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Impact of polystyrene nanoplastics on physiology, nutrient uptake, and root system architecture of aeroponically grown citrus plants.
IF 4.7 3区 环境科学与生态学
NanoImpact Pub Date : 2024-11-30 DOI: 10.1016/j.impact.2024.100536
Khalid Hussain, John-Paul Fox, Xingmao Ma, Lorenzo Rossi
{"title":"Impact of polystyrene nanoplastics on physiology, nutrient uptake, and root system architecture of aeroponically grown citrus plants.","authors":"Khalid Hussain, John-Paul Fox, Xingmao Ma, Lorenzo Rossi","doi":"10.1016/j.impact.2024.100536","DOIUrl":"https://doi.org/10.1016/j.impact.2024.100536","url":null,"abstract":"<p><p>The widespread presence of plastic pollution has become a challenge for both aquatic and terrestrial plants. Notably, nanoplastics (NPs) have been found to enter the root tissues and translocate to different organs of plants; however, most previous studies were performed using crop or vegetable seedlings, and the extent NPs accumulation in fruit tree plants, particularly citrus, and their impacts remains unclear. This study was designed to fill this gap by determining the uptake and accumulation of green, fluorescent polystyrene nanoplastics (PS-NPs) of two different sizes (20 nm and 50 nm in diameter) in citrus rootstock ('US-942') in an aeroponic system and their impact on plant growth and physiological functions, nutrient uptake, and root system architectural and anatomical traits. The 20 nm PS-NPs negatively impacted the root system architecture (total root length, root surface area, number of root forks) and nutrient contents (N, P, K, Mg, S, B, Fe, Cu, Mn) at both 15 and 30 days after treatment; however, no significant differences were recorded for growth and physiological parameters. Microscopic analysis of roots revealed that under both the PS-NPs treatments, root apoplastic barriers were fully developed near the root tips. Furthermore, PS-NPs are predominantly adhered to the root surface, and no signs of uptake and translocation were recorded in root sections. However, alterations to the external root cell layers were observed. This research sheds light on the impact of PS-NPs on plant roots and their physiology and contributes to a better understanding of these emerging pollutants on tree crop horticulture.</p>","PeriodicalId":18786,"journal":{"name":"NanoImpact","volume":"37 ","pages":"100536"},"PeriodicalIF":4.7,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142770167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Gut-lung microbiota dynamics in mice exposed to Nanoplastics 暴露于纳米塑料的小鼠肠肺微生物群动态。
IF 4.7 3区 环境科学与生态学
NanoImpact Pub Date : 2024-10-01 DOI: 10.1016/j.impact.2024.100531
Nur Kaluç , Sara Bertorello , Oğuz Kaan Tombul , Simone Baldi , Giulia Nannini , Gianluca Bartolucci , Elena Niccolai , Amedeo Amedei
{"title":"Gut-lung microbiota dynamics in mice exposed to Nanoplastics","authors":"Nur Kaluç ,&nbsp;Sara Bertorello ,&nbsp;Oğuz Kaan Tombul ,&nbsp;Simone Baldi ,&nbsp;Giulia Nannini ,&nbsp;Gianluca Bartolucci ,&nbsp;Elena Niccolai ,&nbsp;Amedeo Amedei","doi":"10.1016/j.impact.2024.100531","DOIUrl":"10.1016/j.impact.2024.100531","url":null,"abstract":"<div><div>Concern has grown over potential health effects of micro- and nanoplastics (M/NPs) exposure. There is significant interest in understanding their impact on animal and human microbiota due to its crucial role in preserving health, as research in this area is rapidly advancing. We conducted a sub-chronic exposure study involving 12 male mice, divided into two groups: a control group (<em>n</em> = 6) and a PET-NPs exposure group (n = 6). PET-NPs, administered by oral gavage at a dose of 0.5 mg/day in 0.1 ml/mice, were given daily for 28 days. Microbiota analyses were performed on lung, colon, oral cavity, and stool samples using 16S rRNA sequencing. Additionally, fecal short and medium-chain fatty acids were analyzed by GC/MS. No significant changes were observed in the fecal and oral microbiome of the treated mice, nor in the fecal fatty acid levels. However, there were prominent alterations in the colon, characterized by increased abundance of Gram-negative bacteria belonging to <em>Veillonella</em> and <em>Prevotella</em> genera, and of amino acid metabolism pathways, coupled with a decrease in <em>Lactobacillus</em>. PET-NPs ingestion caused unexpected alterations in the lung microbiome with an increase in the <em>Pseudomonas</em> and changes in microbial energy metabolism and nitrogen utilization. This study provides insights into the differential impact of PET-NPs exposure on various microbiome niches.</div></div>","PeriodicalId":18786,"journal":{"name":"NanoImpact","volume":"36 ","pages":"Article 100531"},"PeriodicalIF":4.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influences of cerium oxide nanoparticles and salinity on common bean (Phaseolus vulgaris) growth, physiology, and root system architectural and anatomical traits 纳米氧化铈颗粒和盐度对蚕豆(Phaseolus vulgaris)生长、生理以及根系结构和解剖特征的影响。
IF 4.7 3区 环境科学与生态学
NanoImpact Pub Date : 2024-10-01 DOI: 10.1016/j.impact.2024.100535
John-Paul Fox , Julio E. Quinones III , Khalid Hussain , Xingmao Ma , Lorenzo Rossi
{"title":"Influences of cerium oxide nanoparticles and salinity on common bean (Phaseolus vulgaris) growth, physiology, and root system architectural and anatomical traits","authors":"John-Paul Fox ,&nbsp;Julio E. Quinones III ,&nbsp;Khalid Hussain ,&nbsp;Xingmao Ma ,&nbsp;Lorenzo Rossi","doi":"10.1016/j.impact.2024.100535","DOIUrl":"10.1016/j.impact.2024.100535","url":null,"abstract":"<div><div>Engineered nanoparticles (ENPs) have emerged as global pollutants due to their extensive use across various industries, raising particular concerns in agricultural settings. This study addresses the understudied interactions between ENPs, specifically cerium oxide nanoparticles (CeO₂NPs), and sodium chloride (NaCl) in agricultural crops, within the context of widespread soil salinization. ‘Pinto’ common bean seedlings were cultivated in sand-filled pots under greenhouse conditions, following a completely randomized experimental design for one month. Four treatments were administered: (1) control with no NaCl and no CeO₂NPs, (2) 50 mM NaCl without CeO₂NPs, (3) 200 mg kg<sup>−1</sup> CeO₂NPs without NaCl, and (4) a combination of 50 mM NaCl and 200 mg kg<sup>−1</sup> CeO₂NPs. Weekly measurements were conducted, and a random cohort of 20 plants, including 5 from each treatment, was destructively sampled. At the experiment's conclusion, the final cohort was dissected into above- and below-ground organs to determine the concentrations of Ce and Na, and root scans were performed to analyze root system architectural traits. The results revealed significant differences in growth including root system architecture (including length, surface area, and volume), anatomical traits, biomass (fresh and dry), and vine length. Similarly, significant differences were observed in fluorescence; Ce and Na concentrations; electrolyte leakage, with the CeO<sub>2</sub>NPs + NaCl treatment having 3.3-fold more leakage than the control; and chlorophyll contents, with the CeO<sub>2</sub>NPs treatment having 3.3-fold more chlorophyll <em>a</em> than the NaCl treatment. Additionally, notable interactions between NaCl and CeO₂NPs were observed in root apoplastic barrier formation, vine length, Ce uptake, and chlorophyll content and fluorescence.</div></div>","PeriodicalId":18786,"journal":{"name":"NanoImpact","volume":"36 ","pages":"Article 100535"},"PeriodicalIF":4.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142676376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
A multi-omics approach reveals differences in toxicity and mechanisms in rice (Oryza sativa L.) exposed to anatase or rutile TiO2 nanoparticles 多组学方法揭示了暴露于锐钛型或金红石型TiO2纳米粒子的水稻(Oryza sativa L.)在毒性和机理方面的差异。
IF 4.7 3区 环境科学与生态学
NanoImpact Pub Date : 2024-10-01 DOI: 10.1016/j.impact.2024.100530
Nan Zhao , Chang Liu , Chenyang Ji , Xuefeng Jiang , Jinyu Zhao , Liwen Qiang , Hangbiao Jin
{"title":"A multi-omics approach reveals differences in toxicity and mechanisms in rice (Oryza sativa L.) exposed to anatase or rutile TiO2 nanoparticles","authors":"Nan Zhao ,&nbsp;Chang Liu ,&nbsp;Chenyang Ji ,&nbsp;Xuefeng Jiang ,&nbsp;Jinyu Zhao ,&nbsp;Liwen Qiang ,&nbsp;Hangbiao Jin","doi":"10.1016/j.impact.2024.100530","DOIUrl":"10.1016/j.impact.2024.100530","url":null,"abstract":"<div><div>Titanium dioxide nanoparticles (TiO<sub>2</sub> NPs) have been widely used in agriculture, which increased the risk to soil-plant systems. Studies have demonstrated that TiO<sub>2</sub> NPs can induce phytotoxicity. However, the toxicity mechanisms, particularly under the stress of TiO<sub>2</sub> NPs with different crystalline forms, remain inadequately reported. In this study, we combined transcriptomics and metabolomics to analyze the toxicity mechanisms in rice (<em>Oryza sativa</em> L.) under the stress of anatase (AT) or rutile (RT) TiO<sub>2</sub> NPs (50 mg/kg, 40 days). The length (decreased by 1.1-fold, <em>p</em> = 0.021) and malondialdehyde concentration (decreased by 1.4-fold, <em>p</em> = 0.0027) of rice shoots was significantly reduced after AT exposure, while no significant changes were observed following RT exposure. Antioxidant enzyme activities were significantly altered both in the AT and RT groups, indicating TiO<sub>2</sub> NPs induced rice oxidative damage (with changes of 1.1 to 1.4-fold, <em>p</em> &lt; 0.05). Additionally, compared to the control, AT exposure altered 3247 differentially expressed genes (DEGs) and 56 significantly differentially metabolites in rice (collectively involved in pyrimidine metabolism, TCA cycle, fatty acid metabolism, and amino acid metabolism). After RT exposure, 2814 DEGs and 55 significantly differentially metabolites were identified, which were collectively involved in fatty acid metabolism and amino acid metabolism. Our results indicated that AT exposure led to more pronounced changes in biological responses related to oxidative stress and had more negative effects on rice growth compared to RT exposure. These findings provide new insights into the phytotoxic mechanisms of TiO<sub>2</sub> NPs with different crystalline forms. Based on the observed adverse effects, the study emphasizes that any form of TiO<sub>2</sub> NPs should be used with caution in rice ecosystems. This study is the first to demonstrate that AT is more toxic than RT in paddy ecosystems, providing crucial insights into the differential impacts and toxic mechanisms of TiO<sub>2</sub> NPs with different crystalline forms. These findings suggest prioritizing the use of RT when TiO<sub>2</sub> NPs are necessary in agricultural development to minimize toxicity risks.</div></div>","PeriodicalId":18786,"journal":{"name":"NanoImpact","volume":"36 ","pages":"Article 100530"},"PeriodicalIF":4.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142381274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Bridging the gap: Innovative human-based in vitro approaches for nanomaterials hazard assessment and their role in safe and sustainable by design, risk assessment, and life cycle assessment 缩小差距:纳米材料危害评估的创新性人体体外方法及其在安全和可持续设计、风险评估和生命周期评估中的作用。
IF 4.7 3区 环境科学与生态学
NanoImpact Pub Date : 2024-10-01 DOI: 10.1016/j.impact.2024.100533
Jimeng Wu , Govind Gupta , Tina Buerki-Thurnherr , Bernd Nowack , Peter Wick
{"title":"Bridging the gap: Innovative human-based in vitro approaches for nanomaterials hazard assessment and their role in safe and sustainable by design, risk assessment, and life cycle assessment","authors":"Jimeng Wu ,&nbsp;Govind Gupta ,&nbsp;Tina Buerki-Thurnherr ,&nbsp;Bernd Nowack ,&nbsp;Peter Wick","doi":"10.1016/j.impact.2024.100533","DOIUrl":"10.1016/j.impact.2024.100533","url":null,"abstract":"<div><div>The application of nanomaterials in industry and consumer products is growing exponentially, which has pressed the development and use of predictive human <em>in vitro</em> models in pre-clinical analysis to closely extrapolate potential toxic effects <em>in vivo</em>. The conventional cytotoxicity investigation of nanomaterials using cell lines from cancer origin and culturing them two-dimensionally in a monolayer without mimicking the proper pathophysiological microenvironment may affect a precise prediction of <em>in vitro</em> effects at <em>in vivo</em> level. In recent years, complex <em>in vitro</em> models (also belonging to the new approach methodologies, NAMs) have been established in unicellular to multicellular cultures either by using cell lines, primary cells or induced pluripotent stem cells (iPSCs), and reconstituted into relevant biological dimensions mimicking <em>in vivo</em> conditions. These advanced <em>in vitro</em> models retain physiologically reliant exposure scenarios particularly appropriate for oral, dermal, respiratory, and intravenous administration of nanomaterials, which have the potential to improve the <em>in vivo</em> predictability and lead to reliable outcomes. In this perspective, we discuss recent developments and breakthroughs in using advanced human <em>in vitro</em> models for hazard assessment of nanomaterials. We identified fit-for-purpose requirements and remaining challenges for the successful implementation of <em>in vitro</em> data into nanomaterials Safe and Sustainable by Design (SSbD), Risk Assessment (RA), and Life Cycle Assessment (LCA). By addressing the gap between <em>in vitro</em> data generation and the utility of <em>in vitro</em> data for nanomaterial safety assessments, a prerequisite for SSbD approaches, we outlined potential key areas for future development.</div></div>","PeriodicalId":18786,"journal":{"name":"NanoImpact","volume":"36 ","pages":"Article 100533"},"PeriodicalIF":4.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Leveraging nanoparticle environmental health and safety research in the study of micro- and nano-plastics 在微塑料和纳米塑料研究中利用纳米粒子环境健康和安全研究。
IF 4.7 3区 环境科学与生态学
NanoImpact Pub Date : 2024-10-01 DOI: 10.1016/j.impact.2024.100534
Melanie Auffan , Gregory V. Lowry , Jaleesia D. Amos , Nathan Bossa , Mark R. Wiesner
{"title":"Leveraging nanoparticle environmental health and safety research in the study of micro- and nano-plastics","authors":"Melanie Auffan ,&nbsp;Gregory V. Lowry ,&nbsp;Jaleesia D. Amos ,&nbsp;Nathan Bossa ,&nbsp;Mark R. Wiesner","doi":"10.1016/j.impact.2024.100534","DOIUrl":"10.1016/j.impact.2024.100534","url":null,"abstract":"<div><div>Lessons learned, methodologies, and application of tools that have been developed within the context of research on the environmental impacts, health, and safety of nanomaterials (nano-EHS) provide a solid foundation for research on nano/microplastics. In this communication, we summarize key discoveries obtained through major research efforts over the last two decades in the area of nano-EHS that are applicable for the study of micro- and nano-plastics (referred to here more generally as particulate plastics). We focus on how non-equilibrium particle transport processes affect: 1) bio-physico-chemical mechanisms of particle toxicity and determining dose-response relationships; 2) the potential for biouptake, bioaccumulation, translocation, trophic transfer and intergenerational effects of particulate contaminants; 3) extrapolations from laboratory experiments to complex systems and the impact of environmental transformations; 4) the formulation of functional assays as a basis for predicting the impacts of particulate contaminants in complex environments; 5) the relative importance of incidental particles compared with engineered particles and, 6) experience with data platforms, curation, and experimental design.</div></div>","PeriodicalId":18786,"journal":{"name":"NanoImpact","volume":"36 ","pages":"Article 100534"},"PeriodicalIF":4.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142648278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Biodistribution and toxic potential of silver nanoparticles when introduced to the female rat reproductive tract 银纳米粒子进入雌性大鼠生殖道时的生物分布和毒性潜力。
IF 4.7 3区 环境科学与生态学
NanoImpact Pub Date : 2024-10-01 DOI: 10.1016/j.impact.2024.100529
Nathan A. Koonce , Ammu Mathew , Ioana-Mihaela Popescu , Kelly Davis , Doug Wagner , Gokulan Kuppan , Mugimane Manjanatha , Julian E.A. Leakey , Anil K. Patri
{"title":"Biodistribution and toxic potential of silver nanoparticles when introduced to the female rat reproductive tract","authors":"Nathan A. Koonce ,&nbsp;Ammu Mathew ,&nbsp;Ioana-Mihaela Popescu ,&nbsp;Kelly Davis ,&nbsp;Doug Wagner ,&nbsp;Gokulan Kuppan ,&nbsp;Mugimane Manjanatha ,&nbsp;Julian E.A. Leakey ,&nbsp;Anil K. Patri","doi":"10.1016/j.impact.2024.100529","DOIUrl":"10.1016/j.impact.2024.100529","url":null,"abstract":"<div><div>The prevalence of ionic silver and silver nanomaterials in hygiene products has been increasing due to their antimicrobial activity. While numerous studies have examined the effects of nanosilver in laboratory settings, there is a limited understanding of its impact on reproductive tissues, as well as its biodistribution and toxicity upon intra-vaginal exposure. If ionic or nanosilver enters adjacent and internal tissues via intra-vaginal exposure, the overuse of hygiene products containing silver may potentially threaten woman's health. This study investigated the effects of intra-vaginal silver exposure in Female Fischer 344 rats to single and multiple doses of a commercial product containing silver, along with standard nanosilver materials. Custom tampons were developed to simulate practical usage scenarios. The analysis of tissue biodistribution revealed that epithelial penetration and redistribution of silver was observed with most administered silver eliminated in feces (8–44 %), and secondary tissues containing 1–18 % of the dose, predominantly localized in the reproductive tract. In a subsequent toxicity study, vaginal histopathology indicated a cellular inflammatory reaction (neutrophil infiltration) associated with the presence of foreign silver material upon a single administration. Interestingly, no noticeable difference in histopathology incidence was observed upon multiple exposures to silver compared to the control group. Clinical chemistry and hematology analyses following acute exposure to silver nanomaterials showed no significant abnormalities. Overall, acute vaginal exposure to silver nanomaterials and ionic silver resulted in limited silver persistence, local tissue reactivity, epithelial penetration of silver resulting in accumulation in distant organs, and elimination primarily through feces. In vitro data suggested potential alterations in normal vaginal flora. Long-term studies are still lacking in this area.</div></div>","PeriodicalId":18786,"journal":{"name":"NanoImpact","volume":"36 ","pages":"Article 100529"},"PeriodicalIF":4.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142308085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Response to shock load of titanium dioxide nanoparticles on aerobic granular sludge and algal-bacterial granular sludge processes 二氧化钛纳米颗粒对好氧颗粒污泥和藻菌颗粒污泥工艺的冲击负荷响应。
IF 4.7 3区 环境科学与生态学
NanoImpact Pub Date : 2024-10-01 DOI: 10.1016/j.impact.2024.100532
Alfonz Kedves , Çağdaş Yavuz , Orsolya Kedves , Henrik Haspel , Zoltán Kónya
{"title":"Response to shock load of titanium dioxide nanoparticles on aerobic granular sludge and algal-bacterial granular sludge processes","authors":"Alfonz Kedves ,&nbsp;Çağdaş Yavuz ,&nbsp;Orsolya Kedves ,&nbsp;Henrik Haspel ,&nbsp;Zoltán Kónya","doi":"10.1016/j.impact.2024.100532","DOIUrl":"10.1016/j.impact.2024.100532","url":null,"abstract":"<div><div>Titanium dioxide nanoparticles (TiO<sub>2</sub> NPs) are extensively used in various fields and can consequently be detected in wastewater, making it necessary to study their potential impacts on biological wastewater treatment processes. In this study, the shock-load impacts of TiO<sub>2</sub> NPs were investigated at concentrations ranging between 1 and 200 mg L<sup>−1</sup> on nutrient removal, extracellular polymeric substances (EPSs), microbial activity in aerobic granular sludge (AGS), and algal-bacterial granular sludge (AB-AGS) bioreactors. The results indicated that low concentration (≤10 mg L<sup>−1</sup>) TiO<sub>2</sub> NPs had no effect on microbial activity or the removal of chemical oxygen demand (COD), nitrogen, and phosphorus, due to the increased production of extracellular polymeric substances (EPSs) in the sludge. In contrast, the performance of both AGS and AB-AGS bioreactors gradually deteriorated as the concentration of TiO<sub>2</sub> NPs in the influent increased to 50, 100, and 200 mg L<sup>−1</sup>. Specifically, the ammonia‑nitrogen removal rate in AGS decreased from 99.9 % to 88.6 %, while in AB-AGS it dropped to 91.3 % at 200 mg L<sup>−1</sup> TiO<sub>2</sub> NPs. Furthermore, the nitrate‑nitrogen levels remained stable in AB-AGS, while NO<sub>3</sub>-N was detected in the effluent of AGS at 100 and 200 mg L<sup>−1</sup>. Microbial activities change similarly as smaller decrease in the specific ammonia uptake rate (SAUR) and specific nitrate uptake rate (SNUR) was found in AB-AGS compared to those in AGS. Overall, the algal-bacterial sludge exhibited higher resilience against TiO<sub>2</sub> NPs, which was attributed to a) higher EPS volume, b) smaller decrease in LB-EPS, and c) the favorable protein to polysaccharide (PN/PS) ratio. This in turn, along with the symbiotic relationship between the algae and bacteria, mitigates the toxic effects of nanoparticles.</div></div>","PeriodicalId":18786,"journal":{"name":"NanoImpact","volume":"36 ","pages":"Article 100532"},"PeriodicalIF":4.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Toxicity and decomposition activity inhibition of VO2 micro/nanoparticles to white rot fungus Phanerochaete chrysosporium VO2 微/纳米粒子对白腐菌 Phanerochaete chrysosporium 的毒性和分解活性抑制作用。
IF 4.7 3区 环境科学与生态学
NanoImpact Pub Date : 2024-09-01 DOI: 10.1016/j.impact.2024.100528
Qiangqiang Zhang , Yue Yuan , Yunxuan Hu , Richard L. Lu , Xiting Wang , Qinmei Zhong , Xian Wu , Haifang Wang , Sheng-Tao Yang
{"title":"Toxicity and decomposition activity inhibition of VO2 micro/nanoparticles to white rot fungus Phanerochaete chrysosporium","authors":"Qiangqiang Zhang ,&nbsp;Yue Yuan ,&nbsp;Yunxuan Hu ,&nbsp;Richard L. Lu ,&nbsp;Xiting Wang ,&nbsp;Qinmei Zhong ,&nbsp;Xian Wu ,&nbsp;Haifang Wang ,&nbsp;Sheng-Tao Yang","doi":"10.1016/j.impact.2024.100528","DOIUrl":"10.1016/j.impact.2024.100528","url":null,"abstract":"<div><p>Vanadium dioxide (VO<sub>2</sub>) is an excellent phase transition material widely used in various applications, and thus inevitably enters the environment via different routes and encounters various organisms. Nonetheless, limited information is available on the environmental hazards of VO<sub>2</sub>. In this study, we investigated the impact of two commercial VO<sub>2</sub> particles, nanosized S-VO<sub>2</sub> and micro-sized M-VO<sub>2</sub> on the white rot fungus <em>Phanerochaete chrysosporium</em>. The growth of <em>P. chrysosporium</em> is significantly affected by VO<sub>2</sub> particles, with S-VO<sub>2</sub> displaying a higher inhibitory effect on weight gain. In addition, VO<sub>2</sub> at high concentrations inhibits the formation of fungal fibrous hyphae and disrupts the integrity of fungus cells as evidenced by the cell membrane damage and the loss of cytoplasm. Notably, at 200 μg/mL, S-VO<sub>2</sub> completely alters the morphology of <em>P. chrysosporium</em>, while the M-VO<sub>2</sub> treatment does not affect the mycelium formation of <em>P. chrysosporium</em>. Additionally, VO<sub>2</sub> particles inhibit the laccase activity secreted by <em>P. chrysosporium</em>, and thus prevent the dye decoloration and sawdust decomposition by <em>P. chrysosporium</em>. The mechanism underlying this toxicity is related to the dissolution of VO<sub>2</sub> and the oxidative stress induced by VO<sub>2</sub>. Overall, our findings suggest that VO<sub>2</sub> nanoparticles pose significant environmental hazards and risks to white rot fungi.</p></div>","PeriodicalId":18786,"journal":{"name":"NanoImpact","volume":"36 ","pages":"Article 100528"},"PeriodicalIF":4.7,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142126161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Dancing with danger-how honeybees are getting affected in the web of microplastics-a review 与危险共舞--微塑料网如何影响蜜蜂--综述。
IF 4.7 3区 环境科学与生态学
NanoImpact Pub Date : 2024-07-01 DOI: 10.1016/j.impact.2024.100522
Sadaf Bashir , Pritha Ghosh , Priyanka Lal
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