Journal of Environmental Sciences-china最新文献

{"title":"Rates of anaerobic oxidation of methane and metabolite production from a model landfill gas using an enriched fermentative microbial community","authors":"Cecilia Lizeth Alvarez-Guzmán ,&nbsp;Karla María Muñoz-Páez ,&nbsp;Gloria Moreno-Rodríguez ,&nbsp;Iván Moreno-Andrade ,&nbsp;Idania Valdez-Vazquez","doi":"10.1016/j.jes.2024.11.023","DOIUrl":"10.1016/j.jes.2024.11.023","url":null,"abstract":"<div><div>Anaerobic oxidation of methane (AOM) can contribute to reducing methane emissions in landfills; however, the AOM rates vary depending on the inoculum source. This study addressed the capacity of AOM of a fermentative microbial community derived from a reactor treating municipal solid wastes. First, the inoculum's autotrophic capacity was verified using a gas mixture of 75 % CO₂ and 25 % H₂. Results demonstrated that the fermentative microbial community reached a maximum CO₂ consumption rate of 22.5 ± 1.2 g CO₂/(m³·h), obtaining acetate as the main product. Then, the inoculum was grown on a gas mixture of 50 % CH₄, 35 % CO₂, and 15 % N₂, using iron (Fe³⁺) as the electron acceptor. The AOM rates increased over time and peaked at 3.1 ± 0.9 g CH₄/(m³·h) by 456 h with the simultaneous consumption of CO₂. Acetate was the main product, with a maximum concentration of 180 ± 9 mg/L. By 408 h, a bacterial cluster of indicator species correlated with the AOM rates, including to Rhodobactereceae (<em>r</em> = 0.80), <em>Oceanicola</em> (<em>r</em> = 0.80), <em>Propionicicella</em> (<em>r</em> = 0.77), Christensenellaceae (<em>r</em> = 0.58), Oscillospiraceae (<em>r</em> = 0.53), <em>Mobilitalea</em> (<em>r</em> = 0.66), Hungateiclostridiaceae (<em>r</em> = 0.46), and <em>Izemoplasmatales</em> (<em>r</em> = 0.77). <em>Methanosarcina, Methanobacterium</em>, and <em>Methanoculleus</em> correlated with the AOM and CO₂ consumption rates. A co-occurrence network analysis showed that <em>Methanosarcina</em> positively interacted with syntrophic bacteria like Christensenellaceae and <em>Acinetobacter</em> and diverse heterotrophic bacteria. This study demonstrated the feasibility of obtaining a CH₄-oxidizing microbial community in 16 days, exhibiting AOM rates higher than those reported for soils.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 291-302"},"PeriodicalIF":5.9,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941518","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":"Gut dysbiosis exacerbates inflammatory liver injury induced by environmentally relevant concentrations of nanoplastics via the gut-liver axis","authors":"Sugan Xia ,&nbsp;Chaoyue Yan ,&nbsp;Guodong Cai ,&nbsp;Qingyu Xu ,&nbsp;Hui Zou ,&nbsp;Jianhong Gu ,&nbsp;Yan Yuan ,&nbsp;Zongping Liu ,&nbsp;Jianchun Bian","doi":"10.1016/j.jes.2024.11.022","DOIUrl":"10.1016/j.jes.2024.11.022","url":null,"abstract":"<div><div>As an emerging and potentially threatening pollutant, nanoplastics (NPs) have received considerable global attention. Due to their physical properties and diminutive size, NPs ingestion can more easily cross biological barriers and enter the human and animal body. Despite reports of hepatotoxicity associated with NPs, their impact and potential underlying mechanisms remain elusive. In this study, we investigated the impact of NPs at concentrations found in the environment on the gut flora, intestinal barrier function, liver pyroptosis, and inflammation in mice following 12 weeks of exposure. To further validate the involvement of gut flora in inflammatory liver damage caused by NPs, we utilized antibiotics to remove the intestinal flora and performed fecal microbiota transplantation. We confirmed that NPs exposure altered the gut microbiota composition, with a notable rise in the proportions of <em>Alloprevotella</em> and <em>Ileibacterium</em> while causing a decrease in the relative proportions of <em>Dubosiella</em>. This disruption also affected the gut barrier, increasing lipopolysaccharides in circulation and promoting liver pyroptosis. Importantly, mice receiving fecal transplants from NPs-treated mice showed intestinal barrier damage, liver pyroptosis, and inflammation. However, NPs effects on the intestinal barrier and liver pyroptosis were attenuated by antibiotics depletion of the commensal microbiota. In summary, our current research revealed that extended exposure to environmentally relevant concentrations of NPs resulted in inflammatory damage to the liver. Additionally, we have identified for the first time that imbalances in intestinal flora are crucial in liver pyroptosis induced by NPs.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 250-266"},"PeriodicalIF":5.9,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158382","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":"Hypocalcemia as biological mechanism responsible for prenatal exposure to polycyclic aromatic hydrocarbons (PAHs) and anemia: Insights from Zunyi birth cohort","authors":"Lei Luo ,&nbsp;Wenbi Yang ,&nbsp;Haonan Zhang ,&nbsp;Lei Bai ,&nbsp;Zhongbao Chen ,&nbsp;Lin Tao ,&nbsp;Haiyan Wang ,&nbsp;Shimin Xiong ,&nbsp;Ruoxuan Li ,&nbsp;Yijun Liu ,&nbsp;Xingyan Liu ,&nbsp;Yan Xie ,&nbsp;Rong Zeng ,&nbsp;Xubo Shen ,&nbsp;Xuejun Shang ,&nbsp;Yuanzhong Zhou ,&nbsp;Kunming Tian","doi":"10.1016/j.jes.2024.11.016","DOIUrl":"10.1016/j.jes.2024.11.016","url":null,"abstract":"<div><div>Anemia is still prevalent among low and middle-income countries, posing serious family and social burdens. However, scarce studies provided evidence for real-world exposure to polycyclic aromatic hydrocarbons (PAHs) and anemia among pregnant women, as well as involved biological mechanisms. So, we conducted this study including 1717 late pregnant women from Zunyi Birth Cohort and collected urine samples for PAHs metabolites detection. Logistic regression and restricted cubic spline regression were used to examine exposure-disease risks and dose-response relationships. We conducted Bayesian kernel machine regression, weighted quantile sum regression, and quantile g-computation regression to fit the joint impacts of multiple PAHs in the real-world scenario on hypocalcemia and anemia. Results showed single exposure to 2-OHNap, 2-OHFlu, 9-OHFlu, 1-OHPhe, 2-OHPhe, 3-OHPhe, and 1-OHPyr (all <em>P</em>-trend &lt; 0.05) increased the risks of hypocalcemia and anemia. Moreover, PAHs mixture was significantly related to higher risks of hypocalcemia and anemia, with 3-OHPhe and 1-OHPyr identified as their major drivers, respectively. Importantly, hypocalcemia served as a significant biological mechanism responsible for PAHs and anemia. Our findings suggest that individual and joint exposure to PAHs during late pregnancy elevate the anemia risk, and calcium supplementation might be a low-cost intervention target for reducing the PAHs-related impairment on anemia for pregnant women.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":""},"PeriodicalIF":5.9,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918224","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":"Vertical distribution of intracellular protoporphyrin IX in coastal sediment cores: Implications for sedimentology and microbial community composition","authors":"Wanli Yan ,&nbsp;Lide Gu ,&nbsp;Xinli Yue ,&nbsp;Haowen Zhong ,&nbsp;Deli Wang","doi":"10.1016/j.jes.2024.11.014","DOIUrl":"10.1016/j.jes.2024.11.014","url":null,"abstract":"<div><div>Protoporphyrin IX (PPIX), a basic porphyrin system found in nature, all “porphyrin-type” tetrapyrroles with a biological function are biosynthetically derived thereof. PPIX is a metalloprosthetic group of numerous proteins involved in diverse metabolic and respiratory processes across all domains of life, and is thus considered essential for respiring organisms. Determining the biotic and abiotic factors that influence marine microbial growth and community structure is critical for understanding global biogeochemical cycles. Here, we present vertical profiles of intracellular PPIX and four derivative products (Chlorophyll-<em>a</em>/<em>b</em> and Pheophytin-<em>a</em>/<em>b</em>) from two coastal sediment cores, alongside ancillary geochemical and 16S rRNA microbial community data. Our findings indicated that PPIX is present in the natural sediment environment and displays a decreasing trend with depth, revealing a significant positive correlation with both organic matter and microbial abundance. Co-occurrence networks revealed that the environmental distribution of PPIX was positively correlated with the microbial porphyrin producer (high genetic completeness), but negatively correlated with auxotrophs (absence or low genetic completeness). It emphasized the critical role of PPIX as a biological molecule involved in key physiological processes. These results suggest that PPIX is a prominent component of the shared extracellular metabolite pool, especially in anoxic marine sediments where it exists at physiologically relevant concentrations for microbial metabolism. This study highlighted the significance of PPIX in microbial ecology and its potential impact on biogeochemical cycles in marine sedimentary environments.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"156 ","pages":"Pages 712-724"},"PeriodicalIF":5.9,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835092","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":"Investigation on the thermal activation of peroxydisulfate by using the hydrodynamic cavitation: A case study on tetracycline degradation","authors":"Kexin Xiang ,&nbsp;Xi Yuan ,&nbsp;Zhewen Shao ,&nbsp;Shuchang Liu ,&nbsp;Enhong Lei ,&nbsp;Yan Liu ,&nbsp;Feng Hong ,&nbsp;Jinping Jia ,&nbsp;Yingping Huang","doi":"10.1016/j.jes.2024.11.018","DOIUrl":"10.1016/j.jes.2024.11.018","url":null,"abstract":"<div><div>The synergetic technology of hydrodynamic cavitation (HC) and peroxydisulfate (PDS) has been adopted for the treatment of organic pollutants, while the rationale behind the thermal-activation of PDS in this process remains lacking. This paper presented investigation on the degradation of tetracycline under two types of operating conditions, including “internal reaction conditions” (pH value and TC/PDS molar ratio) and “external physical conditions” (hole shape, solution temperature and inlet pressure). Special emphasis was paid on the analysis of thermal effects through a robust modeling approach. The results showed that a synergy index of 6.26 and a degradation rate of 56.71 % could be obtained by the HC-PDS process, respectively, when the reaction conditions were optimized. Quenching experiment revealed that •OH and •SO₄^- were the predominant free radicals and their contribution to the degradation was 75.4 % and 24.6 % respectively, since a part of •SO₄^- was transformed into •OH in the solution. The thermal activation of PDS mainly occurred near the hole where the fitting temperature was around 340 K, while •OH was generated in the bubble collapse region downstream the hole, where the temperature was much higher and favorable for the cleavage of water molecular. The average temperature under different external physical conditions was in good consistence with the degradation rates. This research developed a useful method to effectively evaluate the activation extent of PDS by HC and could provide reliable guidance for further development of cavitational reactors to treat organic pollutants based on this hybrid approach.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 73-85"},"PeriodicalIF":5.9,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157843","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":"Unseen streams tracing emerging contaminants from stormwater to surface water: A brief review","authors":"Wenyuan Yang ,&nbsp;Minghao Shi ,&nbsp;Tiantao Zhao ,&nbsp;Zuxin Xu ,&nbsp;Wenhai Chu","doi":"10.1016/j.jes.2024.11.017","DOIUrl":"10.1016/j.jes.2024.11.017","url":null,"abstract":"<div><div>Emerging contaminants (ECs) have raised global concern due to their adverse effect on ecosystems and human health. However, the occurrence and transport of ECs in stormwater remain unclear. The impact of ECs from stormwater on surface water quality and ecosystem health is also poorly documented. In this review, we examined the variations in EC concentrations in surface water resulting from stormwater. During the wet weather, the concentrations of most investigated ECs, e.g., microplastics, per- and polyfluoroalkyl substances, and vehicle-related compounds, significantly increase in surface water, indicating that stormwater may be a critical source of these contaminants. Furthermore, the potential pathways of ECs from stormwater enter surface water are outlined. Studies demonstrate that surface runoff and combined sewer overflows are important pathways for ECs, with discharges comparable to or exceeding those from wastewater treatment plants. Illicit connection also plays an important part in elevated EC concentrations in surface water. Overall, our findings underscore the importance of stormwater as a source for ECs in surface waters, and urge for increased emphasis on, and reinforcement of, stormwater monitoring and control measures to minimize the transport of ECs into receiving water bodies.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 96-110"},"PeriodicalIF":5.9,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158419","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":"Advancements in membrane technology for efficient POME treatment: A comprehensive review and future perspectives","authors":"Zahra Samavati,&nbsp;Pei Sean Goh,&nbsp;Ahmad Fauzi Ismail,&nbsp;Woei Jye Lau,&nbsp;Alireza Samavati,&nbsp;Be Cheer Ng,&nbsp;Mohd Sohaimi Abdullah","doi":"10.1016/j.jes.2024.11.010","DOIUrl":"10.1016/j.jes.2024.11.010","url":null,"abstract":"<div><div>The treatment of POME related contamination is complicated due to its high organic contents and complex composition. Membrane technology is a prominent method for removing POME contaminants on account of its efficiency in removing suspended particles, organic substances, and contaminants from wastewater, leading to the production of high-quality treated effluent. It is crucial to achieve efficient POME treatment with minimum fouling through membrane advancement to ensure the sustainability for large-scale applications. This article comprehensively analyses the latest advancements in membrane technology for the treatment of POME. A wide range of membrane types including forward osmosis, microfiltration, ultrafiltration, nanofiltration, reverse osmosis, membrane bioreactor, photocatalytic membrane reactor, and their combinations is discussed in terms of the innovative design, treatment efficiencies and antifouling properties. The strategies for antifouling membranes such as self-healing and self-cleaning membranes are discussed. In addition to discussing the obstacles that impede the broad implementation of novel membrane technologies in POME treatment, the article concludes by delineating potential avenues for future research and policy considerations. The understanding and insights are expected to enhance the application of membrane-based methods in order to treat POME more efficiently; this will be instrumental in the reduction of environmental pollution.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 730-761"},"PeriodicalIF":5.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519323","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":"Band gap regulation of MIL-101(Fe) via pyrazine-based ligands substitution for enhanced visible-light adsorption and its photo-Fenton-like application","authors":"Zongchen Li ,&nbsp;Jian Lu ,&nbsp;Renjie Pan ,&nbsp;Qi Fu ,&nbsp;Tian-Yang Zhang ,&nbsp;Bin Xu","doi":"10.1016/j.jes.2024.11.012","DOIUrl":"10.1016/j.jes.2024.11.012","url":null,"abstract":"<div><div>Regulating the photo-response region of iron metal-organic frameworks (Fe-MOFs) is a viable strategy for enhancing their practical application in the visible-light driven photo-Fenton-like process. This study developed a novel pyrazine-based Fe-MOFs (MIL-101(Fe)-Pz) by substituting the 1,4-dicarboxybenzene acid ligands in typical MIL-101(Fe) with 2,5-pyrazinedicarboxylic acid (PzDC), in which sodium acetate was used as coordinative modulator to control the crystal size (2–3 µm). The incorporation of Fe-pyridine N coordination structures originated from PzDC ligands gave MIL-101(Fe)-Pz narrowed band gap (1.45 eV) than MIL-101(Fe) (2.54 eV) resulting in improved visible-light adsorption capacity (λ &gt; 420 nm), and also increased the proportion of Fe(II) in the Fe-clusters. Thus MIL-101(Fe)-Pz exhibited a synergistic enhanced photo-Fenton-like catalytic performance under visible-light irradiation. The MIL-101(Fe)-Pz/H₂O₂/Vis system could degrade 99% of sulfamethoxazole within 30 min, which was 10-fold faster than that of the pristine MIL-101(Fe), it also effectively removed other organic micropollutants with high durability and stability. Mechanistic analysis revealed that the PzDC ligands substitution decreased the band gap of MIL-101(Fe), giving MIL-101(Fe)-Pz appropriate band structure (-0.40∼1.05 V vs. NHE) which can cover several light-driven process for the generation of reactive oxygen species, including Fe(III) reduction and H₂O₂ activation for accelerating ^•OH generation, as well as oxygen reduction reaction for generating H₂O₂, <span><math><msubsup><mi>O</mi><mrow><mn>2</mn></mrow><mrow><mo>•</mo><mo>−</mo></mrow></msubsup></math></span> and ¹O₂. This study highlights the role of pyridine-N containing ligands in regulating the band structure of Fe-MOFs, providing valuable guidance for the design of Fe-MOFs photocatalysts.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 762-772"},"PeriodicalIF":5.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519228","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":"Light-dependent Br-org production in terrestrial plants under acetaminophen stress and the bromination mechanisms mediated by photosystem","authors":"Min Dong ,&nbsp;Kai Zheng ,&nbsp;Zhonglan Shen ,&nbsp;Chunguang Liu","doi":"10.1016/j.jes.2024.10.023","DOIUrl":"10.1016/j.jes.2024.10.023","url":null,"abstract":"<div><div>Due to the endocrine toxicity, neurotoxic, and reproductive toxicity to organisms, the sources and risks of brominated organic pollutants have attracted widespread attention. However, knowledge gaps remain in the bromination processes of emerging phenolic pollutants in plants, which may increase the potential health risk associated with food exposure. Our study discovered that light induced generation and accumulation of more toxic brominated organic compounds (Br-org) in lettuce leaves under the stress of acetaminophen (ACE) than that without light, as evidenced by an increase in C-Br bond intensity in FTIR analysis. This result can be explained by the oxidation of bromide ions (Br^-) by reactive species (ROS and ³Chl*) of chloroplast into reactive bromine species (RBS). The main mechanism is that the redox of Br^- reduced the oxidative damage of ACE to the structure and function of chloroplasts, providing good conditions for light energy uptake and utilization and promoting the increase of pigments and active species. Compared with the dark group exposed to 5 mg/L Br^-, the pigment content, H₂O₂ and ¹O₂ level of the light group increased by 56%, 84% and 69%, respectively. On the other hand, RBS attacks certain electrophilic organic compounds in leaves to generate Br-org. Triple excited state of chlorophyll (³Chl*) was the dominant species for the transformation of ACE, while RBS is a key factor in the generation of Br-org in the Br^-/light/chlorophyll system. A total of six transformation products were identified by HPLC-MS/MS, which were involved in three transformation pathways: methylation, hydroxyl oxidation and hydroxylation followed by bromination. This is the first report that Br^- could enter the chloroplast and improved chloroplast structure under ACE stress, and elucidated the bromination mechanism of organics in terrestrial plant involving of biophotochemical bromination in chloroplast besides enzyme-catalyzed bromination. This study is beneficial for risk assessment and prevention of emerging phenolic pollutants.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"153 ","pages":"Pages 275-288"},"PeriodicalIF":5.9,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143039492","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":"Insight into ventilation air methane combustion of ultralow sub-nanometer palladium catalyst within the MFI zeolite","authors":"Xueli Zhang ,&nbsp;Tao Zhu ,&nbsp;Shuai Liu ,&nbsp;Baisheng Nie ,&nbsp;Bo Yuan ,&nbsp;Yiwei Han","doi":"10.1016/j.jes.2024.10.035","DOIUrl":"10.1016/j.jes.2024.10.035","url":null,"abstract":"<div><div>Methane's complete catalytic oxidation process has been widely studied, but efficient catalytic oxidation of low-concentration methane (≤0.75 %) remains a crucial problem in the coal chemical industry. How to prevent the sintering deactivation of the active component in Pd-based catalysts and achieve efficient and stable operation of sub-nanometer catalysts remains challenging. Here, we utilize the interaction between amine ligands and Pd nanoparticles to stabilize and encapsulate the Pd particles within the pores of a molecular sieve carrier, effectively promoting the high dispersion of Pd particles. By leveraging the low acidity, high hydrophobicity, and high hydrothermal stability of the zeolite carrier, the Pd@S-1 catalyst exhibits excellent activity and stability in the catalytic oxidation of methane at low concentrations. Finally, density functional theory is employed to investigate the reaction mechanism of low-concentration methane during the catalytic process. Encapsulating the active metal component in zeolite to improve catalytic activity and stability provides a theoretical basis and direction for preparing complete oxidation catalysts for low-concentration methane.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 1-12"},"PeriodicalIF":5.9,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158379","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}