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Nanocomposite UF membrane of PVC/nano-silica modified with SDS for carwash wastewater treatment
IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-12-04 DOI: 10.1039/D4VA00088A
Eman S. A. Al-Sammarraie, T. M. Sabirova, Hicham Meskher, Raed A. Al-Juboori, Grigory V. Zyryanov and Qusay F. Alsalhy

This study presents an investigation of a novel fouling-resistant mixed matrix membrane (MMM) composed of ultrafiltration PVC incorporating silica nanoparticles modified with sodium dodecyl sulfate (SiO2-SDS) for carwash wastewater treatment. The hydrophilic SiO2-SDS was synthesized by modifying SDS molecules onto the surfaces of silica nanoparticles (SiO2 NPs). Later, SiO2-SDS NPs were incorporated into a PVC polymeric matrix at an optimized ratio. The prepared virgin membrane and MMMs were characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy-energy dispersive X-ray (SEM-EDX) spectroscopy, and atomic force microscopy (AFM). The results revealed that MMMs prepared with 0.15 wt% SiO2-SDS NPs exhibited optimum characteristics and performance, where the highest thickness of 118.71 ± 0.42 μm and maximum porosity of 81.40 ± 0.23% were obtained. The pure water flux of this membrane reached 127.75 ± 1.72 L m−2 h−1, which is better than that of other modified membranes. This membrane achieved high removal of total suspended solids and chemical oxygen demand of 93% and 78%, respectively, when used with real carwash wastewater. Additionally, the 0.15 wt% SiO2-SDS NPs exhibited stable performance during prolonged operation, resulting in the best flux recovery ratio of 80% among other tested membranes, signifying its superior fouling resistance bestowed by the hydrophilic nature of the incorporated SiO2-SDS NPs.

{"title":"Nanocomposite UF membrane of PVC/nano-silica modified with SDS for carwash wastewater treatment","authors":"Eman S. A. Al-Sammarraie, T. M. Sabirova, Hicham Meskher, Raed A. Al-Juboori, Grigory V. Zyryanov and Qusay F. Alsalhy","doi":"10.1039/D4VA00088A","DOIUrl":"https://doi.org/10.1039/D4VA00088A","url":null,"abstract":"<p >This study presents an investigation of a novel fouling-resistant mixed matrix membrane (MMM) composed of ultrafiltration PVC incorporating silica nanoparticles modified with sodium dodecyl sulfate (SiO<small><sub>2</sub></small>-SDS) for carwash wastewater treatment. The hydrophilic SiO<small><sub>2</sub></small>-SDS was synthesized by modifying SDS molecules onto the surfaces of silica nanoparticles (SiO<small><sub>2</sub></small> NPs). Later, SiO<small><sub>2</sub></small>-SDS NPs were incorporated into a PVC polymeric matrix at an optimized ratio. The prepared virgin membrane and MMMs were characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy-energy dispersive X-ray (SEM-EDX) spectroscopy, and atomic force microscopy (AFM). The results revealed that MMMs prepared with 0.15 wt% SiO<small><sub>2</sub></small>-SDS NPs exhibited optimum characteristics and performance, where the highest thickness of 118.71 ± 0.42 μm and maximum porosity of 81.40 ± 0.23% were obtained. The pure water flux of this membrane reached 127.75 ± 1.72 L m<small><sup>−2</sup></small> h<small><sup>−1</sup></small>, which is better than that of other modified membranes. This membrane achieved high removal of total suspended solids and chemical oxygen demand of 93% and 78%, respectively, when used with real carwash wastewater. Additionally, the 0.15 wt% SiO<small><sub>2</sub></small>-SDS NPs exhibited stable performance during prolonged operation, resulting in the best flux recovery ratio of 80% among other tested membranes, signifying its superior fouling resistance bestowed by the hydrophilic nature of the incorporated SiO<small><sub>2</sub></small>-SDS NPs.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":" 3","pages":" 469-488"},"PeriodicalIF":3.5,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/va/d4va00088a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535709","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
Facile detection of microplastics from a variety of environmental samples with conjugated polymer nanoparticles†
IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-12-03 DOI: 10.1039/D4VA00239C
Angela Awada, Mark Potter, Julian Aherne, Sarah Lavoie-Bernstein, Miriam L. Diamond, Paul A. Helm, Liisa Jantunen, Brittany Welsh, Bulent Mutus and Simon Rondeau-Gagné

Microplastic pollution constitutes a pressing global environmental issue impacting nearly every facet of human activity. This specific environmental challenge exerts profound yet still poorly understood influences on health, social dynamics, and industrial practices. A major obstacle for further investigation and mitigation of microplastics lies in their heterogeneity in size and composition. Additionally, the multitude of sources contributing to microplastic emissions further complicates their study. To enhance current detection and analytical methodologies for microplastics, this study exploits a novel approach for the easy and specific identification of microplastics within diverse environmental samples (including air, soil, lake water, rain, snow, and marine sediment) collected from various geographical locations across Canada. This method relies on fluorescent conjugated polymer nanoparticles that can be used to identify microplastics after minimal preparation. In all examined samples, originating from diverse sources and environments, microplastics were consistently present in the form of fragments and/or fibers, with polyethylene terephthalate (PET) emerging as the most abundant type, as confirmed via Raman spectroscopy either before or after labeling. This approach significantly streamlines the microplastic identification process, reducing the time needed for extraction and isolation. Our findings corroborate the efficacy of nanoparticle labeling for microplastic detection, offering promising avenues for their facile, specific, and reliable identification. Ultimately, this novel procedure holds potential to enhance remediation efforts targeting microplastics in the environment, thereby advancing our understanding of their global impact.

{"title":"Facile detection of microplastics from a variety of environmental samples with conjugated polymer nanoparticles†","authors":"Angela Awada, Mark Potter, Julian Aherne, Sarah Lavoie-Bernstein, Miriam L. Diamond, Paul A. Helm, Liisa Jantunen, Brittany Welsh, Bulent Mutus and Simon Rondeau-Gagné","doi":"10.1039/D4VA00239C","DOIUrl":"https://doi.org/10.1039/D4VA00239C","url":null,"abstract":"<p >Microplastic pollution constitutes a pressing global environmental issue impacting nearly every facet of human activity. This specific environmental challenge exerts profound yet still poorly understood influences on health, social dynamics, and industrial practices. A major obstacle for further investigation and mitigation of microplastics lies in their heterogeneity in size and composition. Additionally, the multitude of sources contributing to microplastic emissions further complicates their study. To enhance current detection and analytical methodologies for microplastics, this study exploits a novel approach for the easy and specific identification of microplastics within diverse environmental samples (including air, soil, lake water, rain, snow, and marine sediment) collected from various geographical locations across Canada. This method relies on fluorescent conjugated polymer nanoparticles that can be used to identify microplastics after minimal preparation. In all examined samples, originating from diverse sources and environments, microplastics were consistently present in the form of fragments and/or fibers, with polyethylene terephthalate (PET) emerging as the most abundant type, as confirmed <em>via</em> Raman spectroscopy either before or after labeling. This approach significantly streamlines the microplastic identification process, reducing the time needed for extraction and isolation. Our findings corroborate the efficacy of nanoparticle labeling for microplastic detection, offering promising avenues for their facile, specific, and reliable identification. Ultimately, this novel procedure holds potential to enhance remediation efforts targeting microplastics in the environment, thereby advancing our understanding of their global impact.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":" 2","pages":" 270-278"},"PeriodicalIF":3.5,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/va/d4va00239c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107388","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
Wastewater-induced microplastic biofouling in freshwater: role of particle size and flow velocity† 淡水中废水引起的微塑料生物污染:粒径和流速的作用
IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-28 DOI: 10.1039/D4VA00303A
Gaurav Bhardwaj, Malihe Mohammadiun, Carlos Saul Osorio Gonzalez, Satinder Kaur Brar and Shooka Karimpour

Microplastics (MPs), discharged from wastewater treatment plants (WWTPs), are found abundantly in freshwater systems. Along with MPs, various microorganisms that evade WWTP disinfection may colonize these particles, leading to biofouling. This study assessed the performance of six bacterial strains isolated from wastewater and the factors influencing biofilm formation using synthetic freshwater and polyethylene (PE) microplastics as a model. The effect of two PE microplastic sizes (180–200 μm and 3–4 mm) and three flow velocities (0.238, 0.11, and 0.077 m s−1) were tested on the isolated strains' microbial growth and biofilm formation. Smaller MPs notably enhanced the growth rate. The treatment with small PE microplastics and a low flow velocity promoted the biofilm formation compared to a higher flow velocity where rapid microbial growth was observed but showed a lower biofilm formation after seven days of cultivation. These findings reveal how MP size and flow velocities influence biofilm development, advancing the understanding of MP-microbial interactions in freshwater aquatic environments.

从污水处理厂排放的微塑料(MPs)在淡水系统中大量存在。与MPs一起,逃避污水处理厂消毒的各种微生物可能在这些颗粒上定植,导致生物污染。本研究以合成淡水和聚乙烯(PE)微塑料为模型,评估了从废水中分离的6株细菌的性能及影响生物膜形成的因素。研究了2种PE微塑料尺寸(180 ~ 200 μm和3 ~ 4 mm)和3种流速(0.238、0.11和0.077 m s−1)对分离菌株微生物生长和生物膜形成的影响。较小的国会议员显著提高了增长率。小PE微塑料和低流速处理促进了生物膜的形成,相比之下,高流速下微生物生长迅速,但培养7天后生物膜的形成较低。这些发现揭示了MP大小和流速如何影响生物膜的发育,促进了对淡水水生环境中MP-微生物相互作用的理解。
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引用次数: 0
Treated wastewater reuse for crop irrigation: a comprehensive health risk assessment†
IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-25 DOI: 10.1039/D4VA00274A
Solomon Ofori, Ylenia Di Leto, Štěpánka Smrčková, Marco Antonio Lopez Marin, Giuseppe Gallo, Iveta Růžičková and Jiří Wanner

The use of treated effluent/wastewater (TWW) for crop irrigation is gaining prominence globally due to growing freshwater scarcity. However, there are still questions about the safety of such a practice. This study sought to investigate and evaluate the health risks associated with the use of TWW for crop irrigation by assessing the potential risks arising from pathogens, heavy metals/potentially toxic elements (PTEs), micropollutants or pharmaceuticals and antibiotic resistance genes (ARGs), using tomato, carrot and cabbage as test crops. The levels of copper bioaccumulated in TWW irrigated crops were 25 mg kg−1 for tomato, 30 mg kg−1 for carrot and 20 mg kg−1 for cabbage, while those of the control (tap water) were 30 mg kg−1 for tomato, 40 mg kg−1 for carrot and 65 mg kg−1 for cabbage, respectively. Arsenic, cadmium and lead levels were below the detection limit for all treatments. The hazard quotient (HQ) and hazard index (HI) of copper and zinc were below 1 (adults) for TWW irrigated crops. Escherichia coli, Clostridium perfringens, coliform and thermotolerant bacteria were not detected on the fruits of tomato plants irrigated with TWW. All analysed pharmaceuticals were below the limit of detection except gabapentin, which was 3 μg kg−1 in TWW irrigated tomatoes. tetA, ermB, blaTEM, sul2, sul3 and qnrS genes were found in the metagenomic DNA extracted from TWW- and tap-irrigated cabbage. The results indicate no potential non-carcinogenic health risk for adult consumers and no microbial contamination of the tomato fruits under TWW irrigation. No difference was observed in the presence and distribution of the ARGs between TWW- and tap-irrigated crops, suggesting no contribution to the diffusion of different ARGs due to irrigation. Altogether, these findings highlight that health risk assessment of TWW for crop irrigation should focus on the quality of the TWW and on soil characteristics, which may contribute to risk exposure of different types of contaminants.

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引用次数: 0
Monitoring wind and particle concentrations near freshwater and marine harmful algal blooms (HABs)†
IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-22 DOI: 10.1039/D4VA00172A
Landon Bilyeu, Javier González-Rocha, Regina Hanlon, Noora AlAmiri, Hosein Foroutan, Kun Alading, Shane D. Ross and David G. Schmale

Harmful algal blooms (HABs) are a threat to aquatic ecosystems worldwide. New information is needed about the environmental conditions associated with the aerosolization and transport of HAB cells and their associated toxins. This information is critical to help inform our understanding of potential exposures. We used a ground-based sensor package to monitor weather, measure airborne particles, and collect air samples on the shore of a freshwater HAB (bloom of predominantly Rhaphidiopsis, Lake Anna, Virginia) and a marine HAB (bloom of Karenia brevis, Gulf Coast, Florida). Each sensor package contained a sonic anemometer, impinger, and optical particle counter. A drone was used to measure vertical profiles of windspeed and wind direction at the shore and above the freshwater HAB. At the Florida sites, airborne particle number concentrations (cm−3) increased throughout the day and the wind direction (offshore versus onshore) was strongly associated with these particle number concentrations (cm−3). Offshore wind sources had particle number concentrations (cm−3) 3 to 4 times higher than those of onshore wind sources. A predictive model, trained on a random set of weather and particle number concentrations (cm−3) collected over the same time period, was able to predict airborne particle number concentrations (cm−3) with an R squared value of 0.581 for the freshwater HAB in Virginia and an R squared value of 0.804 for the marine HAB in Florida. The drone-based vertical profiles of the wind velocity showed differences in wind speed and direction at different altitudes, highlighting the need for wind measurements at multiple heights to capture environmental conditions driving the atmospheric transport of aerosolized HAB toxins. A surface flux equation was used to determine the rate of aerosol production at the beach sites based on the measured particle number concentrations (cm−3) and weather conditions. Additional work is needed to better understand the short-term fate and transport of aerosolized cyanobacterial cells and toxins and how this is influenced by local weather conditions.

{"title":"Monitoring wind and particle concentrations near freshwater and marine harmful algal blooms (HABs)†","authors":"Landon Bilyeu, Javier González-Rocha, Regina Hanlon, Noora AlAmiri, Hosein Foroutan, Kun Alading, Shane D. Ross and David G. Schmale","doi":"10.1039/D4VA00172A","DOIUrl":"https://doi.org/10.1039/D4VA00172A","url":null,"abstract":"<p >Harmful algal blooms (HABs) are a threat to aquatic ecosystems worldwide. New information is needed about the environmental conditions associated with the aerosolization and transport of HAB cells and their associated toxins. This information is critical to help inform our understanding of potential exposures. We used a ground-based sensor package to monitor weather, measure airborne particles, and collect air samples on the shore of a freshwater HAB (bloom of predominantly <em>Rhaphidiopsis</em>, Lake Anna, Virginia) and a marine HAB (bloom of <em>Karenia brevis</em>, Gulf Coast, Florida). Each sensor package contained a sonic anemometer, impinger, and optical particle counter. A drone was used to measure vertical profiles of windspeed and wind direction at the shore and above the freshwater HAB. At the Florida sites, airborne particle number concentrations (cm<small><sup>−3</sup></small>) increased throughout the day and the wind direction (offshore <em>versus</em> onshore) was strongly associated with these particle number concentrations (cm<small><sup>−3</sup></small>). Offshore wind sources had particle number concentrations (cm<small><sup>−3</sup></small>) 3 to 4 times higher than those of onshore wind sources. A predictive model, trained on a random set of weather and particle number concentrations (cm<small><sup>−3</sup></small>) collected over the same time period, was able to predict airborne particle number concentrations (cm<small><sup>−3</sup></small>) with an <em>R</em> squared value of 0.581 for the freshwater HAB in Virginia and an <em>R</em> squared value of 0.804 for the marine HAB in Florida. The drone-based vertical profiles of the wind velocity showed differences in wind speed and direction at different altitudes, highlighting the need for wind measurements at multiple heights to capture environmental conditions driving the atmospheric transport of aerosolized HAB toxins. A surface flux equation was used to determine the rate of aerosol production at the beach sites based on the measured particle number concentrations (cm<small><sup>−3</sup></small>) and weather conditions. Additional work is needed to better understand the short-term fate and transport of aerosolized cyanobacterial cells and toxins and how this is influenced by local weather conditions.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":" 2","pages":" 279-291"},"PeriodicalIF":3.5,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/va/d4va00172a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107389","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
Innovative approaches to sustainable wastewater treatment: a comprehensive exploration of conventional and emerging technologies
IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-22 DOI: 10.1039/D4VA00136B
Jaweria Shamshad and Rashid Ur Rehman

Access to clean water is under threat due to population growth, climate change, and pollution, emphasizing the need for effective wastewater treatment. Wastewater pollutants pose risks to public health and ecosystems, necessitating proper treatment methods. This paper outlines both conventional and emerging technologies for wastewater treatment. Established techniques, such as activated sludge processing, chlorination, and constructed wetlands, are discussed alongside newer methods, such as advanced oxidation, ultraviolet disinfection, membrane bioreactors, reverse osmosis, artificial intelligence optimization, and nanofiltration, which enhance contaminant removal but may incur high costs and energy demands. Integration of renewable energy sources, such as solar, wind, and biomass, into treatment facilities improves efficiency and reduces emissions. The process efficiency can be possibly enhanced through real-time monitoring and automation, while a sustainable and resource-efficient method involves integrating bio-electrochemical systems with constructed wetlands. There are still challenges in sludge handling, land requirements, and long-term system maintenance. Balancing technological solutions, environmental protection, and economic feasibility is essential for sustainable wastewater management, which can ensure continuous access to clean water in the face of increasing demand for this vital resource.

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引用次数: 0
Atmospheric mercury concentration variations at Syowa Station, Lützow-Holm Bay, East Antarctica and contributing factors† 东南极洲l<s:1>佐-霍尔姆湾Syowa站大气汞浓度变化及其影响因素
IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-12 DOI: 10.1039/D4VA00166D
Koyomi Nakazawa, Osamu Nagafuchi, Akihiro Mitsui, Tomoaki Watanabe, Naoko Hishida, Megumu Tsujimoto and Satoshi Imura

In January 2022, gaseous elemental Hg (GEM) concentrations were continuously monitored at Syowa Station on East Ongul Island, located ∼4 km from the continent on the eastern coast of Lützow-Holm Bay, to examine atmospheric Hg concentrations during the summer in the southeastern Antarctic region. Atmospheric GEM ranged from 0.36 to 1.83 ng m−3 average value: 1.01 ± 0.21 ng m−3 and increased during the day and decreased at night. While maintaining these diurnal variations, GEM concentrations increased to 1.99 and 1.55 ng m−3 on January 2–3 and 17–20, 2022, respectively. During both events, the low-pressure system approached the Syowa Station, and the 72 hours backward trajectory analysis revealed that the air mass originated from open water surfaces, implying that Hg evasion from the sea surface increased the atmospheric GEM concentration. To investigate the causes of diurnal variation causes—excluding these two events mentioned—Hg concentrations in the soil [n = 102, 2.61 ± 3.16 (0.14–19.0) ng g−1], snow, glacier, and ice sheet around Syowa Station (n = 19, 0.45–5.60 ng L−1), as well as in the atmosphere on the fast ice around the station (0.54–1.10 ng m−3), were measured. The results revealed that sources such as ornithogenic soil from the penguin rookery around the station, open water surfaces, and the gaseous oxidized Hg transported inland by katabatic winds did not contribute to the daytime GEM concentration increases. The cause of the summer diurnal variation at Syowa Station was unidentified and warrants further investigation.

2022年1月,在距离l佐-霍尔姆湾东海岸大陆约4公里的东Ongul岛的Syowa站连续监测了气态元素汞(GEM)浓度,以检查南极东南部地区夏季大气汞浓度。大气GEM平均值为0.36 ~ 1.83 ng m−3(1.01±0.21 ng m−3),白天升高,夜间降低。在保持这些日变化的同时,GEM浓度在2022年1月2-3日和17-20日分别增加到1.99和1.55 ng m−3。在这两次事件中,低压系统均向Syowa站靠近,72 h反轨迹分析表明气团来源于开阔水面,表明汞从海面逃逸增加了大气GEM浓度。为了研究汞日变化的原因(排除上述两个事件),测量了Syowa站周围的土壤(n = 102, 2.61±3.16 (0.14-19.0)ng g−1)、雪、冰川和冰盖(n = 19, 0.45-5.60 ng L−1)以及站周围快速冰上大气(0.54-1.10 ng m−3)中的汞浓度。结果表明,站内企鹅栖息地的鸟源土壤、开阔水面以及由降风向内陆输送的气态氧化汞等源对白天GEM浓度的增加没有贡献。Syowa站夏季日变化的原因尚未确定,需要进一步调查。
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引用次数: 0
Quantification of microplastic targets in environmental matrices using pyrolysis-gas chromatography-mass spectrometry† 用热解-气相色谱-质谱法定量环境基质中的微塑料目标
IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-08 DOI: 10.1039/D4VA00269E
Rebecca H. Peel, Charlotte E. M. Lloyd, Stephen J. Roberts, B. D. A. Naafs and Ian D. Bull

Microplastic pollution is a growing environmental problem. Consequently, an emerging area of research is the analysis of these micro-particles, to identify the distribution and impacts of plastic in the environment. This paper details the development and application of a pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) method for the quantification of microplastic pollution in terrestrial samples. Initial analysis of plastic standards using Py-GC-MS revealed diagnostic pyrolytic products, which were utilised alongside internal standards and linear regression to create calibrations for each studied synthetic plastic. A microplastic extraction protocol for soils and sediments was developed, namely an overnight density separation with wet peroxide digestion, and its efficacy confirmed through spiking and recovery experiments. Matrix effects were observed for PE, PS and PVC, highlighting the need to use multiple diagnostic compounds per plastic, where possible. Overall, these findings demonstrate that Py-GC-MS can be successfully applied for the determination of microplastic concentrations in terrestrial samples, with a view to establishing effective mitigation strategies.

微塑料污染是一个日益严重的环境问题。因此,一个新兴的研究领域是分析这些微粒,以确定塑料在环境中的分布和影响。本文详细介绍了热解-气相色谱-质谱(Py-GC-MS)定量测定陆地样品中微塑料污染的方法的发展和应用。使用Py-GC-MS对塑料标准进行初步分析,发现了诊断性热解产物,这些产物与内部标准和线性回归一起使用,为每种研究的合成塑料创建校准。建立了一种土壤和沉积物微塑料提取方案,即湿式过氧化物消解过夜密度分离,并通过穗化和回收实验验证了其有效性。在PE, PS和PVC中观察到基质效应,强调需要在可能的情况下对每种塑料使用多种诊断化合物。总体而言,这些发现表明,Py-GC-MS可以成功地用于测定陆地样品中的微塑料浓度,以期建立有效的减缓策略。
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引用次数: 0
A life cycle assessment study of European Space Agency's space tracking terminal†
IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-06 DOI: 10.1039/D4VA00070F
Alex Zabeo, Michele Molin, Lorenzo Favretto, Lisa Pizzol, Marc Roubert, Florian Renk, Petra Scanferla and Elena Semenzin

The transition to a low-carbon and resource-efficient circular economy is a political pillar of the EU and a priority for space agencies. Indeed, the space industry is pursuing sustainable development practices to reduce the environmental impacts. Life Cycle Assessment (LCA) is internationally recognized as the most appropriate methodology to estimate the environmental impacts of products, processes, and services and to evaluate the effectiveness of sustainability strategies related to reducing these negative externalities. To support the European Space Agency (ESA) in the process of planning more sustainable eco-design solutions, the objective of this paper is the development of a cradle-to-grave screening LCA study to assess the environmental impacts concerning the ESA's ground-based satellite tracking system based in New Norcia (AU) along its entire life cycle, including the tracking antenna and the photovoltaic panels. This scenario has been compared with 2 other scenarios to verify whether the use of photovoltaic panels has a benefit in terms of environmental impact (scenario A) and to understand the consequences in changing the location of the station, from New Norcia to Cebreros (E) by considering the change in the national energy mix from the Australian to the Spanish (scenario B). This study is one of the first attempts to apply the LCA methodology to the space sector, and its results, conducted according to ISO 14040/44 2021 guidelines and by means of the ReCiPe calculation method (2016), will be exploited by the ESA to plan a more sustainable eco-design for the construction of future space tracking stations.

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引用次数: 0
A critical review of a hidden epidemic: examining the occupational and environmental risk factors of chronic kidney disease of unknown etiology (CKDu) 对隐性流行病的重要回顾:病因不明的慢性肾脏疾病(CKDu)的职业和环境危险因素的研究
IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-04 DOI: 10.1039/D4VA00304G
Madeleine Bradley, Danielle Land, Darrin A. Thompson and David M. Cwiertny

The global burden of chronic kidney disease (CKD) in terms of mortality and disability-adjusted life years has increased, and this trend is expected to worsen over the next few decades. The primary cause of CKD is known to be due to hypertension and diabetes, however, over the last three decades, a form of CKD has been described in people without any known risk factors. These cases can be described as chronic kidney disease of an unknown etiology (CKDu). Cases of CKDu are rising primarily among rural agricultural communities in affected regions and occur mostly among young male farmers. There is no agreement on whether CKDu in these emerging clusters represents a single disease or a group of different diseases. As such, hypothesized causes of CKDu development include chronic occupational heat stress and dehydration, as well as exposure to environmental contaminants and agrochemicals, such as heavy metals and pesticides. The purpose of this critical review is to bring together the current literature on proposed CKDu etiologies, specifically those related to work in the agricultural sector. This review examines what is known about these occupational and environmental factors and their potential impact on the widespread epidemics of CKDu.

慢性肾脏疾病(CKD)在死亡率和残疾调整生命年方面的全球负担已经增加,预计这一趋势将在未来几十年恶化。已知CKD的主要原因是高血压和糖尿病,然而,在过去的三十年中,一种形式的CKD在没有任何已知危险因素的人群中被描述。这些病例可以被描述为病因不明的慢性肾脏疾病(CKDu)。CKDu病例主要在受影响地区的农村农业社区中上升,主要发生在年轻男性农民中。对于这些新出现的群集中的CKDu是代表一种疾病还是一组不同的疾病,目前尚无一致意见。因此,CKDu发展的假设原因包括慢性职业性热应激和脱水,以及暴露于环境污染物和农药,如重金属和农药。这篇重要综述的目的是汇集目前关于CKDu病因的文献,特别是那些与农业部门工作有关的文献。本文综述了已知的这些职业和环境因素及其对CKDu广泛流行的潜在影响。
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引用次数: 0
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