Environmental Science: Nano最新文献

{"title":"Environmentally persistent free radicals readily form on TiO2 but not on ZnO nanoparticles","authors":"Eric Vejerano, Jeonghyeon Ahn","doi":"10.1039/d4en00500g","DOIUrl":"https://doi.org/10.1039/d4en00500g","url":null,"abstract":"Environmentally persistent free radicals (EPFRs) are stable organic radicals and pollutants in atmospheric and soil particles. Knowledge of EPFR formation on pristine, unsupported engineered nanoparticles is limited. This study investigates the potential of TiO2 and ZnO nanoparticles in aiding aromatic precursors in forming EPFRs and is an experimental verification of our earlier prediction on nanoparticles’ potential to form EPFRs. TiO2 formed EPFRs regardless of size, while ZnO exhibited size-dependent behavior. Only smaller ZnO particles readily produced EPFRs. Larger ZnO particles only formed EPFRs when pretreated with ethanol. EPFRs formed on TiO2 and ZnO near room temperature, challenging the belief that relatively high temperatures are needed for EPFRs to form. The yields of EPFRs on pristine TiO2 and ZnO were comparable to those found in atmospheric particulate matter. We identified four types of EPFRs: carbon-centered phenoxyl, oxygen-centered phenoxyl, carbon-centered semiquinone, and oxygen-centered semiquinone radicals. Our study suggests the role of band bending in forming EPFRs on TiO2 and ZnO, in which the adsorption of aromatic precursor acts as an electron acceptor or donor. Our findings suggest that EPFRs may form in unexpected places and conditions where TiO2 and ZnO nanoparticles are present.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":8.131,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325092","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}

{"title":"Metabolomics reveals the mechanism of persistent toxicity of AgNPs at environmentally relevant concentrations to Daphnia magna","authors":"Qianqian Xiang, Qin Qin Li, Peng Wang, Hao-Cheng Yang, Zi-Hao Fu, Xiang Liang, Li Qiang Chen","doi":"10.1039/d4en00350k","DOIUrl":"https://doi.org/10.1039/d4en00350k","url":null,"abstract":"Although the ecotoxicity of silver nanoparticles (AgNPs) has been of great concern, the persistence and underlying mechanisms of AgNPs toxicity remain understudied. This study explored the persistent mechanisms of AgNPs toxicity at two sizes (AgNP-10 nm and AgNP-70 nm at 2 μg/L) to Daphnia magna using traditional toxicological methods alongside metabolomics analyses during exposure and recovery phases. After 24 h, both AgNP-10 and -70 nm exposures resulted in high silver accumulation levels in D. magna, leading to reduced heart rate and paddling frequency. Despite a significant decrease in silver content after 24 h of recovery, the heart rate reduction persisted in AgNP-exposed D. magna. Metabolomics analysis revealed differential expression of 53 and 54 metabolites induced by AgNP-10 and -70 nm exposures, respectively, primarily enriched in lipid metabolism pathways. Following the recovery period, AgNP-10 and -70 nm induced differential expression of 71 and 110 metabolites, respectively, mainly enriched in lipid metabolism and protein digestion and uptake pathways. These findings indicate that the persistence of toxicity of D. magna induced by AgNPs at physiological and metabolomic levels, predominantly attributed to silver retention and damage to D. magna’s digestive system. Overall, this study provides novel insights into the mechanism underlying the persistence of AgNPs toxicity to aquatic organism.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":8.131,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142276086","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}

{"title":"Hematite-based photoanodes decorated with oxygen-deficient CeO2 for photoelectrocatalytic degradation of tetracycline: a pulse deposition strategy","authors":"Meiying Jia, Yuanyuan Ma, Wenxuan Wang, Anqi Kang, Ping Wang, Haiyin Xu, Weiping Xiong, Zhaohui Yang","doi":"10.1039/d4en00431k","DOIUrl":"https://doi.org/10.1039/d4en00431k","url":null,"abstract":"The development of photoanodes with stable photoelectrocatalytic (PEC) performance is crucial to solve the secondary pollution caused by powder-based catalysts in antibiotic removal. In this study, FTO-α-Fe<small>₂</small>O<small>₃</small>@CeO<small>₂</small> photoanodes were prepared using a short-time effective electrochemical pulse deposition method for PEC degradation of antibiotics. Based on the outstanding light absorption capability conferred by the narrow bandgap of α-Fe<small>₂</small>O<small>₃</small>, the separation advantage of photogenerated carriers conferred by the unique oxygen vacancies of CeO<small>₂</small> and the variable polymetallic ion valence states (Fe<small>²⁺</small>/Fe<small>³⁺</small>, Ce<small>³⁺</small>/Ce<small>⁴⁺</small>), the target photoanode could achieve 93.13% degradation efficiency for tetracycline (TC) within 120 min. Ion leaching after degradation was controlled at an environmentally friendly level, and the universality was evaluated in configuration solutions from actual water. The matched Z-type heterojunction energy band structure and synergistic interaction between α-Fe<small>₂</small>O<small>₃</small> and CeO<small>₂</small> enhanced the catalytic efficiency of the photoanode, and the main contribution was attributed to the generation of the free radical ·OH and active species h<small>⁺</small>. Furthermore, cyclic voltammetric characteristic curves and Tafel curves demonstrated the advantages of the FTO-α-Fe<small>₂</small>O<small>₃</small>@CeO<small>₂</small> photoanode in terms of stability and reaction kinetics. Ultimately, more complete TC degradation pathways were proposed based on the 13 intermediates detected, and the toxicity of the intermediates was assessed. This work enriched the development of catalytic photoanodes and provides new ideas for antibiotic removal involving non-powder catalysts.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":8.131,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142276087","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}

{"title":"Correction: Functionalized boron nitride nanosheets conjugated with plant micronutrients as seed dressing agents towards control of bacterial wilt disease","authors":"Li Hao, Mei Guan, Qiangcheng Zheng, Minyan Zhou, Ziting Yin, Hongjun Zhou, Xinhua Zhou","doi":"10.1039/d4en90038c","DOIUrl":"https://doi.org/10.1039/d4en90038c","url":null,"abstract":"Correction for ‘Functionalized boron nitride nanosheets conjugated with plant micronutrients as seed dressing agents towards control of bacterial wilt disease’ by Li Hao <em>et al.</em>, <em>Environ. Sci.: Nano</em>, 2023, <strong>10</strong>, 2343–2358, https://doi.org/10.1039/D3EN00173C.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":8.131,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142236698","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}

{"title":"Advanced mesoporous adsorbents and catalysts for CO2, NOx, and VOCs removal: Mechanisms and applications","authors":"Sile Hu, Chen Li, Kexun Li, Wei Teng, Fukuan Li, Peng Zhang, Hao Wang","doi":"10.1039/d4en00621f","DOIUrl":"https://doi.org/10.1039/d4en00621f","url":null,"abstract":"In recent years, climate change and air pollution have garnered global attention due to their significant threats to human health and environment. The rising emissions of gases, such as carbon dioxide (CO2), nitrogen oxide (NOx), and volatile organic compounds (VOCs) have become pressing environmental issues. Addressing the growing emission of CO2 and gaseous pollutants urgently requires the development of new materials that can enhance the efficiency of adsorption or catalysis systems. Mesoporous materials have attracted much attention for gases capture and conversion, due to their exceptionally high surface area, interconnect pore network, and superior mass transfer. These characteristics promise improvements in adsorption/catalysis capabilities, as well as in materials durability and stability. This review explores recent advancements in mesoporous materials, such as mesoporous metal oxides (e.g., mesoporous TiO2, MnO2, Co3O4, and CeO2), mesoporous silicas, and mesoporous carbon for the adsorption or catalysis of gaseous pollutants (i.e., CO2, NOx, and VOCs). Their mesoporous texture and surface chemistry, along with the influence of loading species (e.g., metal and metal oxides) on their efficiency and selectivity for gases capture and conversion, are detailed. Furthermore, the review outlines prevailing trends, identifies key challenges in the development of mesoporous materials, delineates future research directions, and proposes strategies to achieve the deployment of mesoporous materials in gas adsorption and catalysis.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":8.131,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142231617","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}

{"title":"Ternary 3D/2D/3D direct dual Z-scheme MOF-on-MOF-derived -Fe2O3/g-C3N4/Fe-MOF photocatalyst for boosted sunlight-driven removal of metronidazole: Effect of co-existing ions, mechanistic insights, and water matrices","authors":"Anindita Bhuyan, Md. Ahmaruzzaman","doi":"10.1039/d4en00610k","DOIUrl":"https://doi.org/10.1039/d4en00610k","url":null,"abstract":"A direct solid ternary dual Z-scheme photocatalyst, 3D/2D/3D -Fe2O3/g-C3N4/Fe-MOF (FCM), was fabricated for efficient removal of metronidazole (MTZ) under sunlight irradiation. About 98.5 % of 25 mg/L MTZ was effectively degraded with a catalyst dosage of 20 mg/50mL under 90 min of sunlight irradiation. Moreover, a total organic carbon (TOC) removal of 78.5 % was achieved within the same duration under optimal conditions. The simultaneous transfer of photogenerated electron-hole pairs in the two Z-scheme pathways described here can significantly accelerate the charge separation and enhance ROS production. The effect of catalyst dose, initial MTZ concentration, inorganic cations (Na+, Mg2+, Ca2+, and Al3+), inorganic anions (Cl-, CO32-, NO3-, and SO42-), organic compounds (SDS, urea, HA, and acetone), and different water matrices on the degradation of MTZ by FCM was analyzed systematically. Furthermore, comprehending the spatial separation and transfer of photogenerated charge carriers, as well as the formation of ROS at the heterojunction interface, is critical for understanding photocatalytic degradation mechanisms. Consequently, a plausible MTZ breakdown route and charge transfer pathway were established based on the radical scavenging experiments, ESR and LCMS analysis. A high degradation efficiency of the dual Z-scheme MOF-on-MOF-derived 3D/2D/3D -Fe2O3/g-C3N4/Fe-MOF photocatalyst under all simulated experiments and different water matrices highlights its excellent photoactivity and establishes its potential use in visible-light-driven photocatalytic application in wastewater remediation.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":8.131,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175027","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}

{"title":"Synergistic effect of nano-iron phosphide and wood vinegar on soybean production and grain quality","authors":"Guikai Zhu, Yuying Tang, Yanru Ding, Weichen Zhao, Quanlong Wang, Yuanbo Li, Qibin Wang, Peng Zhang, Zhiqiang Tan, Yukui Rui","doi":"10.1039/d4en00383g","DOIUrl":"https://doi.org/10.1039/d4en00383g","url":null,"abstract":"Phosphorus fertilizer (PF) is an important nutrient for crop growth, but it can be easily immobilized in the soil by oxides of aluminum, iron, and calcium, resulting in its reduced bioavailability. In our study, we demonstrated that iron phosphide nanomaterials (FeP-NMs) effectively enhance phosphorus utilization in plants. Specifically, with the addition of wood vinegar (WV), soybeans required only 20% of the standard PF dose to achieve maximum yield. Application of 20% FeP-NMs with WV significantly increased soybean yield by 54% compared to the control group. This reduction in PF input by 80% in future agriculture not only conserves phosphate rock resources but also promotes the reuse of agricultural waste, such as WV. Furthermore, the application of FeP-NMs and WV improved the nutritional quality of soybeans, increasing flavonoid, protein, and amino acid contents in seeds by 13%, 17.5%, and 32%, respectively. These improvements can be attributed to enhanced photosynthesis (12.4%) and increased stability of the antioxidant enzyme system (reduced by 8–45%) following the application of FeP-NMs and WV. Additionally, phosphorus in FeP-NMs was more efficiently converted to soil-available and inorganic forms, thereby enhancing plants' phosphorus absorption and utilization efficiency. Our study addresses a knowledge gap concerning the potential utilization of transition metal phosphide NMs as PF in agriculture. It provides significant support for the future development of nano-agriculture, highlighting the important role of FeP-NMs in optimizing crop yield and seed quality.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":8.131,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142170516","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}

{"title":"A new scope for Environmental Science: Nano in its tenth year","authors":"Peter J. Vikesland","doi":"10.1039/d4en90039a","DOIUrl":"https://doi.org/10.1039/d4en90039a","url":null,"abstract":"A graphical abstract is available for this content","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":8.131,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142170515","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}

{"title":"Unveiling the mechanisms of black phosphorus nanosheets-induced viable but non-culturable state in Bacillus tropicus","authors":"Zhiqiang Xiong, Jin Zeng, Ming Zhao, Liwei Liu, Siyu Zhang, Shuo Deng, daxu liu, Xuejiao Zhang, Qing Zhao, Baoshan Xing","doi":"10.1039/d4en00607k","DOIUrl":"https://doi.org/10.1039/d4en00607k","url":null,"abstract":"The release of black phosphorus (BP) nanosheets has raised concerns regarding potential ecological risks. Previous studies have confirmed their toxicity to bacteria, but discrepancies were observed between results obtained from the growth curve and colony forming unit (CFU) methods, indicating the possibility of bacterial cells entering a viable but non-culturable (VBNC) state induced by BP nanosheets. To accurately assess the risks, it is crucial to understand the underlying mechanisms. In this study, we investigated the effect of BP nanosheets on Bacillustropicus, a gram-positive bacterium, using transcriptome sequencing and biological assays. Our findings revealed that BP nanosheets caused minimal cell death but predominately induced the VBNC state in most cells. At the transcriptional level, we observed significant down-regulation of pathways associated with cellular metabolism and respiratory chain in response to BP nanosheet treatment. Bacterial cells in the VBNC state exhibited depressed respiration to maintain basal cellular activity. Additionally, the reduced cellular respiration and metabolic activity were associated with a decrease in antibiotic susceptibility of the bacteria. These results provide new insights into the antibacterial mechanisms of BP nanosheets and emphasize the necessity of employing appropriate approaches, beyond the traditional CFU method, to assess the bacterial toxicity of nanomaterials.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":8.131,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142160528","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}

{"title":"Humic acid alleviates the toxicity of polystyrene nanoplastics in combination with their copper nanoparticle co-pollutants in Artemia salina","authors":"Mahalakshmi Kamalakannan, John Thomas, Natarajan Chandrasekaran","doi":"10.1039/d4en00437j","DOIUrl":"https://doi.org/10.1039/d4en00437j","url":null,"abstract":"Polystyrene nanoplastics (PSNPs) have become a ubiquitous environmental threat that can harm living organisms. Other pollutants such as copper nanoparticles (CuNPs) bind with PSNPs and humic acid (HA), alleviating the toxicity of PSNPs. In this study, individual PSNPs were interacted with CuNPs and HA to study their combined toxicity on <em>Artemia salina</em>. The size of PSNPs increased after 72 h of interaction with CuNPs. FTIR spectroscopy analysis confirmed that CuNPs bind to the surface of PSNPs. It was found that HA adsorbed more strongly onto PSNPs than CuNPs. Field emission scanning electron microscopy (FESEM) and energy-dispersive X-ray (EDX) spectroscopy confirmed the adsorption of HA and CuNPs onto the surface of PSNPs. Toxicity experiments showed a decreased toxicity of PSNPs and CuNPs upon their combination with HA (humic acid). Microscopic analysis showed particle accumulation in <em>Artemia salina</em>. The mortality rate of <em>Artemia salina</em> is higher in PSNP + CuNP combination. PSNPs + CuNPs showed higher production of antioxidant enzymes, and PSNPs + CuNPs + HA showed lower toxicity. This study shows that the presence of HA can lead to a reduction in the toxicity of PSNPs and CuNPs, suggesting their potential application in environmental remediation.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":8.131,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142160530","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}