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Celebrating and Charting a Future for ACS Environmental Au 庆祝并规划 ACS Environmental Au 的未来
Q2 Environmental Science Pub Date : 2024-01-17 DOI: 10.1021/acsenvironau.3c00080
Yi Jiang*,  and , Xiangdong Li*, 
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引用次数: 0
Per/Polyfluoroalkyl Substances (PFASs) in a Marine Apex Predator (White Shark, Carcharodon carcharias) in the Northwest Atlantic Ocean 西北大西洋一种海洋顶级掠食者(白鲨)体内的全氟/多氟烷基物质 (PFAS)
Q2 Environmental Science Pub Date : 2024-01-14 DOI: 10.1021/acsenvironau.3c00055
Jennifer Marciano, Lisa Crawford, Leenia Mukhopadhyay, Wesley Scott, Anne McElroy and Carrie McDonough*, 

Per/polyfluoroalkyl substances (PFASs) are ubiquitous, highly persistent anthropogenic chemicals that bioaccumulate and biomagnify in aquatic food webs and are associated with adverse health effects, including liver and kidney diseases, cancers, and immunosuppression. We investigated the accumulation of PFASs in a marine apex predator, the white shark (Carcharodon carcharias). Muscle (N = 12) and blood plasma (N = 27) samples were collected from 27 sharks during 2018–2021 OCEARCH expeditions along the eastern coast of North America from Nova Scotia to Florida. Samples were analyzed for 47 (plasma) and 43 (muscle) targeted PFASs and screened for >2600 known and novel PFASs using liquid chromatography coupled to high-resolution mass spectrometry (LC-HRMS). Perfluoroalkyl carboxylates with carbon chain-length C11 to C14 were frequently detected above the method reporting limits in plasma samples, along with perfluorooctanesulfonate and perfluorodecanesulfonate. Perfluoropentadecanoate was also detected in 100% of plasma samples and concentrations were estimated semiquantitatively as no analytical standard was available. Total concentrations of frequently detected PFASs in plasma ranged from 0.56 to 2.9 ng mL–1 (median of 1.4 ng mL–1). In muscle tissue, nine targeted PFASs were frequently detected, with total concentration ranging from 0.20 to 0.84 ng g–1 ww. For all frequently detected PFASs, concentrations were greater in plasma than in muscle collected from the same organism. In both matrices, perfluorotridecanoic acid was the most abundant PFAS, consistent with several other studies. PFASs with similar chain-lengths correlated significantly among the plasma samples, suggesting similar sources. Total concentrations of PFASs in plasma were significantly greater in sharks sampled off of Nova Scotia than all sharks from other locations, potentially due to differences in diet. HRMS suspect screening tentatively identified 13 additional PFASs in plasma, though identification confidence was low, as no MS/MS fragmentation was collected due to low intensities. The widespread detection of long-chain PFASs in plasma and muscle of white sharks highlights the prevalence and potential biomagnification of these compounds in marine apex predators.

全氟烷基/聚氟烃基物质(PFASs)是一种无处不在、具有高度持久性的人为化学物质,可在水生食物网中进行生物累积和生物放大,并与肝脏和肾脏疾病、癌症和免疫抑制等不良健康影响有关。我们研究了 PFASs 在海洋顶级捕食者白鲨(Carcharodon carcharias)体内的积累情况。在 2018-2021 年 OCEARCH 探险期间,我们沿着从新斯科舍到佛罗里达的北美东海岸收集了 27 条鲨鱼的肌肉(N = 12)和血浆(N = 27)样本。利用液相色谱耦合高分辨质谱法(LC-HRMS)分析了样本中的47种(血浆)和43种(肌肉)目标全氟辛烷磺酸,并筛查了>2600种已知和新型全氟辛烷磺酸。在血浆样本中检测到的碳链长度为 C11 至 C14 的全氟烷基羧酸盐以及全氟辛烷磺酸和全氟癸烷磺酸经常超过方法报告限值。此外,100% 的血浆样本中都检测到了全氟十五烷酸酯,由于没有分析标准,因此对其浓度进行了半定量估算。血浆中经常检测到的全氟辛烷磺酸总浓度介于 0.56 至 2.9 纳克 mL-1 之间(中位数为 1.4 纳克 mL-1)。在肌肉组织中,经常检测到九种目标 PFAS,总浓度范围为 0.20 至 0.84 纳克 g-1 ww。对于所有经常检测到的全氟辛烷磺酸,血浆中的浓度均高于从同一生物体采集的肌肉中的浓度。在这两种基质中,全氟十三烷酸是含量最高的全氟辛烷磺酸,这与其他几项研究结果一致。在血浆样本中,链长相似的全氟辛烷磺酸具有显著的相关性,表明其来源相似。在新斯科舍取样的鲨鱼血浆中 PFASs 的总浓度明显高于其他地点的所有鲨鱼,这可能是由于鲨鱼的饮食习惯不同造成的。HRMS 疑似筛选初步确定了血浆中另外 13 种全氟辛烷磺酸,但由于强度较低,没有收集到 MS/MS 片段,因此识别可信度较低。在大白鲨的血浆和肌肉中广泛检测到长链 PFASs 凸显了这些化合物在海洋顶级食肉动物中的普遍性和潜在的生物放大作用。
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引用次数: 0
Long-Term Robustness and Failure Mechanisms of Electrochemical Stripping for Wastewater Ammonia Recovery 用于废水氨回收的电化学剥离的长期稳健性和失效机理
Q2 Environmental Science Pub Date : 2024-01-12 DOI: 10.1021/acsenvironau.3c00058
Anna Kogler, Neha Sharma, Diana Tiburcio, Meili Gong, Dean M. Miller, Kindle S. Williams, Xi Chen and William A. Tarpeh*, 

Nitrogen in wastewater has negative environmental, human health, and economic impacts but can be recovered to reduce the costs and environmental impacts of wastewater treatment and chemical production. To recover ammonia/ammonium (total ammonia nitrogen, TAN) from urine, we operated electrochemical stripping (ECS) for over a month, achieving 83.4 ± 1.5% TAN removal and 73.0 ± 2.9% TAN recovery. With two reactors, we recovered sixteen 500-mL batches (8 L total) of ammonium sulfate (20.9 g/L TAN) approaching commercial fertilizer concentrations (28.4 g/L TAN) and often having >95% purity. While evaluating the operation and maintenance needs, we identified pH, full-cell voltage, product volume, and water flux into the product as informative process monitoring parameters that can be inexpensively and rapidly measured. Characterization of fouled cation exchange and omniphobic membranes informs cleaning and reactor modifications to reduce fouling with organics and calcium/magnesium salts. To evaluate the impact of urine collection and storage on ECS, we conducted experiments with urine at different levels of dilution with flush water, extents of divalent cation precipitation, and degrees of hydrolysis. ECS effectively treated urine under all conditions, but minimizing flush water and ensuring storage until complete hydrolysis would enable energy-efficient TAN recovery. Our experimental results and cost analysis motivate a multifaceted approach to improving ECS’s technical and economic viability by extending component lifetimes, decreasing component costs, and reducing energy consumption through material, reactor, and process engineering. In summary, we demonstrated urine treatment as a foothold for electrochemical nutrient recovery from wastewater while supporting the applicability of ECS to seven other wastewaters with widely varying characteristics. Our findings will facilitate the scale-up and deployment of electrochemical nutrient recovery technologies, enabling a circular nitrogen economy that fosters sanitation provision, efficient chemical production, and water resource protection.

废水中的氮会对环境、人类健康和经济产生负面影响,但可以通过回收氮来降低废水处理和化学品生产的成本和对环境的影响。为了从尿液中回收氨/铵(总氨氮,TAN),我们进行了一个多月的电化学汽提(ECS),实现了 83.4 ± 1.5% 的总氨氮去除率和 73.0 ± 2.9% 的总氨氮回收率。通过两个反应器,我们回收了 16 批 500 毫升(共 8 升)硫酸铵(20.9 克/升 TAN),接近商业肥料浓度(28.4 克/升 TAN),纯度通常为 95%。在评估运行和维护需求时,我们发现 pH 值、满池电压、产品体积和产品中的水通量都是可以廉价、快速测量的过程监控参数。污垢阳离子交换膜和全疏水膜的特征为清洗和反应器改造提供了信息,以减少有机物和钙/镁盐造成的污垢。为了评估尿液收集和储存对 ECS 的影响,我们对不同冲洗水稀释程度、二价阳离子沉淀程度和水解程度的尿液进行了实验。在所有条件下,ECS 都能有效处理尿液,但尽量减少冲洗水量并确保尿液储存到完全水解后才能实现高能效的 TAN 回收。我们的实验结果和成本分析促使我们采用多方面的方法来提高 ECS 的技术和经济可行性,即通过材料、反应器和工艺工程来延长组件寿命、降低组件成本和减少能耗。总之,我们证明了尿液处理是电化学从废水中回收营养物质的立足点,同时支持 ECS 适用于其他七种特性差异很大的废水。我们的研究成果将促进电化学养分回收技术的推广和应用,实现循环氮经济,促进卫生服务、高效化学品生产和水资源保护。
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引用次数: 0
Correction to “Investigation of 6PPD-Quinone in Rubberized Asphalt Concrete Mixtures” 对 "橡胶沥青混凝土混合物中 6PPD-Quinone 的调查 "的更正
Q2 Environmental Science Pub Date : 2024-01-12 DOI: 10.1021/acsenvironau.3c00077
Srinidhi Lokesh, Siththarththan Arunthavabalan, Ryan S. Stanton, Alon R. Agua, Michael C. Pirrung, Elie Y. Hajj, Edgard Hitti and Yu Yang*, 
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引用次数: 0
Visible-Light-Driven Mentha spicata L.-Mediated Ag-Doped Bi2Zr2O7 Nanocomposite for Enhanced Degradation of Organic Pollutants, Electrochemical Sensing, and Antibacterial Applications 可见光驱动的薄荷掺银 Bi2Zr2O7 纳米复合材料用于增强有机污染物降解、电化学传感和抗菌应用
Q2 Environmental Science Pub Date : 2024-01-09 DOI: 10.1021/acsenvironau.3c00057
Kurlla Pompapathi, Kurupalya Shivram Anantharaju*, Periyakaruppan Karuppasamy*, Meena Subramaniam, Bogegowda Uma, Surendra Boppanahalli Siddegowda, Arpita Paul Chowdhury and H. C. Ananda Murthy*, 

Novel visible-light-driven Ag (X)-doped Bi2Zr2O7 (BZO) nanocomposites in pudina (P) extract (Mentha spicata L.), X-1, 3, 5, 7, and 9 mol %, were synthesized by the one-pot greener solution combustion method. The as-synthesized nanocomposite materials were characterized by using various spectral [X-ray diffraction (XRD), Fourier transform infrared, UV–visible, UV– diffuse reflectance spectra, X-ray photoelectron spectroscopy], electrochemical (cyclic voltammetry, electrochemical impedance spectroscopy), and analytical (scanning electron microscopy–energy-dispersive X-ray spectroscopy, transmission electron microscopy, Brunauer–Emmett–Teller) techniques. The average particle size of the nanocomposite material was found to be between 14.8 and 39.2 nm by XRD. The well-characterized Ag-doped BZOP nanocomposite materials exhibited enhanced photocatalytic degradation activity toward hazardous dyes such as methylene blue (MB) and rose bengal (RB) under visible light irradiation ranges between 400 and 800 nm due to their low energy band gap. As a result, 7 mol % of Ag-doped BZOP nanocomposite material exhibited excellent photodegradation activity against MB (D.E. = 98.7%) and RB (D.E. = 99.3%) as compared to other Ag-doped BZOP nanocomposite materials and pure BZOP nanocomposite, respectively, due to enhanced semiconducting and optical behaviors, high binding energy, and mechanical and thermal stabilities. The Ag-doped BZOP nanocomposite material-based electrochemical sensor showed good sensing ability toward the determination of lead nitrate and dextrose with the lowest limit of detection (LOD) of 18 μM and 12 μM, respectively. Furthermore, as a result of the initial antibacterial screening study, the Ag-doped BZOP nanocomposite material was found to be more effective against Gram-negative bacteria (Escherichia coli) as compared to Gram-positive (Staphylococcus aureus) bacteria. The scavenger study reveals that radicals such as O2•– and OH are responsible for MB and RB mineralization. TOC removal percentages were found to be 96.8 and 98.5% for MB and RB dyes, and experimental data reveal that the Ag-doped BZOP enhances the radical (O2•– and OH) formation and MB and RB degradation under visible-light irradiation.

采用一锅绿色溶液燃烧法合成了掺杂Ag (X)的新型可见光驱动Bi2Zr2O7 (BZO)纳米复合材料。利用各种光谱(X 射线衍射 (XRD)、傅立叶变换红外光谱、紫外-可见光谱、紫外-漫反射光谱、X 射线光电子能谱)、电化学(循环伏安法、电化学阻抗能谱)和分析(扫描电子显微镜-能量色散 X 射线能谱、透射电子显微镜、Brunauer-Emmett-Teller)技术对合成的纳米复合材料进行了表征。通过 X 射线衍射发现,纳米复合材料的平均粒径介于 14.8 纳米和 39.2 纳米之间。表征良好的掺银 BZOP 纳米复合材料由于能带隙较低,在 400 纳米到 800 纳米的可见光照射范围内,对亚甲蓝(MB)和玫瑰红(RB)等有害染料具有更强的光催化降解活性。因此,与其他掺银 BZOP 纳米复合材料和纯 BZOP 纳米复合材料相比,7 摩尔% 的掺银 BZOP 纳米复合材料对 MB(D.E. = 98.7%)和 RB(D.E. = 99.3%)分别表现出优异的光降解活性,这是由于其增强的半导体和光学行为、高结合能以及机械和热稳定性。掺银的 BZOP 纳米复合材料电化学传感器对硝酸铅和葡萄糖具有良好的传感能力,最低检测限(LOD)分别为 18 μM 和 12 μM。此外,初步抗菌筛选研究发现,与革兰氏阳性菌(金黄色葡萄球菌)相比,掺银 BZOP 纳米复合材料对革兰氏阴性菌(大肠杆菌)更有效。清除剂研究表明,O2-- 和 -OH 等自由基是造成甲基溴和溴化物矿化的原因。实验数据显示,在可见光照射下,掺银的 BZOP 可促进自由基(O2-- 和 -OH)的形成以及甲基溴和溴的降解。
{"title":"Visible-Light-Driven Mentha spicata L.-Mediated Ag-Doped Bi2Zr2O7 Nanocomposite for Enhanced Degradation of Organic Pollutants, Electrochemical Sensing, and Antibacterial Applications","authors":"Kurlla Pompapathi,&nbsp;Kurupalya Shivram Anantharaju*,&nbsp;Periyakaruppan Karuppasamy*,&nbsp;Meena Subramaniam,&nbsp;Bogegowda Uma,&nbsp;Surendra Boppanahalli Siddegowda,&nbsp;Arpita Paul Chowdhury and H. C. Ananda Murthy*,&nbsp;","doi":"10.1021/acsenvironau.3c00057","DOIUrl":"10.1021/acsenvironau.3c00057","url":null,"abstract":"<p >Novel visible-light-driven Ag (<i>X</i>)-doped Bi<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> (BZO) nanocomposites in pudina (P) extract (<i>Mentha spicata</i> L.), <i>X</i>-1, 3, 5, 7, and 9 mol %, were synthesized by the one-pot greener solution combustion method. The as-synthesized nanocomposite materials were characterized by using various spectral [X-ray diffraction (XRD), Fourier transform infrared, UV–visible, UV– diffuse reflectance spectra, X-ray photoelectron spectroscopy], electrochemical (cyclic voltammetry, electrochemical impedance spectroscopy), and analytical (scanning electron microscopy–energy-dispersive X-ray spectroscopy, transmission electron microscopy, Brunauer–Emmett–Teller) techniques. The average particle size of the nanocomposite material was found to be between 14.8 and 39.2 nm by XRD. The well-characterized Ag-doped BZOP nanocomposite materials exhibited enhanced photocatalytic degradation activity toward hazardous dyes such as methylene blue (MB) and rose bengal (RB) under visible light irradiation ranges between 400 and 800 nm due to their low energy band gap. As a result, 7 mol % of Ag-doped BZOP nanocomposite material exhibited excellent photodegradation activity against MB (D.E. = 98.7%) and RB (D.E. = 99.3%) as compared to other Ag-doped BZOP nanocomposite materials and pure BZOP nanocomposite, respectively, due to enhanced semiconducting and optical behaviors, high binding energy, and mechanical and thermal stabilities. The Ag-doped BZOP nanocomposite material-based electrochemical sensor showed good sensing ability toward the determination of lead nitrate and dextrose with the lowest limit of detection (LOD) of 18 μM and 12 μM, respectively. Furthermore, as a result of the initial antibacterial screening study, the Ag-doped BZOP nanocomposite material was found to be more effective against Gram-negative bacteria (<i>Escherichia coli</i>) as compared to Gram-positive (<i>Staphylococcus aureus</i>) bacteria. The scavenger study reveals that radicals such as O<sub>2</sub><sup>•–</sup> and <sup>•</sup>OH are responsible for MB and RB mineralization. TOC removal percentages were found to be 96.8 and 98.5% for MB and RB dyes, and experimental data reveal that the Ag-doped BZOP enhances the radical (O<sub>2</sub><sup>•–</sup> and <sup>•</sup>OH) formation and MB and RB degradation under visible-light irradiation.</p>","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsenvironau.3c00057","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139412987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Self-Cross-Linking of MXene-Intercalated Graphene Oxide Membranes with Antiswelling Properties for Dye and Salt Rejection 自交联的具有抗溶胀特性的 MXene-Intercalated 氧化石墨烯膜可用于染料和盐的阻隔
Q2 Environmental Science Pub Date : 2024-01-08 DOI: 10.1021/acsenvironau.3c00059
Saurabh Kr Tiwary, Maninderjeet Singh, Farzana Hasan Likhi, Siddharaj Dabade, Jack F. Douglas and Alamgir Karim*, 

Membrane-based water purification is poised to play an important role in tackling the potable water crisis for safe and clean water access for the general population. Several studies have focused on near two-dimensional membranes for this purpose, which is based on an ion rejection technique. However, membrane swelling in these materials has emerged as a significant challenge because it leads to the loss of function. Herein, we report a self-cross-linked MXene-intercalated graphene oxide (GO) membrane that retains ion and dye rejection properties because the physical cross-linking interaction between Ti–O–Ti and neighboring nanosheets effectively suppresses the swelling of the membrane. In addition to the associative Ti–O–Ti bonds, C–O–C, O═C–O, and C–OH bonds are also formed, which are important for inhibiting the swelling of the membrane. To ensure the longevity of these membranes in a service context, they were subjected to heat pressurization and subsequent thermal annealing. The membrane subjected to this novel processing history exhibits minimal swelling upon immersion in solutions and retains function, rejecting salt and dyes over a wide range of salt and dye concentrations. Furthermore, these membranes successfully rejected dye and salt over a period of 72 h without a degradation of function, suggesting that these membranes have the requisite durability for water filtration applications.

基于膜的水净化技术将在解决饮用水危机中发挥重要作用,为普通民众提供安全清洁的饮用水。为此,一些研究重点关注基于离子排斥技术的近二维膜。然而,这些材料中的膜膨胀已成为一项重大挑战,因为它会导致功能丧失。在此,我们报告了一种自交联的 MXene 互结氧化石墨烯(GO)膜,由于 Ti-O-Ti 与相邻纳米片之间的物理交联作用有效抑制了膜的膨胀,因此该膜仍具有离子和染料阻隔特性。除了 Ti-O-Ti 联接键外,还形成了 C-O-C、O═C-O 和 C-OH 键,这些键对抑制膜的膨胀非常重要。为了确保这些膜在使用环境中的使用寿命,对它们进行了热压和随后的热退火处理。在溶液中浸泡后,经过这种新型加工工艺处理的膜膨胀极小,并能保持功能,在盐和染料浓度范围很宽的情况下都能析出盐和染料。此外,这些膜在 72 小时内成功地析出了染料和盐,而功能没有退化,这表明这些膜具有水过滤应用所需的耐久性。
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引用次数: 0
Activated Carbon Electrodes for Supercapacitors from Purple Corncob (Zea mays L.) 从紫色玉米芯(玉米)中提取用于超级电容器的活性炭电极
Q2 Environmental Science Pub Date : 2024-01-05 DOI: 10.1021/acsenvironau.3c00048
Emily Huarote-Garcia, Andy A. Cardenas-Riojas, Ivonne E. Monje, Elvis O. López, Ofelia M. Arias-Pinedo, Gabriel A. Planes and Angélica M. Baena-Moncada*, 

Activated carbon-based supercapacitor electrodes synthesized from biomass or waste-derived biomass have recently attracted considerable attention because of their low cost, natural abundance, and power delivery performance. In this work, purple-corncob-based active carbons are prepared by KOH activation and subsequently evaluated as a composite electrode for supercapacitors using either an acidic or an alkali solution as the electrolyte. The synthesis of the material involves mixing the purple corncob powder with different concentrations of KOH (in the range of 5% to 30%) and a thermal treatment at 700 °C under an inert atmosphere. Physicochemical characterizations were performed using scanning electron microscopy, Raman spectroscopy, N2 physisorption analysis, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy, while the electrochemical characteristics were determined using cyclic voltammetry, a galvanostatic charge/discharge curve, and electrochemical impedance techniques measured in a three- and two-electrode system. Composite electrodes activated with 10% KOH had a specific surface area of 728 m2 g–1, and high capacitances of 195 F g–1 at 0.5 A g–1 in 1 mol L–1 H2SO4 and 116 F g–1 at 0.5 A g–1 in 1 mol L–1 KOH were obtained. It also presented a 76% capacitance retention after 50 000 cycles. These properties depend significantly on the microporous area and micropore volume characteristics of the activated carbon. Overall, our results indicate that purple corncob has an interesting prospect as a carbon precursor material for supercapacitor electrodes.

以生物质或废弃生物质为原料合成的活性碳基超级电容器电极因其成本低、天然丰富、功率传输性能好等优点,最近引起了广泛关注。在这项研究中,通过 KOH 活化法制备了基于紫色角豆的活性碳,随后对其作为超级电容器的复合电极进行了评估,该电极使用酸性或碱性溶液作为电解质。该材料的合成过程包括将紫色玉米芯粉末与不同浓度的 KOH(5% 至 30%)混合,然后在惰性气氛下于 700 °C 进行热处理。使用扫描电子显微镜、拉曼光谱、N2 物理吸附分析、傅立叶变换红外光谱和 X 射线光电子能谱确定了材料的物理化学特性,并在三电极和双电极系统中使用循环伏安法、电流静态充放电曲线和电化学阻抗技术测定了材料的电化学特性。用 10% KOH 活化的复合电极的比表面积为 728 m2 g-1,在 1 mol L-1 H2SO4 溶液中 0.5 A g-1 时的电容为 195 F g-1,在 1 mol L-1 KOH 溶液中 0.5 A g-1 时的电容为 116 F g-1。此外,在 50 000 次循环后,电容保持率为 76%。这些特性在很大程度上取决于活性炭的微孔面积和微孔体积特性。总之,我们的研究结果表明,紫色玉米芯作为超级电容器电极的碳前驱体材料具有令人感兴趣的前景。
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引用次数: 0
Materials Science Toolkit for Carbon Footprint Assessment: A Case Study for Endoscopic Accessories of Common Use 碳足迹评估材料科学工具包:内窥镜常用配件案例研究
Q2 Environmental Science Pub Date : 2023-12-29 DOI: 10.1021/acsenvironau.3c00044
Rubén Martín-Cabezuelo*, Guillermo Vilariño-Feltrer, Alberto J. Campillo-Fernández*, Vicente Lorenzo-Zúñiga, Vicente Pons, Pedro López-Muñoz and Isabel Tort-Ausina, 

Ironically, healthcare systems are key agents in respiratory-related diseases and estimated deaths because of the high impact of their greenhouse gas emissions, along with industry, transportation, and housing. Based on safety requirements, hospitals and related services use an extensive number of consumables, most of which end up incinerated at the end of their life cycle. A thorough assessment of the carbon footprint of such devices typically requires knowing precise information about the manufacturing process, which is rarely available in detail because of the many materials, pieces, and steps involved during the fabrication. Yet, the tools most often used for determining the environmental impact of consumer goods require a bunch of parameters, mainly based on the material composition of the device. Here, we report a basic set of analytical methods that provide the information required by the software OpenLCA to calculate the main outcome related to environmental impact, greenhouse gas emissions. Through thermogravimetry, calorimetry, infrared spectroscopy, and elemental analysis, we proved that obtaining relevant data for the calculator in the exemplifying case of endoscopy tooling or accessories is possible. This routine procedure opens the door to a broader, more accurate analysis of the environmental impact of everyday work at hospital services, offering potential alternatives to minimize it.

具有讽刺意味的是,医疗保健系统与工业、交通和住房一样,因其温室气体排放量大而成为呼吸系统相关疾病和估计死亡人数的关键因素。基于安全要求,医院和相关服务机构使用大量消耗品,其中大部分在生命周期结束后被焚烧。要彻底评估这些设备的碳足迹,通常需要了解制造过程的精确信息,但由于制造过程涉及许多材料、部件和步骤,因此很少有详细的信息。然而,最常用于确定消费品对环境影响的工具需要一系列参数,这些参数主要基于设备的材料成分。在此,我们报告了一套基本的分析方法,这些方法提供了 OpenLCA 软件计算与环境影响相关的主要结果(温室气体排放)所需的信息。通过热重法、量热法、红外光谱法和元素分析法,我们证明了在内窥镜工具或配件的示例中为计算器获取相关数据是可能的。这一例行程序为更广泛、更准确地分析医院服务日常工作对环境的影响打开了大门,为最大限度地减少环境影响提供了潜在的替代方案。
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引用次数: 0
Differences in Dissolved Organic Matter Molecular Composition along Two Plume Trajectories from the Yangtze River Estuary to the East China Sea 长江口至东海两条羽流轨迹上溶解有机物分子组成的差异
Q2 Environmental Science Pub Date : 2023-12-06 DOI: 10.1021/acsenvironau.3c00030
Zhao Liang Chen, Yuanbi Yi*, Haibo Zhang, Penghui Li, Yuntao Wang, Zhenwei Yan, Kai Wang, Chen He, Quan Shi and Ding He*, 

Analyzing the molecular composition change of dissolved organic matter (DOM) during transportation in estuaries can enhance our understanding of the fate of DOM. However, the impact of hydrologic conditions resulting from large river plumes on the DOM cycle are less explored, and previous studies were insufficient to capture the molecular fate that occur during the transportation process. In this study, we used a range of bulk and optical techniques, as well as Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS), to determine the concentration and characteristics of DOM along two trajectories of downstream plumes of diluted water of the Yangtze (Changjiang) River estuary (YRE) during the high discharge season. These two plumes situated along the route of the summer Changjiang diluted water (CDW) have been identified and named CDW-North (CDW-N) and CDW-South (CDW-S), respectively. Despite having the same riverine end-member origin, the turbidity zone in YRE significantly modifies the molecular characteristics and composition of DOM. The results of FT-ICR MS indicated a spatial variation of DOM composition in the coastal zone of the two plumes. The relative intensities of the CHO, CHOS, and CHONS compounds are negatively correlated with salinity. In addition, the coastal zones of both CDW-N and CDW-S are characterized by more autochthonous DOM sources. More CHON compounds in CDW-N are probably due to the production of autochthonous DOM in offshore waters. The activity of phytoplankton increased the surface dissolved oxygen level of CDW-N in the coastal zone. However, the hypoxic zone formed at the bottom of the CDW-N due to microbial degradation of organic matter and may further benefit the preservation of CHON compounds. Our study emphasizes that the characteristics and composition of the estuarine DOM can be significantly shaped by distinct large river plumes. Furthermore, using FT-ICR MS in combination with complementary techniques can better assist in identifying the sources and transformation mechanisms of estuarine DOM in large river plume-affected systems and provide more valuable insights into the role of DOM in the estuarine biogeochemical cycle.

分析溶解有机物(DOM)在河口运输过程中的分子组成变化,可以加深我们对溶解有机物归宿的了解。然而,大型河流羽流造成的水文条件对溶解有机物循环的影响却鲜有研究,以往的研究也不足以捕捉运输过程中发生的分子归宿。在本研究中,我们采用了一系列散射和光学技术以及傅立叶变换离子回旋共振质谱法(FT-ICR MS),测定了高排放季节长江口稀释水下游羽流的两条轨迹上 DOM 的浓度和特征。这两个羽流位于夏季长江稀释水(CDW)沿线,分别被命名为长江稀释水-北(CDW-N)和长江稀释水-南(CDW-S)。尽管具有相同的河流末端成员来源,但 YRE 的浊度区显著改变了 DOM 的分子特征和组成。FT-ICR MS 的结果表明,两个羽流沿岸地区的 DOM 组成存在空间差异。CHO、CHOS 和 CHONS 化合物的相对强度与盐度呈负相关。此外,CDW-N 和 CDW-S 的沿岸带都有较多的自生 DOM 来源。CDW-N 中更多的 CHON 化合物可能是由于近海水域产生了自生 DOM。浮游植物的活动提高了沿岸带 CDW-N 的表层溶解氧水平。然而,由于微生物降解有机物,CDW-N 底部形成了缺氧区,这可能进一步有利于 CHON 化合物的保存。我们的研究强调,河口 DOM 的特征和组成可由不同的大型河流羽流显著影响。此外,将 FT-ICR MS 与辅助技术相结合,可以更好地帮助确定受大河羽流影响系统中河口 DOM 的来源和转化机制,并为了解 DOM 在河口生物地球化学循环中的作用提供更有价值的见解。
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引用次数: 0
Hierarchical Porous Bimetallic FeMn Metal–Organic Framework Gel for Efficient Activation of Peracetic Acid in Antibiotic Degradation 在抗生素降解过程中高效活化过乙酸的分层多孔双金属铁锰金属有机框架凝胶
Q2 Environmental Science Pub Date : 2023-12-05 DOI: 10.1021/acsenvironau.3c00041
Lu Zheng, Jiarui Fu, Baolv Hua, Yi-nan Wu, Yifan Gu, Nianqiao Qin and Fengting Li*, 

Effective techniques for eliminating antibiotics from water environments are in high demand. The peracetic acid (PAA)-based advanced oxidation process has recently drawn increasing attention for its effective antibiotic degrading capability. However, current applications of PAA-based techniques are limited and tend to have unsatisfactory performance. An additional catalyst for PAA activation could provide a promising solution to improve the performance of PAA. Bulky metal–organic framework gels (MOGs) stand out as ideal catalysts for PAA activation owing to their multiple advantages, including large surface areas, high porosity, and hierarchical pore systems. Herein, a bimetallic hierarchical porous structure, i.e., FeMn13BTC, was synthesized through a facile one-pot synthesis method and employed for PAA activation in ofloxacin (OFX) degradation. The optimized FeMn MOG/PAA system exhibited efficient catalytic performance, characterized by 81.85% OFX degradation achieved within 1 h owing to the specific hierarchical structure and synergistic effect between Fe and Mn ions, which greatly exceeded the performance of the only PAA-catalyzed system. Furthermore, the FeMn MOG/PAA system maintained >80% OFX degradation in natural water. Quenching experiments, electron spin resonance spectra, and model molecular degradation revealed that the primary reactive oxygen species responsible for the catalytic effect was R–O, especially CH3C(═O)OO, with minor contributions of OH and 1O2. Overall, introduction of the MOG catalyst strategy for PAA activation achieved high antibiotic degradation performance, establishing a paradigm for the design of heterogeneous hierarchical systems to broaden the scope of catalyzed water treatment applications.

消除水环境中抗生素的有效技术需求量很大。最近,基于过乙酸(PAA)的高级氧化工艺因其有效的抗生素降解能力而受到越来越多的关注。然而,目前基于 PAA 的技术应用有限,性能往往不尽如人意。为 PAA 的活化添加催化剂可为改善 PAA 的性能提供一种前景广阔的解决方案。大块金属有机框架凝胶(MOGs)具有大表面积、高孔隙率和分层孔隙体系等多种优点,是 PAA 活化的理想催化剂。本文通过简单的一锅合成法合成了一种双金属分层多孔结构,即 FeMn13BTC,并将其用于氧氟沙星(OFX)降解过程中的 PAA 活化。优化后的 FeMn MOG/PAA 体系表现出高效的催化性能,由于其特殊的分层结构以及铁离子和锰离子之间的协同效应,在 1 h 内实现了 81.85% 的 OFX 降解,大大超过了仅有的 PAA 催化体系。此外,FeMn MOG/PAA 系统还能在天然水中保持 80% 的 OFX 降解率。淬灭实验、电子自旋共振光谱和模型分子降解显示,产生催化效果的主要活性氧是 R-O-,尤其是 CH3C(═O)OO-,其次是 -OH 和 1O2。总之,采用 MOG 催化剂活化 PAA 的策略实现了较高的抗生素降解性能,为设计异构分层体系建立了范例,从而拓宽了催化水处理的应用范围。
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引用次数: 0
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