Environmental Science & Technology Letters Environ.最新文献

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New Insights into the Mechanism of the UV/Sulfite Process: Formation of SO2•– Radicals and Their Derivatives under Acidic Conditions 紫外线/亚硫酸盐过程机理的新见解:酸性条件下二氧化硫自由基及其衍生物的形成
IF 8.9 2区 环境科学与生态学
Environmental Science & Technology Letters Environ. Pub Date : 2024-06-26 DOI: 10.1021/acs.estlett.4c00251
Linghao Kong, Zhe Jin, Feng Zhu, Mengchang He, Feng Qian and Xianjia Peng*, 
{"title":"New Insights into the Mechanism of the UV/Sulfite Process: Formation of SO2•– Radicals and Their Derivatives under Acidic Conditions","authors":"Linghao Kong,&nbsp;Zhe Jin,&nbsp;Feng Zhu,&nbsp;Mengchang He,&nbsp;Feng Qian and Xianjia Peng*,&nbsp;","doi":"10.1021/acs.estlett.4c00251","DOIUrl":"10.1021/acs.estlett.4c00251","url":null,"abstract":"<p >The UV/sulfite process shows great potential for reductively degrading or eliminating pollutants. While its mechanism in neutral and alkaline environments has been well-elucidated, the reaction pathway under acidic conditions remains unclear. Herein, we report the novel findings of the formation of reductive SO<sub>2</sub><sup>•–</sup> radicals and their derivatives in the UV/sulfite process at pH levels below 4. Mechanistic investigation revealed that H• radicals and SO<sub>3</sub><sup>•–</sup> radicals formed by the photolysis of sulfite under acidic conditions, with the H• radicals being scavenged by sulfite to produce SO<sub>2</sub><sup>•–</sup> radicals. Subsequently, these SO<sub>2</sub><sup>•–</sup> radicals are transformed into dithionite, thiosulfate, hydrogen sulfide, and elemental sulfur through a series of intricate reactions. This study is expected to expand the potential application of the UV/sulfite process under acid conditions.</p>","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":null,"pages":null},"PeriodicalIF":8.9,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522076","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}
引用次数: 0
Landfill Gas: A Major Pathway for Neutral Per- and Polyfluoroalkyl Substance (PFAS) Release 垃圾填埋气:中性全氟和多氟烷基物质 (PFAS) 释放的主要途径
IF 8.9 2区 环境科学与生态学
Environmental Science & Technology Letters Environ. Pub Date : 2024-06-26 DOI: 10.1021/acs.estlett.4c00364
Ashley M. Lin, Jake T. Thompson, Jeremy P. Koelmel, Yalan Liu, John A. Bowden and Timothy G. Townsend*, 
{"title":"Landfill Gas: A Major Pathway for Neutral Per- and Polyfluoroalkyl Substance (PFAS) Release","authors":"Ashley M. Lin,&nbsp;Jake T. Thompson,&nbsp;Jeremy P. Koelmel,&nbsp;Yalan Liu,&nbsp;John A. Bowden and Timothy G. Townsend*,&nbsp;","doi":"10.1021/acs.estlett.4c00364","DOIUrl":"10.1021/acs.estlett.4c00364","url":null,"abstract":"<p >The undisclosed and ubiquitous use of perfluoroalkyl and polyfluoroalkyl substances (PFAS) in consumer products has led to a growing issue of environmental pollution, particularly within the solid waste community, where the fate of volatile (neutral) PFAS in landfilled refuse is not well understood. Here, three municipal solid waste landfills in Florida were assessed for neutral PFAS in landfill gas and ionic PFAS in landfill leachate to compare the relative mobility between the two pathways. Landfill gas was directly sampled using a high volume, XAD-2 resin based sampling approach developed for adsorption and analysis of 27 neutral PFAS. Across sites, 13 neutral PFAS were identified from fluorotelomer alcohol (FTOH), fluorotelomer olefin (FTO), secondary FTOH, fluorotelomer acetate (FTOAc), and fluorotelomer methyl acrylate (FTMAc) classes; however, FTOHs dominated concentrations (87–97% total neutral PFAS), with most detections surpassing utilized calibration levels. Even under conservative assumptions, the mass of fluorine leaving in landfill gas (32–76%) was comparable to or greater than the mass leaving in landfill leachate (24–68%). These findings suggest that landfill gas, a less scrutinized byproduct, serves as a major pathway for the mobility of PFAS from landfills.</p>","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":null,"pages":null},"PeriodicalIF":8.9,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522074","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}
引用次数: 0
Control of Micropollutants in Water by Far-UVC Photolysis of Peracetic Acid 通过远紫外光分解过乙酸控制水中的微污染物
IF 8.9 2区 环境科学与生态学
Environmental Science & Technology Letters Environ. Pub Date : 2024-06-25 DOI: 10.1021/acs.estlett.4c00384
Ran Yin*, Xinyi Ruan, Jiadong Peng, Jing Zhao, Yuliang Zhang, Arnaud Heuzard and Chii Shang, 
{"title":"Control of Micropollutants in Water by Far-UVC Photolysis of Peracetic Acid","authors":"Ran Yin*,&nbsp;Xinyi Ruan,&nbsp;Jiadong Peng,&nbsp;Jing Zhao,&nbsp;Yuliang Zhang,&nbsp;Arnaud Heuzard and Chii Shang,&nbsp;","doi":"10.1021/acs.estlett.4c00384","DOIUrl":"10.1021/acs.estlett.4c00384","url":null,"abstract":"<p >Increasing radical yields to reduce energy consumption for micropollutant degradation would make advanced oxidation processes more sustainable in the context of the United Nations’ Sustainable Development Goals and carbon neutrality. We herein demonstrate that switching the UV radiation source from conventional low-pressure UV (UV<sub>254</sub>) to far-UVC (UV<sub>222</sub>) increases the UV fluence-based concentration of hydroxyl radicals (HO<sup>•</sup>) in the UV/peracetic acid (UV/PAA) process by 4.1-fold and 27.9-fold in deionized water and real surface water, respectively. Acetyloxyl radicals (CH<sub>3</sub>C(O)O<sup>•</sup>) are generated in the UV<sub>222</sub>/PAA process at a steady-state concentration of 2.4 × 10<sup>–12</sup> M in deionized water, while they are undetectable in the UV<sub>254</sub>/PAA process under the comparable conditions. The enhancement to radical production is mainly attributed to the 15.7-fold higher molar absorption coefficients of PAA<sup>0</sup> at 222 nm than 254 nm (50 vs 3.5 M<sup>–1</sup> cm<sup>–1</sup>), which suppresses the compromised 1.1-fold lower innate quantum yield at 222 nm than 254 nm (0.78 vs 0.86 mol einstein<sup>–1</sup>). The enhanced radical generation and direct photolysis promote the fluence-based degradation rate constants of bisphenol A, phenol, and nitrobenzene by 4.1-fold, 3.3-fold, and 2.9-fold in the UV<sub>222</sub>/PAA process than the UV<sub>254</sub>/PAA process.</p>","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":null,"pages":null},"PeriodicalIF":8.9,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522075","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}
引用次数: 0
Response to Comment on “Size-Resolved Elemental Composition of Respiratory Particles in Three Healthy Subjects” 对 "三位健康受试者呼吸道粒子的尺寸分辨元素组成 "评论的回应
IF 8.9 2区 环境科学与生态学
Environmental Science & Technology Letters Environ. Pub Date : 2024-06-25 DOI: 10.1021/acs.estlett.4c00484
Linsey C. Marr*, Zezhen Cheng, Weinan Leng, Swarup China and Aaron J. Prussin II, 
{"title":"Response to Comment on “Size-Resolved Elemental Composition of Respiratory Particles in Three Healthy Subjects”","authors":"Linsey C. Marr*,&nbsp;Zezhen Cheng,&nbsp;Weinan Leng,&nbsp;Swarup China and Aaron J. Prussin II,&nbsp;","doi":"10.1021/acs.estlett.4c00484","DOIUrl":"10.1021/acs.estlett.4c00484","url":null,"abstract":"","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":null,"pages":null},"PeriodicalIF":8.9,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.estlett.4c00484","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522077","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}
引用次数: 0
Comment on “Size-Resolved Elemental Composition of Respiratory Particles in Three Healthy Subjects” 关于 "三名健康受试者呼吸道颗粒的尺寸分辨元素组成 "的评论
IF 8.9 2区 环境科学与生态学
Environmental Science & Technology Letters Environ. Pub Date : 2024-06-25 DOI: 10.1021/acs.estlett.4c00243
Steven C. Hill*,  and , David C. Doughty*, 
{"title":"Comment on “Size-Resolved Elemental Composition of Respiratory Particles in Three Healthy Subjects”","authors":"Steven C. Hill*,&nbsp; and ,&nbsp;David C. Doughty*,&nbsp;","doi":"10.1021/acs.estlett.4c00243","DOIUrl":"10.1021/acs.estlett.4c00243","url":null,"abstract":"","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":null,"pages":null},"PeriodicalIF":8.9,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522073","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}
引用次数: 0
Response to Comment on “Drinking Boiled Tap Water Reduces Human Intake of Nanoplastics and Microplastics” 对 "饮用煮沸的自来水可减少人体对纳米塑料和微塑料的摄入 "评论的回应
IF 8.9 2区 环境科学与生态学
Environmental Science & Technology Letters Environ. Pub Date : 2024-06-21 DOI: 10.1021/acs.estlett.4c00475
Zimin Yu, Zhanjun Li* and Eddy Y. Zeng*, 
{"title":"Response to Comment on “Drinking Boiled Tap Water Reduces Human Intake of Nanoplastics and Microplastics”","authors":"Zimin Yu,&nbsp;Zhanjun Li* and Eddy Y. Zeng*,&nbsp;","doi":"10.1021/acs.estlett.4c00475","DOIUrl":"10.1021/acs.estlett.4c00475","url":null,"abstract":"","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":null,"pages":null},"PeriodicalIF":8.9,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502238","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}
引用次数: 0
Nanocluster Aerosols from Ozone–Human Chemistry Are Dominated by Squalene–Ozone Reactions 臭氧-人类化学作用产生的纳米团簇气溶胶主要由角鲨烯-臭氧反应产生
IF 8.9 2区 环境科学与生态学
Environmental Science & Technology Letters Environ. Pub Date : 2024-06-21 DOI: 10.1021/acs.estlett.4c00289
Shen Yang*,  and , Dusan Licina, 
{"title":"Nanocluster Aerosols from Ozone–Human Chemistry Are Dominated by Squalene–Ozone Reactions","authors":"Shen Yang*,&nbsp; and ,&nbsp;Dusan Licina,&nbsp;","doi":"10.1021/acs.estlett.4c00289","DOIUrl":"10.1021/acs.estlett.4c00289","url":null,"abstract":"<p >Nanocluster aerosols (NCAs, &lt;3 nm particles) are associated with climate feedbacks and potentially with human health. Our recent study revealed NCA formation owing to the reaction of ozone with human surfaces. However, the underlying mechanisms driving NCA emissions remain unexplored. Squalene is the most abundant compound in human skin lipids that reacts with ozone, followed by unsaturated fatty acids. This study aims to examine the contribution of the squalene–ozone reaction to NCA formation and the influence of ozone and ammonia (NH<sub>3</sub>) levels. In a climate-controlled chamber, we painted squalene and 6-hexadecenoic acid (C16:1n6) on glass plates to facilitate their reactions with ozone. The squalene–ozone reaction was further investigated at different ozone levels (15 and 90 ppb) and NH<sub>3</sub> levels (0 and 375 ppb). The results demonstrate that the ozonolysis of human skin lipid compounds contributes to NCA formation. With a typical squalene-C16:1n6 ratio found in human skin lipids (4:1), squalene generated 40 times more NCAs than did C16:1n6 and, thus, dominated NCA formation. More NCAs were generated with increased ozone levels, whereas increased NH<sub>3</sub> levels were associated with the stronger generation of larger NCAs but fewer of the smallest ones. This study experimentally confirms that NCAs are primarily formed from squalene–ozone reactions in ozone–human chemistry.</p>","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":null,"pages":null},"PeriodicalIF":8.9,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.estlett.4c00289","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522078","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}
引用次数: 0
Secondary Organic Aerosol Formation from Ambient Air in Summer in Urban Beijing: Contribution of S/IVOCs and Impacts of Heat Waves 北京城市夏季环境空气中二次有机气溶胶的形成:S/IVOCs 的贡献与热浪的影响
IF 8.9 2区 环境科学与生态学
Environmental Science & Technology Letters Environ. Pub Date : 2024-06-21 DOI: 10.1021/acs.estlett.4c00415
Zijun Zhang, Weiqi Xu, Siqi Zeng, Yongchun Liu, Tengyu Liu, Yi Zhang, Aodong Du, Yan Li, Ning Zhang, Junfeng Wang, Eleonora Aruffo, Pengfei Han, Jie Li, Zifa Wang and Yele Sun*, 
{"title":"Secondary Organic Aerosol Formation from Ambient Air in Summer in Urban Beijing: Contribution of S/IVOCs and Impacts of Heat Waves","authors":"Zijun Zhang,&nbsp;Weiqi Xu,&nbsp;Siqi Zeng,&nbsp;Yongchun Liu,&nbsp;Tengyu Liu,&nbsp;Yi Zhang,&nbsp;Aodong Du,&nbsp;Yan Li,&nbsp;Ning Zhang,&nbsp;Junfeng Wang,&nbsp;Eleonora Aruffo,&nbsp;Pengfei Han,&nbsp;Jie Li,&nbsp;Zifa Wang and Yele Sun*,&nbsp;","doi":"10.1021/acs.estlett.4c00415","DOIUrl":"10.1021/acs.estlett.4c00415","url":null,"abstract":"<p >Semivolatile and intermediate volatility organic compounds (S/IVOCs) are known as crucial precursors of secondary organic aerosols (SOA), yet their specific contributions to SOA in urban areas remain unclear. Here, we investigate the real-time SOA formation from urban ambient air in summer in Beijing utilizing an oxidation flow reactor (OFR), coupled with aerosol and proton-transfer-reaction mass spectrometers. Our results show that the maximum photochemical formation of SOA in the OFR reached 2.9 μg m<sup>–3</sup> at ∼1.5 days of photochemical age. Primary OA and less oxidized oxygenated OA experience mass loss at high photochemical ages (&gt;3 days) in the OFR, whereas more oxidized oxygenated OA continues to show mass enhancement, indicating the role of heterogeneous processes in the formation of highly aged SOA. Closure studies demonstrate that SOA estimated from the known precursors contribute 50.0 ± 17.3% of the measured SOA. The relatively low contribution (10.3 ± 5.2%) of IVOCs emphasizes the importance of unmeasured S/IVOCs in SOA formation. Furthermore, we illustrate the impact of heat waves on ambient SOA formation by enhancing photochemical oxidation and biogenic emissions in summer.</p>","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":null,"pages":null},"PeriodicalIF":8.9,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502239","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}
引用次数: 0
Toward Enhancing Wastewater Treatment with Resource Recovery in Integrated Assessment and Computable General Equilibrium Models 在综合评估和可计算一般均衡模型中利用资源回收加强废水处理
IF 8.9 2区 环境科学与生态学
Environmental Science & Technology Letters Environ. Pub Date : 2024-06-18 DOI: 10.1021/acs.estlett.4c00280
Jennifer B. Dunn*, Kristen Greene, Eveline Vasquez-Arroyo, Muhammad Awais, Adriana Gomez-Sanabria, Page Kyle, Ruslana R. Palatnik, Roberto Schaeffer, Pengxiao Zhou, Baya Aissaoui and Enrica De Cian, 
{"title":"Toward Enhancing Wastewater Treatment with Resource Recovery in Integrated Assessment and Computable General Equilibrium Models","authors":"Jennifer B. Dunn*,&nbsp;Kristen Greene,&nbsp;Eveline Vasquez-Arroyo,&nbsp;Muhammad Awais,&nbsp;Adriana Gomez-Sanabria,&nbsp;Page Kyle,&nbsp;Ruslana R. Palatnik,&nbsp;Roberto Schaeffer,&nbsp;Pengxiao Zhou,&nbsp;Baya Aissaoui and Enrica De Cian,&nbsp;","doi":"10.1021/acs.estlett.4c00280","DOIUrl":"10.1021/acs.estlett.4c00280","url":null,"abstract":"<p >Sustainable water management is essential to increasing water availability and decreasing water pollution. The wastewater sector is expanding globally and beginning to incorporate technologies that recover nutrients from wastewater. Nutrient recovery increases energy consumption but may reduce the demand for nutrients from virgin sources. We estimate the increase in annual global energy consumption (1,100 million GJ) and greenhouse gas emissions (84 million t CO<sub>2</sub>e) for wastewater treatment in the year 2030 compared to today’s levels to meet sustainable development goals. To capture these trends, integrated assessment and computable general equilibrium models that address the energy-water nexus must evolve. We reviewed 16 of these models to assess how well they capture wastewater treatment plant energy consumption and GHG emissions. Only three models include biogas production from the wastewater organic content. Four explicitly represent energy demand for wastewater treatment, and eight include explicit representation of wastewater treatment plant greenhouse gas emissions. Of those eight models, six models quantify methane emissions from treatment, five include representation of emissions of nitrous oxide, and two include representation of emissions of carbon dioxide. Our review concludes with proposals to improve these models to better capture the energy-water nexus associated with the evolving wastewater treatment sector.</p>","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":null,"pages":null},"PeriodicalIF":8.9,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.estlett.4c00280","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522050","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}
引用次数: 0
Decomposition of Clusters of Oxygenated Compounds with NO3– by Applying Voltage Scanning to Chemical Ionization Mass Spectrometry in Steady-State Experiments 在稳态实验中将电压扫描应用于化学电离质谱法,用 NO3- 分解含氧化合物团簇
IF 8.9 2区 环境科学与生态学
Environmental Science & Technology Letters Environ. Pub Date : 2024-06-18 DOI: 10.1021/acs.estlett.4c00276
Hui Wang, Yarê Baker, Hongru Shen, Rongrong Wu, Sungah Kang, Defeng Zhao, Andreas Wahner, Sören R. Zorn* and Thomas F. Mentel, 
{"title":"Decomposition of Clusters of Oxygenated Compounds with NO3– by Applying Voltage Scanning to Chemical Ionization Mass Spectrometry in Steady-State Experiments","authors":"Hui Wang,&nbsp;Yarê Baker,&nbsp;Hongru Shen,&nbsp;Rongrong Wu,&nbsp;Sungah Kang,&nbsp;Defeng Zhao,&nbsp;Andreas Wahner,&nbsp;Sören R. Zorn* and Thomas F. Mentel,&nbsp;","doi":"10.1021/acs.estlett.4c00276","DOIUrl":"10.1021/acs.estlett.4c00276","url":null,"abstract":"<p >Oxygenated volatile organic compounds (OVOCs) contribute to atmospheric secondary organic aerosols. To better constrain OVOC distributions, e.g., from the oxidation of phenolics, voltage scanning was applied for the targeted destruction of product nitrate (NO<sub>3</sub><sup>–</sup>) clusters in a chemical ionization mass spectrometer. Herein, the voltage difference at which half of the clusters remain (dV<sub>50</sub>) represents their bond strength. This study identified the type and relative bond strength of adducts for product distributions that can be observed for hours in our steady-state chamber (SAPHIR*). An unexpected increase was observed in voltage scanning curves of clusters containing nitrated phenols [e.g., C<sub>7</sub>H<sub>7</sub>NO<sub>3</sub>(NO<sub>3</sub><sup>–</sup>)], which was attributed to the declustering of double-analyte clusters [e.g., C<sub>14</sub>H<sub>14</sub>N<sub>2</sub>O<sub>6</sub>(NO<sub>3</sub><sup>–</sup>)] at small voltage differences. Double-analyte clusters were distinguished from accretion product clusters [e.g., C<sub>12</sub>H<sub>(10,12)</sub>O<sub><i>x</i></sub>(NO<sub>3</sub><sup>–</sup>)] by their significantly lower intermolecular forces. Misidentifying C<sub>14</sub>H<sub>14</sub>N<sub>2</sub>O<sub>6</sub> as accretion products could lead to an overestimation of its contribution to particle mass. In addition, the higher bonding strength in C<sub>6</sub>H<sub>(6,8)</sub>O<sub>4–9</sub>(NO<sub>3</sub><sup>–</sup>) compared to that in H<sub>2</sub>SO<sub>4</sub>(NO<sub>3</sub><sup>–</sup>) indicates maximum sensitivities of C<sub>6</sub>H<sub>(6,8)</sub>O<sub>4–9</sub> at the collision limit. We could elucidate the relative acidity of the analytes to HNO<sub>3</sub>. This study highlights additional dimensions gained from voltage scanning and suggests performing it to clarify the product distribution in complex urban air in the presence of nitrated phenols.</p>","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":null,"pages":null},"PeriodicalIF":8.9,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.estlett.4c00276","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502240","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}
引用次数: 0
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