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Environmental fate of monosodium methanearsonate (MSMA)—Part 2: Modeling sequestration and transformation 甲烷胂酸钠(MSMA)的环境归宿--第 2 部分:螯合和转化模型。
IF 3 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-25 DOI: 10.1002/ieam.4962
W. Martin Williams, J. Mark Cheplick, Stuart Z. Cohen, Michal Eldan, Cornelis G. Hoogeweg, Yoko Masue-Slowey, Raghu Vamshi

Monosodium methanearsonate (MSMA), a sodium salt of monomethylarsonic acid (MMA), is a selective contact herbicide used for the control of a broad spectrum of weeds. In water, MSMA dissociates to ions of sodium (Na+) and monomethylarsonate (MMA) that is stable and does not transform abiotically. In soils characteristic of MSMA use, several simultaneous processes can occur: (1) microbial methylation of MMA to dimethylarsinic acid (DMA), (2) microbial demethylation of MMA to inorganic arsenic (iAs), (3) methylation of iAs to MMA, and (4) sorption and sequestration of MMA and its metabolites to soil minerals. Sequestered residues are residues that cannot be desorbed from soil in environmental conditions. Sequestration is rapid in the initial several days after MSMA application and continues at a progressively slower rate over time. Once sequestered, MMA and its metabolites are inaccessible to soil microorganisms and cannot be transformed. The rate and extent of the sorption and sequestration as well as the mobility of MMA and its metabolites depend on the local edaphic conditions. In typical MSMA use areas, the variability of the edaphic conditions is constrained. The goal of this research was to estimate the amount of iAs potentially added to drinking water as a result of the use of MSMA, with models and scenarios developed by the US Environmental Protection Agency for pesticide risk assessment. In this project, the estimated drinking water concentrations (EDWCs) for iAs were assessed as the average concentration in the reservoir over a 30-year simulation with annual applications of MSMA at maximum label rates. When the total area of suitable land was assumed to be treated, EDWCs ranged from <0.001 to 0.12 µg/L. When high estimates of actually treated acreage are considered, the EDWCs are below 0.06 µg/L across all scenarios. Integr Environ Assess Manag 2024;20:2076–2087. © 2024 The Author(s). Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC).

甲胂酸钠(MSMA)是单甲基胂酸(MMA)的钠盐,是一种选择性接触除草剂,用于控制多种杂草。在水中,MSMA 会解离成钠(Na+)离子和单甲基胂酸(MMA-)离子,这种离子很稳定,不会发生非生物转化。在具有使用 MSMA 特性的土壤中,会同时发生几个过程:(1) 微生物将 MMA 甲基化为二甲基砷酸 (DMA),(2) 微生物将 MMA 去甲基化为无机砷 (iAs),(3) 将 iAs 甲基化为 MMA,(4) MMA 及其代谢物吸附并固着在土壤矿物中。螯合残留物是指在环境条件下无法从土壤中解吸的残留物。在施用 MSMA 后的最初几天,固着速度很快,随着时间的推移,固着速度逐渐减慢。一旦被螯合,MMA 及其代谢物就无法被土壤微生物所利用,也无法被转化。MMA 及其代谢物的吸附和固着速度和程度以及流动性取决于当地的土壤条件。在典型的 MSMA 使用区,土壤环境条件的可变性受到限制。本研究的目标是利用美国环境保护局为农药风险评估开发的模型和方案,估算因使用 MSMA 而可能添加到饮用水中的 iAs 数量。在该项目中,iAs 的估计饮用水浓度(EDWCs)被评估为 30 年模拟期间水库中的平均浓度,每年以最大标签率施用 MSMA。当假定适宜土地的总面积得到处理时,EDWCs 的范围为
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引用次数: 0
Household dog fecal composting: Current issues and future directions 家用狗粪堆肥:当前问题和未来方向。
IF 3 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-24 DOI: 10.1002/ieam.4970
Emily Bryson, Amie Anastasi, Lisa Bricknell, Ryan Kift

Dog feces are a known source of nutrient, pathogen, and plastic pollution that can harm human and ecosystem health. Home composting may be a more environmentally sustainable method of managing dog feces and reducing this pollution. While composting is an established method for recycling animal manures into low-risk soil conditioners for food production, few studies have investigated whether household-scale compost methods can safely and effectively process dog feces for use in backyard edible gardens. A broad range of literature on in situ composting of dog feces is evaluated and compared according to scale, parameters tested, and compost methods used. Studies are analyzed based on key identified knowledge gaps: appropriate compost technologies to produce quality soil conditioner on small scales, potential for fecal pathogen disinfection in mesophilic compost conditions, and biodegradation of compostable plastic dog waste bags in home compost systems. This review also discusses how existing methods and quality standards for commercial compost can be adapted to dog fecal home composting. Priorities for future research are investigation of household-scale aerobic compost methods and potential compost amendments needed to effectively decompose dog feces and compostable plastic dog waste bags to produce a good-quality, sanitized, beneficial soil conditioner for use in home gardens. Integr Environ Assess Manag 2024;20:1876–1891. © 2024 The Author(s). Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC).

众所周知,狗的粪便是养分、病原体和塑料污染的来源,会损害人类和生态系统的健康。家庭堆肥可能是一种更具环境可持续性的管理狗粪便和减少污染的方法。虽然堆肥是一种成熟的方法,可将动物粪便回收利用,制成低风险的土壤改良剂用于食品生产,但很少有研究调查家庭规模的堆肥方法是否能安全有效地处理狗粪便,并将其用于后院的食用花园。根据规模、测试参数和使用的堆肥方法,对有关狗粪便就地堆肥的大量文献进行了评估和比较。研究分析的依据是已确定的主要知识空白:小规模生产优质土壤改良剂的适当堆肥技术、中亲环境堆肥条件下粪便病原体消毒的潜力以及家庭堆肥系统中可堆肥塑料狗粪袋的生物降解。本综述还讨论了现有的商业堆肥方法和质量标准如何适用于狗粪便家庭堆肥。未来研究的重点是调查家庭规模的好氧堆肥方法以及有效分解狗粪和可堆肥塑料狗粪袋所需的潜在堆肥添加剂,以生产出优质、消毒、有益的土壤改良剂,供家庭菜园使用。Integr Environ Assess Manag 2024;00:1-16。© 2024 The Author(s).综合环境评估与管理》由 Wiley Periodicals LLC 代表环境毒理学与化学学会 (SETAC) 出版。
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引用次数: 0
Recovery of ecosystems pollution by contaminants of potential concern using phytoremediation techniques 利用植物修复技术恢复受潜在污染物污染的生态系统。
IF 3 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-24 DOI: 10.1002/ieam.4973
Arindam Ghosh, James Stening, Rahul Chakraborty

Phytoremediation is a technology that uses plants to break down, remove, and immobilize contaminants in surface water, shallow groundwater, and sediment to achieve cost savings compared with conventional treatments. This study describes a marshy land on an explosives manufacturing site in India that consistently reported elevated concentrations of nitrates, nitrites, ammonia, perchlorate, and lead (contaminants of potential concern—CoPC). The study also illustrates the potential for addressing the human health and environmental risks associated with the explosives manufacturing industrsy in India using innovative, sustainable, and carbon-neutral techniques. This work focuses on reconstructed marshy lands, desedimentation, microwatershed management, and phytoremediation using Phragmites and Vetiveria species (also known as vetiver) to reduce contaminants in surface water and groundwater, improve stormwater management and carbon capture, and increase natural capital like biodiversity. The results obtained during the trial indicate that the selected indigenous species are effective and can be used to remediate sediment and shallow groundwater for many CoPC in tropical climates. Integr Environ Assess Manag 2024;20:1987–2002. © 2024 SETAC

植物修复是一种利用植物分解、去除和固定地表水、浅层地下水和沉积物中污染物的技术,与传统的处理方法相比,可以节省成本。本研究描述了印度一个爆炸物生产基地的沼泽地,该沼泽地的硝酸盐、亚硝酸盐、氨、高氯酸盐和铅(潜在关注污染物--CoPC)浓度持续升高。这项研究还说明了利用创新、可持续和碳中和技术解决与印度炸药制造工业相关的人类健康和环境风险的潜力。这项工作的重点是重建沼泽地、沉积、微流域管理,以及利用苇草和香根草(又称香根草)进行植物修复,以减少地表水和地下水中的污染物,改善雨水管理和碳捕获,并增加生物多样性等自然资本。试验结果表明,所选的本地物种是有效的,可用于修复热带气候条件下的沉积物和浅层地下水。Integr Environ Assess Manag 2024;00:1-16。© 2024 SETAC.
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引用次数: 0
Applying Intelligent Control for the scale-up of advanced oxidation processes for treated wastewater 应用智能控制技术扩大废水处理高级氧化工艺的规模。
IF 3.1 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-19 DOI: 10.1002/ieam.4935
J. Daniel Velducea-Ruíz, Leonel E. Amabilis-Sosa, Guillermo J. Rubio-Astorga, Julio C. Picos-Ponce
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引用次数: 0
Microplastics: A potential booster for PFAS in biosolids 微塑料:生物固体中 PFAS 的潜在助推器。
IF 3.1 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-19 DOI: 10.1002/ieam.4965
Samreen Siddiqui
<p>Imagine enjoying a refreshing glass of water, only to discover tiny plastic particles swirling within. This unsettling reality is becoming increasingly common as microplastics (MPs), plastic fragments smaller than a grain of rice (<5 mm diam.), infiltrate our environment at an alarming rate. From the deepest trenches of the ocean to the peaks of mountains, these invisible invaders pose a significant potential threat to wildlife and even human health (Li et al., <span>2023</span>; Zolotova et al., <span>2022</span>). Microplastics are now recognized as a major contemporary global problem (Mitrano & Wagner, <span>2021</span>; Sendra et al., <span>2021</span>), with a current estimate of 1.5 million tons of MP waste in the waterways globally (Boucher & Friot, <span>2017</span>).</p><p>Per- and polyfluoroalkyl substances (PFAS), often referred to as “forever chemicals” due to their persistence in the environment, present a hidden threat to human health (Fenton et al., <span>2021</span>). These man-made chemicals, lauded for their water and stain-repelling properties, lurk unseen in a vast array of consumer products. However, their presence comes at a cost. Most recently (January 2024) method 1633, which created a stable and uniform approach for the analytical identification of PFAS, was approved by USEPA to identify 40 PFAS compounds. On 10 April 2024, the USEPA announced the final National Primary Drinking Water Regulation (NPDWR) for six PFAS (PFOA, PFOS, PFHxS, PFNA, PFBS, and HFPO-DA). This enables USEPA to establish legally enforceable levels, called Maximum Contaminant Levels, for six PFAS in drinking water.</p><p>In addition to being a primary source of pollution, MPs can also act as a carrier (via sorption and desorption) for other contaminants including PFAS. Some of the plastic types, including polytetrafluoroethylene and polyvinyl fluoride, can contribute PFAS directly to the environment. However, this is a very small contribution compared with the potential adsorption pathway via widespread MP pollution globally. This does not disregard PFAS concerns, as some authors have suggested (Lohmann et al., <span>2020</span>). Rather, MPs might also increase the overall availability of PFAS in biosolids. As MPs degrade, they could release any absorbed PFAS, making them more bioavailable (available for uptake by organisms).</p><p>There are also concerns that MPs can be more efficient in adsorbing PFAS in the presence of other organic and inorganic matter, when compared with controlled environments, due to their large surface area and strong hydrophobic nature (Scott et al., <span>2021</span>). The adsorption of PFAS to MPs was identified as thermodynamically spontaneous due to the increased entropy at 25 °C, based on Gibb's free energy (Δ<i>G</i> = −16 to −23 kJ/mol), reaching equilibrium within 7–9 h (Salawu et al., <span>2024</span>). This suggests that PFAS may partition to the MP surface within a few hours in fresh and marine wate
想象一下,在享受一杯清爽的水时,却发现里面有微小的塑料颗粒在旋转。这种令人不安的现实正变得越来越普遍,因为微塑料(MPs),即直径小于米粒(5 毫米)的塑料碎片,正以惊人的速度渗入我们的环境。从海洋深处的海沟到高山之巅,这些看不见的入侵者对野生动物甚至人类健康都构成了巨大的潜在威胁(Li 等人,2023 年;Zolotova 等人,2022 年)。微塑料现已被公认为当代全球的一个主要问题(Mitrano &amp; Wagner, 2021; Sendra et al.这些人造化学物质因其防水防污的特性而备受赞誉,却潜伏在大量消费品中,不为人知。然而,它们的存在是有代价的。最近(2024 年 1 月),美国环保局批准了 1633 方法,该方法为分析鉴定 PFAS 提供了一种稳定统一的方法,可鉴定 40 种 PFAS 化合物。2024 年 4 月 10 日,美国环保局宣布了针对六种 PFAS(PFOA、PFOS、PFHxS、PFNA、PFBS 和 HFPO-DA)的最终《国家主要饮用水法规》(NPDWR)。这使得美国环保局能够针对饮用水中的六种 PFAS 制定法律强制执行水平,即最大污染物水平。除了作为主要污染源,MPs 还可以作为其他污染物(包括 PFAS)的载体(通过吸附和解吸)。包括聚四氟乙烯和聚氟乙烯在内的一些塑料类型会直接向环境中排放 PFAS。不过,与全球广泛存在的 MP 污染的潜在吸附途径相比,这只是很小的一部分。这并不像一些作者所认为的那样(Lohmann 等人,2020 年),可以忽略对 PFAS 的关注。相反,MPs 还可能增加生物固体中 PFAS 的总体可得性。随着 MPs 降解,它们可能会释放出任何被吸收的全氟辛烷磺酸,使其生物利用率更高(可被生物体吸收)。还有人担心,与受控环境相比,MPs 由于其表面积大、疏水性强,在存在其他有机和无机物质的情况下,吸附全氟辛烷磺酸的效率更高(Scott 等人,2021 年)。根据吉布斯自由能(ΔG = -16 至 -23 kJ/mol),全氟辛烷磺酸在 25 °C时熵增加,因此全氟辛烷磺酸对 MPs 的吸附被确定为热力学自发吸附,在 7-9 小时内达到平衡(Salawu 等人,2024 年)。这表明,在淡水和海水中,全氟辛烷磺酸可在几小时内分馏到 MP 表面。由环境中的藻类、细菌和其他微生物组成的生物膜会进一步影响 MPs 的吸附特性(Lagarde 等人,2016 年)。这一点尤其令人担忧,因为全氟辛烷磺酸和多溴联苯醚往往会在废水中积聚在一起,最终进入固体废物的比例更高。这些浓缩条件为 MPs 增加对 PFAS 的吸附创造了有利环境。在美国大陆,当生物固体废弃物被进一步用于土地施用(56%),包括农田(31%)、开垦场地(如采矿场)(1%)和其他(24%);填埋(27%),包括城市固体废弃物(24%)和单层垃圾(3%);焚烧(16%)和其他(1%)时,这就成为一个值得关注的问题(美国环保局,2023 年)。施用吸附了多溴联苯醚的生物固体可能会提高作物对 PFAS 的生物利用率,从长远来看,作物会发生生物富集。最近,一项研究报告称,在华盛顿州中北部道格拉斯县的沃特维尔高原,23 年的生物固体施用导致每公斤土壤中的 MP 浓度达到 360 至 500 微粒(Adhikari 等人,2024 年)。这凸显了生物固体可能成为环境中 MPs 和 PFAS 的来源。目前,还没有任何法规可以为大多数新出现的污染物 (CEC) 提供指导,包括废水中的 MPs 和 PFAS。对生物固体废物中的 MPs 和 PFAS 以及很可能存在的其他持久性新兴污染物进行监管至关重要。这不仅能保护公众健康,还能推动研究工作,开发有效的去除技术。由于多溴联苯质量小,在废水去除过程中不易分离。因此,有必要开发具有成本效益的废水处理技术,以帮助生物固体在施用到田地之前去除其中的 MP。本评论呼吁研究人员更多地了解 MPs-PFAS 的相互作用,并帮助制定有效的解决方案。为了保护我们的健康和环境,我们需要多管齐下,包括监管、研究和技术创新。
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引用次数: 0
Sediment assessment, management, and regulation in the 21st century 21 世纪的沉积物评估、管理和法规。
IF 3.1 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-19 DOI: 10.1002/ieam.4949
Richard J. Wenning, Sabine E. Apitz
<p>Nearly 20 years ago, SETAC published the results of a Pellston Workshop on methods for assessing and setting sediment quality guidelines (SQGs) and associated tools (Wenning et al., <span>2004</span>). This was done to compile the state of science describing the harmful effects of chemical contaminants in sediments on freshwater and marine aquatic life. Since then, there have been significant advances in sediment ecotoxicology, monitoring methods, and risk assessment practices, as well as management strategies. The definition of “sediment quality” has also evolved and now encompasses more than just toxicity. It considers the chemical and physical characteristics of sediment that contribute to the health of aquatic ecosystems, including the quality of overlying waters and aquatic food chains. Advances have been made in the interpretation of the ecosystem services both provided and affected by sediments (Apitz, <span>2012</span>), as well as environmental baseline values used to identify the nature and extent of environmental changes outside the range of natural variability (Brown et al., <span>2022</span>).</p><p>While sediment sampling methods have changed little over the years, the methods for analyzing and interpreting various biological, chemical, and physical parameters used to evaluate sediment risk have advanced considerably (Bruce et al., <span>2021</span>). Broader and smarter sediment screening methods and advanced analytical chemistry and assessment methodologies capable of providing insights into the drivers of sediment toxicity offer some relief to traditional limitations of sediment quality investigations (Brennan et al., <span>2021</span>; de Baat et al., <span>2019</span>; Feiler et al., <span>2013</span>). Nanosensors and new analytical methods are available for assessing biological contamination, nanopollution, and new and/or emerging chemical substances in sediments and surface waters to support management activities that protect aquatic life and human health (Hairom et al., <span>2021</span>). Passive sampling, toxicity identification evaluation methods, and omics-based eco-surveillance tools have matured considerably and provide data that inform sediment assessment, regulation, and management (Heise et al., <span>2020</span>; Li et al., <span>2018</span>; Shah et al., <span>2019</span>). New methods involving measurements of e-DNA and e-RNA and other molecular biomonitoring tools, less intrusive passive samplers to measure contaminants in sediment porewater, and the determination of metrics of biotic and ecological integrity (e.g., taxonomic richness, composition, and tolerance and/or intolerance indices) provide indispensable information for managing aquatic ecosystems more effectively (Anaisce et al., <span>2023</span>; Giroux et al., <span>2022</span>).</p><p>At the same time, climate change and a relatively new suite of “emerging” contaminants, such as microplastics, nanoparticles, substances in personal care and pharma
这种新的关注取决于对生态系统特定沉积物质量的更广泛理解。例如,沉积物作为保护海滩和海岸线以及创造和维持湿地和沿海生境的材料来源,必须具有合适的质量,也就是说,沉积物必须不含潜在有害的污染物浓度。在制定可持续的长期管理计划和决策时,地区和国家沿海及河流流域战略也需要更深入地考虑基线沉积物数量和质量条件的作用。世界各地的商业港口都面临着不可避免的挑战,既要保持和保护环境,又要平衡流域和沿海地区的经济发展和社会需求。对水生生态系统的环境评估通常包括对沉积物的评估和测量,重点是土地和水的利用、景观尺度的管理,以及对生物多样性和生态系统功能与服务的提供和恢复的影响。这些观点和对未来的预测清楚地表明,了解和管理沉积物在流域尺度上对各种终点的动态相互作用,对于今后有效管理沉积物至关重要。未来的沉积物管理,包括疏浚物处理和沉积物有益再利用战略,以及适应全球变化的战略,都需要通过强调自然和基于自然的解决方案来保持沉积物质量和保护水生生态系统,从而迅速适应变化。在 20 年后的今天,我们发现企业和政府的资源管理专业人员对有关评估和管理受污染沉积物的实用科学信息指导有着强烈的需求。沉积物在地表水质和食物链中发挥着重要作用。一直以来,人们对调查和评估方法如何为沉积物管理、保护水生资源和人类对水生环境的利用提供信息关注不够。此外,目前全世界还没有统一的技术指南。这引发了监管机构和利益相关者对沿海、淡水和海洋生态系统管理的持续争论,特别是在涉及渔业、污染和水质的跨境管理的情况下。需要深入了解诊断沉积物生态系统的特定生物、化学和地球物理特性的基本科学原理和不同工具的效用。虽然推导 SQGs 所依据的大部分科学依据与 20 世纪 90 年代相比没有变化,但应提醒利益相关者注意与不同方法相关的优势、局限性和方法上的不确定性,这些方法用于推导监管机构经常使用的特定化学物质或特定水体沉积物质量基准和指导值。因此,我们认为现在是新一代科学家和专业人士重新审视影响沉积物中污染物风险和行为的化学、物理和生物属性的时候了。同时,我们也需要重新审视为修复、生态恢复和可持续沉积物管理决策提供信息的工具和实践。我们与国际专家团队合作,已开始将这些进展整理成一本新书,讨论 21 世纪管理中的沉积物评估问题。我们的目标是在 2025 年分享这些知识。对于研究人员来说,我们希望这本书能激励他们开发出更好的新方法和工具,将污染沉积物的调查、评估和修复与未来的沉积物管理实践结合起来。对于沉积物管理者和监管机构,我们希望能进一步激励他们对水生生态系统进行长期和可持续的管理:写作-原稿;写作-审阅和编辑。Sabine E. Apitz:写作-原稿;写作-审阅和编辑。
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引用次数: 0
Books and Other Reviews 书籍和其他评论
IF 3.1 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-19 DOI: 10.1002/ieam.4951
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引用次数: 0
Toward a life cycle approach for classifying the toxicity of refrigerants 采用生命周期方法对制冷剂的毒性进行分类。
IF 3.1 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-19 DOI: 10.1002/ieam.4964
Federico Sinche Chele, Louise Stevenson, Christian Mark Salvador, Fred Dolislager, Teresa Mathews
<p>The American Society of Heating Refrigerating and Air-Conditioning Engineers (ASHRAE) classifies the safety of refrigerants based on their flammability and toxicity. Toxicity classifications are based on Occupational Exposure Limits (OEL), which estimate industry workers' exposure conditions and frequency (ASHRAE, <span>2013</span>, <span>2019</span>). Using these exposure limits and acute toxicity exposure limit values set to prevent danger to life or health, the toxicity classifications are based on a threshold, where Class A (lower toxicity) is assigned when the OEL is higher than 400 ppm while Class B (higher toxicity) refrigerants have OELs below this threshold (ASHRAE, <span>2013</span>). In general, refrigerants are not considered to be highly toxic compounds. Table 1 shows that the most commonly used hydrofluoroolefin (HFO) refrigerants are in Class A1, which is an indication of lower toxicity for mammals (“A”) and no flame propagation (“1”) (ASHRAE, <span>2013</span>). Nevertheless, it is important to point out that this toxicity classification only pertains to the parent compound and not necessarily to the precursors used in refrigerant manufacturing or the degradation products resulting from refrigerant emissions or use. Furthermore, the fully fluorinated methyl group (-CF3) in HFOs has prompted their classification as per- and polyfluoroalkyl substances (PFAS) in the United States and Europe (Table 1).</p><p>The newest classes of refrigerants, hydrofluorocarbons (HFCs) and HFOs or halogenated olefins are currently in use due to their low global warming potentials (GWPs) and negligible ozone depletion potentials (ODPs). The addition of hydrogen in HFCs and a double bond in HFOs have helped lower their GWPs. For example, the double bond in HFOs is highly reactive with atmospheric hydroxyl (OH) radicals, which leads to their short atmospheric lifetimes and low GWP. However, because these compounds degrade quickly, they have the potential to create significant yields of various degradation products. One of the most well-known degradation products, particularly from HFCs (e.g., R-227ea) and HFOs (e.g., R-1234yf), is trifluoroacetic acid (TFA), whose classification as an ultrashort PFAS is under considerable debate (Table 1). This classification has policy implications as both the European Commission and the USEPA have signaled their commitments to systematically decrease the usage of PFAS compounds (Glüge et al., <span>2020</span>). Scientific arguments have been made to manage all PFAS compounds together as a chemical class because of their common characteristics of being highly persistent, bioaccumulative, and potentially hazardous (Kwiatkowski et al., <span>2020</span>). Trifluoroacetic acid is the simplest of the perfluorocarboxylic acid (PFCA) group of substances (Burkholder et al., <span>2015</span>) and is generally regarded to be highly persistent in the environment, toxic at elevated concentrations, and bioaccumulative dependin
美国采暖、制冷和空调工程师学会(ASHRAE)根据制冷剂的可燃性和毒性对其安全性进行分类。毒性分类基于职业接触限值(OEL),该限值估计了行业工人的接触条件和频率(ASHRAE,2013 年,2019 年)。利用这些接触限值和为防止危及生命或健康而设定的急性毒性接触限值,毒性分类以阈值为基础,当 OEL 高于 400 ppm 时,则划分为 A 类(低毒性),而 B 类(高毒性)制冷剂的 OEL 低于该阈值(ASHRAE,2013 年)。一般来说,制冷剂不属于剧毒化合物。表 1 显示,最常用的氢氟烯烃 (HFO) 制冷剂属于 A1 级,这表明其对哺乳动物的毒性较低("A"),且无火焰传播性("1")(ASHRAE,2013 年)。不过,必须指出的是,这种毒性分类只与母体化合物有关,而不一定与制冷剂制造过程中使用的前体或制冷剂排放或使用过程中产生的降解产物有关。此外,HFOs 中的全氟化甲基(-CF3)已促使美国和欧洲将其归类为全氟和多氟化烷基物质(PFAS)(表 1)。在 HFCs 中加入氢和在 HFOs 中加入双键有助于降低其全球升温潜能值。例如,氢氟烯烃中的双键与大气中的羟基(OH)自由基高度反应,导致其在大气中的寿命较短,全球升温潜能值较低。然而,由于这些化合物降解迅速,它们有可能产生大量的各种降解产物。最著名的降解产物之一是三氟乙酸(TFA),尤其是来自 HFCs(如 R-227ea)和 HFOs(如 R-1234yf)的降解产物。这种分类对政策有影响,因为欧盟委员会和美国环保局都表示将致力于系统地减少 PFAS 化合物的使用(Glüge 等人,2020 年)。由于全氟辛烷磺酸化合物具有高持久性、生物累积性和潜在危害性等共同特点,因此科学界主张将所有全氟辛烷磺酸化合物作为一类化学物质进行统一管理(Kwiatkowski 等人,2020 年)。三氟乙酸是全氟羧酸(PFCA)类物质中最简单的一种(Burkholder 等人,2015 年),通常被认为在环境中具有高度持久性,在浓度升高时具有毒性,并且根据其在环境中的分散情况具有生物累积性。虽然反式脂肪酸可被植物从受污染的土壤中吸收并在植物体内转移(Boutonnet 等人,1999 年),但由于其辛醇/水分配系数很低(Xu 等人,2022 年),没有足够的证据表明其在食物链中的生物累积潜力。因此,有些人认为反式脂肪酸及其人为前体(如氢氟烯烃)应被排除在未来任何监管行动之外(Singh &amp; Papanastasiou, 2021)。与卤代烯烃制冷剂相关的最大不确定因素之一是,它们是否会降解产生足够的反式脂肪酸,以提高全球海洋中估计的 239 纳克反式脂肪酸钠盐 L-1 的标称值(Frank 等人,2002 年;UNEP,2022a)。美国环保局和欧洲化学品管理局 (ECHA) 等监管机构已表示,希望通过生命周期评估 (LCA) 框架开始分析任何全氟辛烷磺酸及相关化合物(ECHA,2023 年)。这就需要分析潜在有害和持久性化合物是如何使用的,以及在其生产、消费品使用和报废处理的整个过程中如何影响环境和人类健康。已经针对全氟辛烷磺酸提出了生命周期评估框架的迭代,以更好地描述其对环境的影响(Holmquist 等人,2020 年)。Holmquist 等人(2020 年)提出的生态毒性生命周期影响评估 (LCIA) 框架综合了全氟辛烷磺酸及其转化馏分、人体毒性以及海洋和淡水水生生态毒性,以预测全氟辛烷磺酸在水生系统中的归宿和累积。这项研究的主要发现之一是,即使全氟辛烷磺酸的排放量很低,也会对生命周期评估结果产生巨大影响(Holmquist 等人,2020 年)。一般而言,生命周期评估框架包括目标和范围定义、清单分析、影响评估和解释(ISO:14040,2006 年)。
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引用次数: 0
Announcing the IEAM Best Paper Award 2023 宣布 2023 年国际工程师教育协会(IEAM)最佳论文奖。
IF 3.1 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-19 DOI: 10.1002/ieam.4950
<p>The editors of <i>Integrated Environmental Assessment and Management</i> and the Society of Environmental Toxicology and Chemistry (SETAC) are pleased to announce the selection of Best Papers Published in 2023. The IEAM editors and the SETAC Publications Advisory Committee are committed to recognizing annually the contributions of scientists and researchers from academia, business, and government. The authors of nominated papers are recognized by their peers in the field for innovative analysis, state-of-the-science considerations, and earnest focus on solutions to the world's most difficult environmental challenges.</p><p>Methods for assessing the bioaccumulation of hydrocarbons and related substances in terrestrial organisms: A critical review. <i>19</i>(6), 1433–1456. https://setac.onlinelibrary.wiley.com/doi/10.1002/ieam.4756</p><p>Frank A. P. C. Gobas, School of Resource and Environmental Management, Simon Fraser University, Burnaby, British Columbia, Canada</p><p>Yung-Shan Lee, School of Resource and Environmental Management, Simon Fraser University, Burnaby, British Columbia, Canada</p><p>Katharine M. Fremlin, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada</p><p>Stephanie C. Stelmachuk, School of Resource and Environmental Management, Simon Fraser University, Burnaby, British Columbia, Canada</p><p>Aaron D. Redman, ExxonMobil Biomedical Sciences, Annandale, New Jersey, USA</p><p>Identifying chemical substances with high bioaccumulation potential is crucial for regulating their environmental release and protecting ecosystems and human health. However, the methods currently used for regulatory bioaccumulation assessments are not always suitable for evaluating air-breathing organisms. To address this gap, Gobas et al. (2023) investigate and review both existing and new approaches for assessing the terrestrial bioaccumulation potential of hydrocarbons and related organic substances. Their comprehensive critical review systematically presents the merits and limitations of various approaches to bioaccumulation assessment and their relevance to current regulatory practices. To further the field, Gobas et al. propose a four-tier evaluation scheme to minimize effort and costs while expediting the bioaccumulation assessment of the vast numbers of organic substances that are manufactured and subsequently in circulation. The authors state it best, “The findings of the review are meant to help navigate a path forward for bioaccumulation assessment of substances that is better positioned to assess the bioaccumulation of hydrocarbons and related organic compounds in terrestrial wildlife.”</p><p>Staveley, J. P., Freeman, E. L., McArdle, M. E., Ortego, L. S., Coady, K. K., Bone, A., Lagadic, L., Weltje, L., Weyers, A., Wheeler, J. R. Current testing programs for pesticides adequately capture endocrine activity and adversity for protection of vertebrate wildlife. <i>Integrated Environmental Assessment and Ma
综合环境评估与管理》(Integrated Environmental Assessment and Management)编辑和环境毒理学与化学学会(SETAC)很高兴地宣布评选出 2023 年发表的最佳论文。综合环境评估与管理》编辑和 SETAC 出版物咨询委员会致力于每年表彰来自学术界、商界和政府部门的科学家和研究人员所做的贡献。被提名论文的作者因其创新性的分析、科学性的考量以及认真专注于解决世界上最棘手的环境挑战而得到了该领域同行的认可:评估碳氢化合物及相关物质在陆生生物体内的生物累积性的方法:重要综述》。19(6), 1433-1456. https://setac.onlinelibrary.wiley.com/doi/10.1002/ieam.4756Frank A. P. C. Gobas,加拿大不列颠哥伦比亚省本那比市西蒙弗雷泽大学资源与环境管理学院Yung-Shan Lee,加拿大不列颠哥伦比亚省本那比市西蒙弗雷泽大学资源与环境管理学院Katharine M. Fremlin,加拿大不列颠哥伦比亚省本那比市西蒙弗雷泽大学生物科学系Stephanie C.Stelmachuk, School of Resource and Environmental Management, Simon Fraser University, Burnaby, British Columbia, CanadaAaron D. Redman, ExxonMobil Biomedical Sciences, Annandale, New Jersey, USAIdentifying chemical substances with high bioaccumulation potential is crucial for regulating their environmental release and protecting ecosystems and human health.然而,目前用于监管生物蓄积性评估的方法并不总是适合评估呼吸空气的生物。为了弥补这一不足,Gobas 等人(2023 年)研究并回顾了评估碳氢化合物和相关有机物陆地生物累积潜力的现有方法和新方法。他们的综合评论系统地介绍了各种生物蓄积性评估方法的优点和局限性,以及这些方法与当前监管实践的相关性。为了促进该领域的发展,Gobas 等人提出了一个四级评估方案,以最大限度地减少工作量和成本,同时加快对大量生产和随后流通的有机物质进行生物蓄积性评估。作者说得最清楚:"审查结果旨在帮助为物质的生物蓄积性评估指引前进的道路,以便更好地评估碳氢化合物和相关有机化合物在陆生野生动物体内的生物蓄积性、Freeman, E. L., McArdle, M. E., Ortego, L. S., Coady, K. K., Bone, A., Lagadic, L., Weltje, L., Weyers, A., Wheeler, J. R. Current testing programs for pesticides adequately capture endocrine activity and adversity for the protection of vertebrate wildlife.https://setac.onlinelibrary.wiley.com/doi/10.1002/ieam.4732Furley, T. H., Calado, S. L. M., Mendes, L. B., Chagas, K. R., Andrade, D. P., Covre Barbiero, D.. Alves, C. B. M., C. M., C. M., C. M., C. M., C. M., C. M., C. M., C. M., C. M., C. M., C. M., C. M., C. M、Alves, C. B. M., Belo, P. I. D., Ribeiro-Filho, P. S. M., Niencheski, L. F. H. Short-term hydromorphological and ecological responses of using woody structures for river restoration in a tailing-impacted tropical river.综合环境评估与管理》,19(3),648-662。 https://setac.onlinelibrary.wiley.com/doi/10.1002/ieam.4721
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引用次数: 0
Debates, Dilemmas, and Discoveries 辩论、困境和发现。
IF 3.1 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-19 DOI: 10.1002/ieam.4974
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引用次数: 0
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