Amy Ockenden, Denise M Mitrano, Melanie Kah, Louis A Tremblay, Kevin S Simon

{"title":"Predator traits influence uptake and trophic transfer of nanoplastics in aquatic systems-a mechanistic study.","authors":"Amy Ockenden, Denise M Mitrano, Melanie Kah, Louis A Tremblay, Kevin S Simon","doi":"10.1186/s43591-024-00096-4","DOIUrl":"https://doi.org/10.1186/s43591-024-00096-4","url":null,"abstract":"Predicting the response of aquatic species to environmental contaminants is challenging, in part because of the diverse biological traits within communities that influence their uptake and transfer of contaminants. Nanoplastics are a contaminant of growing concern, and previous research has documented their uptake and transfer in aquatic food webs. Employing an established method of nanoplastic tracking using metal-doped plastics, we studied the influence of biological traits on the uptake of nanoplastic from water and diet in freshwater predators through two exposure assays. We focused on backswimmers (Anisops wakefieldi) and damselfly larvae (Xanthocnemis zealandica) - two freshwater macroinvertebrates with contrasting physiological and morphological traits related to feeding and respiration strategies. Our findings reveal striking differences in nanoplastic transfer dynamics: damselfly larvae accumulated nanoplastics from water and diet and then efficiently eliminated 92% of nanoplastic after five days of depuration. In contrast, backswimmers did not accumulate nanoplastic from either source. Differences in nanoplastic transfer dynamics may be explained by the contrasting physiological and morphological traits of these organisms. Overall, our results highlight the importance and potential of considering biological traits in predicting transfer of nanoplastics through aquatic food webs.Supplementary information: The online version contains supplementary material available at 10.1186/s43591-024-00096-4.","PeriodicalId":74190,"journal":{"name":"Microplastics and nanoplastics","volume":"4 1","pages":"20"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11481666/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142482441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamics behavior of PE and PET oligomers in lipid bilayer simulations 脂质双分子层模拟中 PE 和 PET 低聚物的动力学行为

Microplastics and nanoplastics Pub Date : 2023-12-01 DOI: 10.1186/s43591-023-00076-0

Joni P. Järvenpää, Maija K. Lahtela-Kakkonen

引用次数: 0

Polymers of low concern? Assessment of microplastic particles used in 3D printing regarding their toxicity on Raphidocelis subcapitata and Daphnia magna 低关注度聚合物？评估 3D 打印中使用的微塑料颗粒对亚蚤和大型蚤的毒性

Microplastics and nanoplastics Pub Date : 2023-12-01 DOI: 10.1186/s43591-023-00078-y

Dana Kühnel, Tim Steska, K. Schlich, Carmen Wolf, Wendel Wohlleben, Kerstin Hund-Rinke

引用次数: 0

Correction: Investigating the correlation between morphological features of microplastics (5–500 µm) and their analytical recovery 更正：调查微塑料（5-500 微米）形态特征与其分析回收率之间的相关性

Microplastics and nanoplastics Pub Date : 2023-11-27 DOI: 10.1186/s43591-023-00075-1

O. Hagelskjar, A. Crézé, G. Le Roux, J. E. Sonke

引用次数: 0

Evaluating the effectiveness of the MicroPlastic Sediment Separator (MPSS) 评估微塑料沉积物分离器（MPSS）的效果

Microplastics and nanoplastics Pub Date : 2023-11-22 DOI: 10.1186/s43591-023-00073-3

J. Prume, Hannes Laermanns, Martin G. J. Löder, Christian Laforsch, Christina Bogner, Martin Koch

引用次数: 0

Legacy oceanic plastic pollution must be addressed to mitigate possible long-term ecological impacts 必须解决遗留的海洋塑料污染，以减轻可能产生的长期生态影响

Microplastics and nanoplastics Pub Date : 2023-11-13 DOI: 10.1186/s43591-023-00074-2

Camille Richon, Karin Kvale, Laurent Lebreton, Matthias Egger

{"title":"Legacy oceanic plastic pollution must be addressed to mitigate possible long-term ecological impacts","authors":"Camille Richon, Karin Kvale, Laurent Lebreton, Matthias Egger","doi":"10.1186/s43591-023-00074-2","DOIUrl":"https://doi.org/10.1186/s43591-023-00074-2","url":null,"abstract":"Abstract Scientific research over the past decade has demonstrated that plastic in our oceans has detrimental consequences for marine life at all trophic levels. As countries negotiate an international legally binding instrument on plastic pollution, the focus is on eliminating plastic emissions to the environment. Here, we argue that, while this endeavour is urgently needed to limit the negative impacts of plastic on ocean ecosystems, the reduction of the plastic flow to the environment should not be the sole purpose of the negotiations. Legacy oceanic plastic pollution is also a major concern that needs to be addressed in the coming Treaty. Plastic is ubiquitous and persistent in the environment, and its slow degradation produces uncountable amounts of potentially even more impactful micro- and nanoparticles. Thus, plastic that is already present in the oceans may continue to affect ecosystems for centuries. Recent global assessments reveal that microplastics could have a significant impact on biogeochemical cycles and microbial food chains within ocean ecosystems that may be equivalent to those of climate change. Therefore, we argue that cleanup initiatives are essential to avoid further longterm impacts of legacy oceanic pollution. The upcoming international negotiations to develop a new Global Plastics Treaty should aim at urgently reducing the flow of plastic to the marine environment while supporting innovative solutions towards efficient monitoring and cleanup of the legacy oceanic plastic pollution.","PeriodicalId":74190,"journal":{"name":"Microplastics and nanoplastics","volume":"56 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136346876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Validation of the Microplastic Index—Two Approaches to Understanding Microplastic Formation 微塑性指数的实验验证——理解微塑性形成的两种方法

Microplastics and nanoplastics Pub Date : 2023-11-03 DOI: 10.3390/microplastics2040027

Kalouda Grigoriadi, Merel G. A. Nooijens, Ali Emre Taşli, Max M. C. Vanhouttem, Sieger Henke, Luke A. Parker, Jan Harm Urbanus, Arjen Boersma

{"title":"Experimental Validation of the Microplastic Index—Two Approaches to Understanding Microplastic Formation","authors":"Kalouda Grigoriadi, Merel G. A. Nooijens, Ali Emre Taşli, Max M. C. Vanhouttem, Sieger Henke, Luke A. Parker, Jan Harm Urbanus, Arjen Boersma","doi":"10.3390/microplastics2040027","DOIUrl":"https://doi.org/10.3390/microplastics2040027","url":null,"abstract":"The Microplastic Index (MPI) was presented in a previous paper as a method to assess the formation of microplastics during the application of impact and wear stresses, based on selected mechanical and physical properties of polymers. In this paper, the experimental validation of the MPI model is presented. A series of ten polymers was characterized to obtain the relevant parameters for the calculation of the MPI, i.e., the minimum particle size and volume of microplastics formed. The milling (addressing impact stress) and sanding experiments (addressing wear stress) resulted in particle sizes between 3 and 200 μm and 0.3 and 25 μm, respectively. These values were very well predicted by the MPI model, showing smaller particles for brittle polymers and larger ones for ductile polymers. In addition, the experimental-specific wear rates of impact and wear correlated well with the predicted ones, being 0.01–30 mm3/Nm for impact and 0.0002–0.012 mm3/Nm for wear. These results indicate that the MPI can be very well used to predict the tendency of a material to form microplastics. In the search for understanding and mitigating microplastic formation, the MPI can be used by both producers and end users to choose plastic grades that form fewer microplastics.","PeriodicalId":74190,"journal":{"name":"Microplastics and nanoplastics","volume":"9 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135819066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fast Forward: Optimized Sample Preparation and Fluorescent Staining for Microplastic Detection 快进:微塑料检测的优化样品制备和荧光染色

Microplastics and nanoplastics Pub Date : 2023-10-22 DOI: 10.3390/microplastics2040026

Michael Toni Sturm, Erika Myers, Anika Korzin, Sabrina Polierer, Dennis Schober, Katrin Schuhen

{"title":"Fast Forward: Optimized Sample Preparation and Fluorescent Staining for Microplastic Detection","authors":"Michael Toni Sturm, Erika Myers, Anika Korzin, Sabrina Polierer, Dennis Schober, Katrin Schuhen","doi":"10.3390/microplastics2040026","DOIUrl":"https://doi.org/10.3390/microplastics2040026","url":null,"abstract":"The fast, affordable, and standardized detection of microplastics (MP) remains one of the biggest challenges in MP research. Comparable data are essential for appropriate risk assessments and the implementation of laws and limit values. The fluorescent staining of MP in environmental samples is a possible solution to this problem. This study investigates the optimization of a sample preparation process (hydrogen peroxide digestion) and the staining process (temperature, concentration, time, surfactants as staining aids) for using a specifically developed fluorescent dye for MP detection. The optimization is performed by comparing the sample preparation process and staining of MP from different polymers and natural particles. Further, the suitability of the optimized process for the detection of fluoropolymers and tire abrasion was tested. The results show that the optimized method (increased temperature and optimized stain concentration) can detect microplastics reliably with a total sample preparation and measurement time of 2.5–3 h per sample, reaching recovery rates of 93.3% (polypropylene) to 101.7% (polyester). Moreover, two of the three tested fluoropolymers could be detected reliably. Tire abrasion could not be detected with the here presented method, as the black color leads to strong quenching. A long-term study measuring the MP pollution in the effluent of a municipal wastewater treatment plant compared the optimized and original processes and confirmed the stability of the improved method for routine measurements and contamination control.","PeriodicalId":74190,"journal":{"name":"Microplastics and nanoplastics","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135462031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparing Methods for Microplastic Quantification Using the Danube as a Model 以多瑙河为模型的微塑性定量方法比较

Microplastics and nanoplastics Pub Date : 2023-10-17 DOI: 10.3390/microplastics2040025

Tim Kiefer, Martin Knoll, Andreas Fath

引用次数: 0