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A census tract-level assessment of social determinants of health, traffic exposure, and asthma exacerbations in New York State's Medicaid Population (2005–2015) 对纽约州医疗补助人口的健康、交通接触和哮喘恶化的社会决定因素进行人口普查区级评估(2005-2015 年)
Pub Date : 2024-04-26 DOI: 10.1016/j.eehl.2024.04.005
Temilayo Adeyeye , Tabassum Zarina Insaf , Catherine Adler , Victoria Wagner , Anisa Proj , Susan McCauley

This study aims to evaluate the association between social determinants, environmental exposure metrics, and the risk of asthma emergency department (ED) visits in the New York State (NYS) Medicaid population using small-area analysis. Traffic densities for each census tract in NYS were calculated using the length of road segments within each tract and total area of the tract to produce a measure of average number of vehicles per square meter per day. Data on social determinants of health including internal and external environments and other demographic factors were obtained from various sources. Poisson regression analyses were conducted to identify significant factors associated with asthma ED visits in Medicaid claim and encounter data for years 2005–2015. High traffic density in NYS excluding New York City (NYC) correlated with increased risk of asthma ED visits (RR 1.69; 95% CI: 1.42, 2.00), mitigated by adjusting for environmental and social determinants (RR 1.00; 95% CI: 0.85, 1.19). Similar trends were observed in NYC only (RR 1.19; 95% CI: 1.00, 1.41), with the adjusted risk remaining elevated (RR 1.14; 95% CI: 0.98, 1.33) albeit not statistically significant. Living in census tracts with high concentrated disadvantage index, high proportions of minorities, and less green space predicted higher asthma ED visits. We mapped predicted rates and model residuals to identify areas of high risk. Our results support previous findings that environmental and social risk factors in poor and urban areas contribute to asthma exacerbations in the NYS Medicaid population, even if they may not necessarily contribute to its development.

本研究旨在通过小区域分析,评估纽约州(NYS)医疗补助人群中的社会决定因素、环境暴露指标和哮喘急诊就诊风险之间的关联。纽约州每个人口普查区的交通密度都是通过每个普查区内的路段长度和普查区的总面积计算得出的,以衡量每天每平方米的平均车辆数。有关健康的社会决定因素(包括内部和外部环境及其他人口因素)的数据来自各种渠道。我们进行了泊松回归分析,以确定 2005-2015 年医疗补助申请和就诊数据中与哮喘急诊就诊相关的重要因素。纽约州(不包括纽约市)的高交通密度与哮喘急诊就诊风险的增加相关(RR 1.69;95% CI:1.42, 2.00),调整环境和社会决定因素后,风险有所降低(RR 1.00;95% CI:0.85, 1.19)。仅在纽约市也观察到类似的趋势(RR 1.19;95% CI:1.00,1.41),调整后的风险仍然较高(RR 1.14;95% CI:0.98,1.33),尽管在统计上并不显著。居住在集中劣势指数高、少数民族比例高和绿地较少的人口普查区,哮喘急诊就诊率较高。我们绘制了预测率和模型残差图,以确定高风险地区。我们的研究结果支持了之前的研究结果,即贫困地区和城市地区的环境和社会风险因素会导致纽约州医疗补助人群的哮喘恶化,即使这些因素不一定会导致哮喘的发生。
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引用次数: 0
Synergistic PM2.5 and O3 control to address the emerging global PM2.5-O3 compound pollution challenges 协同控制 PM2.5 和 O3,应对新出现的全球 PM2.5-O3 复合污染挑战
Pub Date : 2024-04-19 DOI: 10.1016/j.eehl.2024.04.004

In recent years, the issue of PM2.5-O3 compound pollution has become a significant global environmental concern. This study examines the spatial and temporal patterns of global PM2.5-O3 compound pollution and exposure risks, firstly at the global and urban scale, using spatial statistical regression, exposure risk assessment, and trend analyses based on the datasets of daily PM2.5 and surface O3 concentrations monitored in 120 cities around the world from 2019 to 2022. Additionally, on the basis of the common emission sources, spatial heterogeneity, interacting chemical mechanisms, and synergistic exposure risk levels between PM2.5 and O3 pollution, we proposed a synergistic PM2.5-O3 control framework for the joint control of PM2.5 and O3. The results indicated that: (1) Nearly 50% of cities worldwide were affected by PM2.5-O3 compound pollution, with China, South Korea, Japan, and India being the global hotspots for PM2.5-O3 compound pollution; (2) Cities with PM2.5-O3 compound pollution have exposure risk levels dominated by ST + ST (Stabilization) and ST + HR (High Risk). Exposure risk levels of compound pollution in developing countries are significantly higher than those in developed countries, with unequal exposure characteristics; (3) The selected cities showed significant positive spatial correlations between PM2.5 and O3 concentrations, which were consistent with the spatial distribution of the precursors NOx and VOCs; (4) During the study period, 52.5% of cities worldwide achieved synergistic reductions in annual average PM2.5 and O3 concentrations. The average PM2.5 concentration in these cities decreased by 13.97%, while the average O3 concentration decreased by 19.18%. This new solution offers the opportunity to construct intelligent and healthy cities in the upcoming low–carbon transition.

近年来,PM2.5-O3 复合污染问题已成为全球关注的重要环境问题。本研究基于2019-2022年全球120个城市每日监测的PM2.5和地表O3浓度数据集,首先在全球和城市尺度上,采用空间统计回归、暴露风险评估和趋势分析等方法,研究了全球PM2.5-O3复合污染的时空格局和暴露风险。此外,基于PM2.5和O3污染的共同排放源、空间异质性、相互作用的化学机制和协同暴露风险水平,我们提出了PM2.5-O3协同控制框架,以实现PM2.5和O3的联合控制。结果表明(1)全球近 50%的城市受到 PM2.5-O3 复合污染的影响,其中中国、韩国、日本和印度是全球 PM2.5-O3 复合污染的热点地区;(2)PM2.5-O3 复合污染城市的暴露风险水平以 ST + ST(稳定)和 ST + HR(高风险)为主。发展中国家的复合污染暴露风险水平明显高于发达国家,暴露特征不均等;(3)所选城市的 PM2.5 和 O3 浓度在空间上呈显著正相关,这与前体物质氮氧化物和挥发性有机物的空间分布一致;(4)在研究期间,全球有 52.5%的城市实现了 PM2.5 和 O3 年均浓度的协同下降。这些城市的 PM2.5 平均浓度下降了 13.97%,而 O3 平均浓度下降了 19.18%。这一新解决方案为在即将到来的低碳转型中建设智能健康城市提供了机会。
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引用次数: 0
The power of green: Harnessing phytoremediation to combat micro/nanoplastics 绿色的力量利用植物修复技术对抗微/纳米塑料
Pub Date : 2024-04-16 DOI: 10.1016/j.eehl.2024.04.001

Plastic pollution and its potential risks have been raising public concerns as a global environmental issue. Global plastic waste may double by 2030, posing a significant challenge to the remediation of environmental plastics. In addition to finding alternative products and managing plastic emission sources, effective removal technologies are crucial to mitigate the negative impact of plastic pollution. However, current remediation strategies, including physical, chemical, and biological measures, are unable to compete with the surging amounts of plastics entering the environment. This perspective lays out recent advances to propel both research and action. In this process, phytoaccumulation, phytostabilization, and phytofiltration can be applied to reduce the concentration of nanoplastics and submicron plastics in terrestrial, aquatic, and atmospheric environments, as well as to prevent the transport of microplastics from sources to sinks. Meanwhile, advocating for a more promising future still requires significant efforts in screening hyperaccumulators, coupling multiple measures, and recycling stabilized plastics from plants. Phytoremediation can be an excellent strategy to alleviate global micro/nanoplastic pollution because of the cost-effectiveness and environmental sustainability of green technologies.

作为一个全球环境问题,塑料污染及其潜在风险已引起公众的关注。到 2030 年,全球塑料垃圾可能会翻一番,这对环境塑料的修复提出了巨大挑战。除了寻找替代产品和管理塑料排放源,有效的清除技术对于减轻塑料污染的负面影响也至关重要。然而,目前的修复策略,包括物理、化学和生物措施,都无法应对进入环境的塑料数量激增。本视角阐述了最新进展,以推动研究和行动。在这一过程中,植物蓄积、植物稳定和植物过滤可用于降低陆地、水生和大气环境中纳米塑料和亚微米塑料的浓度,以及防止微塑料从源到汇的迁移。与此同时,要倡导一个更有希望的未来,还需要在筛选高积累者、将多种措施结合起来以及从植物中回收稳定塑料等方面做出巨大努力。由于绿色技术的成本效益和环境可持续性,植物修复可以成为缓解全球微/纳米塑料污染的绝佳策略。
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引用次数: 0
Terrestrial invertebrate hosts of human pathogens in urban ecosystems 城市生态系统中人类病原体的陆生无脊椎动物宿主
Pub Date : 2024-04-16 DOI: 10.1016/j.eehl.2024.04.003

Terrestrial invertebrates in urban ecosystems are extremely species-rich, have many important roles in material flow and energy circulation, and are host to many human pathogens that pose threats to human health. These invertebrates are widely distributed in urban areas, including both out- and in-door environments. Consequently, humans are frequently in contact with them, which provides many opportunities for them to pose human health risks. However, comprehensive knowledge on human pathogen transfer via invertebrates is lacking, with research to date primarily focused on dipterans (e.g., mosquitoes, flies). Here, we take a broad taxonomic approach and review terrestrial invertebrate hosts (incl. mosquitoes, flies, termites, cockroaches, mites, ticks, earthworms, collembola, fleas, snails, and beetles) of human pathogens, with a focus on transmission pathways. We also discuss how urbanization and global warming are likely to influence the communities of invertebrate hosts and have flow-on risks to human health. Finally, we identify current research gaps and provide perspectives on future directions.

城市生态系统中的陆生无脊椎动物物种极其丰富,在物质流动和能量循环中扮演着许多重要角色,并且寄生着许多威胁人类健康的病原体。这些无脊椎动物广泛分布于城市地区,包括室外和室内环境。因此,人类经常与它们接触,这为它们对人类健康造成危害提供了很多机会。然而,关于人类病原体通过无脊椎动物传播的全面知识还很缺乏,迄今为止的研究主要集中在双翅目(如蚊子、苍蝇)。在此,我们采用广泛的分类方法,回顾了人类病原体的陆生无脊椎动物宿主(包括蚊子、苍蝇、白蚁、蟑螂、螨虫、蜱、蚯蚓、蚤、蜗牛和甲虫),并重点探讨了传播途径。我们还讨论了城市化和全球变暖可能如何影响无脊椎动物宿主群落,并对人类健康产生连锁风险。最后,我们指出了目前的研究空白,并对未来的研究方向提出了展望。
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引用次数: 0
Repeated release of cerium oxide nanoparticles altered algal responses: Growth, photosynthesis, and photosynthetic gene expression 重复释放 CeO2 纳米粒子改变了藻类的反应:生长、光合作用和光合基因表达
Pub Date : 2024-04-16 DOI: 10.1016/j.eehl.2024.04.002

The expanding production of engineered nanomaterials (ENMs) can eventually cause their increased release into and presence in aquatic ecosystems, potentially threatening the health of aquatic organisms and the stability of the ecological environment. Generally, ENMs are repeatedly released into real-world aquatic environments in relatively low concentrations, potentially affecting photosynthesis in primary producers such as algae. However, knowledge regarding the effects of repeated exposure to ENMs on algal photosynthesis is still lacking. Herein, the physiological responses of the freshwater algae Chlorella vulgaris following single and repeated exposures to cerium oxide nanoparticles (CeO2 NPs) were investigated at 10 mg/L, with a focus on photosynthesis. The results showed that repeated exposures triggered increased photosynthetic pigment contents, oxidative stress levels, decreased photosynthetic performance, and lower biomass in C. vulgaris compared to a single exposure. Photosynthesis-related genes (i.e., petA, petB, psaA, atpB, and rbcL) were found to be upregulated following repeated exposures. Particularly for petB, repeated rather than single exposure treatment significantly upregulated its expression levels by 2.92–10.24-fold compared to unexposed controls. Furthermore, increased exposure times could aggravate the interaction between CeO2 NPs and algae, elevating 8.13%, 12.13%, and 20.51% Ce distribution on the algal cell surface or intracellularly, compared to a single exposure. This study is the first to investigate the effects of ENM exposure times on algal photosynthesis, providing new insights into the assessment of the risks these materials pose to real-world aquatic environments.

工程纳米材料(ENMs)生产的不断扩大最终会导致其在水生生态系统中的释放量和存在量增加,从而对水生生物的健康和生态环境的稳定性造成潜在威胁。一般来说,ENMs 会以相对较低的浓度反复释放到现实世界的水生环境中,可能会影响藻类等初级生产者的光合作用。然而,有关反复接触 ENMs 对藻类光合作用影响的知识仍然缺乏。本文研究了淡水藻类小球藻(Chlorella vulgaris)在单次和重复接触 10 mg/L 氧化铈纳米粒子(CeO2 NPs)后的生理反应,重点关注光合作用。结果表明,与单次暴露相比,重复暴露会导致小球藻光合色素含量增加、氧化应激水平升高、光合作用性能下降以及生物量降低。重复暴露后,光合作用相关基因(即 petA、petB、psaA、atpB 和 rbcL)上调。特别是 petB,与未暴露的对照组相比,重复暴露而非单次暴露会使其表达水平显著上调 2.92-10.24 倍。此外,增加暴露时间会加剧 CeO2 NPs 与藻类之间的相互作用,与单次暴露相比,藻类细胞表面或细胞内的 Ce 分布分别增加了 8.13%、12.13% 和 20.51%。这项研究首次调查了ENM暴露时间对藻类光合作用的影响,为评估这些材料对现实世界水生环境造成的风险提供了新的见解。
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引用次数: 0
Assessment of ecological civilization construction from the perspective of environment and health in China 从环境与健康的角度评估中国的生态文明建设
Pub Date : 2024-04-02 DOI: 10.1016/j.eehl.2024.02.008

This study innovatively evaluated ecological civilization in China from the perspective of environment and health. A Composite Environmental Health Index (CEHI) was constructed based on the Driving force-Pressure-State-Impact-Response (DPSIR) and Coupling Coordination Degree (CCD) models. Results showed that significant and sustained improvements were observed in the ecological environment after ecological civilization, while economic development continued to progress at a steady pace. However, the advancement in population health (impact subsystem), exhibited comparatively modest progress, potentially linked to issues such as demographic aging and the enduring consequences of past exposure to environmental pollutants. At the provincial level, the regional development was uneven. The CEHI performance was highest in the eastern regions, followed by the central regions, with the western regions showing the least progress. Beijing, Guangdong, Jiangsu, Shanghai, and Zhejiang emerged as top performers with higher CEHI scores, which can be attributed to their favorable geographical positioning and the response subsystem. Conversely, northeastern regions (Heilongjiang, Jilin, and Liaoning) and northwestern regions (Shanxi, Gansu, Ningxia, and Qinghai) experienced limited advancements in post-ecological civilization implementation. For these underperforming regions, there is a pressing need to intensify efforts aimed at enhancing their response subsystems. In summary, China's pursuit of ecological civilization has yielded significant successes, potentially offering valuable insights for other nations striving for sustainable development. The ecological civilization model's integration of ecological environmental protection into economic, political, cultural, and social constructs may serve as a meaningful reference for the sustainable development of other countries.

本研究创新性地从环境与健康的角度对中国生态文明进行了评价。基于驱动力-压力-状态-影响-反应(DPSIR)和耦合协调度(CCD)模型,构建了环境健康综合指数(CEHI)。结果表明,生态文明建设后,生态环境得到了明显而持续的改善,经济发展继续保持稳定的步伐。然而,人口健康(影响子系统)方面的进步相对较小,这可能与人口老龄化和过去暴露于环境污染物的持久后果等问题有关。在省一级,地区发展不平衡。东部地区的 CEHI 表现最好,其次是中部地区,西部地区的进展最小。北京、广东、江苏、上海和浙江以较高的 CEHI 分数成为表现最好的地区,这与它们有利的地理位置和响应子系统有关。相反,东北地区(黑龙江、吉林和辽宁)和西北地区(山西、甘肃、宁夏和青海)在后生态文明建设方面进展有限。对于这些表现不佳的地区,迫切需要加大力度,强化其应对子系统。总之,中国对生态文明的追求取得了重大成就,可能为其他努力实现可持续发展的国家提供有价值的启示。生态文明模式将生态环境保护融入经济、政治、文化和社会建设中,可为其他国家的可持续发展提供有意义的参考。
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引用次数: 0
The silent threat and countermeasures: Navigating the mixture risk of endocrine-disrupting chemicals on pregnancy loss in China 无声的威胁与对策:中国内分泌干扰化学品对妊娠损失的混合风险导航
Pub Date : 2024-03-28 DOI: 10.1016/j.eehl.2024.03.003

Currently, many countries and regions worldwide face the challenge of declining population growth due to persistently low rates of female reproduction. Since 2017, China's birth rate has hit historic lows and continued to decline, with the death rate now equaling the birth rate. Concerns have emerged regarding the potential impact of environmental contaminants on reproductive health, including pregnancy loss. Endocrine-disrupting chemicals (EDCs) like phthalate esters (PAEs), bisphenol A (BPA), triclosan (TCS), and perfluoroalkyl substances (PFASs) have raised attention due to their adverse effects on biological systems. While China's 14th Five-Year Plan (2021–2025) for national economic and social development included the treatment of emerging pollutants, including EDCs, there are currently no national appraisal standards or regulatory frameworks for EDCs and their mixtures. Addressing the risk of EDC mixtures is an urgent matter that needs consideration from China's perspective in the near future. In this Perspective, we delve into the link between EDC mixture exposure and pregnancy loss in China. Our focus areas include establishing a comprehensive national plan targeting reproductive-aged women across diverse urban and rural areas, understanding common EDC combinations in women and their surrounding environment, exploring the relationship between EDCs and pregnancy loss via epidemiology, and reconsidering the safety of EDCs, particularly in mixtures and low-dose scenarios. We envision that this study could aid in creating preventive strategies and interventions to alleviate potential risks induced by EDC exposure during pregnancy in China.

当前,由于女性生育率持续走低,世界上许多国家和地区都面临着人口增长下降的挑战。2017 年以来,中国的出生率创下历史新低并持续下降,目前死亡率已与出生率持平。人们开始关注环境污染物对生殖健康的潜在影响,包括妊娠损失。邻苯二甲酸酯(PAEs)、双酚 A(BPA)、三氯生(TCS)和全氟烷基物质(PFASs)等干扰内分泌的化学品(EDCs)因其对生物系统的不利影响而备受关注。虽然《中国国民经济和社会发展第十四个五年规划纲要(2021-2025 年)》包括了对包括 EDCs 在内的新兴污染物的治理,但目前还没有针对 EDCs 及其混合物的国家评估标准或监管框架。从中国的角度来看,应对 EDC 混合物的风险是近期亟需考虑的问题。在本《视角》中,我们将深入探讨EDC混合物暴露与中国妊娠损失之间的联系。我们关注的重点领域包括:针对不同城市和农村地区的育龄妇女制定全面的国家计划;了解妇女及其周围环境中常见的 EDC 组合;通过流行病学探讨 EDC 与妊娠损失之间的关系;重新考虑 EDC 的安全性,尤其是在混合物和低剂量情况下。我们希望这项研究能有助于制定预防策略和干预措施,以减轻中国妇女在怀孕期间因接触 EDC 而导致的潜在风险。
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引用次数: 0
Effects of transient flow conditions on colloid-facilitated release of decabromodiphenyl ether: Implications for contaminant mobility at e-waste recycling sites 瞬态流动条件对胶体促进的十溴二苯醚释放的影响:对电子废物回收场污染物流动性的影响
Pub Date : 2024-03-26 DOI: 10.1016/j.eehl.2024.03.002

Polybrominated diphenyl ethers (PBDEs) are ubiquitous contaminants, especially in the soil and groundwater of contaminated sites and landfills. Notably, 2,2′,3,3′,4,4′,5,5′,6,6′-decabromodiphenyl ether (BDE-209), one of the most frequently and abundantly detected PBDE congeners in the environment, has recently been designated as a new pollutant subject to rigorous control in China. Colloid-facilitated transport is a key mechanism for the release of PBDEs from surface soils and their migration in the aquifer, but the effects of hydrodynamic conditions, particularly transient flow, on colloid-facilitated release of PBDEs are not well understood. Herein, we examined the effects of typical transient flow conditions on the release characteristics of colloids and BDE-209 from surface soil collected from an e-waste recycling site by undisturbed soil core leaching tests involving multiple dry–wet cycles (with different drying durations) and freeze–thaw cycles. We observed significant positive correlations between BDE-209 and colloid concentrations in the leachate in both the dry–wet and freeze–thaw leaching experiments, highlighting the critical role of colloids in facilitating BDE-209 release. However, colloids mobilized during the dry–wet cycles contained higher contents of BDE-209 than those in the freeze–thaw cycle tests, and the difference was primarily due to the more intensive disintegration of soil aggregates and elution of newly formed inorganic colloidal particles (mainly primary silicate minerals such as quartz and albite) with low BDE-209 content during the freeze–thaw process. These findings underscore the necessity of considering transient flow conditions when assessing the fate and risks of PBDEs at contaminated sites.

多溴联苯醚(PBDEs)是一种无处不在的污染物,尤其是在受污染场地和垃圾填埋场的土壤和地下水中。值得注意的是,2,2′,3,3′,4,4′,5,5′,6,6′-十溴二苯醚(BDE-209)是环境中最常见、最大量检测到的多溴联苯醚同系物之一,最近已被中国指定为受严格控制的新污染物。胶体促进迁移是多溴联苯醚从表层土壤中释放并在含水层中迁移的一个关键机制,但人们对水动力条件(尤其是瞬时流动)对胶体促进多溴联苯醚释放的影响还不甚了解。在此,我们通过涉及多次干湿循环(不同的干燥持续时间)和冻融循环的未扰动土壤核心浸出试验,研究了典型的瞬态流动条件对从电子废物回收场地收集的表层土壤中的胶体和 BDE-209 释放特性的影响。在干湿浸出和冻融浸出实验中,我们观察到 BDE-209 与浸出液中的胶体浓度之间存在明显的正相关关系,这突出表明了胶体在促进 BDE-209 释放方面的关键作用。然而,在干湿循环试验中迁移的胶体比在冻融循环试验中迁移的胶体含有更高的 BDE-209 含量,造成这种差异的主要原因是,在冻融过程中,土壤团聚体的解体更加剧烈,新形成的无机胶体颗粒(主要是原生硅酸盐矿物,如石英和白云石)被洗脱,其 BDE-209 含量较低。这些发现强调了在评估受污染场地多溴联苯醚的归宿和风险时考虑瞬态流动条件的必要性。
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引用次数: 0
Soil metabolomics: Deciphering underground metabolic webs in terrestrial ecosystems 土壤代谢组学:解密陆地生态系统的地下代谢网
Pub Date : 2024-03-20 DOI: 10.1016/j.eehl.2024.03.001
Yang Song , Shi Yao , Xiaona Li , Tao Wang , Xin Jiang , Nanthi Bolan , Charles R. Warren , Trent R. Northen , Scott X. Chang

Soil metabolomics is an emerging approach for profiling diverse small molecule metabolites, i.e., metabolomes, in the soil. Soil metabolites, including fatty acids, amino acids, lipids, organic acids, sugars, and volatile organic compounds, often contain essential nutrients such as nitrogen, phosphorus, and sulfur and are directly linked to soil biogeochemical cycles driven by soil microorganisms. This paper presents an overview of methods for analyzing soil metabolites and the state-of-the-art of soil metabolomics in relation to soil nutrient cycling. We describe important applications of metabolomics in studying soil carbon cycling and sequestration, and the response of soil organic pools to changing environmental conditions. This includes using metabolomics to provide new insights into the close relationships between soil microbiome and metabolome, as well as responses of soil metabolome to plant and environmental stresses such as soil contamination. We also highlight the advantage of using soil metabolomics to study the biogeochemical cycles of elements and suggest that future research needs to better understand factors driving soil function and health.

土壤代谢组学是分析土壤中各种小分子代谢物(即代谢组)的一种新兴方法。土壤代谢物包括脂肪酸、氨基酸、脂类、有机酸、糖类和挥发性有机化合物,通常含有氮、磷和硫等必需营养元素,与土壤微生物驱动的土壤生物地球化学循环直接相关。本文概述了分析土壤代谢物的方法以及与土壤养分循环相关的土壤代谢组学的最新进展。我们介绍了代谢组学在研究土壤碳循环和固碳以及土壤有机库对环境条件变化的响应方面的重要应用。这包括利用代谢组学对土壤微生物组和代谢组之间的密切关系,以及土壤代谢组对植物和环境压力(如土壤污染)的反应提供新的见解。我们还强调了利用土壤代谢组学研究元素生物地球化学循环的优势,并建议未来的研究需要更好地理解驱动土壤功能和健康的因素。
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引用次数: 0
Determining soil conservation strategies: Ecological risk thresholds of arsenic and the influence of soil properties 确定土壤保护战略:砷(As)的生态风险阈值和土壤特性的影响
Pub Date : 2024-03-12 DOI: 10.1016/j.eehl.2024.02.007
Yihang Huang , Naichi Zhang , Zixuan Ge , Chen Lv , Linfang Zhu , Changfeng Ding , Cun Liu , Peiqin Peng , Tongliang Wu , Yujun Wang

The establishment of ecological risk thresholds for arsenic (As) plays a pivotal role in developing soil conservation strategies. However, despite many studies regarding the toxicological profile of As, such thresholds varying by diverse soil properties have rarely been established. This study aims to address this gap by compiling and critically examining an extensive dataset of As toxicity data sourced from existing literature. Furthermore, to augment the existing information, experimental studies on As toxicity focusing on barley-root elongation were carried out across various soil types. The As concentrations varied from 12.01 to 437.25 mg/kg for the effective concentrations that inhibited 10% of barley-root growth (EC10). The present study applied a machine-learning approach to investigate the complex associations between the toxicity thresholds of As and diverse soil properties. The results revealed that Mn-/Fe-ox and clay content emerged as the most influential factors in predicting the EC10 contribution. Additionally, by using a species sensitivity distribution model and toxicity data from 21 different species, the hazardous concentration for x% of species (HCx) was calculated for four representative soil scenarios. The HC5 values for acidic, neutral, alkaline, and alkaline calcareous soils were 80, 47, 40, and 28 mg/kg, respectively. This study establishes an evidence-based methodology for deriving soil-specific guidance concerning As toxicity thresholds.

砷(As)生态风险阈值的确定在制定土壤保护战略中起着至关重要的作用。然而,尽管对砷的毒理学特征进行了许多研究,但却很少建立因不同土壤特性而异的阈值。本研究旨在通过汇编和批判性地检查从现有文献中获取的大量砷毒性数据集来填补这一空白。此外,为了扩充现有信息,还在不同类型的土壤中开展了以大麦根伸长为重点的砷毒性实验研究。抑制大麦根系生长 10% 的有效浓度(EC10)为 12.01 至 437.25 mg/kg。本研究采用机器学习方法研究了砷的毒性阈值与不同土壤特性之间的复杂关联。结果显示,Mn-/Fe-ox 和粘土含量是预测 EC10 贡献值的最有影响力的因素。此外,利用物种敏感性分布模型和 21 种不同物种的毒性数据,计算了四种代表性土壤情况下 x% 物种的有害浓度(HCx)。酸性、中性、碱性和碱性石灰性土壤的 HC5 值分别为 80、47、40 和 28 毫克/千克。这项研究确立了一种基于证据的方法,用于得出针对特定土壤的砷毒性阈值指南。
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Eco-Environment & Health
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