Water Emerging Contaminants & Nanoplastics最新文献

{"title":"Dyeing sludge-derived biochar for efficient removal of malachite green from dyeing wastewater","authors":"Wei Qian, Yili Deng, Yongzheng Zhang, Yingying Li, Yi Fang, Xiaolong Li, Jialin Liang, Hui Liu","doi":"10.20517/wecn.2024.25","DOIUrl":"https://doi.org/10.20517/wecn.2024.25","url":null,"abstract":"In light of the rapid advancement of the dyeing industry, the resultant environmental contamination from extensive dye utilization and the subsequent sludge generated by the treatment of dyeing wastewater has escalated, prompting broad apprehension. This study employed the response surface methodology to explore the iodine adsorption capacity of pyrolyzed dyeing sludge peat treated with ZnCl2 [ZnCl2 modified sludge biochar (ZSC)] as the adsorbent material for optimization of the parameters for ZSC preparation. The analysis of the variance of the response surface methods indicated that the pyrolysis temperature emerged as the most pivotal factor. The maximum adsorption capacity of malachite green (MG) by ZSC reached up to 224.0962 mg/g. Moreover, the adsorptive efficacy of ZSC on MG was evaluated under varying environmental conditions, showcasing that the optimal parameters facilitated a remarkable MG removal efficiency of 99.13%. Even after five cycles of reuse, ZSC maintained a substantial decolorization capability of 45% for MG. Characterization of ZSC through scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and Brunauer–Emmett–Teller (BET) indicated a high specific surface area of 495.38 m2/g and the presence of reactive functional groups (–OH and C–O). The adsorption process, upon thermodynamic and kinetic evaluation, aligned more closely with the Langmuir isotherm model and the pseudo-second-order kinetic model. Mechanistic adsorption results revealed that electrostatic attraction, pore-filling, hydrogen bonding, and π-π stacking interactions collectively accounted for the elevated MG removal efficacy by the ZSC. This study represents a promising approach, transforming waste into a treatment solution with the dual purpose of dye removal and resource reclamation from dyeing sludge.","PeriodicalId":507491,"journal":{"name":"Water Emerging Contaminants & Nanoplastics","volume":"57 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141804880","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}

{"title":"Occurrence and identification of microplastics retained in corrosion deposits of drinking water transmission pipes","authors":"Marta Magnucka, Joanna Świetlik, Agata Lembicz, Piotr Nawrocki, L. Fijołek","doi":"10.20517/wecn.2024.21","DOIUrl":"https://doi.org/10.20517/wecn.2024.21","url":null,"abstract":"The irregular structure and high porosity of corrosion deposits create suitable conditions for the retention, accumulation and adsorption of microplastics (MPs) and nanoplastics (NPs) transported by distributed water. Due to the low mass and continuous degradation of MPs, under certain conditions (e.g., changes in water composition or hydraulic conditions, network failures), these particles can be re-released into the water, causing secondary contamination. This paper presents preliminary results on the degree of MP contamination of sediments lining the inner surface of metal alloy pipes taken from a municipal drinking water distribution network. The isolated particles were assessed in terms of number, shape, residence time in the network, and origin. Plastic fragments classified as MPs and NPs were found in all analyzed corrosion deposits. Fragments smaller than 50 μm predominated, indicating a high level of plastic fragmentation associated with advanced degradation and prolonged residence in the environment. The predominant plastics identified were polyethylene (PE), polyethylene terephthalate (PET), and polyamides. High-carbon particles, most likely NP particles, whose presence in drinking water may pose a high health risk to consumers due to their potential to migrate into body tissues, were very abundant in the sediments but impossible to count with the techniques used. The results indicate the need to intensify research on the content of MPs and NPs not only in drinking water, but also in the sediments covering the interior of distribution pipes, and to identify factors that may cause their secondary release into bulk water.","PeriodicalId":507491,"journal":{"name":"Water Emerging Contaminants & Nanoplastics","volume":"2 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141822384","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}

{"title":"A review on the presence of microplastics in environmental matrices within Southeast Asia: elucidating risk information through an analysis of microplastic characteristics such as size, shape, and type","authors":"Ahmad Ammarluddin Mohd Ali, Aina Arifah Khalid, Nur Izzati Abd Razak, Nur Syafiqah Mohd Maulana, Nur Sakinah Roslan, Raz Shauqeena Batrisyea Razmi, Wan Mohamad Akif Wan Ruseli, Y. S. Ibrahim, Maisarah Jaafar, Rohani Shahrudin, Khaira Ismail, S. T. Anuar","doi":"10.20517/wecn.2023.73","DOIUrl":"https://doi.org/10.20517/wecn.2023.73","url":null,"abstract":"Microplastics’ ecotoxicological potential in almost all ecosystems makes them a global environmental issue. This review evaluates Southeast Asian microplastic contamination data from 2013 to 2023. This evaluation examined 285 research publications from Scopus, Web of Science, and ScienceDirect, mostly on sediment and water matrices. Based on their size, shape, polymer type, and potential risks from polymer hazards in Southeast Asian countries, this analysis assesses microplastic pollution in biota, sediment, water, and other environmental matrices. The majority of microplastics in this region are small (46%) and large (32%). Within the biota matrix, small microplastics (SMP) and large microplastics (LMP) dominated. Fibers predominated in all matrices, particularly the biota matrix. Polyethylene emerged as the most abundant polymer type (22%), found in all four matrices. Despite being less abundant, polyurethane and polyamide have high hazard scores, raising ecological concerns due to their detrimental effects on environmental matrices. According to the analyzed data, Southeast Asian countries face significant risks due to high levels of microplastic contamination in water, sediments, biota, and other matrices. However, there are noticeable discrepancies in Southeast Asian data, indicating progress in microplastic research, with most data coming from Indonesia, Thailand, Malaysia, Vietnam, and the Philippines and little information in the literature regarding microplastic contamination from East Timor, Laos, Brunei, Myanmar, and Cambodia.","PeriodicalId":507491,"journal":{"name":"Water Emerging Contaminants & Nanoplastics","volume":" 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140682748","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}

{"title":"Carbon-based adsorbents for micro/nano-plastics removal: current advances and perspectives","authors":"Huifang Zheng, Qian Chen, Zhijie Chen","doi":"10.20517/wecn.2023.74","DOIUrl":"https://doi.org/10.20517/wecn.2023.74","url":null,"abstract":"Carbon-based adsorbents, such as graphene, graphene oxide (GO), activated carbon/biochar (AC/BC), carbon nanotubes (CNTs), metal-modified carbon, and fly ash, are garnering increasing attention due to their exceptional structural properties, enabling their potential effectiveness in removing microplastics and nano-plastics (MPs/NPs) from aqueous solutions. A key attribute contributing to the efficacy of these carbon adsorbents in addressing MPs/NPs is their flexibly tunable surface properties. To advance the applicability of functionalized carbon adsorbents in the context of MPs/NPs removal, it is necessary to highlight their interactions with MPs/NPs in aqueous environments. The review commences by outlining the main adsorption mechanisms. Subsequently, the adsorption behavior of different types of MPs/NPs on carbon-based adsorbents is analyzed and how different factors influence their adsorption performance is examined. Finally, the review concludes by offering insights into prospective avenues for future research concerning functional carbon adsorbents for MPs/NPs removal.","PeriodicalId":507491,"journal":{"name":"Water Emerging Contaminants & Nanoplastics","volume":"311 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140775833","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}

{"title":"Per- and polyfluoroalkyl pollution in marine environments: a viewpoint about Africa","authors":"Mohamed Ben-Haddad, G. De-la-Torre, T. A. Aragaw, B. Mghili, Mohamed Rida Abelouah, Sara Hajji, A. Ait Alla","doi":"10.20517/wecn.2023.70","DOIUrl":"https://doi.org/10.20517/wecn.2023.70","url":null,"abstract":"Per- and poly-fluoroalkyl substances (PFAS) represent an extensive and expanding group of chemicals considered contaminants of emerging concern (CECs). These elements have found widespread usage in diverse industrial and commercial sectors since the 1940s. The advancement of modern analytical methods in developed countries has significantly contributed to the increased research on the environmental behavior and risk assessment of PFAS. However, what about developing countries? Over time, the focus on PFAS has expanded beyond legacy PFAS to encompass novel ones. In this perspective, we focus on analyzing the existing knowledge concerning PFAS in the marine environment, aiming to shed light on the limited research pertaining to per- and polyfluoroalkyl pollution in the marine ecosystems of Africa.","PeriodicalId":507491,"journal":{"name":"Water Emerging Contaminants & Nanoplastics","volume":"1 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140353666","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}

{"title":"Oxy-biodegradable plastics in freshwater environments: degradation and biofouling","authors":"G. Olivatto, Ana Laura Athayde Lourenço, A. J. de Souza, V. L. Tornisielo","doi":"10.20517/wecn.2023.62","DOIUrl":"https://doi.org/10.20517/wecn.2023.62","url":null,"abstract":"Growing concern about the impact of plastic pollution on the environment has led to the creation of global public policies and the consumption of “environmentally friendly” products, such as oxy-biodegradable plastics. In this context, “greenwashing” practices can arise, i.e., the product promises more environmental benefits than it actually offers, which can lead to superfluous use, inappropriate disposal, and the generation of microplastics (MPs). However, the scientific literature lacks studies that evaluate the behavior of oxy-biodegradable plastic when exposed to the freshwater environment. In this respect, the aim of the current study was to evaluate the degradation process of oxy-biodegradable plastic bags made from high-density polyethylene (HDPE) in river water. To this end, the current study aimed to assess whether these bags actually meet the label information (which corresponds to the complete degradation of material) or whether they correspond to greenwashing practices. The physical and chemical alterations, and the formation of biological communities that occurred on the surface of the plastic material when exposed to natural aging and submerged in freshwater were monitored using mid-infrared absorption spectroscopy with attenuated total reflectance (FTIR-ATR) and scanning electron microscopy (SEM). The characterization of the samples after 180 days of exposure showed that the oxy-biodegradable bags were not completely degraded, with only fragmentation of the material and generation of MPs. In addition, it was also observed that microorganisms present in the water easily colonized the plastic surface from the start of the experiment. In this way, the oxy-biodegradable bags analyzed correspond to a greenwashing practice, which is extremely harmful, since it can influence the increase in consumption of these products, generating greater improper disposal of these materials, and consequently the generation of MPs and the formation of biofilms, which can carry pathogenic microorganisms to the aquatic biota and to humans.","PeriodicalId":507491,"journal":{"name":"Water Emerging Contaminants & Nanoplastics","volume":"18 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140264022","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}

{"title":"Plastic and anthropogenic microfiber pollution on exposed sandy beaches in Nova Scotia, Canada","authors":"Noreen E. Kelly, Olga Trela, Heidi Gavel, Alyssa Vander Kuylen","doi":"10.20517/wecn.2023.66","DOIUrl":"https://doi.org/10.20517/wecn.2023.66","url":null,"abstract":"Aim: To investigate the baseline abundance of microplastics on two sandy beaches along an exposed coastline in an understudied region of the Northwest Atlantic.\u0000 Methods: Sandy sediments were sampled from two beaches along the eastern shore of Nova Scotia, Canada from High, Mid, and Low intertidal positions. Density floatation using a sodium iodide (NaI) solution was used to separate particles from 100 g of sediments in each sample. Particles were characterized by size, shape, and colour, and Fourier transform infrared (FTIR) spectroscopy was conducted for polymer identification.\u0000 Results: At both beaches, the majority of particles found were small (< 1.4 mm), transparent microfibers. Microplastics were polymers of polyethylene terephthalate (PET), nylon, or alkyds (paints). The mean concentrations at both beaches were similar, at 5.08 ± 3.20 and 5.58 ± 4.52 microplastics per 100 g of sediment. Non-plastic (i.e., natural and semi-synthetic cellulosic) microfibers were up to 19 times more abundant than microplastics, with mean concentrations of 75.9 ± 60.1 and 97.7 ± 87.9 per 100 g sediment. Mean particle counts did not differ significantly across tidal ranges due to their high variability over small spatial scales (10 s of m).\u0000 Conclusion: Using new investigative tools yielded estimates of microplastic pollution 1-2 orders of magnitude lower than earlier research conducted at these sites, and was generally lower than values reported from other beaches globally. Sources of microfibers were potentially from high recreational use at these sites. Future monitoring could target these sites for time series analysis of microplastic change on exposed sandy beaches.","PeriodicalId":507491,"journal":{"name":"Water Emerging Contaminants &amp; Nanoplastics","volume":" 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139621120","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}

{"title":"A baseline for microplastic occurrence in three New England estuaries","authors":"Bonnie Brown, Gregg E Moore, Hanna Mogensen, Taja Sims-Harper, Jennifer Gibson, Bo-Young Lee, Catherine Wardinski, Gabrielle Jarrett","doi":"10.20517/wecn.2023.54","DOIUrl":"https://doi.org/10.20517/wecn.2023.54","url":null,"abstract":"Although microplastics (MP) have been documented in estuarine habitats, limited published data exist for New Hampshire and northern Massachusetts hampering meaningful, regional comparison with other geographies. Here we synthesize previously unpublished data from several independent baseline studies spanning three estuarine systems including Great Bay Estuary (GBE), Hampton-Seabrook Estuary (HSE), and Great Marsh Estuary (GME) to compare geographic data for MP to other published regional studies. Data include water column in GBE (n = 179 from 7 sites), surface waters and salt marsh sediment cores from HSE (n = 72 water samples from 12 sites and n = 77 sediment cores from 8 sites), and surface waters from GME (n = 42 water samples at 10 sites). Samples were analyzed for MP characteristics initially via either automated confocal microscopy or light microscopy, allowing initial estimation of the number and size distribution of putative MP. Particles from representative samples were analyzed using laser direct infrared spectrometry (LDIR) to determine elemental analysis. MP were found in > 98% of samples collected including surface waters, water column, and marine sediments. Counts ranged from 1 to 144,000 MP particles m-3 and mean MP differed significantly among regions, sites within regions, and across years. In the GBE water column, MP tended to peak during June-August in 4 of the 5 years studied. Most MP were roughly circular and ~50 μm in diameter. LDIR confirmed that many types of plastics are in these estuarine waters and also revealed that despite the digestion processes, biogenic materials often remained, predominantly chitin, rubber, wood, and coal. These data allow us to address the realistic levels of risk that estuarine MP pose in NH and northern MA estuaries and can be used to populate existing hydrodynamic models that will predict the tributary sources, movements, and fate of MP within these aquatic habitats.","PeriodicalId":507491,"journal":{"name":"Water Emerging Contaminants &amp; Nanoplastics","volume":"565 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139204161","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}