Spread of antibiotic resistance genes (ARGs) by conjugation poses great challenges to public health. Application of pyroligneous acids (PA) as soil amendments has been evidenced as a practical strategy to remediate pollution of ARGs in soils. However, little is known about PA effects on horizontal gene transfer (HGT) of ARGs by conjugation. This study investigated the effects of a woody waste-derived PA prepared at 450°C and its three distillation components (F1, F2, and F3) at different temperatures (98, 130, and 220°C) on conjugative transfer of plasmid RP4 within Escherichia coli. PA at relatively high amount (40–100 μL) in a 30-mL mating system inhibited conjugation by 74–85%, following an order of PA > F3 ≈ F2 ≈ F1, proving the hypothesis that PA amendments may mitigate soil ARG pollution by inhibiting HGT. The bacteriostasis caused by antibacterial components of PA, including acids, phenols, and alcohols, as well as its acidity (pH 2.81) contributed to the inhibited conjugation. However, a relatively low amount (10–20 μL) of PA in the same mating system enhanced ARG transfer by 26–47%, following an order of PA > F3 ≈ F2 > F1. The opposite effect at low amount is mainly attributed to the increased intracellular reactive oxygen species production, enhanced cell membrane permeability, increased extracellular polymeric substance contents, and reduced cell surface charge. Our findings highlight the hormesis (low-amount promotion and high-amount inhibition) of PA amendments on ARG conjugation and provide evidence for selecting an appropriate amount of PA amendment to control the dissemination of soil ARGs. Moreover, the promoted conjugation also triggers questions regarding the potential risks of soil amendments (e.g., PA) in the spread of ARGs via HGT.
{"title":"Hormetic Effect of Pyroligneous Acids on Conjugative Transfer of Plasmid-mediated Multi-antibiotic Resistance Genes within Bacterial Genus","authors":"Mengying Shao, Liuqingqing Liu, Bingjie Liu, Hao Zheng*, Wei Meng, Yifan Liu, Xiao Zhang, Xiaohan Ma, Cuizhu Sun, Xianxiang Luo, Fengmin Li and Baoshan Xing*, ","doi":"10.1021/acsenvironau.2c00056","DOIUrl":"10.1021/acsenvironau.2c00056","url":null,"abstract":"<p >Spread of antibiotic resistance genes (ARGs) by conjugation poses great challenges to public health. Application of pyroligneous acids (PA) as soil amendments has been evidenced as a practical strategy to remediate pollution of ARGs in soils. However, little is known about PA effects on horizontal gene transfer (HGT) of ARGs by conjugation. This study investigated the effects of a woody waste-derived PA prepared at 450°C and its three distillation components (F1, F2, and F3) at different temperatures (98, 130, and 220°C) on conjugative transfer of plasmid RP4 within <i>Escherichia coli</i>. PA at relatively high amount (40–100 μL) in a 30-mL mating system inhibited conjugation by 74–85%, following an order of PA > F3 ≈ F2 ≈ F1, proving the hypothesis that PA amendments may mitigate soil ARG pollution by inhibiting HGT. The bacteriostasis caused by antibacterial components of PA, including acids, phenols, and alcohols, as well as its acidity (pH 2.81) contributed to the inhibited conjugation. However, a relatively low amount (10–20 μL) of PA in the same mating system enhanced ARG transfer by 26–47%, following an order of PA > F3 ≈ F2 > F1. The opposite effect at low amount is mainly attributed to the increased intracellular reactive oxygen species production, enhanced cell membrane permeability, increased extracellular polymeric substance contents, and reduced cell surface charge. Our findings highlight the hormesis (low-amount promotion and high-amount inhibition) of PA amendments on ARG conjugation and provide evidence for selecting an appropriate amount of PA amendment to control the dissemination of soil ARGs. Moreover, the promoted conjugation also triggers questions regarding the potential risks of soil amendments (e.g., PA) in the spread of ARGs via HGT.</p>","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsenvironau.2c00056","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9349776","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}
Pub Date : 2022-12-05DOI: 10.1021/acsenvironau.2c00041
Zhichao Chen, Tara I. Yacovitch, Conner Daube, Scott C. Herndon, Darcy Wilson, Stacie Enoch and David T. Allen*,
Comparisons of observation-based emission estimates with emission inventories for oil and gas production operations have demonstrated that intermittency in emissions is an important factor to be accounted for in reconciling inventories with observations. Most emission inventories do not directly report data on durations of active emissions, and the variability in emissions over time must be inferred from other measurements or engineering calculations. This work examines a unique emission inventory, assembled for offshore oil and gas production platforms in federal waters of the Outer Continental Shelf (OCS) of the United States, which reports production-related sources on individual platforms, along with estimates of emission duration for individual sources. Platform specific emission rates, derived from the inventory, were compared to shipboard measurements made at 72 platforms. The reconciliation demonstrates that emission duration reporting, by source, can lead to predicted ranges in emissions that are much broader than those based on annual average emission rates. For platforms in federal waters, total emissions reported in the inventory for the matched platforms were within ∼10% of emissions estimated based on observations, depending on emission rates assumed for nondetects in the observational data set. The distributions of emissions were similar, with 75% of platform total emission rates falling between 0 and 49 kg/h for the observations and between 0.59 and 54 kg/h for the inventory.
{"title":"Reconciling Methane Emission Measurements for Offshore Oil and Gas Platforms with Detailed Emission Inventories: Accounting for Emission Intermittency","authors":"Zhichao Chen, Tara I. Yacovitch, Conner Daube, Scott C. Herndon, Darcy Wilson, Stacie Enoch and David T. Allen*, ","doi":"10.1021/acsenvironau.2c00041","DOIUrl":"10.1021/acsenvironau.2c00041","url":null,"abstract":"<p >Comparisons of observation-based emission estimates with emission inventories for oil and gas production operations have demonstrated that intermittency in emissions is an important factor to be accounted for in reconciling inventories with observations. Most emission inventories do not directly report data on durations of active emissions, and the variability in emissions over time must be inferred from other measurements or engineering calculations. This work examines a unique emission inventory, assembled for offshore oil and gas production platforms in federal waters of the Outer Continental Shelf (OCS) of the United States, which reports production-related sources on individual platforms, along with estimates of emission duration for individual sources. Platform specific emission rates, derived from the inventory, were compared to shipboard measurements made at 72 platforms. The reconciliation demonstrates that emission duration reporting, by source, can lead to predicted ranges in emissions that are much broader than those based on annual average emission rates. For platforms in federal waters, total emissions reported in the inventory for the matched platforms were within ∼10% of emissions estimated based on observations, depending on emission rates assumed for nondetects in the observational data set. The distributions of emissions were similar, with 75% of platform total emission rates falling between 0 and 49 kg/h for the observations and between 0.59 and 54 kg/h for the inventory.</p>","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/76/69/vg2c00041.PMC10125359.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9356513","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}
Pub Date : 2022-11-29DOI: 10.1021/acsenvironau.2c00035
Abhishek Chaudhary*, and , Amaan Akhtar,
A massive amount of building construction is expected in economically developing nations such as India over the next few years. The first step in ensuring that the new construction takes place in a sustainable manner is the knowledge about the building’s impact on multiple environmental domains. Life cycle assessment (LCA) is a promising tool for this, but its application in the Indian construction sector is hampered by a lack of access to detailed inventory data on amounts of all building materials used and the per unit environmental footprints of individual materials (characterization factors). Here, we overcome these limitations by proposing a novel approach that connects the building bill of quantity data with publicly available analysis of rate documents to obtain the detailed material inventory. The approach then combines the material inventory data with the newly available India-specific environmental footprint database of construction materials to calculate the impacts of a building during its different life cycle stages (cradle to site). We demonstrate the new approach through a case study of a residential building within a hospital in North-East India and quantify its environmental footprint on six domains of the environment: energy use, global warming, ozone depletion, acidification, eutrophication, and photochemical oxidant formation potential. Results show that out of 78 materials used, bricks, aluminum sections, steel bars, and cement are the major contributors to the building’s total environmental impact. The material manufacturing stage is the hotspot in the building’s life cycle. Our approach can act as a template for conducting “cradle-to-site” LCA of buildings for which BOQ data becomes available in India and other countries in the future.
{"title":"Template for Evaluating Cradle-to-Site Environmental Life Cycle Impacts of Buildings in India","authors":"Abhishek Chaudhary*, and , Amaan Akhtar, ","doi":"10.1021/acsenvironau.2c00035","DOIUrl":"10.1021/acsenvironau.2c00035","url":null,"abstract":"A massive amount of building construction is expected in economically developing nations such as India over the next few years. The first step in ensuring that the new construction takes place in a sustainable manner is the knowledge about the building’s impact on multiple environmental domains. Life cycle assessment (LCA) is a promising tool for this, but its application in the Indian construction sector is hampered by a lack of access to detailed inventory data on amounts of all building materials used and the per unit environmental footprints of individual materials (characterization factors). Here, we overcome these limitations by proposing a novel approach that connects the building bill of quantity data with publicly available analysis of rate documents to obtain the detailed material inventory. The approach then combines the material inventory data with the newly available India-specific environmental footprint database of construction materials to calculate the impacts of a building during its different life cycle stages (cradle to site). We demonstrate the new approach through a case study of a residential building within a hospital in North-East India and quantify its environmental footprint on six domains of the environment: energy use, global warming, ozone depletion, acidification, eutrophication, and photochemical oxidant formation potential. Results show that out of 78 materials used, bricks, aluminum sections, steel bars, and cement are the major contributors to the building’s total environmental impact. The material manufacturing stage is the hotspot in the building’s life cycle. Our approach can act as a template for conducting “cradle-to-site” LCA of buildings for which BOQ data becomes available in India and other countries in the future.","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/fd/49/vg2c00035.PMC10125340.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9349781","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}
Pub Date : 2022-11-16DOI: 10.1021/acsenvironau.2c00065
Yi Jiang*, and , Xiangdong Li*,
T year marks the 30th anniversary of Sustainable Development being institutionalized at the United Nations Conference on Environment and Development (also commonly called the Rio de Janeiro “Earth Summit”) in 1992. The adoption of the 2030 Agenda for Sustainable Development in 2015 further laid out a concrete plan to achieve the 17 interlinked Sustainable Development Goals (SDGs) by 2030. These SDGs include poverty alleviation, clean water, human health, climate change, and sustainable energy, and are collectively regarded as “a shared blueprint for peace and prosperity for people and the planet, now and into the future.” Sustainability is gradually being integrated into every aspect of our society. A recent example is the emergence of environmental, social, and governance (ESG), which is now impacting the operation of major corporations worldwide. Yet, despite recent advances, we cannot ignore the fact that massive efforts are required to meet the SDGs by 2030. For instance, among many striking statistics is the fact that the proportion of the global population using safely managed drinking water services only increased from 70 to 74% between 2015 and 2020. The rate of progress would need to grow 4-fold to reach universal coverage by 2030. Now more than ever, we require concerted efforts on financing, technology dissemination, capacity building, and international collaboration. Science and innovation play a pivotal role in facilitating advances, and open access to key research results accelerates our progress. In this issue of ACS Environmental Au, we are pleased to present a collection of six publications that contribute to advancing our progress toward some of the key SDGs. We have categorized them based on the SDG that each publication is most relevant to.
{"title":"Sustainable Development: 30 Years Since the Rio de Janeiro Earth Summit","authors":"Yi Jiang*, and , Xiangdong Li*, ","doi":"10.1021/acsenvironau.2c00065","DOIUrl":"10.1021/acsenvironau.2c00065","url":null,"abstract":"T year marks the 30th anniversary of Sustainable Development being institutionalized at the United Nations Conference on Environment and Development (also commonly called the Rio de Janeiro “Earth Summit”) in 1992. The adoption of the 2030 Agenda for Sustainable Development in 2015 further laid out a concrete plan to achieve the 17 interlinked Sustainable Development Goals (SDGs) by 2030. These SDGs include poverty alleviation, clean water, human health, climate change, and sustainable energy, and are collectively regarded as “a shared blueprint for peace and prosperity for people and the planet, now and into the future.” Sustainability is gradually being integrated into every aspect of our society. A recent example is the emergence of environmental, social, and governance (ESG), which is now impacting the operation of major corporations worldwide. Yet, despite recent advances, we cannot ignore the fact that massive efforts are required to meet the SDGs by 2030. For instance, among many striking statistics is the fact that the proportion of the global population using safely managed drinking water services only increased from 70 to 74% between 2015 and 2020. The rate of progress would need to grow 4-fold to reach universal coverage by 2030. Now more than ever, we require concerted efforts on financing, technology dissemination, capacity building, and international collaboration. Science and innovation play a pivotal role in facilitating advances, and open access to key research results accelerates our progress. In this issue of ACS Environmental Au, we are pleased to present a collection of six publications that contribute to advancing our progress toward some of the key SDGs. We have categorized them based on the SDG that each publication is most relevant to.","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/89/9c/vg2c00065.PMC10114617.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9361905","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}
Pub Date : 2022-10-24DOI: 10.1021/acsenvironau.2c00047
Saduni S. Arachchi, Stephanie P. Palma, Charlotte I. Sanders, Hui Xu, Rajshree Ghosh Biswas, Ronald Soong, André J. Simpson and Leah B. Casabianca*,
Elucidating the interactions between plastic nanoparticles and small molecules is important to understanding these interactions as they occur in polluted waterways. For example, plastic that breaks down into micro- and nanoscale particles will interact with small molecule pollutants that are also present in contaminated waters. Other components of natural water, such as dissolved organic matter, will also influence these interactions. Here we use a collection of complementary NMR techniques to examine the binding between polystyrene nanoparticles and three common antibiotics, belonging to a class of molecules that are expected to be common in polluted water. Through examination of proton NMR signal intensity, relaxation times, saturation-transfer difference (STD) NMR, and competition STD-NMR, we find that the antibiotics have binding strengths in the order amoxicillin < metronidazole ≪ levofloxacin. Levofloxacin is able to compete for binding sites, preventing the other two antibiotics from binding. The presence of tannic acid disrupts the binding between levofloxacin and the polystyrene nanoparticles, but does not influence the binding between metronidazole and these nanoparticles.
{"title":"Binding Between Antibiotics and Polystyrene Nanoparticles Examined by NMR","authors":"Saduni S. Arachchi, Stephanie P. Palma, Charlotte I. Sanders, Hui Xu, Rajshree Ghosh Biswas, Ronald Soong, André J. Simpson and Leah B. Casabianca*, ","doi":"10.1021/acsenvironau.2c00047","DOIUrl":"10.1021/acsenvironau.2c00047","url":null,"abstract":"<p >Elucidating the interactions between plastic nanoparticles and small molecules is important to understanding these interactions as they occur in polluted waterways. For example, plastic that breaks down into micro- and nanoscale particles will interact with small molecule pollutants that are also present in contaminated waters. Other components of natural water, such as dissolved organic matter, will also influence these interactions. Here we use a collection of complementary NMR techniques to examine the binding between polystyrene nanoparticles and three common antibiotics, belonging to a class of molecules that are expected to be common in polluted water. Through examination of proton NMR signal intensity, relaxation times, saturation-transfer difference (STD) NMR, and competition STD-NMR, we find that the antibiotics have binding strengths in the order amoxicillin < metronidazole ≪ levofloxacin. Levofloxacin is able to compete for binding sites, preventing the other two antibiotics from binding. The presence of tannic acid disrupts the binding between levofloxacin and the polystyrene nanoparticles, but does not influence the binding between metronidazole and these nanoparticles.</p>","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/31/23/vg2c00047.PMC9856636.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9166789","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}
Pub Date : 2022-10-13DOI: 10.1021/acsenvironau.2c00048
Pengfei Liu, Chaoyang Xue, Can Ye, Chengtang Liu, Chenglong Zhang, Jinhe Wang, Yuanyuan Zhang, Junfeng Liu and Yujing Mu*,
Recently, deteriorating ozone (O3) pollution in China brought the precise diagnosis of O3 sensitive chemistry to the forefront. As a dominant precursor of OH radicals, atmospheric nitrous acid (HONO) plays an important role in O3 production. However, its measurement unavailability in many regions especially for second- and third-tier cities may lead to the misjudgment of the O3 sensitivity regime derived from observation-based models. Here, we systematically assess the potential impact of HONO on diagnosing the sensitivity of O3 production using a 0-dimension box model based on a comprehensive summer urban field campaign. The results indicated that the default mode (only the NO + OH reaction is included) in the model could underestimate ∼87% of observed HONO levels, leading to an obvious decrease (∼19%) of net O3 production in the morning, which was in line with the previous studies. The unconstrained HONO in the model was found to significantly push O3 production toward the VOC-sensitive regime. Additionally, it is unrealistic to change NOx but constrain HONO in the model due to the dependence of HONO formation on NOx. Assuming that HONO varied proportionally with NOx, a stronger NOx-sensitive condition could be achieved. Therefore, effective reduction of NOx should be given more attention together with VOC emission control for O3 mitigation.
{"title":"The Lack of HONO Measurement May Affect the Accurate Diagnosis of Ozone Production Sensitivity","authors":"Pengfei Liu, Chaoyang Xue, Can Ye, Chengtang Liu, Chenglong Zhang, Jinhe Wang, Yuanyuan Zhang, Junfeng Liu and Yujing Mu*, ","doi":"10.1021/acsenvironau.2c00048","DOIUrl":"10.1021/acsenvironau.2c00048","url":null,"abstract":"<p >Recently, deteriorating ozone (O<sub>3</sub>) pollution in China brought the precise diagnosis of O<sub>3</sub> sensitive chemistry to the forefront. As a dominant precursor of OH radicals, atmospheric nitrous acid (HONO) plays an important role in O<sub>3</sub> production. However, its measurement unavailability in many regions especially for second- and third-tier cities may lead to the misjudgment of the O<sub>3</sub> sensitivity regime derived from observation-based models. Here, we systematically assess the potential impact of HONO on diagnosing the sensitivity of O<sub>3</sub> production using a 0-dimension box model based on a comprehensive summer urban field campaign. The results indicated that the default mode (only the NO + OH reaction is included) in the model could underestimate ∼87% of observed HONO levels, leading to an obvious decrease (∼19%) of net O<sub>3</sub> production in the morning, which was in line with the previous studies. The unconstrained HONO in the model was found to significantly push O<sub>3</sub> production toward the VOC-sensitive regime. Additionally, it is unrealistic to change NO<sub><i>x</i></sub> but constrain HONO in the model due to the dependence of HONO formation on NO<sub><i>x</i></sub>. Assuming that HONO varied proportionally with NO<sub><i>x</i></sub>, a stronger NO<sub><i>x</i></sub>-sensitive condition could be achieved. Therefore, effective reduction of NO<sub><i>x</i></sub> should be given more attention together with VOC emission control for O<sub>3</sub> mitigation.</p>","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/b5/c1/vg2c00048.PMC10125324.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9413791","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}
Pub Date : 2022-09-28DOI: 10.1021/acsenvironau.2c00037
James Conrad Pritchard, Kathleen Mills Hawkins, Yeo-Myoung Cho, Stephanie Spahr, Scott D. Struck, Christopher P. Higgins and Richard G. Luthy*,
Urban stormwater runoff is a significant driver of surface water quality impairment. Recently, attention has been drawn to potential beneficial use of urban stormwater runoff, including augmenting drinking water supply in water-stressed areas. However, beneficial use relies on improved treatment of stormwater runoff to remove mobile dissolved metals and trace organic contaminants (TrOCs). This study assesses six engineered media mixtures consisting of sand, zeolite, high-temperature gasification biochar, and regenerated activated carbon (RAC) for removing a suite of co-contaminants comprising five metals, three herbicides, four pesticides, a corrosion inhibitor, six per- and polyfluoroalkyl substances (PFASs), five polychlorinated biphenyls (PCBs), and six polycyclic aromatic hydrocarbons (PAHs). This long-term laboratory-scale column study uses a novel approach to generate reproducible synthetic stormwater that incorporates catch basin material and straw-derived dissolved organic carbon. Higher flow conditions (20 cm hr–1), larger sized media (0.42–1.68 mm), and downflow configuration with outlet control increase the relevance of this study to better enable implementation in the field. Biochar- and RAC-amended engineered media filters removed nearly all of the TrOCs in the effluent over the course of three months of continuous flow (480 empty bed volumes), while sample ports spaced at 25% and 50% along the column depth provide windows to observe contaminant transport. Biochar provided greater benefit to TrOC removal than RAC on a mass basis. This study used relatively high concentrations of contaminants and low biochar and RAC content to observe contaminant transport. Performance in the field is likely to be significantly better with higher biochar- and RAC-content filters and lower ambient stormwater contaminant concentrations. This study provides proof-of-concept for biochar- and RAC-amended engineered media filters operated at a flow rate of 20 cm hr–1 for removing dissolved TrOCs and metals and offers insights on the performance of biochar and RAC for improved stormwater treatment and field trials.
城市雨水径流是地表水水质受损的重要驱动因素。最近,人们开始关注城市雨水径流的潜在有益利用,包括增加缺水地区的饮用水供应。然而,有益的用途依赖于改善雨水径流的处理,以去除可移动的溶解金属和微量有机污染物(TrOC)。本研究评估了由沙子、沸石、高温气化生物炭和再生活性炭(RAC)组成的六种工程介质混合物,用于去除一系列共污染物,包括五种金属、三种除草剂、四种杀虫剂、一种缓蚀剂、六种全氟烷基和多氟烷基物质(PFAS)、五种多氯联苯,以及六种多环芳烃。这项长期实验室规模的柱状研究使用了一种新的方法来产生可再生的合成雨水,该方法结合了集水池材料和秸秆衍生的溶解有机碳。更高的流量条件(20 cm hr–1)、更大尺寸的介质(0.42–1.68 mm)以及带有出口控制的下流配置增加了本研究的相关性,从而更好地在现场实施。生物炭和RAC改良的工程介质过滤器在三个月的连续流动过程中(480个空床体积)去除了流出物中几乎所有的TrOC,而沿柱深度间隔25%和50%的样品端口提供了观察污染物迁移的窗口。在质量基础上,生物炭比RAC对去除TrOC提供了更大的益处。这项研究使用相对较高浓度的污染物和较低的生物炭和RAC含量来观察污染物的迁移。生物炭和RAC含量越高,环境雨水污染物浓度越低,现场性能可能会明显更好。本研究为以20 cm hr-1的流速运行的生物炭和RAC改良工程介质过滤器提供了概念验证,用于去除溶解的TrOC和金属,并深入了解了生物炭和可再生能源委员会在改善雨水处理和现场试验方面的性能。
{"title":"Black Carbon-Amended Engineered Media Filters for Improved Treatment of Stormwater Runoff","authors":"James Conrad Pritchard, Kathleen Mills Hawkins, Yeo-Myoung Cho, Stephanie Spahr, Scott D. Struck, Christopher P. Higgins and Richard G. Luthy*, ","doi":"10.1021/acsenvironau.2c00037","DOIUrl":"10.1021/acsenvironau.2c00037","url":null,"abstract":"<p >Urban stormwater runoff is a significant driver of surface water quality impairment. Recently, attention has been drawn to potential beneficial use of urban stormwater runoff, including augmenting drinking water supply in water-stressed areas. However, beneficial use relies on improved treatment of stormwater runoff to remove mobile dissolved metals and trace organic contaminants (TrOCs). This study assesses six engineered media mixtures consisting of sand, zeolite, high-temperature gasification biochar, and regenerated activated carbon (RAC) for removing a suite of co-contaminants comprising five metals, three herbicides, four pesticides, a corrosion inhibitor, six per- and polyfluoroalkyl substances (PFASs), five polychlorinated biphenyls (PCBs), and six polycyclic aromatic hydrocarbons (PAHs). This long-term laboratory-scale column study uses a novel approach to generate reproducible synthetic stormwater that incorporates catch basin material and straw-derived dissolved organic carbon. Higher flow conditions (20 cm hr<sup>–1</sup>), larger sized media (0.42–1.68 mm), and downflow configuration with outlet control increase the relevance of this study to better enable implementation in the field. Biochar- and RAC-amended engineered media filters removed nearly all of the TrOCs in the effluent over the course of three months of continuous flow (480 empty bed volumes), while sample ports spaced at 25% and 50% along the column depth provide windows to observe contaminant transport. Biochar provided greater benefit to TrOC removal than RAC on a mass basis. This study used relatively high concentrations of contaminants and low biochar and RAC content to observe contaminant transport. Performance in the field is likely to be significantly better with higher biochar- and RAC-content filters and lower ambient stormwater contaminant concentrations. This study provides proof-of-concept for biochar- and RAC-amended engineered media filters operated at a flow rate of 20 cm hr<sup>–1</sup> for removing dissolved TrOCs and metals and offers insights on the performance of biochar and RAC for improved stormwater treatment and field trials.</p>","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/ca/38/vg2c00037.PMC9856624.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9183257","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}
Pub Date : 2022-09-27DOI: 10.1021/acsenvironau.2c00015
Jana Meierdierks*, Christiane Zarfl, Barbara Beckingham and Peter Grathwohl*,
Long-term accumulation in the soils of ubiquitous organic pollutants such as many polycyclic aromatic hydrocarbons (PAHs) depends on deposition from the atmosphere, revolatilization, leaching, and degradation processes such as photolysis and biodegradation. Quantifying the phase distribution and fluxes of these compounds across environmental compartments is thus crucial to understand the long-term contaminant fate. The gas-phase exchange between soil and atmosphere follows chemical fugacity gradients that can be approximated by gas-phase concentrations, yet which are difficult to measure directly. Thus, passive sampling, measured sorption isotherms, or empirical relationships to estimate sorption distribution have been combined in this study to determine aqueous (or gas) phase concentrations from measured bulk concentrations in soil solids. All these methods have their strengths and weaknesses but agree within 1 order of magnitude except for ex situ passive samplers employed in soil slurries, which estimated much lower concentrations in soil water and gas likely due to experimental artifacts. In field measurements, PAH concentrations determined in the atmosphere show a pronounced seasonality with some revolatilization during summer and gaseous deposition during winter, but overall dry deposition dominates annual mean fluxes. The characteristic patterns of PAHs in the different phases (gas phase, atmospheric passive samplers, bulk deposition, and soil solids) confirm the expected compound-specific distribution pattern and behavior. Since revolatilization fluxes in summer are only minor and wet and dry deposition is ongoing, our results clearly show that the PAH loads in topsoils will continue to increase.
{"title":"Comprehensive Multi-compartment Sampling for Quantification of Long-Term Accumulation of PAHs in Soils","authors":"Jana Meierdierks*, Christiane Zarfl, Barbara Beckingham and Peter Grathwohl*, ","doi":"10.1021/acsenvironau.2c00015","DOIUrl":"10.1021/acsenvironau.2c00015","url":null,"abstract":"<p >Long-term accumulation in the soils of ubiquitous organic pollutants such as many polycyclic aromatic hydrocarbons (PAHs) depends on deposition from the atmosphere, revolatilization, leaching, and degradation processes such as photolysis and biodegradation. Quantifying the phase distribution and fluxes of these compounds across environmental compartments is thus crucial to understand the long-term contaminant fate. The gas-phase exchange between soil and atmosphere follows chemical fugacity gradients that can be approximated by gas-phase concentrations, yet which are difficult to measure directly. Thus, passive sampling, measured sorption isotherms, or empirical relationships to estimate sorption distribution have been combined in this study to determine aqueous (or gas) phase concentrations from measured bulk concentrations in soil solids. All these methods have their strengths and weaknesses but agree within 1 order of magnitude except for <i>ex situ</i> passive samplers employed in soil slurries, which estimated much lower concentrations in soil water and gas likely due to experimental artifacts. In field measurements, PAH concentrations determined in the atmosphere show a pronounced seasonality with some revolatilization during summer and gaseous deposition during winter, but overall dry deposition dominates annual mean fluxes. The characteristic patterns of PAHs in the different phases (gas phase, atmospheric passive samplers, bulk deposition, and soil solids) confirm the expected compound-specific distribution pattern and behavior. Since revolatilization fluxes in summer are only minor and wet and dry deposition is ongoing, our results clearly show that the PAH loads in topsoils will continue to increase.</p>","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/f9/c4/vg2c00015.PMC10125305.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9356664","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}
Pub Date : 2022-09-23DOI: 10.1021/acsenvironau.2c00034
Nguyen Thanh Tung, Shang-Yang Lin, Wen-Te Liu, Yi-Chun Kuan, Chih-Da Wu, Huynh Nguyen Xuan Thao, Hoang Ba Dung, Tran Phan Chung Thuy and Hsiao-Chi Chuang*,
We conducted a cross-sectional study to investigate associations of particulate matter (PM) of less than 2.5 μm in aerodynamic diameter (PM2.5) and PM deposition with nocturnal changes in body composition in obstructive sleep apnea (OSA) patients. A bioelectric impedance analysis was used to measure the pre- and postsleep body composition of 185 OSA patients. Annual exposure to PM2.5 was estimated by the hybrid kriging/land-use regression model. A multiple-path particle dosimetry model was employed to estimate PM deposition in lung regions. We observed that an increase in the interquartile range (IQR) (1 μg/m3) of PM2.5 was associated with a 20.1% increase in right arm fat percentage and a 0.012 kg increase in right arm fat mass in OSA (p < 0.05). We observed that a 1 μg/m3 increase in PM deposition in lung regions (i.e., total lung region, head and nasal region, tracheobronchial region, and alveolar region) was associated with increases in changes of fat percentage and fat mass of the right arm (β coefficient) (p < 0.05). The β coefficients decreased as follows: alveolar region > head and nasal region > tracheobronchial region > total lung region (p < 0.05). Our findings demonstrated that an increase in PM deposition in lung regions, especially in the alveolar region, could be associated with nocturnal changes in the fat percentage and fat mass of the right arm. PM deposition in the alveolar region could accelerate the body fat accumulation in OSA.
{"title":"Higher Particulate Matter Deposition in Alveolar Region Could Accelerate Body Fat Accumulation in Obstructive Sleep Apnea","authors":"Nguyen Thanh Tung, Shang-Yang Lin, Wen-Te Liu, Yi-Chun Kuan, Chih-Da Wu, Huynh Nguyen Xuan Thao, Hoang Ba Dung, Tran Phan Chung Thuy and Hsiao-Chi Chuang*, ","doi":"10.1021/acsenvironau.2c00034","DOIUrl":"10.1021/acsenvironau.2c00034","url":null,"abstract":"<p >We conducted a cross-sectional study to investigate associations of particulate matter (PM) of less than 2.5 μm in aerodynamic diameter (PM<sub>2.5</sub>) and PM deposition with nocturnal changes in body composition in obstructive sleep apnea (OSA) patients. A bioelectric impedance analysis was used to measure the pre- and postsleep body composition of 185 OSA patients. Annual exposure to PM<sub>2.5</sub> was estimated by the hybrid kriging/land-use regression model. A multiple-path particle dosimetry model was employed to estimate PM deposition in lung regions. We observed that an increase in the interquartile range (IQR) (1 μg/m<sup>3</sup>) of PM<sub>2.5</sub> was associated with a 20.1% increase in right arm fat percentage and a 0.012 kg increase in right arm fat mass in OSA (<i>p</i> < 0.05). We observed that a 1 μg/m<sup>3</sup> increase in PM deposition in lung regions (i.e., total lung region, head and nasal region, tracheobronchial region, and alveolar region) was associated with increases in changes of fat percentage and fat mass of the right arm (β coefficient) (<i>p</i> < 0.05). The β coefficients decreased as follows: alveolar region > head and nasal region > tracheobronchial region > total lung region (<i>p</i> < 0.05). Our findings demonstrated that an increase in PM deposition in lung regions, especially in the alveolar region, could be associated with nocturnal changes in the fat percentage and fat mass of the right arm. PM deposition in the alveolar region could accelerate the body fat accumulation in OSA.</p>","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsenvironau.2c00034","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9356020","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}
Pub Date : 2022-09-21DOI: 10.1021/acsenvironau.2c00052
Antonia Praetorius, and , Ian T. Cousins*,
A the summer nears its end in the northern hemisphere, we are pleased to publish the latest issue of ACS Environmental Au. In this Editorial, Ian Cousins, one of ACS Environmental Au’s Associate Editors, provides some useful tips for authors who want to improve the visibility and reach of their published work, while Antonia Praetorius, a member of the Editorial Advisory Board of ACS Environmental Au, summarizes the eight articles published in this issue. ■ IMPROVING THE REACH OF YOUR PUBLISHED ARTICLE
{"title":"ACS Environmental Au─How to Improve the Reach of Your Open Access Research","authors":"Antonia Praetorius, and , Ian T. Cousins*, ","doi":"10.1021/acsenvironau.2c00052","DOIUrl":"https://doi.org/10.1021/acsenvironau.2c00052","url":null,"abstract":"A the summer nears its end in the northern hemisphere, we are pleased to publish the latest issue of ACS Environmental Au. In this Editorial, Ian Cousins, one of ACS Environmental Au’s Associate Editors, provides some useful tips for authors who want to improve the visibility and reach of their published work, while Antonia Praetorius, a member of the Editorial Advisory Board of ACS Environmental Au, summarizes the eight articles published in this issue. ■ IMPROVING THE REACH OF YOUR PUBLISHED ARTICLE","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsenvironau.2c00052","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72202481","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}