Journal of Environmental Sciences-china最新文献

{"title":"Synthesis of Pd/SiO2 catalyst with outstanding ambient-temperature formaldehyde decomposition via NH3 treatment of silica supports","authors":"Xiaofeng Liu ,&nbsp;Yuqin Lu ,&nbsp;Yufeng Chi ,&nbsp;Chunxi Lin ,&nbsp;Xudong Chen ,&nbsp;Qi Qin","doi":"10.1016/j.jes.2024.09.013","DOIUrl":"10.1016/j.jes.2024.09.013","url":null,"abstract":"<div><div>Formaldehyde (HCHO) is a significant indoor pollutant found in various sources and poses potential health risks to humans. Noble metal catalysts show efficient and stable catalytic activity for ambient-temperature HCHO oxidation, yet suffer from low metal utilization. Efforts focus on designing catalysts with enhanced intrinsic activity and reduced noble metal loading. In this study, we developed a simple pretreatment method using ammonia solution on SiO₂ carrier to enhance the activity of the Pd/SiO₂ catalyst for HCHO oxidation. After the carrier was pretreated with an ammonia solution, a significant promoting effect was observed on the Pd/SiO₂(NH₃·H₂O)-R catalyst. It achieved almost complete oxidation of 150 ppmV of HCHO at 25 °C, much better than the Pd/SiO₂-R (5% HCHO conversion rate). Multiple characterization results indicated that the ammonia solution pretreatment of the SiO₂ carrier increased the surface defects, facilitating the anchoring of Pd nanoparticles and increasing their dispersion. The increase dispersion of Pd resulted in the generation of additional oxygen vacancies on the catalyst surfaces. The increased in oxygen vacancies on the catalyst was beneficial for enhancing the catalyst's ability to activate H₂O to form surface hydroxyl groups, thereby accelerating the catalytic oxidation process of HCHO. The reaction mechanism of HCHO on the Pd/SiO₂(NH₃·H₂O)-R catalyst mainly follows an efficient pathway: firstly, the HCHO being oxidized by surface active hydroxyl groups to formate; subsequently, the formate being oxidized by hydroxyl groups to H₂O and CO₂. This study provides a promising strategy for designing high-performance noble metal catalysts for HCHO catalytic oxidation.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 774-783"},"PeriodicalIF":5.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152743","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":"Connecting volatile organic compounds exposure to osteoporosis risk via oxidative stress based on adverse outcome pathway methodology","authors":"Haolong Zhou ,&nbsp;Zhangbo Cui ,&nbsp;Dongsheng Di ,&nbsp;Ziwei Chen ,&nbsp;Xinyue Zhang ,&nbsp;Danyang Ling ,&nbsp;Qi Wang","doi":"10.1016/j.jes.2024.09.010","DOIUrl":"10.1016/j.jes.2024.09.010","url":null,"abstract":"<div><div>Existing evidence has demonstrated the association between exposure to volatile organic compounds (VOCs) and osteoporosis (OP) risk, but the underlying mechanistic framework remains unclear. This study aimed to explore potential pathways using adverse outcome pathway (AOP) analysis, and evidence this association in middle-to-old-aged American adults using the updated National Health and Nutrition Examination Survey data. Multivariable-adjusted general linear and weighted quantile sum models were employed to analyze associations of VOC metabolites (VOCMs), representing internal VOCs exposure levels, with OP-related phenotypes. An AOP framework based on network analysis was developed by extracting target genes and phenotypes. Among 3555 American adults aged ≥ 40 years (539 OP participants), we found that increasing urinary 3- and 4-methylhippuric acid, N-acetyl-S-(n-propyl)-l-cysteine (BPMA), and N-acetyl-S-(3-hydroxypropyl)-l-cysteine were associated with elevated OP odds with odds ratios (ORs) (95 % confidence intervals, 95 % CIs) being 1.254 (1.016 to 1.548), 1.182 (1.014 to 1.377), and 1.244 (1.029 to 1.505), respectively, per standard deviation. Urinary BPMA and N-acetyl-S-(2-cyanoethyl)-l-cysteine were inversely associated with lumbar spine bone mineral density (BMD), while urinary N-acetyl-S-(2-hydroxypropyl)-l-cysteine was positively associated with hip BMD. Additionally, OP odds increased by 46.0 % (95 % CI: 3.9 % to 105.1 %) per quartile increment in the VOC mixture. AOP analysis identified 53 target genes and 9 target phenotypes, and 5 of 9 target phenotypes were oxidative stress (OS)-related. Literature and the “AOP 482″ framework implied the core role of OS in the VOC exposure and prevalent OP association, with the interleukin-6 as the molecular initiating event. Our findings provided a theoretical basis for further investigation.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 806-817"},"PeriodicalIF":5.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519226","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":"Endocrine-disrupting chemicals in human adipose tissue and associations between exposure and obesity","authors":"Zhenhua Lu ,&nbsp;Aijing Li ,&nbsp;Yue Gao ,&nbsp;Haowei Shi ,&nbsp;Xiaolei Shi ,&nbsp;Weijing Li ,&nbsp;Jinghai Song ,&nbsp;Maoyong Song","doi":"10.1016/j.jes.2024.09.008","DOIUrl":"10.1016/j.jes.2024.09.008","url":null,"abstract":"<div><div>Bio-accumulation of endocrine-disrupting chemicals (EDCs) in human body may result in various adverse health effects. This study measured the levels of 16 EDCs in the visceral adipose tissue of 55 participants in China and investigated their association with obesity. MeP, BPP, PrP, BPA, EtP, BPE, and BPC were frequently detected in more than 50 % of the adipose tissues. A positive correlation between bisphenol A and body mass index (BMI) was observed in both multivariate linear regression model (β = 0.87, 95 % confidence interval: 0.21-1.53, <em>p</em> = 0.011) and multivariate logistic regression analysis (odds ratio = 1.28, 95 % confidence interval: 1.01-1.62, 0.044). Restricted cubic spline regression analysis revealed a significant nonlinear association between bisphenol P and BMI. Weighted quantile sum regression and quantile-based g-computation revealed a slight positive trend between EDCs mixed exposure and BMI, with bisphenol A as the primary contributor to the positive correlation with BMI. Our findings suggest the extensive existence of environmental EDCs in the adipose tissue of the adult Chinese population and indicate that exposure to BPA in adipose tissue may be associated with the occurrence of obesity.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 552-561"},"PeriodicalIF":5.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474570","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":"Efficient three-dimensional electrochemical degradation of alizarin red by CeO2−MnO2/NF particle electrode synergized with ozone","authors":"Ke Hu ,&nbsp;Fangyuan Zhao ,&nbsp;Faqin Dong ,&nbsp;Xingyu Zhang ,&nbsp;Lin Zhou ,&nbsp;Ming Guo","doi":"10.1016/j.jes.2024.09.003","DOIUrl":"10.1016/j.jes.2024.09.003","url":null,"abstract":"<div><div>In this study, nickel foam-loaded Mn and Ce bimetallic oxide composites were successfully synthesized as particle electrodes by a hydrothermal method and synergized with ozone for the efficient degradation of alizarin red (AR), a typical anthraquinone dye. The effects of common factors on the degradation rate of alizarin red were investigated. The optimal experimental conditions were derived as applied voltage = 3.5 V, initial pH = 5.5, NaCl concentration of 4.5 g/L, and initial dye concentration of 20 mg/L. The particle electrode had a high cyclic stability after five cycles. The active sites of the dye molecular structure were analyzed in combination with the Fukui function, and the degradation pathway of alizarin red was proposed on this basis. By comparing the degradation effect of alizarin red under three different systems of O₃, 3DER and 3DER-O₃, it was confirmed that the three-dimensional electrode has a good synergistic effect in conjunction with ozone. Finally, the degradation mechanism of alizarin red under the CeO₂-MnO₂/NF synergistic ozone system was derived, in which the single linear oxygen (¹O₂) played a major role in the degradation process.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 365-377"},"PeriodicalIF":5.9,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151565","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":"Anchoring nanoscale zero-valent iron within bacterial cellulose particles for boosting efficient adsorption of Co(II) and Sr(II) from seawater: Dual system and varying adsorption mechanisms","authors":"Rong Cheng ,&nbsp;Yating Chen ,&nbsp;Mi Kang ,&nbsp;Peiwen Jiang ,&nbsp;Lei Shi ,&nbsp;Jianzhong Zheng ,&nbsp;Xiang Zheng ,&nbsp;Jianlong Wang","doi":"10.1016/j.jes.2024.09.005","DOIUrl":"10.1016/j.jes.2024.09.005","url":null,"abstract":"<div><div>Increasing attention has been paid to radioactive wastewater to direct discharge in Japan or accidental leaks. Strontium-90 (⁹⁰Sr) and Cobalt-60 (⁶⁰Co) are the most hazardous nuclides in waste discharged form nuclear reactors. Because of their high solubility and long half-lives, these radioisotopes can persist for hundreds of years before decaying to negligible levels. Herein, a green and biodegradable material nanoscale zero-valent iron (nZVI) supported by bacterial cellulose particles (BCP-nZVI) is constructed for the first time to adsorb Co²⁺ and Sr²⁺ in single and binary systems. BCP-nZVI shows superior adsorption capacities of Co²⁺ and Sr²⁺in a single system within a wide range of pH values from 5 to7, while the coexistence of Co²⁺ adsorption inhibits the Sr²⁺ in binary system. Pseudo-second-order dynamics model and Langmuir isothermal model can be indicated the BCP-nZVI adsorption progress with 107.10 mg/g (Co²⁺) and 64.96 mg/g (Sr²⁺) maximum adsorption capacity. BCP-nZVI has outstanding stability, allowing it to be stored for more than one month with compromising its performance. More importantly, BCP-nZVI exhibits exceptional removal efficiency of Co²⁺(92.53 %) and Sr²⁺(58.62 %) removal in natural seawater systems. The mechanism investigation illustrates the high adsorption capacity of BCP-nZVI for Co²⁺ is controlled by redox and hydroxyl complexation. While Sr²⁺ is controlled by hydroxyl complexed adsorption, thus it has weak against interference by cations like Na⁺, Ca²⁺, etc. BCP-nZVI exhibits the advantages of high adsorption capacity, wide pH range, strong stability, and good applicability in natural seawater, which has excellent potential for application in radioactive ions removal.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 457-469"},"PeriodicalIF":5.9,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151621","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":"Energy metabolism disturbance induced by atorvastatin exposure on yellowstripe goby (Mugilogobius chulae) larvae based on transcriptome and metabolome analysis","authors":"Yufei Zhao ,&nbsp;Yimeng Wang ,&nbsp;Weibo Gong ,&nbsp;Chunni Duan ,&nbsp;Jinzhi Ren ,&nbsp;Huiyu Zhang ,&nbsp;Xiangping Nie","doi":"10.1016/j.jes.2024.09.001","DOIUrl":"10.1016/j.jes.2024.09.001","url":null,"abstract":"<div><div>Atorvastatin (ATV), a commonly prescribed lipid-lowering drug, has been widely detected in various aquatic environments due to its large use and low degradation rate. Since the target gene inhibited by ATV is highly conserved in organisms, many studies have shown that ATV can interfere with lipid metabolism in aquatic non-target organisms. However, studies on mitochondria, energy metabolism, and developmental toxicity of ATV on non-target organisms are limited. In this study, <em>Mugilogobius chulae</em> embryos were exposed to ATV (0.5 and 50 µg/L) until 96 hour post fertilization (hpf). The results confirmed that the environmental concentrations of ATV caused toxic effects including developmental malformations, pathological damage, hepatotoxicity, and oxidative stress in <em>M. chulae</em> larvae<em>.</em> Both transcriptomic and metabolomic analyses showed that ATV exposure interfered the normal processes of oxidative phosphorylation and TCA cycle, resulting in energy metabolic disorder. In addition, ATV exposure also damaged the mitochondrial structure of <em>M. chulae</em> larvae. Thus, <em>M. chulae</em> could regulate PI3K/AMPK/FoxO proteins to promote mitochondrial regeneration, support autophagy, and even initiate apoptosis to maintain metabolism homeostasis. Taken together, our findings suggested that mitochondrial dysfunction and metabolic disorder were involved in ATV-induced toxicity which may cause developmental malformations and abnormalities, providing novel insight into the toxic mechanisms of ATV.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 475-487"},"PeriodicalIF":5.9,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428914","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":"Formation of highly toxic p-benzoquinones byproducts during ozonation of cresols","authors":"Weixu Tang ,&nbsp;Jianjian Wei ,&nbsp;Shuting Wang ,&nbsp;Qiang Cheng ,&nbsp;Aroob Abid ,&nbsp;Jia Gu ,&nbsp;Min Zheng ,&nbsp;Dehua Ma","doi":"10.1016/j.jes.2024.08.034","DOIUrl":"10.1016/j.jes.2024.08.034","url":null,"abstract":"<div><div>This study aims to identify the highly non-specific toxic by-products during ozonation of three cresols in wastewater. In ozonated effluents, biotoxicity increased along with increasing reaction time, followed by a gradual decrease. The peak biotoxicity for ozonated <em>o</em>-cresol (<em>o</em>-C), <em>m</em>-cresol (<em>m</em>-C), and <em>p</em>-cresol (<em>p</em>-C) was estimated to be 17.4, 14.8 and 5.5 times higher than that of untreated wastewater, respectively. A redox-directed approach with high-resolution mass spectrometry detection and toxicity prediction revealed that monomeric para-benzoquinones (<em>p</em>-BQs), hydroxylated <em>p</em>-BQs, and dimeric <em>p</em>-BQs in ozonated cresols were the primary contributors to the increased toxicity. Calculations based on density functional theory indicated formation pathways of <em>p</em>-BQs byproducts, e.g., the formation of 2-methyl-<em>p</em>-benzoquinone was likely induced by ozone molecules rather than hydroxyl radicals in ozonated <em>o</em>-C and <em>m</em>-C, and the formation of <em>p</em>-BQs during ozonation of <em>p</em>-C was attributed to the oxidation of methyl group to carboxyl group and subsequent decarboxylation initiated by hydroxyl radicals. Electron paramagnetic resonance and spin density calculation showed that the presence of carbon-centered cresoxyl radicals was responsible for dimeric <em>p</em>-BQs formation. Collectively, these results underscore significant contribution of non-halogenated <em>p</em>-BQs to non-specific toxicity increase in ozonated effluents.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 495-508"},"PeriodicalIF":5.9,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151622","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":"ZnSnO3-derived ZnSnO3/ZIF-8 composites with enhanced adsorption and photocatalytic activity in RhB degradation and CO2 reduction","authors":"Yuxin Chu ,&nbsp;Chunran Zhao ,&nbsp;Yekang Zheng ,&nbsp;Xujie Ren ,&nbsp;Shude Yuan ,&nbsp;Leihong Zhao ,&nbsp;Ying Wu ,&nbsp;Yiming He","doi":"10.1016/j.jes.2024.08.033","DOIUrl":"10.1016/j.jes.2024.08.033","url":null,"abstract":"<div><div>This study aims to increase the photoactivity of ZnSnO₃ by modifying it with zeolitic imidazolate framework-8 (ZIF-8). The composite catalyst was prepared by a straightforward hydrothermal method using ZnSnO₃ as the zinc source. The in-situ generated ZnSnO₃/ZIF-8 composite exhibits a strong interaction between ZnSnO₃ and ZIF-8, which benefits electron transfer. Band structure analysis shows that ZIF-8 has a higher conduction band and a lower valence band than ZnSnO₃, and cannot form a typical heterojunction. However, defects in ZIF-8 may act as electron traps, accepting electrons from the conduction band of ZnSnO₃. This atypical heterojunction results in the spatial separation of charge carriers within the composite. The transient photocurrent response, electrochemical impedance spectroscopy, and photoluminescence analysis confirmed this hypothesis. Meanwhile, ZIF-8 also plays a role in adsorbing dyes and concentrating reactants due to its extremely high specific surface area. Therefore, the ZnSnO₃/ZIF-8 composite exhibits significantly improved photocatalytic performance in Rhodamine B degradation. The degradation rate of the best sample was 10.4 times that of ZnSnO₃. Active species capture experiments showed that holes and superoxide radicals were the main active species. Additionally, the ZnSnO₃/ZIF-8 composite showed enhanced photocatalytic activity in CO₂ reduction. This study may show new insights into the design of efficient photocatalytic materials using metal-organic framework materials.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 444-456"},"PeriodicalIF":5.9,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151560","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":"Nutrient recharge effect of Yangtze River to tributary backwater area in Three Gorges Reservoir, China","authors":"Wei Yin ,&nbsp;Chao Wang ,&nbsp;Shidian Wu ,&nbsp;Fei Wu ,&nbsp;Xiaokang Xin ,&nbsp;Fengpeng Bai ,&nbsp;Feixi Zhao ,&nbsp;Haiyan Jia ,&nbsp;Hong Zhang","doi":"10.1016/j.jes.2024.08.031","DOIUrl":"10.1016/j.jes.2024.08.031","url":null,"abstract":"<div><div>Interaction between the Yangtze River and its tributaries in the Three Gorges Reservoir has an important influence on tributary algal blooms. Taking the Xiaojiang River as a typical tributary, a binary mixing model used stable isotopes of hydrogen and oxygen to quantitatively analyze the water contribution and nutrient source structure of the tributary backwater area. Results showed that the isotope content (δD: −54.7‰, δ¹⁸O−7.8‰) in the Yangtze River was higher than that in the tributaries (δD:−74.2‰, δ¹⁸O−17.0‰) in the non-flood season and lower than that in the tributaries in the flood season. The Yangtze River contributed more than 50% water volume of the tributary backwater area in the non-flood season. The total nitrogen and total phosphorus concentrations in the backwater area were estimated based on water contribution ratio, and the results were in good agreement with the monitoring results. Load estimation showed that the nitrogen and phosphorus contribution ratio of the Yangtze River to the tributary backwater area was approximately 40%-80% in the non-flood season, and approximately 20%-40% in the flood season, on average. This study showed that the interaction between the Xiaojiang River and the Yangtze River is significant, and that Yangtze River recharge is an important source of nutrients in the Xiaojiang backwater area, which may play a driving role in Xiaojiang River algal blooms.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 426-435"},"PeriodicalIF":5.9,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151558","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 characterization of ambient levoglucosan in Beijing during summertime: Dynamic variation and source contributions under strong cooking influences","authors":"Jun Wang ,&nbsp;Weiwei Hu ,&nbsp;Tianle Pan ,&nbsp;Yingkun Wang ,&nbsp;Wei Chen ,&nbsp;Tingting Feng ,&nbsp;Yiyu Cai ,&nbsp;Zi Tao ,&nbsp;Wenhui Zhao ,&nbsp;Zhaoce Liu ,&nbsp;Jingxiong Liu ,&nbsp;Shaofei Kong ,&nbsp;Jipeng Qi ,&nbsp;Xiaoxiao Zhang ,&nbsp;Yuwen Peng ,&nbsp;Yuan Liu ,&nbsp;Shan Huang ,&nbsp;Bin Yuan ,&nbsp;Min Shao ,&nbsp;Xinming Wang","doi":"10.1016/j.jes.2024.08.029","DOIUrl":"10.1016/j.jes.2024.08.029","url":null,"abstract":"<div><div>Particulate levoglucosan is an important tracer for biomass burning emission in ambient air. However, recent studies question its reliability as a biomass burning tracer in Chinese mega cities due to important contribution from potential non-biomass burning sources, such as cooking. To address this, we examined the dynamic variation and sources of levoglucosan using a chemical ionization mass spectrometer and other advanced instruments during Beijing's summer of 2021. The average mass concentration of levoglucosan and its isomer (C₆H₁₀O₅) was 0.025 ± 0.014 µg/m³, constituting 0.55 % ± 0.32 % of total organic carbon (OC) in this campaign. Despite cooking emissions contributing significantly to the organic aerosol (OA, 20 %), levoglucosan and its isomers correlated more strongly with biomass-burning related tracers (<em>R</em> &gt; 0.6), black carbon (<em>R</em> = 0.72) and less so with cooking-related sources (<em>R</em> = 0.3). This indicates that levoglucosan is primarily dominated by biomass-burning emissions rather than cooking in Beijing's urban areas during summertime. The diurnal variation of levoglucosan concentrations highlighted the importance of daytime and nocturnal biomass burning emissions during polluted periods in Beijing. Using levoglucosan as a tracer to quantify the biomass burning OC (BBOC), we found good agreement on the time series of BBOC between the tracer method and other independent source apportionment method. This reaffirms the reliability of levoglucosan as a biomass burning tracer. Biomass burning contributed an average of 7 %-8 % to OC, highlighting its significant impact on Beijing's summer air quality. Our study enhances understanding of biomass burning influences on ambient aerosol in typical urban areas.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 205-220"},"PeriodicalIF":5.9,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158381","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}