Environmental Science: Nano最新文献

{"title":"Synergistic effect of foliar exposure to TiO2 nanoparticles and planting density modulates the metabolite profile and transcription to alleviate cadmium induced phytotoxicity to wheat (Triticum aestivum L.)","authors":"Min Wang, Junxiao Luo, Hongbo Li, Chenghao Ge, Feng Jing, Jingxia Guo, Qingya Zhang, Xuezhen Gao, Cheng Cheng, Dongmei Zhou","doi":"10.1039/d4en00763h","DOIUrl":"https://doi.org/10.1039/d4en00763h","url":null,"abstract":"A reasonable planting density is vital for wheat resource efficiency and yield enhancement. However, systematic research on the impact of spraying TiO<small>₂</small>-NPs on wheat growth, metabolism, and stress tolerance cultivated in cadmium (Cd)-contaminated soil is limited, especially in integration with planting density, requiring a deeper understanding. Our study showed that spraying with 3.1 mg per plant TiO<small>₂</small>-NPs (in pots) and 21.6 mg m<small>⁻²</small> TiO<small>₂</small>-NPs combined with high planting densities (in the field) both significantly reduced the Cd content in wheat grains by 27.9 and 35.7%, respectively. Immobilization of subcellular water-soluble Cd and the conversion of Cd into inactive plant components in leaves were the primary reasons for this reduction. Metabolomics further revealed the up-regulation of metabolites related to antioxidant activity, plant stress resistance, growth promotion, and the tricarboxylic acid (TCA) cycle, which promotes plant growth, enhances wheat antioxidant enzyme activity, and alleviates oxidative stress. Transcriptomic analysis validated the association between these responses and improved plant stress resistance, with genes such as MYB, WRKY, P450, and Cd membrane transport-related genes like ABCG2 and ABCC3 contributing to the decrease in Cd levels in wheat. Importantly, the Cd-associated human health risk index was also reduced <em>via</em> foliar TiO<small>₂</small>-NPs application. Overall, foliar spraying of TiO<small>₂</small>-NPs combined with high plant density was beneficial in alleviating Cd levels in wheat grains, limiting the risk of Cd exposure to human health <em>via</em> the food chain.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"248 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665287","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":"Designing of MOFs-Based Green Nanomaterials for Enhanced Pathogen Resistance and Pesticide Degradation in Tomato Plants","authors":"Shoaib Khan, Aoxue Wang, Jiayin Liu, Iltaf Khan, Samreen Sadiq, Aftab Khan, Waleed Yaseen, Saeed Zaman, Abdul Mueed, Yuanyang Miao","doi":"10.1039/d4en00966e","DOIUrl":"https://doi.org/10.1039/d4en00966e","url":null,"abstract":"Over the past few years, nanotechnology and nanomaterials have played a crucial role in the agriculture sector. Notably, among different types of nanomaterials, the metal-organic frameworks (MOFs) have shown significant attention owing to their porosity, organic composition, biocompatibility, and tailored structural and compositional properties. Herein, in this research work, we have effectively prepared four types of MOFs including ZIF-8, ZIF-67, PFC 6, and PFC-7. Interestingly, among all prepared MOFs, the ZIF-67 exhibited exceptional performance. With an aim to further improve the efficacy of ZIF-67, we decorated it with SnO2. Among as-prepared samples, the optimal sample 5SnO2/ZIF-67 nanocomposite exhibited exceptional efficiency in terms of its high chemical and thermal stability, large surface area, selective antipathogenic activities, high catalytic activities, and disease resistance properties. Based on our various characterization techniques, such as XRD, DRS, PL, FS, BET, FT-IR, and RAMAN it has been confirmed that the incorporation of SnO2 into ZIF-67 leads to adjustments in band gaps, enhanced stability, modulated photo-electrons, provides large surface area, abundant active sites, and upgraded adsorption and selectivity for antipathogenic and pesticide degradation activities. As compared to pure ZIF-67, the most active sample 5SnO2@ZIF-67 showed ~4.5 and ~2.6 times significant improvement for glyphosate (GLY) and acephate (ACPH) degradation respectively. Remarkably, our prepared samples also offered potent performances against various pathogens in the Luria-Bertani medium. Based on the scavenger tests, •OH and O2- are respectively responsible for GLY and ACPH decomposition. Accordingly, the activities improvement mechanism and biochemical pathways are proposed. Finally, our novel research work will provide a gateway for the fabrication of MOFs-based green nanomaterials that will unlock a wide range of opportunities and applications in antipathogenic, and pesticide degradation activities and tomato plant growth.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"10 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665288","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":"Nanotechnology for oil spill response and cleanup in coastal regions","authors":"Huifang Bi, Catherine N. Mulligan, Kenneth Lee, Baiyu Zhang, Zhi Chen, Chunjiang An","doi":"10.1039/d4en00954a","DOIUrl":"https://doi.org/10.1039/d4en00954a","url":null,"abstract":"Oil spills frequently cause devastating impacts on coastal ecosystems and communities. Spill response methods for coastal regions, such as spill-treating agents, sorbents, and bioremediation, may face constraints due to environmental concerns, limited absorption capacity, and low effectiveness. Fortunately, the emergence of nanomaterials with unique properties has introduced promising solutions for coastal oil spill remediation. These nanomaterials have shown great potential in oil removal, recovery, and degradation through different mechanisms. Nanoparticles or nanocomposites can interact with spilled oil by breaking it into small droplets and forming stable Pickering emulsions. They can also remove oil from water by absorption, adsorption, or in combination with both due to their large surface area and numerous sorption sites. Furthermore, some nanomaterials possess catalytic activity to speed up the degradation of petroleum hydrocarbons into less harmful compounds. Moreover, the introduction of nanomaterials can be beneficial for bacteria proliferation, nutrient supply, and maintenance of favorable conditions, thereby accelerating the oil biodegradation process by microorganisms. In this perspective, we discussed the interactions between nanomaterials and oil, as well as their applications in various coastal oil spill response methods.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"21 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665282","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":"Pulsed laser deposition of delafossite oxide thin films on YSZ (001) substrates as solar water splitting photocathodes","authors":"Chenyu Zhou, Atiya Banerjee, Esteban Luis Fornero, Zhaoyi Xi, Xiao Tong, Eli Stavitski, Xiaohui Qu, Sara E. Mason, Dario J. Stacchiola, Mingzhao Liu","doi":"10.1039/d4en00706a","DOIUrl":"https://doi.org/10.1039/d4en00706a","url":null,"abstract":"Development of solar energy converters with earth-abundant and environmentally friendly materials is one of the key routes explored towards a sustainable future. In this work, crystalline delafossite-phase CuAlO<small>₂</small> and CuFeO<small>₂</small> thin film solar water splitting photocathodes were fabricated using pulsed laser deposition. It was found that the desired delafossite phase was formed only after high temperature annealing in an oxygen-free atmosphere. The homogeneous delafossite bulk structure of the films was determined by correlating simulation results from first-principles calculations with synchrotron-based X-ray absorption near edge structure (XANES) spectroscopy. Both CuAlO<small>₂</small> and CuFeO<small>₂</small> photocathodes are active for solar water splitting, with the latter more efficient due to its narrower band gap and improved light absorption.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"98 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637799","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":"Highly selective capture of palladium from acidic solution by sulfur-functionalized porous carbon microsphere: Performance and mechanism","authors":"Mingyue Wang, Ruiwen Liang, lanchao Kou, Xiukun Cao, Dezhi Chen","doi":"10.1039/d4en00738g","DOIUrl":"https://doi.org/10.1039/d4en00738g","url":null,"abstract":"Efficient recovery of palladium (Pd) from waste sources is of paramount importance due to its limited natural reserves and potential environmental hazards. Herein, a carbon sorbent, namely sulfur-functionalized porous carbon microsphere (SPCM), was used to selectively capture Pd(II) from acidic solution. SPCM exhibited high efficiency for the adsorption separation of Pd(II) from 0.5 M to 6 M HNO3 solution. The adsorption kinetic of Pd(II) matched well with the pseudo-second-order model. The adsorption reached equilibrium after 130 minutes and the adsorption capacity of Pd(II) was 79.3 mg/g in 1 M HNO3 solution. The Freundlich isotherm model exhibited a better description of the Pd(II) adsorption, suggesting that the Pd(II) adsorption is a multilayer adsorption. SPCM showed a high selectivity for the capture of Pd(II) in simulated acidic wastewater with 26 metal ions, and the selectivity increased with the increase of HNO3 concentration. The adsorption capacity per US dollar of Pd(II) by SPCM from HNO3 solution is much higher than those of the previously reported sorbents, exhibiting a high economic viability of SPCM for Pd(II) capture from acidic solution. The adsorbed Pd(II) could be desorbed using 1.0 M thiourea and 0.1 M HNO3, and the SPCM sorbent maintained a high adsorption capacity after five adsorption-desorption cycles. Characterizations and theoretical calculations revealed that the adsorption of Pd(II) on SPCM sorbent is dominated by the coordination of [Pd(NO3)2] with O/S containing groups and part of Pd(II) is reduced to Pd(0). The excellent adsorption performance of SPCM provides a feasible and low-cost strategy for the selective recovery of Pd(II) from acidic wastewater.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"7 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637800","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}