Environmental Science: Nano最新文献

{"title":"MOF-5 fortified fiber optic plasmonic absorption-based Pb(ii) ion sensor for rapid water quality monitoring†","authors":"Swetha Menon, Sourav Dutta, Narayanan Madaboosi and V. V. R. Sai","doi":"10.1039/D4EN00197D","DOIUrl":"10.1039/D4EN00197D","url":null,"abstract":"<p >Precise detection of heavy metal ions in water is of paramount importance owing to its detrimental effects on human health, especially with spectroscopically silent ions such as lead ions (Pb(<small>II</small>)). This study demonstrates the design and development of a novel portable and field-deployable fiber optic plasmonic absorption-based chemical sensor (PACS) for Pb(<small>II</small>) ion detection using a metal–organic framework (MOF-5) as a highly selective chemoreceptor. MOF-5 was grown <em>in situ</em> over the tannic acid-capped gold nanoparticles (AuNPs, 20 nm) of plasmonic U-bent fiber optic sensor (U-FOS) probes. The Pb(<small>II</small>) ion binding to MOF-5 was detected and quantified as an increase in the plasmonic absorption of the light by AuNPs due to significant refractive index changes at the AuNP surface. Besides excellent selectivity (Pb(<small>II</small>) <em>vs.</em> 11 potential interfering metal ions at 1 : 50 ppm), these sensors manifest a detection limit down to 0.5 ppb (20 times below the maximum contaminant level of 10 ppb) and a wide dynamic range (0.5 ppb to 50 ppm). The sensor was challenged with filtered sewage samples (neat and spiked with 10 ppb) and yielded recovery rates within 91% to 105% with respect to the standard ICP-MS analysis. With the notable merits of a facile and scalable probe fabrication process, long shelf-life (at least 12 weeks moisture-free storage), and simpler instrumentation (only with an LED–photodetector pair), the PACS/MOF-5 platform is highly promising for water quality measurements on-site.</p>","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141584353","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":"Uptake and physiological impacts of nanoplastics in trees with divergent water use strategies†","authors":"Maria Elvira Murazzi, Alice Pradel, Roman B. Schefer, Arthur Gessler and Denise M. Mitrano","doi":"10.1039/D4EN00286E","DOIUrl":"10.1039/D4EN00286E","url":null,"abstract":"<p >Anthropogenic contaminants can place significant stress on vegetation, especially when they are taken up into plants. Plastic pollution, including nanoplastics (NPs), could be detrimental to tree functioning, by causing, for example, oxidative stress or reducing photosynthesis. While a number of studies have explored the capacity of plants to take up NPs, few have simultaneously assessed the functional damage due to particulate matter uptake. To quantify NPs uptake by tree roots and to determine whether this resulted in subsequent physiological damage, we exposed the roots of two tree species with different water use strategies in hydroponic cultures to two concentrations (10 mg L<small>⁻¹</small> and 30 mg L<small>⁻¹</small>) of model metal-doped polystyrene NPs. This approach allowed us to accurately quantify low concentrations of NPs in tissues using standard approaches for metal analysis. The two contrasting tree species included Norway spruce (<em>Picea abies</em> [L.] Karst), a water conservative tree, and wild service tree (<em>Sorbus torminalis</em> [L.] Crantz), an early successional tree with a rather water spending strategy. At both exposure concentrations and at each of the experimental time points (two and four weeks), NPs were highly associated and/or concentrated inside the tree roots. In both species, maximum concentrations were observed after 2 weeks in the roots of the high concentration (HC) treatment (spruce: 2512 ± 304 μg NPs per g DW (dry weight), wild service tree: 1190 ± 823 μg NPs per g DW). In the aboveground organs (stems and leaves or needles), concentrations were one to two orders of magnitude lower than in the roots. Despite relatively similar NPs concentrations in the tree aboveground organs across treatments, there were different temporal impacts on tree physiology of the given species. Photosynthetic efficiency was reduced faster (after 2 weeks of NPs exposure) and more intensively (by 28% in the HC treatment) in wild service trees compared to Norway spruce (<em>ca.</em> 10% reduction only after 4 weeks). Our study shows that both, evergreen coniferous as well as deciduous broadleaf tree species are negatively affected in their photosynthesis by NPs uptake and transport to aboveground organs. Given the likelihood of trees facing multiple, concurrent stressors from anthropogenic pollution and climate change, including the impact of NPs, it is crucial to consider the cumulative effects on vegetation in future.</p>","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/en/d4en00286e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141584465","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}

{"title":"Self-cycled photocatalytic Fenton system and rapid degradation of organic pollutants over magnetic 3D MnS nanosheet/iron–nickel foam†","authors":"Xiaoqian Ma, Yu Liu, Yi Zhao, Xiaohong Chen, Junyang Leng, Anlong Zhang, Daomei Chen, Kai Xiong and Jiaqiang Wang","doi":"10.1039/D4EN00452C","DOIUrl":"10.1039/D4EN00452C","url":null,"abstract":"<p >Photocatalytic self-Fenton systems by coupling photocatalysis and Fenton technology overcome the limitations of conventional Fenton reactions by <em>in situ</em> generation and activation of H<small>₂</small>O<small>₂</small>. However, a considerable amount of iron sludge is still produced. In this study, we developed a novel self-cycled photocatalytic Fenton process for the degradation of organic pollutants <em>via</em> an iron–nickel foam-supported MnS nanosheet (MnS/INF). Without the external addition of both H<small>₂</small>O<small>₂</small> and ferrous ions, the MnS/INF 3D Z-scheme heterojunction exhibited an extremely high H<small>₂</small>O<small>₂</small> production rate of 25.4 mM h<small>⁻¹</small> g<small>⁻¹</small> under visible light irradiation, which is 2–119 times higher than those of the reported photocatalytic self-Fenton systems in the literature. The photogenerated electrons of MnS/INF can participate in the Fe<small>²⁺</small>/Fe<small>³⁺</small> cycle process to promote H<small>₂</small>O<small>₂</small> activation, significantly enhancing the catalytic performance owing to the formation of a 3D Z-scheme heterojunction. DFT calculations indicate that MnS/INF can lower the energy barrier of *OOH formation and result in an enhanced photocatalytic activity of H<small>₂</small>O<small>₂</small> production. Magnetic MnS/INF was easily recycled, remained very stable, and mitigated the extra undesirable Fe-containing sludge and only little iron sludge (0.43 mmol L<small>⁻¹</small>) was produced after nine cycles of reuse. Furthermore, large (100 cm<small>²</small>) MnS/INF was used for an unassisted solar-driven <em>in situ</em> photocatalytic H<small>₂</small>O<small>₂</small> production and rapid degradation of RhB with requirements of only water, oxygen and sunlight. In addition, MnS/INF also exhibited good performance in real wastewater containing fluoronitrobenzene from a factory (initial COD 2310 mg L<small>⁻¹</small>) and wastewater from a sewage treatment station (initial COD 106 mg L<small>⁻¹</small>). This work may provide leverage to minimize iron sludge from the Fenton reaction's source.</p>","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141584519","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":"Synthesis of N-doped porous carbon derived from biomass waste for activating peroxymonosulfate in water decontamination: mechanism insight and biotoxicity assessment†","authors":"Shun Ding, Fangyu Fu, Huibin Niu, Jiaying Yan, Yanfen Fang and Xiang Liu","doi":"10.1039/D4EN00481G","DOIUrl":"10.1039/D4EN00481G","url":null,"abstract":"<p >N-doping is a widely used strategy for the synthesis of highly efficient carbon nanocatalysts; however, an in-depth understanding of the effect of nitrogen source on the intrinsic structure and catalytic performance is highly desired. Therefore, to kill two birds with one stone, a series of N-doped carbon nanomaterials were synthesized by the pyrolysis of biomass waste (dealkaline lignin) and various nitrogen sources (including melamine, dicyandiamide, and urea). Even though N-doped nanocatalysts showed better catalytic activity than HCNs (pyrolysis of only dealkaline lignin) for sulfamethoxazole (SMX) degradation <em>via</em> peroxymonosulfate (PMS) activation, NCN-1 and NCN-2 presented contractive and small spherical structures when melamine and dicyandiamide with high nitrogen content were added, showing relatively low catalytic efficiency. NPCN derived from dealkaline lignin and urea led to the formation of a porous cluster structure with abundant active species of graphitic C/N and C–OH, which showed the best catalytic performance for SMX degradation. Significantly, NPCN exhibited excellent universality, adaptability, and reusability. Moreover, the possible mechanism was proposed based on quenching study, electron paramagnetic resonance (EPR) analysis, electronic quenching experiment, density functional theory (DFT) calculation, and high-resolution mass spectrometry (HR-MS), confirming that e, <small>¹</small>O<small>₂</small>, ·OH, SO<small>₄</small>˙<small>⁻</small>, and O<small>₂</small>˙<small>⁻</small> were the active species, of which <small>¹</small>O<small>₂</small> was the dominant one in the NPCN/PMS system. In addition, the biotoxicity of SMX was evaluated by ecological structure–activity-relationship model (ECOSAR) analysis and germination tests of wheat seeds. This work provides how the nitrogen source would affect the microstructure-dependent catalytic activity of metal-free carbon nanocatalysts for water decontamination.</p>","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141566080","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":"Catalytic activity of Cu-cysteine coated on Ti3C2MXene toward peroxymonosulfate activation for carbamazepine degradation","authors":"Pascaline Sanga, Haitham Saad Al-mashriqi, Jing Xiao, Jia Chen, Hongdeng Qiu","doi":"10.1039/d4en00342j","DOIUrl":"https://doi.org/10.1039/d4en00342j","url":null,"abstract":"The growing prevalence of pharmaceutical pollutants in water bodies poses a significant threat to the enviromnent, underscoring the urgent need for more effective and sustainable methods for removing these pollutants. This study introduces a novel technique for degrading carbamazepine (CBZ), based on a peroxymonosulfate (PMS) oxidation system catalysed by a Copper-cysteine/Ti3C2MXene composite (Cu-cy/Ti3C2MXene), denoted as CCM. CCM was initially prepared by growing Cu-cy nanoparticles on MXene sheet to make Cu-cy/Ti3C2MXene. CCM was then utilized to activate PMS, facilitating the generation of reactive oxygen species necessary for decomposing CBZ. The CCM+PMS system demonstrated a remarkable 98.6% degradation rate of CBZ within 20 min, outperforming the pristine Cu-cy nanoparticles and Ti3C2MXene when applied in same conditions. Furthermore, to examine the vital contribution of reactive oxygen species in the degradation process, experiments focused on quenching reactions and electron paramagnetic resonance (EPR) analysis demonstrated that both radical species, including sulfate radicals (SO4•-) and hydroxyl radicals (•OH), and non-radical species such as singlet oxygen (1O2), were involved in the degradation of CBZ with non-radical species (1O2) exerting a predominant role. Notably, the synthesized material showed excellent reusability and stability in multiple cycles of CBZ degradation. These findings highlight the effectiveness of the CCM+PMS system in addressing water pollution issues caused by CBZ.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":8.131,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141566021","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":"In chemico methodology for engineered nanomaterial categorization according to number, nature and oxidative potential of reactive surface sites†","authors":"V. Alcolea-Rodriguez, R. Portela, V. Calvino-Casilda and M. A. Bañares","doi":"10.1039/D3EN00810J","DOIUrl":"10.1039/D3EN00810J","url":null,"abstract":"<p >Methanol probe chemisorption quantifies the number of reactive sites at the surface of engineered nanomaterials, enabling normalization per reactive site in reactivity and toxicity tests, rather than per mass or physical surface area. Subsequent temperature-programmed surface reaction (TPSR) of chemisorbed methanol identifies the reactive nature of surface sites (acidic, basic, redox or combination thereof) and their reactivity. Complementary to the methanol assay, a dithiothreitol (DTT) probe oxidation reaction is used to evaluate the oxidation capacity. These acellular approaches to quantify the number, nature, and reactivity of surface sites constitute a new approach methodology (NAM) for site-specific classification of nanomaterials. As a proof of concept, CuO, CeO<small>₂</small>, ZnO, Fe<small>₃</small>O<small>₄</small>, CuFe<small>₂</small>O<small>₄</small>, Co<small>₃</small>O<small>₄</small> and two TiO<small>₂</small> nanomaterials were probed. A harmonized reactive descriptor for ENMs was obtained: the DTT oxidation rate per reactive surface site, or oxidative turnover frequency (OxTOF). CuO and CuFe<small>₂</small>O<small>₄</small> ENMs exhibit the largest reactive site surface density and possess the highest oxidizing ability in the series, as estimated by the DTT probe reaction, followed by CeO<small>₂</small> NM-211 and then titania nanomaterials (DT-51 and NM-101) and Fe<small>₃</small>O<small>₄</small>. DTT depletion for ZnO NM-110 was associated with dissolved zinc ions rather than the ZnO particles; however, the basic characteristics of the ZnO NM-110 particles were evidenced by methanol TPSR. These acellular assays allow ranking the eight nanomaterials into three categories with statistically different oxidative potentials: CuO, CuFe<small>₂</small>O<small>₄</small> and Co<small>₃</small>O<small>₄</small> are the most reactive; ceria exhibits a moderate reactivity; and iron oxide and the titanias possess a low oxidative potential.</p>","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/en/d3en00810j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141561377","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}

{"title":"Synergistic bimetallic MOF-integrated MXene nanosheets for enhanced catalytic degradation of carbamazepine and hydrogen production: a dual-function approach for water remediation and energy applications†","authors":"Van-Anh Thai, Thanh-Binh Nguyen, Chiu-Wen Chen, Xuan-Thanh Bui, Ruey-an Doong and Cheng-Di Dong","doi":"10.1039/D4EN00324A","DOIUrl":"10.1039/D4EN00324A","url":null,"abstract":"<p >This study introduces a novel metallic MOF composite, MIL-100@ZIF-67, anchored on MXene nanosheets, designated as MIL-100@ZIF-67@MXene, for the enhanced degradation of carbamazepine (CBZ) and activation of peroxymonosulfate (PMS). The efficacy of the composite in CBZ degradation and the underlying reaction parameters and mechanisms were thoroughly investigated. Remarkably, the MIL-100@ZIF-67@MXene/PMS system achieved a 95% reduction of CBZ within 30 min under neutral pH conditions. Scavenger experiments and electron paramagnetic resonance (EPR) analysis confirmed that a combination of radicals (SO<small>₄</small>˙<small>⁻</small>, ˙OH and O<small>₂</small>˙<small>⁻</small>) and non-radicals (<small>¹</small>O<small>₂</small> and high-valent metal–oxo species) contributed to the degradation process, with singlet oxygen (<small>¹</small>O<small>₂</small>) identified as the predominant active species. Additionally, the composite exhibited superior performance in the hydrogen evolution reaction (HER), generating 130 μmol L<small>⁻¹</small> mg<small>⁻¹</small> min<small>⁻¹</small> dissolved hydrogen under alkaline conditions (pH 10) and a potential of −1.2 V. This research demonstrates the potential of bimetallic MOFs combined with carbon materials for effective antibiotic removal and PMS activation. Furthermore, it highlights their promising capability in the HER, offering a multifaceted approach to addressing environmental pollution and promoting energy sustainability.</p>","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141561392","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":"The performance and mechanism of persulfate activated by CuFe-LDHs for ofloxacin degradation in water†","authors":"Xue Zhang, Kang Zhang, Ting Li, Yujiao Wang and Yin Xu","doi":"10.1039/D4EN00370E","DOIUrl":"10.1039/D4EN00370E","url":null,"abstract":"<p >Antibiotic-containing refractory organic wastewater is difficult to degrade <em>via</em> traditional physicochemical treatment technology because of its high stability. Therefore, an advanced oxidation process based on sulfate radicals was developed and received extensive attention because of its wider pH operating range and stronger oxidizing property, considering that the PS was easily activated by transition metals without excessive energy input. In this study, a layered double hydroxide (LDH) catalyst consisting of Cu(<small>II</small>) and Fe(<small>III</small>) (CuFe-LDHs) was synthesized to activate PS to degrade ofloxacin (OFL) in water effectively. The results showed that when the dosages of CuFe-LDHs and PS were set as 0.5 g L<small>⁻¹</small> and 0.2 mM, respectively, the degradation efficiency of OFL was up to ∼80% within a wide pH operating range (3–11) and with low activation energy (<em>E</em><small>_a</small> = 54.95 kJ mol<small>⁻¹</small>) under the condition that the initial OFL concentration was 10 mg L<small>⁻¹</small>. Interference experiments on OFL degradation demonstrated that Cl<small>⁻</small>, NO<small>₃</small><small>⁻</small>, humic acid and HCO<small>₃</small><small>⁻</small> have almost no influence on the CuFe-LDHs/PS system, while the OFL degradation performance was significantly inhibited with increasing concentration of SO<small>₄</small><small>²⁻</small> and H<small>₂</small>PO<small>₄</small><small>⁻</small> (the degradation efficiency decreased by 44.4% and 60.1%, respectively). The results of quenching experiments and electron paramagnetic resonance analysis showed that SO<small>₄</small>·<small>⁻</small> was the dominant free radical for OFL degradation, and SO<small>₄</small>·<small>⁻</small> was generated <em>via</em> Cu-Fe electron transfer with surface-OH acting as active sites. That was the reason why the catalytic reaction process was easily affected by SO<small>₄</small><small>²⁻</small> and H<small>₂</small>PO<small>₄</small><small>⁻</small>. In addition, the CuFe-LDHs/PS system exhibited excellent cycle performance: the OFL degradation efficiency remained at 66.8% after five cycles. In summary, this study provides theoretical and technical guidance for the application of CuFe-LDHs in antibiotic wastewater degradation by activating PS.</p>","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141561414","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":"Two-stage hierarchical clustering for analysis and classification of mineral sunscreen and naturally occurring nanoparticles in river water using single-particle ICP-TOFMS","authors":"Hark Karkee, Alexander Gundlach-Graham","doi":"10.1039/d4en00288a","DOIUrl":"https://doi.org/10.1039/d4en00288a","url":null,"abstract":"Titanium dioxide (TiO<small>₂</small>) and zinc oxide (ZnO) engineered nanoparticles (NPs) are used in mineral-based sunscreens due to their excellent ultraviolet light protection abilities. Over time, surface water can become contaminated with these particles because of human recreational activities such as bathing, swimming, and other water sports. Thus, there is a need to measure these engineered particles present in surface waters to gain better understanding of anthropogenic input. In this study, we measure natural stream water spiked with mineral sunscreen along with naturally occurring NPs and microparticles (µPs) at the single-particle level using single-particle inductively coupled plasma time-of-flight mass spectrometry (spICP-TOFMS). We use two-stage hierarchical clustering analysis (HCA) to identify distinct multi-elemental compositions that are characteristic of sunscreen-derived particles. Specifically, sunscreen NPs can be isolated from naturally occurring NPs and µPs based on elevated Ti and Zn mass fractions in individual particles compared to natural particles that are rich in Fe, Al, Mn, Ti, Mg, Zn, Ce, La, and/or Pb. Based on clusters assigned by HCA, we demonstrate classification of sunscreen-derived Ti and Zn NPs across more than two orders of magnitude and at number concentrations up to 50-times lower than that of naturally occurring Ti- and Zn-containing particles. This study demonstrates the accurate class assignment of sunscreen released and naturally occurring particles in river water.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":8.131,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141561380","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":"Overlooked impact of surface hydroxylation on the solubility of less-soluble compounds: a case study of CeO2†","authors":"Tatiana V. Plakhova, Anna Yu. Romanchuk, Anastasia D. Konyukhova, Irina F. Seregina, Alexander E. Baranchikov, Roman D. Svetogorov, Maxwell W. Terban, Vladimir K. Ivanov and Stepan N. Kalmykov","doi":"10.1039/D4EN00014E","DOIUrl":"10.1039/D4EN00014E","url":null,"abstract":"<p >Unexpectedly, the solubility of CeO<small>₂</small> nanoparticles (NPs) at 25 °C does not depend on particle size, but is significantly affected by the sample's thermal pre-treatment. The classical interpretation of NPs' solubility proposed by the Gibbs–Thompson or Kelvin equations fails to describe the experimental data on CeO<small>₂</small> solubility obtained in this study. Thermal treatment did not change the samples' morphological characteristics, while slightly affecting NP hydroxylation and local crystallinity. The differences in the solubility of dried and non-treated CeO<small>₂</small> particles were most noticeable at pH &lt; 4, and dissolved cerium concentration was much lower in the case of the dried sample. After prolonged storage (up to 4.5 years) of CeO<small>₂</small> NPs in aqueous media, the solubility of dried samples gradually increased, while for non-treated samples it remained unchanged. Based on the example of CeO<small>₂</small>, the dissolution laws of other less soluble nanomaterials should be reconsidered.</p>","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141545786","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}