Chemosphere最新文献

筛选
英文 中文
Mechanisms of enhanced Cr (VI) removal by waste lignin derived N-doped hierarchical porous carbon (N-HPC). 废木质素衍生n掺杂分层多孔碳(N-HPC)增强Cr (VI)去除的机理
Chemosphere Pub Date : 2024-12-17 DOI: 10.1016/j.chemosphere.2024.143989
Huirong Zhang, Yi Shen, Lin Luo, Zihe Pan, Xiaokai Shi, Baofeng Wang, Dongke Zhang, Fangqin Chen
{"title":"Mechanisms of enhanced Cr (VI) removal by waste lignin derived N-doped hierarchical porous carbon (N-HPC).","authors":"Huirong Zhang, Yi Shen, Lin Luo, Zihe Pan, Xiaokai Shi, Baofeng Wang, Dongke Zhang, Fangqin Chen","doi":"10.1016/j.chemosphere.2024.143989","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143989","url":null,"abstract":"<p><p>N-doped hierarchical porous carbon (N-HPC) is made from waste lignin by a one-pot method, and its mechanisms of Cr (VI) removal was investigated. The specific surface area (S<sub>BET</sub>) of N-HPC-Fe3 was 1749.8 m<sup>2</sup>/g, the experimentally determined equilibrium adsorption capacity (q<sub>e</sub>) for Cr (VI) was 386.5 mg/g, and the calculated maximum adsorption capacity (q<sub>m</sub>) was 627.1 mg/g, which showed excellent adsorption performance. The adsorption process is consistent with the Langmuir model and the pseudo-second-order model. The removal process of Cr (VI) was proposed: the high specific surface area and positively charged surface of N-HPC enhanced the pore filling and electrostatic adsorption effects; and the high content of nitrogen-oxygen functional groups acted as electron donors and adsorption active sites, which reduced Cr (VI) to Cr (III) and complexed it to the N-HPC surface. The contribution of different mechanisms was quantified and 85.1% reduction was the main removal mechanism. The removal efficiency of N-HPC reached 76.5% after 7 cycles and was minimally affected by coexisting ions, showing excellent reusability, stability and selectivity. This study emphasizes the potential of using cost-effective and sustainable biomass waste carbon for Cr (VI) removal, providing a theoretical and practical basis for environmental remediation.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143989"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142866745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Association between volatile organic compounds and circadian syndrome among pre- and postmenopausal women: A population-based study. 绝经前后妇女体内挥发性有机化合物与昼夜节律综合征之间的关系:一项基于人口的研究。
Chemosphere Pub Date : 2024-12-17 DOI: 10.1016/j.chemosphere.2024.143975
Xiaoya Sun, Zhenao Zhang, Jingyi Ren, Huanting Pei, Jie Liu, Bowen Yin, Chongyue Zhang, Rui Wen, Simeng Qiao, Ziyi Wang, Yuxia Ma
{"title":"Association between volatile organic compounds and circadian syndrome among pre- and postmenopausal women: A population-based study.","authors":"Xiaoya Sun, Zhenao Zhang, Jingyi Ren, Huanting Pei, Jie Liu, Bowen Yin, Chongyue Zhang, Rui Wen, Simeng Qiao, Ziyi Wang, Yuxia Ma","doi":"10.1016/j.chemosphere.2024.143975","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143975","url":null,"abstract":"<p><p>Air pollution is closely associated with the development of multiple metabolic diseases. Circadian syndrome (CircS), as an extended concept of metabolic syndrome (MetS), has been proven to be a better predictor of metabolic diseases than MetS. However, the relationship between volatile organic compounds (VOCs) and CircS in pre- and postmenopausal remains unclear. This study used data from the National Health and Nutrition Examination Survey (NHANES) 2011-2020, including 520 premenopausal women and 531 postmenopausal women. Generalized linear model (GLM), restricted cubic splines (RCS) model, subgroup analyses, and weighted quantile sum (WQS) model was used to assess the relationship between VOCs and CircS. In addition, sensitivity analyses were performed to evaluate the robustness of the results. Our findings showed that seven VOC metabolites were positively associated with the risk of CircS in postmenopausal women. In premenopausal women, only two VOC metabolites were positively associated with the risk of CircS. The WQS analysis further confirmed that VOC mixtures selected by least absolute shrinkage and selection operator (LASSO) were significantly associated with an increased risk of CircS in postmenopausal women, with HPMMA identified as the primary contributor to the combined effect. This association was not evident in premenopausal women. Meanwhile, in postmenopausal women, individual urinary VOC metabolites and VOC mixtures were observed to be positively associated with elevated glucose and short sleep. Our results highlighted that VOCs exposure was strongly associated with the occurrence of CircS in postmenopausal women. Further research is needed to confirm this conclusion.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143975"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142866705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced oxidation of 2,4-dichlorophenol in ferrate(VI) and copper oxide system via the formation of trivalent copper ion and singlet oxygen. 高铁酸盐(VI)和氧化铜体系中2,4-二氯苯酚通过形成三价铜离子和单线态氧而增强氧化。
Chemosphere Pub Date : 2024-12-15 DOI: 10.1016/j.chemosphere.2024.143970
Guihai Zhang, Yidan Luo, Jiancheng Cheng, Xinlong Hua, Guizhou Xu, Mengqin Yu, Zhu Wang, Yalan Zhang, Wei Liu, Yingxin Du, Xianchuan Xie, Daishe Wu, Zugen Liu
{"title":"Enhanced oxidation of 2,4-dichlorophenol in ferrate(VI) and copper oxide system via the formation of trivalent copper ion and singlet oxygen.","authors":"Guihai Zhang, Yidan Luo, Jiancheng Cheng, Xinlong Hua, Guizhou Xu, Mengqin Yu, Zhu Wang, Yalan Zhang, Wei Liu, Yingxin Du, Xianchuan Xie, Daishe Wu, Zugen Liu","doi":"10.1016/j.chemosphere.2024.143970","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143970","url":null,"abstract":"<p><p>Improving the activity of ferrate is one of the main research focus in environmental field. Here, we demonstrate a novel copper oxide (CuO)-Ferrate(VI) system wherein CuO plays a key role in activating Fe(VI) to effectively eliminate phenolic contaminants. The dominant reactive species were determined to be Cu(III) and <sup>1</sup>O<sub>2</sub>, confirmed by in situ Raman spectroscopy, quenching experiments, and EPR tests. The results indicated that Fe(VI) preferentially reacts with CuO, forming Cu(III) and <sup>1</sup>O<sub>2</sub>. Subsequently, deprotonated 2,4-dichlorophenol (2,4-DCP) was adsorbed with Cu(III) via electrostatic adsorption and was directly oxidized by Cu(III). Co-existing ion experiments demonstrated the strong stability of the CuO/Fe(VI) system against environmental background substances, maintaining effective removal efficiency over multiple cycles. In summary, this study highlights the potential advantages of CuO-assisted Fe(VI) activation, offering a new route for the efficient utilization of Fe(VI) in eliminating phenolic pollutants.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143970"},"PeriodicalIF":0.0,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Combating chlorine-resistant marine Klebsiella pneumoniae biofilms with chlorine-tolerant bacteriophages. 利用耐氯噬菌体对抗耐氯海洋肺炎克雷伯氏菌生物膜。
Chemosphere Pub Date : 2024-11-01 Epub Date: 2024-11-29 DOI: 10.1016/j.chemosphere.2024.143782
Atif Khan, Hiren M Joshi
{"title":"Combating chlorine-resistant marine Klebsiella pneumoniae biofilms with chlorine-tolerant bacteriophages.","authors":"Atif Khan, Hiren M Joshi","doi":"10.1016/j.chemosphere.2024.143782","DOIUrl":"10.1016/j.chemosphere.2024.143782","url":null,"abstract":"<p><p>Biofilm formation presents a significant challenge in health care, food industries, water distribution systems, etc. In addition to their inherent resistance to various stresses and biocides, emerging resistance against widely used biocides like chlorine is a growing concern. The strong link between chlorine resistance and the development of antibiotic resistance among microbes further exacerbates this issue. Therefore, it is highly desirable to devise a method to mitigate the problems associated with biofilms formed by Chlorine Resistant Bacteria (CRB). In this study, a highly chlorine resistant, biofilm-forming Klebsiella pneumoniae was isolated from the cooling water system of a nuclear power plant employing continuous chlorination for biofilm control. Interestingly, K. pneumoniae was found to enhance biofilm formation under the influence of increasing concentrations of chlorine, highlighting the limitations of chlorination-based biofilm control measures. As a remedial measure, chlorine resistant bacteriophages specific to K. pneumoniae were successfully isolated from the same water sample. These bacteriophages effectively inhibited planktonic growth biofilm formation and removed preformed biofilms. Whole-genome sequencing of two of the promising bacteriophages confirmed their identity as novel bacteriophages specific to K. pneumoniae. The absence of any antibiotic-resistant gene, virulent factor(s), or gene associated with the lysogenic life cycle further supports their suitability for environmental applications. This study provides valuable insights into the prevalence of chlorine resistant, pathogenic bacteria in cooling water distribution systems. It also highlights the promising application of bacteriophages to mitigate chlorine resistant bacteria and their biofilms.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143782"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142690123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Two birds with one stone: Degradation of pharmaceuticals and elimination of bacteria upon treatment of urban wastewater with a Fenton-like process, based on zero-valent iron at pH 4. 一石二鸟:在 pH 值为 4 的条件下,利用基于零价铁的类似芬顿工艺处理城市污水,既能降解药物,又能消除细菌。
Chemosphere Pub Date : 2024-11-01 Epub Date: 2024-11-29 DOI: 10.1016/j.chemosphere.2024.143774
Silvia Bertolotti, Raghav Dogra, Raffaella Sabatino, Andrea Di Cesare, Stefano Fenoglio, Adeniyi Olufemi Adesina, Luca Carena, Silvia Berto, Matteo Marafante, Marco Minella, Davide Vione
{"title":"Two birds with one stone: Degradation of pharmaceuticals and elimination of bacteria upon treatment of urban wastewater with a Fenton-like process, based on zero-valent iron at pH 4.","authors":"Silvia Bertolotti, Raghav Dogra, Raffaella Sabatino, Andrea Di Cesare, Stefano Fenoglio, Adeniyi Olufemi Adesina, Luca Carena, Silvia Berto, Matteo Marafante, Marco Minella, Davide Vione","doi":"10.1016/j.chemosphere.2024.143774","DOIUrl":"10.1016/j.chemosphere.2024.143774","url":null,"abstract":"<p><p>ZVI-Fenton, which is the combination of zero-valent iron (metallic Fe) and H<sub>2</sub>O<sub>2</sub> is a relatively cheap advanced oxidation process for the elimination of contaminants from wastewater. Here we experimentally tested the ZVI-Fenton reaction at pH 4 towards two crucial goals in the treatment of secondary (partially treated) urban wastewater: (i) degradation of pharmaceuticals such as anti-inflammatory drugs (ibuprofen) and antibiotics (cefazolin, sulfamethoxazole), and (ii) elimination of a considerable fraction of bacteria through a combination of acidic pH and strongly oxidising conditions. In detail, ZVI-Fenton at pH 4 achieved degradation of both primary contaminants and potentially problematic transformation intermediates. The latter include toxic 4-isobutylacetophenone from ibuprofen and compounds potentially retaining antibiotic properties, namely cefazolin products with an intact β-lactam ring and sulfamethoxazole products retaining the p-amino sulfonic acid moiety. Furthermore, the ZVI-Fenton process significantly lowered the total abundance of bacteria, greatly aiding the final disinfection stage. Overall, both objectives were successfully achieved demonstrating that ZVI-Fenton at pH 4 is an efficient treatment against chemical and microbiological contaminants.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143774"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142683743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Iron separation from iron-rich manganese ore leachate: Comprehensive optimization of operating parameters and economic viability. 从富铁锰矿浸出液中分离铁:全面优化操作参数和经济可行性。
Chemosphere Pub Date : 2024-11-01 Epub Date: 2024-11-07 DOI: 10.1016/j.chemosphere.2024.143608
Zhisheng Zhao, Jiancheng Shu, Xiangfei Zeng, Mengjun Chen, Ling Hu, Zongyu Deng, Liang Ma, Shengjie Wang, Yong Yang, Hanke Wei
{"title":"Iron separation from iron-rich manganese ore leachate: Comprehensive optimization of operating parameters and economic viability.","authors":"Zhisheng Zhao, Jiancheng Shu, Xiangfei Zeng, Mengjun Chen, Ling Hu, Zongyu Deng, Liang Ma, Shengjie Wang, Yong Yang, Hanke Wei","doi":"10.1016/j.chemosphere.2024.143608","DOIUrl":"10.1016/j.chemosphere.2024.143608","url":null,"abstract":"<p><p>In the current electrolytic manganese industry, iron separation and reuse from iron-rich manganese ore leachate (IRMOL) has become one of the most pressing challenges. This study aimed to investigate the optimal conditions for iron separation from IRMOL and to assess the economic and practical advantages of iron separation or removal in industrial manufacturing. To identify more cost-effective and technologically advanced production circumstances, we examined five key elements that weaken Fe(OH)<sub>3</sub> colloidal production conditions in enterprises: reaction temperature, pH, crystal species, aging and reaction time. The screening results showed that when the conditions were optimized, the efficiency of reducing manganese loss decreased from 6.15% to 4.69%. Additionally, the generation of iron-rich electrolytic manganese residue (IREMR) was decreased by 44.32%, and the filtration velocity of IREMR increased from 0.0030 to 0.0220 mL/(s·cm<sup>2</sup>) compared to the production conditions before optimization at the enterprises. Through multiphase equilibria modeling with Visual MINTEQ, we have determined that raising the temperature and pH levels increases the expenses associated with chemicals and energy usage and results in an elevation of Fe(OH)<sub>2</sub><sup>+</sup> concentration. This can lead to the creation of Fe(OH)<sub>3</sub> colloidal, causing a high water content in IREMR, inefficient filtration, and significant loss of manganese. This strategy is highly significant for the production of electrolytic manganese and the reduction of electrolytic manganese residue.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143608"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142559737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Arsenite removal by using ZnAlFe mixed metal oxides derived from layered double hydroxides. 利用源自层状双氢氧化物的 ZnAlFe 混合金属氧化物去除亚砷酸盐。
Chemosphere Pub Date : 2024-11-01 Epub Date: 2024-11-23 DOI: 10.1016/j.chemosphere.2024.143694
Luis A May Ix, Sandra Cipagauta Díaz, Francisco Tzompantzi, Raúl Pérez Hernández, Jorge M Meichtry, Emilia B Halac, Marta I Litter
{"title":"Arsenite removal by using ZnAlFe mixed metal oxides derived from layered double hydroxides.","authors":"Luis A May Ix, Sandra Cipagauta Díaz, Francisco Tzompantzi, Raúl Pérez Hernández, Jorge M Meichtry, Emilia B Halac, Marta I Litter","doi":"10.1016/j.chemosphere.2024.143694","DOIUrl":"10.1016/j.chemosphere.2024.143694","url":null,"abstract":"<p><p>ZnAlFe mixed metal oxides (ZnAlFe-MMOs) were synthesized from layered double hydroxides (LDHs) prepared by the coprecipitation method at pH 9 using an initial weight composition of Zn<sup>2+</sup> = 75%, Al<sup>3+</sup> = 15% and Fe<sup>3+</sup> = 10%, with or without the addition of citric or oxalic acid. The solids were calcined at 400 °C to obtain the respective MMOs, which exhibited relatively high specific surface areas (165.3-63.8 m<sup>2</sup> g<sup>-1</sup>) and semiconductor properties active in the visible region (bandgap values (E<sub>g</sub>) of 2.42-1.77 eV). The synthesized materials were tested for the removal of trivalent arsenic by adsorption and by photocatalysis under visible light irradiation (λ ≥ 420 nm). The best removal of As(III) by adsorption (65.9%) and by photocatalysis (99.9%) was obtained with the ZnAlFe-MMOs prepared in the absence of organic acids. The XPS results indicate the coexistence of As<sup>3+</sup> and As<sup>5+</sup> over ZnAlFe-MMOs after the photocatalytic reaction and also confirm the formation of Fe<sup>2+</sup> sites on the hematite surface that enhances the removal of As(III). Raman measurements confirmed that, in the photocatalytic experiments, As is largely retained as As(V) on ZnAlFe-MMOs, bound to Fe. The results of fluorescence of 7-hydroxycoumarin suggest that the photocatalyst produces HO<sup>•</sup>, which can be the main species for As(III) oxidation under UV-Vis irradiation. Moreover, ZnAlFe-MMOs exhibited a good reusability after regeneration making ZnAlFe-MMOs a promising material for arsenic decontamination in polluted water.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143694"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142633278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
State of the science and regulatory acceptability for PFAS residual management options: PFAS disposal or destruction options. 全氟辛烷磺酸残留物管理方案的科学现状和法规可接受性:PFAS 处置或销毁方案。
Chemosphere Pub Date : 2024-11-01 Epub Date: 2024-11-26 DOI: 10.1016/j.chemosphere.2024.143726
Mahsa Modiri, Pavankumar Challa Sasi, Kyle A Thompson, Linda S Lee, Katie Marjanovic, Graeme Hystad, Kamruzzaman Khan, John Norton
{"title":"State of the science and regulatory acceptability for PFAS residual management options: PFAS disposal or destruction options.","authors":"Mahsa Modiri, Pavankumar Challa Sasi, Kyle A Thompson, Linda S Lee, Katie Marjanovic, Graeme Hystad, Kamruzzaman Khan, John Norton","doi":"10.1016/j.chemosphere.2024.143726","DOIUrl":"10.1016/j.chemosphere.2024.143726","url":null,"abstract":"<p><p>This systematic review covers the urgent challenges posed by per- and polyfluoroalkyl substances (PFAS) in managing residuals from municipal, industrial, and waste treatment sources. It covers regulatory considerations, treatment technologies, residual management strategies, and critical conclusions and recommendations. A rigorous methodology was employed, utilizing scientific search engines and a wide array of peer-reviewed journal articles, technical reports, and regulatory guidance, to ensure the inclusion of the most relevant and up-to-date information on PFAS management of impacted residuals. The increasing public and regulatory focus underscores the persistence and environmental impact of PFAS. Emerging technologies for removing and sequestrating PFAS from environmental media are evaluated, and innovative destruction methods for addressing the residual media and the concentrated waste streams generated from such treatment processes are reviewed. Additionally, the evolving regulatory landscape in the United States is summarized and insights into the complexities of PFAS in residual management are discussed. Overall, this systematic review serves as a vital resource to inform stakeholders, guide research, and facilitate responsible PFAS management, emphasizing the pressing need for effective residual management solutions amidst evolving regulations and persistent environmental threats.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143726"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142634382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Achieving high photocatalytic NOx removal activity using a Bi/BiOBr/TiO2 composite photocatalyst. 利用 Bi/BiOBr/TiO2 复合光催化剂实现高光催化氮氧化物去除活性
Chemosphere Pub Date : 2024-11-01 Epub Date: 2024-11-21 DOI: 10.1016/j.chemosphere.2024.143728
Paransa Alimard, Chen Gong, Ioanna Itskou, Andreas Kafizas
{"title":"Achieving high photocatalytic NO<sub>x</sub> removal activity using a Bi/BiOBr/TiO<sub>2</sub> composite photocatalyst.","authors":"Paransa Alimard, Chen Gong, Ioanna Itskou, Andreas Kafizas","doi":"10.1016/j.chemosphere.2024.143728","DOIUrl":"10.1016/j.chemosphere.2024.143728","url":null,"abstract":"<p><p>Fossil fuel combustion generates nitrogen oxides (NO + NO<sub>2</sub> = NO<sub>x</sub>), which pose threats to the environment and human health. Although commercial products containing titanium dioxide (TiO<sub>2</sub>) can remedy NO<sub>x</sub> pollution by photocatalysis, they only function in the ultraviolet (UV). On the other hand, bismuth oxybromide (BiOBr) is active in the visible. BiOBr is stable, affordable, and non-toxic, making it an appealing alternative. In addition, nanoparticulate Bi metal can further enhance visible light absorption through its surface plasmon properties and charge carrier lifetime by spatially separating charge. In this study, to enhance the visible-light activity of TiO<sub>2</sub>-based photocatalysts for NO<sub>x</sub> pollution, a composite of Bi-decorated BiOBr/TiO<sub>2</sub> was synthesised using a solvothermal method across varying the Ti/Bi atomic ratio (0.2, 2.2, 4.4, and 6.6), and synthesis duration (6h, 12h, and 18h). The photocatalytic performance of the synthesised composites for NO gas removal was investigated using an adapted ISO method (22197-1:2016). Analysis showed that the preferential growth of the (010) crystal facet in BiOBr and the presence of Bi metal both play an important role in the superior photocatalytic activity seen in our Bi-decorated BiOBr/TiO<sub>2</sub> composite. The composites were characterised using X-ray diffraction (XRD), attenuated total reflectance - Fourier transform infrared spectroscopy (ATR-FTIR), high-resolution scanning electron microscopy (HR-SEM), UV-Vis diffuse reflectance (DRS) spectroscopy, transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, Brunauer-Emmett-Teller (BET) analysis, thermogravimetric analysis (TGA), and diffuse reflectance transient absorption spectroscopy (DR-TAS). Our research shows that the Bi/BiOBr-TiO<sub>2</sub> composite synthesised through a 12h solvothermal method with a Ti/Bi atomic ratio of 4.4 exhibits the highest photocatalytic performance towards both NO and NO<sub>2</sub> oxidation; with 32.8% and 54.9% NO removal and 15.1% and 29.5% NO<sub>2</sub> under visible and UV lamps, respectively.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143728"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Invitro evaluation of interactions between cylindrospermopsin and water contaminants, arsenic and cadmium, in two human immune cell lines. 在两种人类免疫细胞系中对圆柱孢霉烯与水污染物砷和镉之间的相互作用进行体外评估。
Chemosphere Pub Date : 2024-11-01 Epub Date: 2024-11-20 DOI: 10.1016/j.chemosphere.2024.143727
Antonio Casas-Rodríguez, Tjaša Šentjurc, Leticia Diez-Quijada, Silvia Pichardo, Bojana Žegura, Angeles Jos, Ana María Cameán
{"title":"Invitro evaluation of interactions between cylindrospermopsin and water contaminants, arsenic and cadmium, in two human immune cell lines.","authors":"Antonio Casas-Rodríguez, Tjaša Šentjurc, Leticia Diez-Quijada, Silvia Pichardo, Bojana Žegura, Angeles Jos, Ana María Cameán","doi":"10.1016/j.chemosphere.2024.143727","DOIUrl":"10.1016/j.chemosphere.2024.143727","url":null,"abstract":"<p><p>Cylindrospermopsin (CYN), a cyanotoxin with worldwide distribution, is gaining increased attention due to its bioaccumulation potential and toxicological effects. Previous research suggests that CYN may interact with other environmental contaminants, potentially amplifying its toxicity. To address this concern, the present study investigated the combined effects of CYN with arsenic (As) and cadmium (Cd) on human immune cell lines, Jurkat and THP-1. Cytotoxicity tests showed that As and Cd significantly decreased the viability of both cell lines after 24 and 48 h of exposure. The EC<sub>50</sub> (24 h) values for Jurkat cells were 13.15 ± 1.97 (As) and 36.92 ± 3.77 μM (Cd), respectively, while for THP-1, the EC<sub>50</sub> (24 h) values were 46.48 ± 0.17 for As and 55.09 ± 4.98 μM for Cd. Furthermore, individual contaminants and their mixtures with CYN impaired monocyte differentiation into macrophages. The effect on mRNA expression of some cytokines (TNF-α, INF-γ, IL-2, IL-6 and IL-8) was also assessed. In the Jurkat cell line, As upregulated IL-8 expression while Cd increased the expression of all interleukins. Exposure to binary combinations (CYN + As, and CYN + Cd) increased IL-2 and INF-γ expression. In THP-1 cells, As elevated IL-8 and INF-γ expression, whereas Cd caused an increase in TNF-α and INF-γ expression. Exposure to CYN + As up-regulated IL-8 and INF-γ expression, while the CYN + Cd combination down-regulated TNF-α expression. These findings highlight the complex interactions between contaminants, emphasizing the need for evaluating combined effects in risk assessments.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143727"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142634388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信