Microplastics and nanoplastics最新文献_第9页

Effects of Silica Fume and Micro Silica on the Properties of Mortars Containing Waste PVC Plastic Fibers 硅粉和微二氧化硅对含废PVC塑料纤维砂浆性能的影响

Microplastics and nanoplastics Pub Date : 2022-10-07 DOI: 10.3390/microplastics1040041

R. Mahmood, N. Kockal

{"title":"Effects of Silica Fume and Micro Silica on the Properties of Mortars Containing Waste PVC Plastic Fibers","authors":"R. Mahmood, N. Kockal","doi":"10.3390/microplastics1040041","DOIUrl":"https://doi.org/10.3390/microplastics1040041","url":null,"abstract":"Investigations on the usability of waste plastics as a new generation of construction materials have become one of the main concerns of researchers and engineers in recent decades. Waste plastics can be used either as aggregate replacement or as fiber reinforcement to enhance the properties of cementitious mixtures. This study focuses on the properties of waste PVC fiber-reinforced mortars containing silica fume and micro silica. Plastic fibers were added to the mortar mixes by volume fractions of 0%, 1%, 2%, and 3%. Cement was replaced by micro silica and silica fume by 5%, 10%, and 15% by weight of cement, respectively. In total, 28 different groups of mortars were produced. The results showed an enhanced ductility and deformation behavior of mortars upon the addition of waste PVC plastic fibers. It can be seen that fibers restricted crack propagation and maintained integrity, hence improving the ductility of the mortars. On the other hand, the addition of fibers led to a reduction in the physical and mechanical properties of the mortar samples. The compressive strength of the mortar samples decreased gradually by increasing the fiber content. Cement replacement by silica fume improved mechanical and microstructural properties of the mortars. The results also demonstrated that silica fume significantly decreased the porosity and water absorption capacity of mortar samples.","PeriodicalId":74190,"journal":{"name":"Microplastics and nanoplastics","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90048303","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: 3

Detection and Analysis of Microfibers and Microplastics in Wastewater from a Textile Company 某纺织企业废水中微纤维和微塑料的检测与分析

Microplastics and nanoplastics Pub Date : 2022-10-03 DOI: 10.3390/microplastics1040040

Sinem Hazal Akyildiz, R. Bellopede, H. Sezgin, I. Yalcin-Enis, B. Yalçın, S. Fiore

{"title":"Detection and Analysis of Microfibers and Microplastics in Wastewater from a Textile Company","authors":"Sinem Hazal Akyildiz, R. Bellopede, H. Sezgin, I. Yalcin-Enis, B. Yalçın, S. Fiore","doi":"10.3390/microplastics1040040","DOIUrl":"https://doi.org/10.3390/microplastics1040040","url":null,"abstract":"Textile wastewater is polluted by inorganic/organic substances, polymers, dyes, and microfibers (MFs), which are microplastics (MPs) and natural fibers. This work is aimed at the preliminary investigation of MFs and MPs in textile industrial wastewater, and at evaluating the removal efficiency of an on-site wastewater treatment plant (WWTP). Ten samples of inflows and outflows of the WWTP of a textile company (applying a physic-chemical process) have been analyzed. Firstly, the samples underwent a pretreatment with 15% hydrogen peroxide at 25 °C for 5 days to remove organic compounds. Secondly, the MFs were recovered from the aqueous phase by pre-screening centrifugation, density separation, and filtration as alternative options. Filtration obtained the best performances, compared to the other recovery processes. Thirdly, the MFs were counted through optical microscopy and the MPs were identified through micro-FTIR. The MFs amount in the inflow samples was in the range of 893–4452 MFs/L. The outflow samples (310–2404 MFs/L) exhibited a 38–65% reduction compared to the inflows, demonstrating that up to 62% of residual MFs can enter the sewer network or the receiving water body. Cotton and wool, and numerous MPs (acrylic, polyester, polypropylene, polyamide, and viscose/rayon) were identified in the inflow and outflow samples (with the only exception of “dense” viscose (rayon), not detected in the outflows, and probably retained by the WWTP with the sludge). This study, even if just preliminary, offers interesting hints for future research on MFs/MPs detection in textile wastewater, and on the performance of a full-scale WWT process for their removal.","PeriodicalId":74190,"journal":{"name":"Microplastics and nanoplastics","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85183905","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: 5

Microplastics in Namibian river sediments – a first evaluation 纳米比亚河流沉积物中的微塑料——首次评估

Microplastics and nanoplastics Pub Date : 2022-09-27 DOI: 10.1186/s43591-022-00043-1

L. Faulstich, J. Prume, R. Arendt, Christian Reinhardt-Imjela, P. Chifflard, A. Schulte

引用次数: 8

Quantifying the fragmentation of polypropylene upon exposure to accelerated weathering 聚丙烯在加速风化作用下破碎的定量分析

Microplastics and nanoplastics Pub Date : 2022-09-21 DOI: 10.1186/s43591-022-00042-2

Nora Meides, Anika Mauel, Teresa Menzel, V. Altstädt, H. Ruckdäschel, J. Senker, P. Strohriegl

引用次数: 14

Understanding microplastic pollution in the Nordic marine environment – knowledge gaps and suggested approaches 了解北欧海洋环境中的微塑料污染——知识差距和建议的方法

Microplastics and nanoplastics Pub Date : 2022-09-11 DOI: 10.1186/s43591-022-00041-3

Sophie Jensen, B. E. Grøsvik, C. Halsband, H. Halldórsson, H. Leslie, H. Gunnlaugsdottir, Hermann Dreki Guls, K. Vorkamp, M. Granberg, Valtýr Sigurðsson, H. Jörundsdóttir

引用次数: 0

Marine Litter Impact on Sandy Beach Fauna: A Review to Obtain an Indication of Where Research Should Contribute More 海洋垃圾对沙滩动物的影响:研究方向的综述

Microplastics and nanoplastics Pub Date : 2022-09-09 DOI: 10.3390/microplastics1030039

L. L. Costa, L. Fanini, Mohamed Ben-Haddad, Maurizio Pinna, I. Zalmon

{"title":"Marine Litter Impact on Sandy Beach Fauna: A Review to Obtain an Indication of Where Research Should Contribute More","authors":"L. L. Costa, L. Fanini, Mohamed Ben-Haddad, Maurizio Pinna, I. Zalmon","doi":"10.3390/microplastics1030039","DOIUrl":"https://doi.org/10.3390/microplastics1030039","url":null,"abstract":"In order to identify how research contributes to the knowledge of marine litter as a pressure on beaches, we reviewed interactions of beach fauna with this pollutant. Entanglement of pinnipeds in fishing gear, negative correlations between macroinvertebrates abundance and sediment pollution, and the presence of plastic surrounding burrows were primary evidence of beach fauna interacting with stranded litter. Ingestion represents the main body of research; microplastic uptake by invertebrates has been studied by laboratory experiments and field collections to report the presence of polymers in tissues. In the natural context, the higher the urbanization surrounding beaches and sediment pollution, the higher the concentration of microplastics in organs of bivalves. This approach currently constitutes the main research direction, but ecotoxicological assays are emerging prospects to assess the effects of exposure to microplastics. Beached macroplastics entangle and entrap invertebrates and vertebrates, and studies have reported increasing negative interactions with seals and sea turtles. Changes in nesting and feeding behavior of resident and transient organisms have been shown as typical early warning indicators of marine litter impacts. The focus on fauna–litter interactions holds terrific potential for research and citizen science projects, which finally becomes a powerful driver towards environmental awareness on sandy beaches.","PeriodicalId":74190,"journal":{"name":"Microplastics and nanoplastics","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76727767","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: 16

Interaction between Microplastics and Pharmaceuticals Depending on the Composition of Aquatic Environment 基于水环境组成的微塑料与药物相互作用

Microplastics and nanoplastics Pub Date : 2022-09-05 DOI: 10.3390/microplastics1030037

M. Kļaviņš, L. Klavins, O. Stabnikova, V. Stabnikov, A. Marynin, L. Ansone-Bērtiņa, Marcis Mezulis, Ashok Vaseashta

{"title":"Interaction between Microplastics and Pharmaceuticals Depending on the Composition of Aquatic Environment","authors":"M. Kļaviņš, L. Klavins, O. Stabnikova, V. Stabnikov, A. Marynin, L. Ansone-Bērtiņa, Marcis Mezulis, Ashok Vaseashta","doi":"10.3390/microplastics1030037","DOIUrl":"https://doi.org/10.3390/microplastics1030037","url":null,"abstract":"A large amount of the globally produced plastics are not treated and are eventually released into landfills or natural environments, including surface waters. The plastics that enter the aquatic environment are very often microplastics, which are produced in households by the slow degradation or abrasion of plastic products, or as whole plastic products, which eventually degrade (abrasion, photodegradation). Together with microplastics, other pollutants such as pharmaceuticals of various kinds enter surface waters—both of these counterparts can interact with each other as well as with organic and inorganic molecules available in the natural environment. The aim of this study was to identify the interaction of microplastics with pharmaceuticals, especially under conditions that are common in inland waters as well as the seas and oceans that the rivers feed their water into. It was found that salinity has a great impact on the sorption capacity of microplastics and pharmaceuticals. The sorption of naturally occurring humic substances (humic and fulvic acids) can greatly increase when the microplastic–pharmaceutical complex is formed; however, the priority of the interaction happens with pharmaceuticals and humic substances. Such complexes can influence the organisms that feed on small organic-matter particles, as they can be mistaken for food and thus be transferred throughout the food chain.","PeriodicalId":74190,"journal":{"name":"Microplastics and nanoplastics","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87337929","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: 10

Assessing Microplastic Prevalence and Dispersion from Saigon Urban Canals via Can Gio Mangrove Reserve to East Sea by Raman Scattering Microscopy 利用拉曼散射显微镜研究西贡城市运河经芹桥红树林保护区至东海的微塑料流行和扩散

Microplastics and nanoplastics Pub Date : 2022-09-05 DOI: 10.3390/microplastics1030038

Vo Thi Kim Khuyen, Dinh-Vu Le, H. Le, A. Fischer, C. Dornack

{"title":"Assessing Microplastic Prevalence and Dispersion from Saigon Urban Canals via Can Gio Mangrove Reserve to East Sea by Raman Scattering Microscopy","authors":"Vo Thi Kim Khuyen, Dinh-Vu Le, H. Le, A. Fischer, C. Dornack","doi":"10.3390/microplastics1030038","DOIUrl":"https://doi.org/10.3390/microplastics1030038","url":null,"abstract":"Plastic pollution is one of the significant environmental concerns due to the threefold increase in global plastic waste. Marine microplastics, including petroleum-based plastic pieces and synthetic and artificial fibers smaller than 5 mm, are not only ubiquitous in natural water but also high in wastewater streams due to the direct discharge, transfer and breakdown of plastic items. This research aims to investigate the presence and dispersion of microplastics in the downtown area and coastal suburban area of Ho-Chi-Minh City by using Raman microscopy. As a result, the most common plastics (PE, PET, PA, PP, PVC, PS and PMMA) were detected, and most of them were fibrous shorter than 500 μm. The total microplastics decreased gradually from the urban waterborne (up to 220 MPs/L) via Can Gio UNESCO Mangrove Biosphere Reserve (10 MPs/L) and to the East Sea (3 MPs/L), which reveals the potential role of the mangrove in reducing marine contaminants including microplastics. This study provides important insights into microplastic pollution in the Western Pacific Region, especially the Saigon-Dong Nai river systems, supporting useful data for natural water resources management.","PeriodicalId":74190,"journal":{"name":"Microplastics and nanoplastics","volume":"94 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76837944","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: 3

Polystyrene Microplastics Modulate the Toxicity of the Hydrophilic Insecticide Thiacloprid for Chironomid Larvae and Also Influence Their Burrowing Behavior 聚苯乙烯微塑料调节亲水性杀虫剂噻虫啉对手蛾幼虫的毒性并影响其挖洞行为

Microplastics and nanoplastics Pub Date : 2022-09-04 DOI: 10.3390/microplastics1030036

Stefanie Krais, N. Anthes, S. Huppertsberg, T. Knepper, Katharina Peschke, A. S. Ruhl, Hannah Schmieg, Tabea Schwarz, H. Köhler, R. Triebskorn

{"title":"Polystyrene Microplastics Modulate the Toxicity of the Hydrophilic Insecticide Thiacloprid for Chironomid Larvae and Also Influence Their Burrowing Behavior","authors":"Stefanie Krais, N. Anthes, S. Huppertsberg, T. Knepper, Katharina Peschke, A. S. Ruhl, Hannah Schmieg, Tabea Schwarz, H. Köhler, R. Triebskorn","doi":"10.3390/microplastics1030036","DOIUrl":"https://doi.org/10.3390/microplastics1030036","url":null,"abstract":"As there is still little knowledge of interactions between microplastics (MP) and hydrophilic compounds, we propose ways the toxicity of hydrophilic pesticides can be modulated by MP, when sorption can be excluded. Larvae of Chironomus riparius were exposed to thiacloprid (TH, 1 µg/L) and polystyrene microplastic particles (PS; <50 µm; 150,000 and 1,000,000 particles/L) for 96 h, solely or in co-exposure. Burrowing behavior and mortality were observed. Larvae in treatments containing PS established themselves quicker in the sediment and kept the ability to rebury for a longer time compared to control and TH, respectively. While TH elevated the mortality, exposure to PS alone did not affect the survival of the larvae. In co-exposure of TH and PS, a concentration of 150,000 particles/L significantly reduced the toxicity of 1 µg/L TH after 96 h, an effect that was not observed at 1,000,000 particles/L. Therefore, we hypothesize that this modulation of the toxicity of TH eventually may have resulted from a combination of a ‘protective MP layer’ in the gut and a higher retention time of particles in larvae exposed to 150,000 particles/L than in those exposed to 1,000,000 particles/L due to the lower number of ingestible particles in the former.","PeriodicalId":74190,"journal":{"name":"Microplastics and nanoplastics","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86736425","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: 2

Assessment of Polyester Fabrics, Effluents and Filtrates after Standard and Innovative Washing Processes 标准和创新洗涤过程后聚酯织物、流出物和滤液的评估

Microplastics and nanoplastics Pub Date : 2022-09-02 DOI: 10.3390/microplastics1030035

T. Pušić, B. Vojnović, M. Čurlin, Ivica Bekavac, T. Kaurin, K. Grgić, Kristina Šimić, Z. Kovačević

{"title":"Assessment of Polyester Fabrics, Effluents and Filtrates after Standard and Innovative Washing Processes","authors":"T. Pušić, B. Vojnović, M. Čurlin, Ivica Bekavac, T. Kaurin, K. Grgić, Kristina Šimić, Z. Kovačević","doi":"10.3390/microplastics1030035","DOIUrl":"https://doi.org/10.3390/microplastics1030035","url":null,"abstract":"Textile materials from polyester fibres are sensitive to washing, especially at higher temperatures, due to their thermoplastic properties, hydrophobic nature and sensitivity to the alkaline medium. The issue of microplastic fibres’ (MFs’) release from polyester textiles is a topic that attracts the attention of researchers from different scientific fields, since microplastics are now among the serious environmental risks. In this study, two washing protocols, a standard and an innovative procedure, were presented, aiming to preserve the properties of polyester fabrics and reduce the pollution of washing effluents. The standard procedure followed HRN EN ISO 6330, while the innovative procedure was a modification of the standard that involved gradually cooling the bath before rinsing. The effects of these washing protocols were studied based on the physicochemical properties of the fabrics compared to the unwashed material, the composition of the effluents, and the filtrates after 10 cycles. The characterisation parameters of the fabrics, effluents and filtrates according to the standard and the innovative washing protocols showed differences in the observed parameters during the 10 washing cycles. The obtained results show the usefulness of the proposed concept of cooling the bath before rinsing in order to preserve the properties of polyester fabrics and reduce the load of washing effluents. Hierarchical cluster analysis (HCA) also confirmed differences in pH, conductivity and turbidity for effluents and filtrates from standard and innovative washing protocols.","PeriodicalId":74190,"journal":{"name":"Microplastics and nanoplastics","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82190788","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