Environmental Science: Nano最新文献

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Semi-empirical and empirical models to predict colloidal stability of titanium dioxide nanoparticles with heterogeneous eco-coronas 半经验和经验模型预测具有非均匀生态电晕的二氧化钛纳米颗粒的胶体稳定性
IF 8.131 2区 环境科学与生态学
Environmental Science: Nano Pub Date : 2026-08-13 DOI: 10.1039/d6en00548a
Riya A. Mathew,Stacey M. Louie
{"title":"Semi-empirical and empirical models to predict colloidal stability of titanium dioxide nanoparticles with heterogeneous eco-coronas","authors":"Riya A. Mathew,Stacey M. Louie","doi":"10.1039/d6en00548a","DOIUrl":"https://doi.org/10.1039/d6en00548a","url":null,"abstract":"Nanoscale and colloidal particles often acquire “eco-coronas” of naturally occurring macromolecules that can strongly modify their aggregation behavior. However, quantitative models are lacking to predict the degree of colloidal stability afforded by eco-coronas of variable surface coverage or composition. The objective of this study is to develop and evaluate new approaches to predict the attachment efficiency of titanium dioxide (TiO2) nanoparticles coated with Suwannee River natural organic matter and bovine serum albumin, individually and in mixtures, in a moderately hard water background (pH 8, net negative zeta potentials). Semi-empirical approaches based on extended Derjaguin–Landau–Verwey–Overbeek (EDLVO) theory and coagulation kinetics theory were developed to model TiO2 aggregation in the individual coatings at varying degrees of surface saturation, then extended to model mixed coatings of varied composition. The best iteration of this approach predicted attachment efficiencies with the mixed coatings with R2 = 0.96, although limitations included uncertainty in the model inputs, assumptions regarding the layer structure, and the need for measured zeta potentials and a fitted scaling factor. Alternatively, an empirical model was proposed that predicted TiO2 aggregation in the mixed coatings with R2 = 0.96, given the adsorption isotherms and calibration based on aggregation in the individual coatings. This research demonstrates that the EDLVO framework can be implemented to quantify the effects of heterogeneous eco-coronas on TiO2 nanoparticle aggregation rates, while also introducing a simple empirical approach to predict TiO2 aggregation rates in complex environmental media.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"38 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148853448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
From aggregation to stabilization: the role of biomolecular corona formation on polyethylene nanoparticles in saline environments 从聚集到稳定:生物分子电晕在盐水环境中对聚乙烯纳米粒子的作用
IF 8.131 2区 环境科学与生态学
Environmental Science: Nano Pub Date : 2026-08-12 DOI: 10.1039/d6en00626d
Lea Jacquin,Thomas Perrault,Guillaume Brotons,Muriel Lansalot,Élodie Bourgeat-Lami,Vincent Monteil,Fabrice Brunel
{"title":"From aggregation to stabilization: the role of biomolecular corona formation on polyethylene nanoparticles in saline environments","authors":"Lea Jacquin,Thomas Perrault,Guillaume Brotons,Muriel Lansalot,Élodie Bourgeat-Lami,Vincent Monteil,Fabrice Brunel","doi":"10.1039/d6en00626d","DOIUrl":"https://doi.org/10.1039/d6en00626d","url":null,"abstract":"In the environment, nanoplastics are covered with a conditioning film composed of various biomolecules present in the surrounding medium. The environmental behavior of nanoplastics in aquatic systems is therefore strongly influenced by the interactions established with these macromolecules. However, these interactions and, more broadly, the role of the eco-corona on nanoplastics are not yet well understood. In this study, the formation of biomolecular coronas on model nanoparticles of polyethylene and poly(ethylene-co-vinyl acetate) was investigated, with a particular focus on their stabilization in saline environments. Three biomolecules were selected as stabilizers: bovine serum albumin, ulvans, and extracellular polymeric substances derived from marine microorganisms. The adsorption processes, corona thickness and colloidal stability were characterized by UV-visible spectroscopy and small-angle X-ray scattering. It was observed that polysaccharides were adsorbed in the form of multilayers, while proteins mainly formed monolayers. Furthermore, the formation of a stable corona was found to prevent aggregation and maintain colloidal behavior in seawater without adding other surfactants. This work provides new insights into the role played by macromolecules in the biofilm matrix in modulating the transport and potential impacts of nanoplastics in marine environments.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"41 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148853450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nanodelivery of nitric oxide donors improves uptake and redox balance in soybean roots 纳米输送一氧化氮供体改善大豆根系的吸收和氧化还原平衡
IF 8.131 2区 环境科学与生态学
Environmental Science: Nano Pub Date : 2026-08-11 DOI: 10.1039/d5en01199j
Ana Cristina Preisler,Giovanna Camargo do Carmo,Amanda Martins Dionisio,Rafael Caetano da Silva,Joana Claudio Pieretti,Roberta Albino dos Reis,Alex Carvalho Alavarse,Weslley Souza Sales,Waldiceu A. Verri, Jr,Zsuzsanna Kolbert,Amedea Barozzi Seabra,Halley Caixeta Oliveira
{"title":"Nanodelivery of nitric oxide donors improves uptake and redox balance in soybean roots","authors":"Ana Cristina Preisler,Giovanna Camargo do Carmo,Amanda Martins Dionisio,Rafael Caetano da Silva,Joana Claudio Pieretti,Roberta Albino dos Reis,Alex Carvalho Alavarse,Weslley Souza Sales,Waldiceu A. Verri, Jr,Zsuzsanna Kolbert,Amedea Barozzi Seabra,Halley Caixeta Oliveira","doi":"10.1039/d5en01199j","DOIUrl":"https://doi.org/10.1039/d5en01199j","url":null,"abstract":"Nitric oxide (NO) is a molecule that participates in several physiological processes in plants. Its exogenous application requires the use of NO donors, such as S-nitrosoglutathione (GSNO). However, these compounds present relative instability in the environment. Thus, the use of nanocarriers appears to be a promising alternative for the application of NO donors in agriculture, but there is still a knowledge gap related to the interaction mechanisms between nanomaterials and plants. Thus, the objective of this study was to evaluate the interaction of NO-releasing chitosan nanoparticles with roots, and their impact on the homeostasis of reactive nitrogen and oxygen species in soybean (Glycine max), as a globally important crop. The treatments were control (distilled water), chitosan nanoparticles containing GSNO (NP CS-GSNO), chitosan nanoparticles containing non-nitrosated glutathione (NP CS-GSH), and free GSNO, for two exposure intervals (30 min and 24 h). GSNO/GSH were applied to the root system of hydroponically-grown plants at 100 μM. Nanoparticles were labelled with rhodamine B to enable their detection in roots by confocal spectral microscopy. NO levels in roots were visualised simultaneously using the fluorescent probe 4,5-diaminofluorescein diacetate (DAF-2DA). Treatment with NP CS-GSNO induced the highest DAF-triazole fluorescence, particularly at 30 min, which was quenched by the NO scavenger cPTIO, supporting the NO-association of the observed signal. It was possible to localize the rhodamine-related fluorescence within the roots treated with nanoparticles at both time-points, although the intensity increased after 24 h. There was a high percentage of co-localization between DAF-2DA and rhodamine fluorescence in roots. After 30 min, NP CS-GSNO induced an increase in root hydrogen peroxide levels, while a significant reduction was observed after 24 hours compared to the control. The content of S-nitrosothiols (RSNO) in the roots was significantly higher for the NP CS-GSNO and NP CS-GSH treatments after 30 min, compared with the other treatments. At 24 h, root RSNO content was approximately 30% higher in the NP CS-GSNO treatment compared to free GSNO. The results obtained here suggest an association of GSNO-loaded chitosan nanoparticles with root tissues and support enhanced NO bioavailability compared with free GSNO. These findings highlight the potential of nanotechnology in agriculture and draw attention to the need for detailed studies on the fate of nanoparticles in plant systems.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"72 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148853451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative mechanistic insights into the impact of carboxylated carbon nanotubes on oxidative stress and antioxidant enzyme modulation in halophilic green microalgae 羧化碳纳米管对嗜盐绿色微藻氧化应激和抗氧化酶调节影响的比较机制见解
IF 8.131 2区 环境科学与生态学
Environmental Science: Nano Pub Date : 2026-08-05 DOI: 10.1039/d5en01007a
Akram Hosseinnia,Samar Mortazavi,Ebrahim Alaei,Majid Zeinali
{"title":"Comparative mechanistic insights into the impact of carboxylated carbon nanotubes on oxidative stress and antioxidant enzyme modulation in halophilic green microalgae","authors":"Akram Hosseinnia,Samar Mortazavi,Ebrahim Alaei,Majid Zeinali","doi":"10.1039/d5en01007a","DOIUrl":"https://doi.org/10.1039/d5en01007a","url":null,"abstract":"Carbon nanotubes (CNTs) will ultimately find their way into aquatic ecosystems and exert various effects on aquatic organisms. Photosynthetic microalgae as producer organisms are located at the base of the food chain, and due to their widespread distribution in marine ecosystems, it seems necessary to investigate the toxicological impacts of nanotubes on them. The response of algae to different forms of functionalized CNTs is not well studied. In the present study, carboxylated multi-walled and single-walled CNTs (SWCNT-COOH and MWCNT-COOH) were evaluated for the induction of oxidative stress responses (hydrogen peroxide, malondialdehyde, and protein carbonyl) and antioxidant defense systems (glutathione, catalase, glutathione-s-transferase, glutathione reductase and ascorbate peroxidase) in Dunaliella salina. Our results demonstrated that the response of cells to carboxylated CNTs is type- and concentration-dependent. SWCNT-COOH induced H2O2 production at all tested concentrations (2.5–200 mg L−1), whereas MWCNT-COOH triggered significant increases only at concentrations ≥100 mg L−1. At low concentrations (≤5 mg L−1), both CNTs demonstrated ROS-scavenging activity, evidenced by reduced lipid peroxidation and moderate enhancement of antioxidant defenses. An increase in the cell contents of lipid oxidation products was observed following exposure to high concentrations of functionalized CNTs. Protein oxidation products increased only in cells exposed to SWCNT-COOH. Catalase and ascorbate peroxidase activities were also upregulated at high concentrations of carboxylated CNTs. Exposure of Dunaliella cells to high concentrations of carboxylated CNTs, resulted in elevation of total cellular glutathione and reduction of glutathione reductase activity. In conclusion, despite the existence of evidence of the beneficial effects of CNTs in low concentrations on algal cell indices, carboxylated CNTs, especially SWCNT-COOH, in high concentrations induce oxidative stress in Dunaliella salina, which also results in the activation of the antioxidant defense system.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"271 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148853447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synergistic remediation of Cu and Zn in sludge by ryegrass coupled with BC/nZVI: mechanisms of plant–nanomaterial–microbe interactions 黑麦草与BC/nZVI对污泥中Cu和Zn的协同修复:植物-纳米材料-微生物相互作用机制
IF 8.131 2区 环境科学与生态学
Environmental Science: Nano Pub Date : 2026-08-04 DOI: 10.1039/d6en00323k
Ziqi Chen,Hao Lv,Xiaoguo Zhou,Kun Li,Hang Wang,Xiankai Wang,Zonghan Xie,Shifa Zhou,Xiang Wu,Keke Xiao,Jiakuan Yang,Huijie Hou,Jianyu Gong
{"title":"Synergistic remediation of Cu and Zn in sludge by ryegrass coupled with BC/nZVI: mechanisms of plant–nanomaterial–microbe interactions","authors":"Ziqi Chen,Hao Lv,Xiaoguo Zhou,Kun Li,Hang Wang,Xiankai Wang,Zonghan Xie,Shifa Zhou,Xiang Wu,Keke Xiao,Jiakuan Yang,Huijie Hou,Jianyu Gong","doi":"10.1039/d6en00323k","DOIUrl":"https://doi.org/10.1039/d6en00323k","url":null,"abstract":"Copper (Cu) and zinc (Zn) represent the predominant heavy metal contaminants in municipal sewage sludge across China, presenting substantial challenges for its safe disposal and sustainable utilization. In phytoremediation-based approaches, issues such as insufficient metal removal and unclear intra-plant transport mechanisms remain. This study reveals that biochar-supported nanoscale zero-valent iron (BC/nZVI) forms complexes with Cu/Zn inside ryegrass root cells and regulates their transport, achieving highly efficient co-remediation of copper and zinc in sludge. By combining BC/nZVI with ryegrass (Lolium perenne L.), the speciation transformation and migration patterns of Cu and Zn during remediation were systematically elucidated, clarifying the synergistic mechanisms between BC/nZVI and plants. Results showed that BC/nZVI 50% combined with ryegrass reduced the bioavailability of Cu and Zn by 42% and 34%, respectively, and decreased the reducible fraction of Cu from 31% to 15%. BC/nZVI also promoted the translocation of Cu and Zn to shoots, increased their distribution in root cell membranes, and regulated the expression of the copper transporter COPT1. Low-dose nZVI (10–20%) alleviated oxidative stress and enhanced antioxidant enzyme activity in ryegrass, whereas higher doses inhibited plant growth. Moreover, the combined treatment markedly improved the microbial community structure in sludge, enriching key bacterial taxa involved in carbon and nitrogen cycling, thus demonstrating the interactions of stabilization, phytoextraction, and microbial restructuring. This work provides a theoretical foundation for nanomaterial-enhanced phytoremediation and offers a practical strategy for controlling heavy metals and facilitating the land application of sludge.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"40 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148853449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative ecotoxicity of well-defined biodegradable nanoplastics in soil and water using the environmentally relevant bacterium Arthrobacter globiformis 使用与环境相关的球形节杆菌比较定义明确的可生物降解纳米塑料在土壤和水中的生态毒性
IF 8.131 2区 环境科学与生态学
Environmental Science: Nano Pub Date : 2026-07-17 DOI: 10.1039/d6en00156d
Virginia Gálvez-Blanca,Carlos Edo,Francisca Fernández-Piñas,Roberto Rosal
{"title":"Comparative ecotoxicity of well-defined biodegradable nanoplastics in soil and water using the environmentally relevant bacterium Arthrobacter globiformis","authors":"Virginia Gálvez-Blanca,Carlos Edo,Francisca Fernández-Piñas,Roberto Rosal","doi":"10.1039/d6en00156d","DOIUrl":"https://doi.org/10.1039/d6en00156d","url":null,"abstract":"The acute toxicity of polylactic acid (PLA) and poly(butylene adipate-co-terephthalate) (PBAT) nanoplastics in soil and aquatic environments was assessed using as endpoints the inhibition of the dehydrogenase activity as well as reactive oxygen species (ROS) formation and membrane damage in Arthrobacter globiformis, a ubiquitous environmentally relevant microorganism. Nearly monodisperse nanoplastic particles (100–200 nm) were prepared using an oil-in-water emulsion technique. Dehydrogenase activity was monitored across three distinct soil types spiked with PLA or PBAT nanoplastics: the standard sandy soil LUFA 2.1 (Landwirtschaftliche Untersuchungs- und Forschungsanstalt Speyer) and two real agricultural soils. While significant time-dependent inhibition was observed in the standard soil, responses were markedly attenuated in the agricultural soils, where high organic matter and carbonate content likely reduced nanoplastic bioavailability. Conversely, exposure to the nanoplastics in water, lacking soil buffering, produced an initial metabolic stimulation followed by a marked decline after 24 h, accompanied by increased membrane permeability and suggesting altered cellular integrity under prolonged exposure conditions. This exposure scenario also revealed polymer-dependent differences, with PLA treatments showing higher membrane permeability responses than PBAT after prolonged exposure. These findings underscore that results obtained using standard reference soils may significantly differ from those in natural soils, and that in the absence of complex environmental matrices, nanoplastic toxicity appears to be influenced by exposure duration and the degradation behaviour of the polymer backbone. Although biodegradable plastics are increasingly promoted as sustainable alternatives, the nanoplastics generated from them may pose a risk, inducing biological damage to environmental organisms even after short-term exposure.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"19 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148596499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Outstanding Reviewers for Environmental Science: Nano in 2025 环境科学杰出评审员:2025年纳米
IF 8.131 2区 环境科学与生态学
Environmental Science: Nano Pub Date : 2026-07-17 DOI: 10.1039/d6en90029a
{"title":"Outstanding Reviewers for Environmental Science: Nano in 2025","authors":"","doi":"10.1039/d6en90029a","DOIUrl":"https://doi.org/10.1039/d6en90029a","url":null,"abstract":"We would like to take this opportunity to thank all of the Environmental Science: Nano reviewers for helping to preserve quality and integrity in chemical science literature. We would also like to highlight the Outstanding Reviewers for Environmental Science: Nano in 2025.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"26 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148596500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
TREADS: tyre nanoparticles produced using a bench-top tyre wear simulator. 胎面:使用台式轮胎磨损模拟器生产的轮胎纳米颗粒。
IF 8.131 2区 环境科学与生态学
Environmental Science: Nano Pub Date : 2026-07-02 DOI: 10.1039/d6en00217j
David P O'Loughlin,Charlotte Gisbourne,Coco Day,Joe Beeby,Tom O'Neill,Molly J Haugen,Nobuhiro Morone,Evert Duistermaat,Renée de Boeck,Sebastiaan H Galesloot,Jos van Triel,Miriam Gerlofs-Nijland,Flemming Cassee,Anne E Willis,Adam M Boies,Marion MacFarlane
{"title":"TREADS: tyre nanoparticles produced using a bench-top tyre wear simulator.","authors":"David P O'Loughlin,Charlotte Gisbourne,Coco Day,Joe Beeby,Tom O'Neill,Molly J Haugen,Nobuhiro Morone,Evert Duistermaat,Renée de Boeck,Sebastiaan H Galesloot,Jos van Triel,Miriam Gerlofs-Nijland,Flemming Cassee,Anne E Willis,Adam M Boies,Marion MacFarlane","doi":"10.1039/d6en00217j","DOIUrl":"https://doi.org/10.1039/d6en00217j","url":null,"abstract":"TREADS, the Tyre Rubber Emission And Debris System, is an instrument that can produce high concentrations of sub-micron tyre wear particles, with a size distribution that matches established literature descriptions of nano-tyre particles, in a portable and adaptable device that is compatible with cell exposure systems for toxicological assessment. Test cycles of one-hour with TREADS showed a constant particle concentration averaging between 2-6 × 106 cm-3, depending on the tyre sampled. These particles were round, consistent with a gas-to-particle conversion and were produced at rubber temperatures between 37 and 44 °C. TREADS is the first low-cost, bench-top and portable system able to produce nano-TPs and is designed to be reproducible and user-friendly, allowing for hour-long generation of nano-TPs free from any environmental or road surface contamination.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"2 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148372512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of nano/micro structured TiO2 films inactivation of multidrug-resistant E. coli 226 in greywater 纳米/微结构TiO2膜对灰水中多重耐药大肠杆菌226失活的评价
IF 8.131 2区 环境科学与生态学
Environmental Science: Nano Pub Date : 2026-06-23 DOI: 10.1039/d5en00911a
Luz Adriana Rincón Barón, Guoduan Liu, Laura Catalina Gómez-Prias, Augusto Enrique Mejía- Gómez, Juan Carlos Salcedo-Reyes, Ana Karina Carrascal-Camacho, Aura M. Pedroza-Rodríguez, Camilo Velez
{"title":"Evaluation of nano/micro structured TiO2 films inactivation of multidrug-resistant E. coli 226 in greywater","authors":"Luz Adriana Rincón Barón, Guoduan Liu, Laura Catalina Gómez-Prias, Augusto Enrique Mejía- Gómez, Juan Carlos Salcedo-Reyes, Ana Karina Carrascal-Camacho, Aura M. Pedroza-Rodríguez, Camilo Velez","doi":"10.1039/d5en00911a","DOIUrl":"https://doi.org/10.1039/d5en00911a","url":null,"abstract":"This study evaluates the performance of nano/micro-structured TiO2 films synthesized by Atomic Layer Deposition (ALD) and the Peroxo sol-gel (PSG) method using titanium isopropoxide (TTIP) as precursor, focusing on their structural properties and photocatalytic activity for greywater disinfection. A general factorial design was implemented by varying the annealing temperature from 300 to 600 °C under nitrogen to promote the formation of the anatase phase. The photocatalytic response was assessed through the inactivation of Escherichia coli 226 in real greywater. SEM analysis revealed that ALD films exhibited uniform and compact layers with thicknesses close to 20 nm, whereas PSG films showed polydisperse morphologies with irregular particle distribution and an average thickness of approximately 1 µm. XRD characterization demonstrated that 550 °C was the optimal annealing temperature to achieve well-defined anatase crystallinity for both deposition techniques. Optical and electrical analyses indicated that increasing temperature reduced the band gap and modified resistivity, with notable differences associated with each synthesis route. Photocatalytic experiments showed that PSG films achieved the highest bacterial inactivation, reaching 66.4 ± 0.1 % removal of E. coli 226 after 30 min, compared with 39.5 ± 0.3 % for ALD films and 17.1 ± 0.3 % under UV irradiation alone. These results demonstrate that TiO₂ films prepared via the PSG route and annealed at 550 °C constitute a more effective alternative for greywater treatment, outperforming both ALD-derived films and UV photolysis and highlighting the relevance of microstructural features and thermal treatment in determining photocatalytic efficiency.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"35 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2026-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148305458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nano-enabled fertilization alters nitrogen release dynamics and improves fertilizer use efficiency by reducing volatilization and leaching losses: Insights from 15N tracing and kinetic modelling 纳米施肥通过减少挥发和淋失来改变氮释放动力学,提高肥料利用效率:来自15N追踪和动力学建模的见解
IF 8.131 2区 环境科学与生态学
Environmental Science: Nano Pub Date : 2026-06-18 DOI: 10.1039/d6en00403b
Surya Teja Varanasi, Kannan Pandian, Meena Sadasivam, Raju Marimuthu, Prabu Padanillay Chidambaram, Raja Kalimuthu, Mohamed Roshan Abu Firnass Mustaffa
{"title":"Nano-enabled fertilization alters nitrogen release dynamics and improves fertilizer use efficiency by reducing volatilization and leaching losses: Insights from 15N tracing and kinetic modelling","authors":"Surya Teja Varanasi, Kannan Pandian, Meena Sadasivam, Raju Marimuthu, Prabu Padanillay Chidambaram, Raja Kalimuthu, Mohamed Roshan Abu Firnass Mustaffa","doi":"10.1039/d6en00403b","DOIUrl":"https://doi.org/10.1039/d6en00403b","url":null,"abstract":"Inefficient nitrogen (N) management in agroecosystems is largely driven by rapid nutrient release and substantial losses from conventional urea fertilizers, resulting in low nitrogen use efficiency (NUE) and environmental concerns. This study evaluated the ability of nano-enabled fertilization to regulate N dynamics to better synchronize N availability with crop demand. An integrated framework combining soil incubation, ammonia volatilization, nitrate leaching and 15N isotopic tracing was employed to quantify N transformation, loss pathways and plant uptake. The results revealed that conventional urea exhibited rapid N release, reaching peak available nitrogen concentrations of 183.4 mg kg-1 within 3 weeks, whereas nano urea treatments delayed peak nitrogen availability to 6–7 weeks, indicating a sustained release pattern. This behaviour was supported by kinetic modelling, where first-order release rate constants were markedly lower under nano urea (0.115–0.151 week-1) than under conventional urea (0.664–0.753 week-1), confirming slower and more controlled nitrogen release The sustained release significantly reduced ammonia volatilization loss by 53% (11.7 vs 24.7 mg kg-1) and nitrate leaching at 30 cm depth by 39% (81 vs 133 mg kg-1) under nano urea treatments compared to conventional urea under controlled conditions. Moreover, the application of integrated treatment (75% conventional urea as soil application + two foliar sprays of nano urea at critical growth stages of maize) achieved the highest total N uptake (2909.14 vs 2556.92 mg plant-1) and enhanced NUE (46.47 vs 44.21%) compared to sole urea application. Therefore, these findings suggested that nano-enabled fertilization regulates N release kinetics, reduces loss pathways and improves NUE by enhancing temporal synchronization between N availability and plant demand.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"72 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2026-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148288922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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