Advances and applications of nanotechnology inevitably lead to the release of nanoparticles (NPs) into the environment, particularly zinc oxide nanoparticles (nZnO). This review focuses on the toxic and nutritional effects of nZnO at both cellular and physiological levels, as well as the corresponding molecular mechanisms involved. Understanding the cellular transport and dissolution characteristics of nZnO is essential to elucidate its potential toxicity mechanisms. Excess nZnO is absorbed into tissues and accumulates in cells, ultimately resulting in physiological inhibition, nutritional imbalances, and oxidative stress. Conversely, an appropriate amount of nZnO may enhance homeostasis at the organ level, induce moderate production of reactive oxygen species (ROS), and activate changes in antioxidant genes and KEGG pathways, thereby improving the anti-stress capacity of organisms. We also examine the fate of nZnO in marine fishes at the physiological and molecular levels. The effects of nZnO exposure are complex, exhibiting both potential mitigation and toxicity. While excessive use of nZnO poses ecological risks, a judiciously designed application of nZnO holds promise for various fields, including marine fish farming. The regulatory role of nZnO in fish organs, such as viscera and liver, provides new insights into the mechanisms underlying its benefits at the individual level, informing strategies to minimize risks while maximizing benefits.
{"title":"Two-Sided Cellular and Physiological Effects of Zinc Oxide Nanoparticles (nZnO): A Critical Review","authors":"Anqi Sun, Shuoli Ma, Wen-Xiong Wang","doi":"10.1039/d4en00676c","DOIUrl":"https://doi.org/10.1039/d4en00676c","url":null,"abstract":"Advances and applications of nanotechnology inevitably lead to the release of nanoparticles (NPs) into the environment, particularly zinc oxide nanoparticles (nZnO). This review focuses on the toxic and nutritional effects of nZnO at both cellular and physiological levels, as well as the corresponding molecular mechanisms involved. Understanding the cellular transport and dissolution characteristics of nZnO is essential to elucidate its potential toxicity mechanisms. Excess nZnO is absorbed into tissues and accumulates in cells, ultimately resulting in physiological inhibition, nutritional imbalances, and oxidative stress. Conversely, an appropriate amount of nZnO may enhance homeostasis at the organ level, induce moderate production of reactive oxygen species (ROS), and activate changes in antioxidant genes and KEGG pathways, thereby improving the anti-stress capacity of organisms. We also examine the fate of nZnO in marine fishes at the physiological and molecular levels. The effects of nZnO exposure are complex, exhibiting both potential mitigation and toxicity. While excessive use of nZnO poses ecological risks, a judiciously designed application of nZnO holds promise for various fields, including marine fish farming. The regulatory role of nZnO in fish organs, such as viscera and liver, provides new insights into the mechanisms underlying its benefits at the individual level, informing strategies to minimize risks while maximizing benefits.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"9 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142599956","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}
Bimetallic Ni/Fe-nanoparticles has been developed to enhance the dechlorination reactivity of nano-sized zero-valent iron. The physical structures of Ni/Fe-NPs with Ni loading ranged from 0.5wt% to 20wt% and the structure dependent reactivity variation towards to trichloroethene (TCE) and carbon tetrachloride (CT) have been fully investigated. A Ni-accumulated surface can be observed for the Ni/Fe-NPs with high Ni loading (20 wt.%), and the structure of other Ni/Fe NPs were identified as a Ni/Fe alloy-like structure with 5wt% Ni/Fe NPs owning the highest surface area and Fe0 content. While the best CT dechlorination rate was 2.5-fold of B-nZVI at 5wt% Ni loading, the best TCE reduction was 12-fold of B-nZVI at medium Ni loading (3wt%-5wt%). Since the primary TCE degradation mechanism is via atomic hydrogen (H*) whereas degradation of CT proceeds via direct electron transfer, the more efficient reduction mechanism for the Ni/Fe NP system was preferably H* reduction. The reduction-rate and the by-products yield variation between medium loading((3wt%-5wt%) and low/high (0.5wt%,20wt%) loading was more significant for TCE than CT. It has been found that Medium Ni loading (3wt%- 5wt%) obviously boosted the β-elimination of TCE to VC due to good storage of H* in Ni catalyst. The production of H* and enhanced electron migration rate were well demonstrated by CV curve and Tafel curve, respectively. The occurrence location of direct electron transfer and H* catalyst in bimetallic Ni/Fe system was further discussed.
{"title":"Influence of nickel loading on reactivity of Ni/Fe bimetallic nanoparticles toward trichloroethene and carbon tetrachloride","authors":"Caijie WEI, Weizhong Wu, xufei zhao, Cheng Sun, Zehan Shi, jun Yang, Ming-Hong Wu","doi":"10.1039/d4en00426d","DOIUrl":"https://doi.org/10.1039/d4en00426d","url":null,"abstract":"Bimetallic Ni/Fe-nanoparticles has been developed to enhance the dechlorination reactivity of nano-sized zero-valent iron. The physical structures of Ni/Fe-NPs with Ni loading ranged from 0.5wt% to 20wt% and the structure dependent reactivity variation towards to trichloroethene (TCE) and carbon tetrachloride (CT) have been fully investigated. A Ni-accumulated surface can be observed for the Ni/Fe-NPs with high Ni loading (20 wt.%), and the structure of other Ni/Fe NPs were identified as a Ni/Fe alloy-like structure with 5wt% Ni/Fe NPs owning the highest surface area and Fe0 content. While the best CT dechlorination rate was 2.5-fold of B-nZVI at 5wt% Ni loading, the best TCE reduction was 12-fold of B-nZVI at medium Ni loading (3wt%-5wt%). Since the primary TCE degradation mechanism is via atomic hydrogen (H*) whereas degradation of CT proceeds via direct electron transfer, the more efficient reduction mechanism for the Ni/Fe NP system was preferably H* reduction. The reduction-rate and the by-products yield variation between medium loading((3wt%-5wt%) and low/high (0.5wt%,20wt%) loading was more significant for TCE than CT. It has been found that Medium Ni loading (3wt%- 5wt%) obviously boosted the β-elimination of TCE to VC due to good storage of H* in Ni catalyst. The production of H* and enhanced electron migration rate were well demonstrated by CV curve and Tafel curve, respectively. The occurrence location of direct electron transfer and H* catalyst in bimetallic Ni/Fe system was further discussed.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"24 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142599952","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}
Electrochemical oxidation (EO) for the removal of antibiotics is a promising technique because of green and sustainable electrical−to−chemical energy conversion. However, the interaction mechanism between different electrolytes molecule and organic pollution along with the generation pathway of reactive oxygen species remain unclear. Here, the β−PbO2 electrode was successfully prepared and employed as an effective tool for organic pollution removal. The EO process with β−PbO2 electrode and Na2SO4 electrolyte could completely remove tetracycline (TC) and achieve an impressive kinetic rate constant of 0.239 min−1. Quantum chemical calculations confirmed that hydrogen bonding was the primary binding force between TC and Na2SO4. Density functional theory calculations emphasized the key roles of radical and non−radical pathways in TC removal via the key reaction site (O atom in PbO2). Consequently, this study provided a novel insight into the intrinsic electrochemical behavior changes under various electrolyte, paving the way for novel electrochemical process in water treatment applications.
电化学氧化法（EO）可将电能转化为化学能，是一种绿色、可持续的去除抗生素的技术。然而，不同电解质分子与有机污染之间的相互作用机制以及活性氧的生成途径仍不清楚。在此，我们成功制备了β-PbO2电极，并将其用作去除有机污染的有效工具。使用β-PbO2电极和Na2SO4电解液的环氧乙烷过程可以完全去除四环素（TC），并达到了令人印象深刻的0.239 min-1动力学速率常数。量子化学计算证实，氢键是四环素与 Na2SO4 之间的主要结合力。密度泛函理论计算强调了通过关键反应位点（PbO2 中的 O 原子）去除 TC 的自由基和非自由基途径的关键作用。因此，这项研究为了解不同电解质下的内在电化学行为变化提供了新的视角，为新型电化学工艺在水处理中的应用铺平了道路。
{"title":"Unveiling intrinsic electrochemical mechanism of supporting electrolyte and interaction mechanism in electrochemical oxidation tetracycline with nano-PbO2","authors":"Yaxuan Wang, Peitong Cen, Hongyu Wang, Chenxi Li, Ziyin Xia, Guoqing Wu, Meng Li, Lei Huang, Jia Yan, Shaoqi Zhou, Ce-Hui Mo, Hongguo Zhang","doi":"10.1039/d4en00842a","DOIUrl":"https://doi.org/10.1039/d4en00842a","url":null,"abstract":"Electrochemical oxidation (EO) for the removal of antibiotics is a promising technique because of green and sustainable electrical−to−chemical energy conversion. However, the interaction mechanism between different electrolytes molecule and organic pollution along with the generation pathway of reactive oxygen species remain unclear. Here, the β−PbO2 electrode was successfully prepared and employed as an effective tool for organic pollution removal. The EO process with β−PbO2 electrode and Na2SO4 electrolyte could completely remove tetracycline (TC) and achieve an impressive kinetic rate constant of 0.239 min−1. Quantum chemical calculations confirmed that hydrogen bonding was the primary binding force between TC and Na2SO4. Density functional theory calculations emphasized the key roles of radical and non−radical pathways in TC removal via the key reaction site (O atom in PbO2). Consequently, this study provided a novel insight into the intrinsic electrochemical behavior changes under various electrolyte, paving the way for novel electrochemical process in water treatment applications.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"41 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601234","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}
Metal-based nanoparticles (NPs) have garnered attention as a potential micronutrient nano-fertilizer. Most studies have focused on the effects of individual NP size on environmental risks and the uptake, translocation, and biological progress of NPs in plants. However, there is a lack of research on the effects of NPs of different sizes and their interactions with the nanoscale layers of plant leaves (hereafter, nanosheets), which may affect adhesion ability, anti-leaching properties, release rate, and fertilizer efficiency. In this study, various sizes (10, 20, 50, 100 nm, and 10 μm) of Fe3O4-NPs (Fe3O4-NPs) were applied to peanut (Fe strategy I, dicotyledon) and maize (Fe strategy II, monocotyledon) leaves to quantitatively compare their fertilization efficiency and anti-leaching effects. The optimal size for different crop leaves differed due to the distinct microstructures of the nanosheets on the leaf surface. In peanut, the optimal size was 50 nm, resulting in superior dry weight (1.32 g per plant), leaf iron concentration (483 μg g−1 DW), and adhesion amount (0.039 mg per plant). For maize, the optimal size was found to be 100 nm, leading to increased dry weight (1.98 g per plant), leaf iron concentration (258 μg g−1 DW), and adhesion amount (0.061 mg per plant). A model was developed to simulate the force and work exerted by Fe3O4-NPs of different sizes on leaf nanosheets, resulting in the optimal size consistent with the experimental findings. These findings will guide the selection of the optimized NP size for different leaves, thereby enhancing the efficiency of nano-fertilizer utilization and facilitating the development of new types of nano-fertilizers.
{"title":"Optimal size of Fe3O4 nanoparticles for different crops depends on the unique nanoscale microstructure of plant leaves under rainy conditions","authors":"Lingyun Chen, Wanru Qing, Xiaoxiao Li, Wenhui Chen, Can Hao, Dunyi Liu, Xinping Chen","doi":"10.1039/d4en00753k","DOIUrl":"https://doi.org/10.1039/d4en00753k","url":null,"abstract":"Metal-based nanoparticles (NPs) have garnered attention as a potential micronutrient nano-fertilizer. Most studies have focused on the effects of individual NP size on environmental risks and the uptake, translocation, and biological progress of NPs in plants. However, there is a lack of research on the effects of NPs of different sizes and their interactions with the nanoscale layers of plant leaves (hereafter, nanosheets), which may affect adhesion ability, anti-leaching properties, release rate, and fertilizer efficiency. In this study, various sizes (10, 20, 50, 100 nm, and 10 μm) of Fe<small><sub>3</sub></small>O<small><sub>4</sub></small>-NPs (Fe<small><sub>3</sub></small>O<small><sub>4</sub></small>-NPs) were applied to peanut (Fe strategy I, dicotyledon) and maize (Fe strategy II, monocotyledon) leaves to quantitatively compare their fertilization efficiency and anti-leaching effects. The optimal size for different crop leaves differed due to the distinct microstructures of the nanosheets on the leaf surface. In peanut, the optimal size was 50 nm, resulting in superior dry weight (1.32 g per plant), leaf iron concentration (483 μg g<small><sup>−1</sup></small> DW), and adhesion amount (0.039 mg per plant). For maize, the optimal size was found to be 100 nm, leading to increased dry weight (1.98 g per plant), leaf iron concentration (258 μg g<small><sup>−1</sup></small> DW), and adhesion amount (0.061 mg per plant). A model was developed to simulate the force and work exerted by Fe<small><sub>3</sub></small>O<small><sub>4</sub></small>-NPs of different sizes on leaf nanosheets, resulting in the optimal size consistent with the experimental findings. These findings will guide the selection of the optimized NP size for different leaves, thereby enhancing the efficiency of nano-fertilizer utilization and facilitating the development of new types of nano-fertilizers.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"17 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594378","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}
There is growing concern about the threat that nanoplastics (NPs) pose to ecosystems. However, a comprehensive risk assessment of NPs is currently constrained by the paucity of knowledge on the chemical reactivity of NPs, which were previously thought to be chemically inert. This review identifies the chemical reactivity of NPs that have undergone abiotic and biotic weathering, including the formation of free radicals, the increase in the content of oxygen-containing functional groups, and the release of plastic leachates. Their interaction with legacy contaminants, such as heavy metals (HMs), is then examined, highlighting their critical role in the oxidation and reduction of HMs, through free radical-mediated redox processes and electron shuttling by carbonyl groups. This review offers new insights into the risk of NPs, where their interaction with legacy contaminants determines the long-term exposure scenario for ecosystems. The unexpectedly large pool of reactive NPs in nature will not only affect their risks but also impact the biogeochemistry of HMs and other contaminants that could react with free radicals and carbonyl groups.
{"title":"Chemical Reactivity of Weathered Nanoplastics and Their Interactions with Heavy Metals","authors":"Yingnan Huang, Fei Dang, Yujun Wang","doi":"10.1039/d4en00801d","DOIUrl":"https://doi.org/10.1039/d4en00801d","url":null,"abstract":"There is growing concern about the threat that nanoplastics (NPs) pose to ecosystems. However, a comprehensive risk assessment of NPs is currently constrained by the paucity of knowledge on the chemical reactivity of NPs, which were previously thought to be chemically inert. This review identifies the chemical reactivity of NPs that have undergone abiotic and biotic weathering, including the formation of free radicals, the increase in the content of oxygen-containing functional groups, and the release of plastic leachates. Their interaction with legacy contaminants, such as heavy metals (HMs), is then examined, highlighting their critical role in the oxidation and reduction of HMs, through free radical-mediated redox processes and electron shuttling by carbonyl groups. This review offers new insights into the risk of NPs, where their interaction with legacy contaminants determines the long-term exposure scenario for ecosystems. The unexpectedly large pool of reactive NPs in nature will not only affect their risks but also impact the biogeochemistry of HMs and other contaminants that could react with free radicals and carbonyl groups.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"44 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142589202","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}
Photocatalysis offers a promising avenue for completely mutilate harmful algal blooms (HABs), a significant threat to global freshwater reserves. In this study, a series of BiOBrxI1-x photocatalysts were synthesized and the most optimal catalyst was integrated with pristine g-C3N4 and pre-synthesized CoFe2O4/g-C3N4 and NiFe2O4/g-C3N4 to form binary and ternary composite heterojunction photocatalysts (BiOBr0.95I0.05/g-C3N4 - BG, CoFe2O4/BiOBr0.95I0.05/g-C3N4 - CBG, and NiFe2O4/BiOBr0.95I0.05/g-C3N4 - NBG). Synthesized photocatalysts were thoroughly characterized and their performance was evaluated through the visible light driven photocatalytic degradation of both Microcystis aeruginosa (prokaryotic) and Scenedesmus acuminatus (eukaryotic) algal cells sourced directly from ponds. Exceptional photocatalytic efficiency of CBG evidenced through the variation in chlorophyll-a content, malondialdehyde, and electrolytic leakage confirmed the complete rupture of the algal cells after 3 h of light exposure. This was further reconfirmed through fluorescent microscopy analysis and interestingly, both HABs failed to re-grow even after 10 days. Enhanced performance of CBG was attributed to the boosted generation of charge carriers facilitated by its extended visible light absorption, which in-turn produced reactive oxygen species (•O2- and •OH radicals) that caused irreparable oxidative damage to algal cells, while effectively suppressing the exciton pair recombination supported by its double Z-scheme heterojunction. Furthermore, magnetic recyclability feature of CBG facilitated their easy removal from treated water for avoiding secondary pollution. Design of magnetically recyclable photocatalysts for degrading both prokaryotic and eukaryotic HABs demonstrated here is anticipated to inspire the development of efficient photocatalysts and design cost-effective solutions required for treating ponds and lakes infected with HABs.
{"title":"Combating Eukaryotic and Prokaryotic Harmful Algal Blooms with Visible-Light Driven BiOBrxI1-x/MFe2O4/g-C3N4 (M = Co & Ni) Recyclable Photocatalysts","authors":"Anjitha A, Shijina Kottarathil, Ajayan KV, Sindhu Swaminathan, Irene M.C. Lo, Kishore Sridharan","doi":"10.1039/d4en00955j","DOIUrl":"https://doi.org/10.1039/d4en00955j","url":null,"abstract":"Photocatalysis offers a promising avenue for completely mutilate harmful algal blooms (HABs), a significant threat to global freshwater reserves. In this study, a series of BiOBr<small><sub>x</sub></small>I<small><sub>1-x</sub></small> photocatalysts were synthesized and the most optimal catalyst was integrated with pristine g-C<small><sub>3</sub></small>N<small><sub>4</sub></small> and pre-synthesized CoFe<small><sub>2</sub></small>O<small><sub>4</sub></small>/g-C<small><sub>3</sub></small>N<small><sub>4</sub></small> and NiFe<small><sub>2</sub></small>O<small><sub>4</sub></small>/g-C<small><sub>3</sub></small>N<small><sub>4</sub></small> to form binary and ternary composite heterojunction photocatalysts (BiOBr<small><sub>0.95</sub></small>I<small><sub>0.05</sub></small>/g-C<small><sub>3</sub></small>N<small><sub>4</sub></small> - BG, CoFe<small><sub>2</sub></small>O<small><sub>4</sub></small>/BiOBr<small><sub>0.95</sub></small>I<small><sub>0.05</sub></small>/g-C<small><sub>3</sub></small>N<small><sub>4</sub></small> - CBG, and NiFe<small><sub>2</sub></small>O<small><sub>4</sub></small>/BiOBr<small><sub>0.95</sub></small>I<small><sub>0.05</sub></small>/g-C<small><sub>3</sub></small>N<small><sub>4</sub></small> - NBG). Synthesized photocatalysts were thoroughly characterized and their performance was evaluated through the visible light driven photocatalytic degradation of both Microcystis aeruginosa (prokaryotic) and Scenedesmus acuminatus (eukaryotic) algal cells sourced directly from ponds. Exceptional photocatalytic efficiency of CBG evidenced through the variation in chlorophyll-a content, malondialdehyde, and electrolytic leakage confirmed the complete rupture of the algal cells after 3 h of light exposure. This was further reconfirmed through fluorescent microscopy analysis and interestingly, both HABs failed to re-grow even after 10 days. Enhanced performance of CBG was attributed to the boosted generation of charge carriers facilitated by its extended visible light absorption, which in-turn produced reactive oxygen species (<small><sup>•</sup></small>O<small><sub>2</sub></small><small><sup>-</sup></small> and <small><sup>•</sup></small>OH radicals) that caused irreparable oxidative damage to algal cells, while effectively suppressing the exciton pair recombination supported by its double Z-scheme heterojunction. Furthermore, magnetic recyclability feature of CBG facilitated their easy removal from treated water for avoiding secondary pollution. Design of magnetically recyclable photocatalysts for degrading both prokaryotic and eukaryotic HABs demonstrated here is anticipated to inspire the development of efficient photocatalysts and design cost-effective solutions required for treating ponds and lakes infected with HABs.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"18 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580705","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}
Vanessa Takeshita, Felipe F. Oliveira, Alvaro Garcia, Nubia Zuverza-Mena, Carlos Tamez, Brian Cintra Cardoso, Camila Werk de Pinácio, Blaire Steven, Jacquelyn LaReau, Carlos E. Astete, Christina M Sabliov, Leonardo Fernandes Fraceto, Valdemar Luiz Tornisielo, Christian Dimkpa, Jason C. White
Several studies have reported improved weed control and targeted delivery of herbicides by nanocarriers. However, the effects on crops and non-target organisms need to be considered. Here, we investigate the crop and soil health treated with metribuzin in conventional and biodegradable nanoformulations (poly-ε-caprolactone - PCL and lignin-PCL) (both at 480 g a.i. ha-1). Weed control of Amaranthus retroflexus by the nanoformulations was also evaluated as a measurement of target delivery. Soybean plants did not show any differences in photosynthetic parameters and a slight oxidative stress with nanoherbicide treatment, with biomass reduction occurred at 60 days after application. The root accumulated metribuzin formulations and translocated to the aerial part for both plant species. The polymeric nanomaterials in the soil mitigated alterations in the bacterial community. Metribuzin formulations, mainly nanoformulations even at low dose (48 g a.i. ha-1) caused severe photosynthetic damage in the weed species, with reduction of chlorophyll content (up to 2.35 time) and electron flow (up to 9.22 times), leading to eventual mortality. MTZ nanoformulations presented a greater efficacy (even in 10-fold less dose) for weed control compared to conventional formulation. These findings suggest that MTZ nanoformulations improve weed control and attenuate the negative effects on crop and soil health, offering an important nano-enabled strategy for sustainable weed management.
{"title":"Delivering metribuzin from biodegradable nanocarriers: Assessing herbicidal effects for soybean plant protection and weed control","authors":"Vanessa Takeshita, Felipe F. Oliveira, Alvaro Garcia, Nubia Zuverza-Mena, Carlos Tamez, Brian Cintra Cardoso, Camila Werk de Pinácio, Blaire Steven, Jacquelyn LaReau, Carlos E. Astete, Christina M Sabliov, Leonardo Fernandes Fraceto, Valdemar Luiz Tornisielo, Christian Dimkpa, Jason C. White","doi":"10.1039/d4en00784k","DOIUrl":"https://doi.org/10.1039/d4en00784k","url":null,"abstract":"Several studies have reported improved weed control and targeted delivery of herbicides by nanocarriers. However, the effects on crops and non-target organisms need to be considered. Here, we investigate the crop and soil health treated with metribuzin in conventional and biodegradable nanoformulations (poly-ε-caprolactone - PCL and lignin-PCL) (both at 480 g a.i. ha-1<small><sup></sup></small>). Weed control of Amaranthus retroflexus by the nanoformulations was also evaluated as a measurement of target delivery. Soybean plants did not show any differences in photosynthetic parameters and a slight oxidative stress with nanoherbicide treatment, with biomass reduction occurred at 60 days after application. The root accumulated metribuzin formulations and translocated to the aerial part for both plant species. The polymeric nanomaterials in the soil mitigated alterations in the bacterial community. Metribuzin formulations, mainly nanoformulations even at low dose (48 g a.i. ha-1<small><sup></sup></small>) caused severe photosynthetic damage in the weed species, with reduction of chlorophyll content (up to 2.35 time) and electron flow (up to 9.22 times), leading to eventual mortality. MTZ nanoformulations presented a greater efficacy (even in 10-fold less dose) for weed control compared to conventional formulation. These findings suggest that MTZ nanoformulations improve weed control and attenuate the negative effects on crop and soil health, offering an important nano-enabled strategy for sustainable weed management.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"97 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594380","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}
Vincent Noël, Naresh Kumar, Kristin Boye, Lilia Barragan, Juan S. Lezama-Pacheco, Rosalie Chu, Nikola Tolic, Gordon E. Brown and John R. Bargar
Correction for ‘FeS colloids – formation and mobilization pathways in natural waters’ by Vincent Noël et al., Environ. Sci.: Nano, 2020, 7, 2102–2116, https://doi.org/10.1039/C9EN01427F.
{"title":"Correction: FeS colloids – formation and mobilization pathways in natural waters","authors":"Vincent Noël, Naresh Kumar, Kristin Boye, Lilia Barragan, Juan S. Lezama-Pacheco, Rosalie Chu, Nikola Tolic, Gordon E. Brown and John R. Bargar","doi":"10.1039/D4EN90048K","DOIUrl":"10.1039/D4EN90048K","url":null,"abstract":"<p >Correction for ‘FeS colloids – formation and mobilization pathways in natural waters’ by Vincent Noël <em>et al.</em>, <em>Environ. Sci.: Nano</em>, 2020, <strong>7</strong>, 2102–2116, https://doi.org/10.1039/C9EN01427F.</p>","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":" 12","pages":" 4862-4863"},"PeriodicalIF":5.8,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/en/d4en90048k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Haotian Wu, Runduo Zhang, Bin Kang, Xiaonan Guo, Zhaoying Di, Kun Wang, Jingbo Jia, Ying Wei, Zhou-Jun Wang
Ozone is a pollutant that has received widespread attention in recent years, and manganese dioxide (MnO2) has been widely used for ozone catalytic decomposition. However, few studies have described the structural-activity correlation of different types morphological of MnO2. In this study, series of MnO2 crystals (α-, β-, γ-, δ-, ε-and λ-MnO2) were synthesized, and their catalytic activities on ozone decomposition (25 oC, dry air) were comparatively studied, which exhibited an order of ε-MnO2 > α-MnO2 > γ-MnO2 > β-MnO2 ≈ δ-MnO2 > λ-MnO2. XRD and HRTEM confirmed their diversities on the exposed crystal planes. It was confirmed that ε-MnO2 with (1 0 2) plane has the largest number of oxygen vacancies and the best oxygen mobility. These findings elucidate the favorable performance of ε-MnO2 in the aforementioned tests. DFT calculations reveal the reaction mechanism, showed that ε-MnO2 has the lowest energy barrier for the decisive speed step O22- desorption (2.04 eV). This work illustrated the crucial role of the oxygen vacancies and the mobility of lattice oxygen, which sheds light on the strategies of rational design and control synthesis of effective catalysts for ozone elimination.
{"title":"Morphological impact of 1-dimensional → 3-dimensional manganese dioxides on ozone catalytic decomposition correlated with crystal facet and lattice oxygen mobility","authors":"Haotian Wu, Runduo Zhang, Bin Kang, Xiaonan Guo, Zhaoying Di, Kun Wang, Jingbo Jia, Ying Wei, Zhou-Jun Wang","doi":"10.1039/d4en00857j","DOIUrl":"https://doi.org/10.1039/d4en00857j","url":null,"abstract":"Ozone is a pollutant that has received widespread attention in recent years, and manganese dioxide (MnO<small><sub>2</sub></small>) has been widely used for ozone catalytic decomposition. However, few studies have described the structural-activity correlation of different types morphological of MnO<small><sub>2</sub></small>. In this study, series of MnO<small><sub>2</sub></small> crystals (α-, β-, γ-, δ-, ε-and λ-MnO<small><sub>2</sub></small>) were synthesized, and their catalytic activities on ozone decomposition (25 <small><sup>o</sup></small>C, dry air) were comparatively studied, which exhibited an order of ε-MnO<small><sub>2</sub></small> > α-MnO<small><sub>2</sub></small> > γ-MnO<small><sub>2</sub></small> > β-MnO<small><sub>2</sub></small> ≈ δ-MnO<small><sub>2</sub></small> > λ-MnO<small><sub>2</sub></small>. XRD and HRTEM confirmed their diversities on the exposed crystal planes. It was confirmed that ε-MnO<small><sub>2</sub></small> with (1 0 2) plane has the largest number of oxygen vacancies and the best oxygen mobility. These findings elucidate the favorable performance of ε-MnO<small><sub>2</sub></small> in the aforementioned tests. DFT calculations reveal the reaction mechanism, showed that ε-MnO<small><sub>2</sub></small> has the lowest energy barrier for the decisive speed step O<small><sub>2</sub></small><small><sup>2-</sup></small> desorption (2.04 eV). This work illustrated the crucial role of the oxygen vacancies and the mobility of lattice oxygen, which sheds light on the strategies of rational design and control synthesis of effective catalysts for ozone elimination.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"138 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580410","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}
The buildup of microplastics (MPs)/nanoplastics (NPs) in aquatic biota has sparked concern due to their negative consequences on human health and the environment, making it a global issue in recent years. As a result, to achieve sustainable development goals, management of MPs/NPs contamination is crucial. Although various studies have evaluated the harmful effects of MPs/NPs, there has been insufficient attention on managing MPs/NPs by nanotechnological interventions. This review first covers the key aspects of advanced strategies, including adsorption, membrane filtration, photocatalytic degradation, magnetic separation, and electrochemistry-driven ways for efficiently sequestering/degrading MPs/NPs from the aquatic environment. An in-depth discussion on the aforementioned strategies along with various nanomaterials/nanocomposites (e.g. micromotors, microswimmers, MOFs, GO, CNTs, etc.), for the mitigation of MPs/NPs is studied. The outlook section offers insights into the conversion of MPs/NPs into valuable products by using nano interventions. Additionally, a brief overview of the economic aspects/ cost analysis of MPs/NPs management, future directions, and prospects is comprehensively documented as futuristic approach.
{"title":"A Review on the Role of Nanotechnological Interventions in Sequestration, Mitigation and Value-added Product Conversion of Micro/Nano Plastics","authors":"Jasasmita Das, Emansi Yadav, Krishna Mohan Poluri","doi":"10.1039/d4en00267a","DOIUrl":"https://doi.org/10.1039/d4en00267a","url":null,"abstract":"The buildup of microplastics (MPs)/nanoplastics (NPs) in aquatic biota has sparked concern due to their negative consequences on human health and the environment, making it a global issue in recent years. As a result, to achieve sustainable development goals, management of MPs/NPs contamination is crucial. Although various studies have evaluated the harmful effects of MPs/NPs, there has been insufficient attention on managing MPs/NPs by nanotechnological interventions. This review first covers the key aspects of advanced strategies, including adsorption, membrane filtration, photocatalytic degradation, magnetic separation, and electrochemistry-driven ways for efficiently sequestering/degrading MPs/NPs from the aquatic environment. An in-depth discussion on the aforementioned strategies along with various nanomaterials/nanocomposites (e.g. micromotors, microswimmers, MOFs, GO, CNTs, etc.), for the mitigation of MPs/NPs is studied. The outlook section offers insights into the conversion of MPs/NPs into valuable products by using nano interventions. Additionally, a brief overview of the economic aspects/ cost analysis of MPs/NPs management, future directions, and prospects is comprehensively documented as futuristic approach.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"6 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142541325","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}
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