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Metal-organic-framework and walnut shell biochar composites for lead and hexavalent chromium removal from aqueous environments 金属有机框架和核桃壳生物炭复合材料用于去除水环境中的铅和六价铬。
IF 8.1 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143572
Suraj Venkat Pochampally , Emma Letourneau , Ismail Abdulraheem , Joshua Monk , Douglas Sims , Simona E. Hunyadi Murph , Erica J. Marti , Jaeyun Moon
Extensive research in recent years has explored the realm of porous carbon composites for various applications, including electrochemistry, structural materials, environmental remediation, and more. In particular, the fabrication of porous carbon composites using a metal-organic framework (MOF) and biochar (BC) for aqueous remediation is a fairly new avenue of research. In this study, a MOF-BC composite was synthesized with unmodified and chemically modified BCs using solvothermal synthesis. The composites were used as adsorbents to remediate heavy metals, such as lead (II) and chromium (VI), from aqueous environments. It was verified that the MOF was homogeneously deposited onto the BC's surface using various material characterization techniques. Lead and chromium adsorption studies revealed a high adsorption capacity with greater than 99% removal for lead and ∼65% for chromium, respectively. Impressively, for lead, the highest observed experimental adsorption capacity of the MOF-chemically modified BC composite was 535 mg/g, compared to 240 mg/g for pristine BC. Meanwhile, the adsorption capacity of the same MOF-BC composite for chromium ions was low at 18 mg/g, compared to 80 mg/g for the chemically modified BC. The MOF-BC had a rapid adsorption rate, achieving equilibrium at only 150 min of reaction time for lead ions. MOF-BCs have higher adsorption for cationic lead through physisorption and ion-exchange mechanisms, whereas, for anionic chromium, removal is dominated only by physisorption mechanisms. The outcomes and methodological developments attained in this study offer a novel and compelling approach for synthesizing MOF-BC composites for aqueous remediation applications.
近年来的大量研究探索了多孔碳复合材料的各种应用领域,包括电化学、结构材料、环境修复等。其中,利用金属有机框架(MOF)和生物炭(BC)制造多孔碳复合材料用于水体修复是一个相当新的研究方向。本研究采用溶热合成法合成了一种 MOF-BC 复合材料,其中包括未改性和化学改性的生物炭。该复合材料被用作吸附剂,以去除水环境中的铅(II)和铬(VI)等重金属。利用各种材料表征技术验证了 MOF 在 BC 表面的均匀沉积。铅和铬的吸附研究表明,MOF 具有很高的吸附能力,对铅和铬的去除率分别超过 99% 和 65%。令人印象深刻的是,对于铅,MOF-化学修饰 BC 复合材料的最高实验吸附容量为 535 mg/g,而原始 BC 为 240 mg/g。同时,同一种 MOF-BC 复合材料对铬离子的吸附容量较低,仅为 18 毫克/克,而化学修饰 BC 的吸附容量为 80 毫克/克。MOF-BC 的吸附速度很快,对铅离子的吸附仅在 150 分钟的反应时间内就达到了平衡。MOF-BC 通过物理吸附和离子交换机制对阳离子铅具有较高的吸附能力,而对阴离子铬的去除仅以物理吸附机制为主。本研究的成果和方法论的发展为合成 MOF-BC 复合材料用于水体修复应用提供了一种新颖而有吸引力的方法。
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引用次数: 0
Biomonitoring emerging hazards of pharmaceuticals in river water using gut microbiome and behavioural Daphnia magna responses 利用肠道微生物组和大型水蚤的行为反应对河水中新出现的药物危害进行生物监测。
IF 8.1 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143612
Hugo Moro , Raquel Vaya , Marta Casado , Benjamín Piña , Pol Domínguez-García , Cristian Gómez-Canela , Carlos Barata
A cost-effective Daphnia magna testing framework was applied to identify emerging hazards such as neurological and cardiovascular defects as well as antibiotic resistant genes (ARGs), related to pharmaceuticals present in waste water treated (WWTP) effluent discharged into rivers. D. magna juveniles were exposed during 48 h to water samples from three rivers in the vicinity of Barcelona (NE Spain), Besós, Llobregat and Onyar, upstream and downstream of WWTP discharging points. The analyses included measuring levels of 80 pharmaceutical residues in water samples by HPLC-MS, determination of the loads of different clinically relevant antibiotic resistant genes (ARGs) in both water samples and exposed animals, and assessment of toxic effects in feeding, heartbeat responses, and behavioural indicators. ARG prevalence in water, but not in gut microbiomes, was associated with the presence of bactericides in water. These results suggest that their levels were high enough to put a selective pressure over river microbial populations, but that Daphnia guts were not easily populated by environmental bacteria. Toxic effects were found in 20–43% of water samples, depending on the river, and related to water quality parameters and to pollutant levels. For example, heartbeats were correlated with salinity, whereas feeding impairment did so with high loads of suspended solids. In contrast, behavioural alterations were associated to the concentration of neuroactive chemicals. Accordingly, we hypothesize that measured neuroactive chemicals have caused the observed effects. If this also applies to local invertebrate populations, the environmental consequences may be severe and unpredictable.
我们采用了一种经济有效的大型蚤测试框架,以确定新出现的危害,如神经和心血管缺陷以及抗生素耐药基因(ARGs),这些危害与排入河流的废水处理(WWTP)污水中的药物有关。在巴塞罗那(西班牙东北部)附近的三条河流(Besós、Llobregat 和 Onyar),即污水处理厂排放点的上游和下游,将 D. magna 幼鱼暴露在水样中 48 小时。分析包括通过 HPLC-MS 测定水样中 80 种药物残留物的含量,测定水样和暴露动物体内不同临床相关抗生素耐药基因 (ARG) 的载量,以及评估摄食、心跳反应和行为指标的毒性效应。水中的 ARG 流行率与水中杀菌剂的存在有关,而肠道微生物组中的 ARG 流行率与杀菌剂的存在无关。这些结果表明,杀菌剂的含量高到足以对河流微生物种群产生选择性压力,但水蚤的肠道不容易被环境细菌填充。在 20% 至 43% 的水样中发现了毒性效应,这取决于河流,并与水质参数和污染物水平有关。例如,心跳与盐度有关,而摄食障碍则与高悬浮固体负荷有关。相反,行为改变与神经活性化学物质的浓度有关。因此,我们推测,测量到的神经活性化学物质造成了观察到的影响。如果这也适用于当地的无脊椎动物种群,那么环境后果可能是严重和不可预测的。
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引用次数: 0
Comparative cytotoxicity and mitochondrial disruption in H9c2 cardiomyocytes induced by common pesticides 常见杀虫剂诱导的 H9c2 心肌细胞的细胞毒性和线粒体破坏比较
IF 8.1 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143627
Yuqing Ma, Qiao Tao, Lei Huang, Qiangwei Wang
Chronic exposure to pesticides is believed to be associated with various human diseases, including cardiovascular diseases. However, the mechanisms by which pesticides lead to cardiovascular diseases remain unclear. In our study, we selected the following commonly used pesticides as typical examples: the herbicides glyphosate (GLY) and glufosinate ammonium (GLA); the insecticides imidacloprid (IMI) and thiamethoxam (THM); and the fungicides pyraclostrobin (PYR) and azoxystrobin (AZO). We employed H9c2 cells as a model to investigate the cytotoxic effects of these pesticides on myocardial cells at concentrations of 1, 10, 100, and 1000 mg/L. The results indicate that these pesticides can affect cell viability, alter the cell cycle, and significantly impact ATP content and mitochondrial complex levels, ultimately triggering oxidative stress responses in the cells. However, compared to herbicides GLY and GLA, insecticides IMI and THM, and fungicides PYR and AZO pesticides are more toxic to H9c2 cells. Additionally, GLY, GLA, IMI, THM, PYR, and AZO were found to cause structural changes in the mitochondria of H9c2 cells. Molecular docking results suggest that these pesticides can bind to proteins related to mitochondrial dynamics. Furthermore, IMI, THM, PYR, and AZO exhibit stronger binding abilities to mitochondrial dynamics-related proteins. These findings indicate that these pesticides significantly adverse effects on myocardial cells, mainly by causing mitochondrial dysfunction and inducing oxidative stress. Our findings highlight the importance of considering the differential toxicity of various classes of pesticides when assessing their risks to human health, particularly concerning cardiovascular diseases.
长期接触杀虫剂被认为与包括心血管疾病在内的各种人类疾病有关。然而,农药导致心血管疾病的机制仍不清楚。在我们的研究中,我们选择了以下常用农药作为典型例子:除草剂草甘膦(GLY)和草胺膦(GLA);杀虫剂吡虫啉(IMI)和噻虫嗪(THM);以及杀菌剂吡唑醚菌酯(PYR)和唑啉草酯(AZO)。我们以 H9c2 细胞为模型,研究了这些农药在 1、10、100 和 1000 毫克/升浓度下对心肌细胞的细胞毒性作用。结果表明,这些农药会影响细胞活力,改变细胞周期,并显著影响 ATP 含量和线粒体复合物水平,最终引发细胞氧化应激反应。然而,与除草剂 GLY 和 GLA 相比,杀虫剂 IMI 和 THM 以及杀菌剂 PYR 和 AZO 对 H9c2 细胞的毒性更大。此外,研究还发现 GLY、GLA、IMI、THM、PYR 和 AZO 会导致 H9c2 细胞线粒体结构发生变化。分子对接结果表明,这些农药可与线粒体动力学相关的蛋白质结合。此外,IMI、THM、PYR 和 AZO 与线粒体动力学相关蛋白的结合能力更强。这些研究结果表明,这些农药对心肌细胞有显著的不利影响,主要是通过导致线粒体功能障碍和诱导氧化应激。我们的研究结果突显了在评估各类农药对人类健康的风险时,考虑其不同毒性的重要性,尤其是在心血管疾病方面。
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引用次数: 0
Glyphosate application may influence the transfer of trace elements from soils to both soil solutions and plants 施用草甘膦可能会影响微量元素从土壤向土壤溶液和植物的转移。
IF 8.1 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143603
Nathan Bemelmans, Rosalie Dejardin, Bryan Arbalestrie, Yannick Agnan
Trace element dynamics in the soil-plant system depends on multiple parameters, including chelating organic compounds from natural or synthetic organic matters. In this study, we evaluated the influence of one of the most common pesticides—glyphosate—on the mobility of trace elements considering contrasted soils (uncontaminated, anthropogenically contaminated, and naturally-enriched) in a greenhouse experiment. Four modalities have been tested: one control without any application, two with different glyphosate doses (1 and 3 times the authorised field dose), and one with compost addition to evaluate its potential ability to mitigate the impact of glyphosate on trace element mobility. Both, trace element and glyphosate concentrations were measured in the soil solutions and trace element contents were determined in plants at the end of the experiment. The results showed that, although glyphosate concentrations rapidly decreased in soil solutions, glyphosate application still influenced the transfer of trace elements to both soil solution (up to 12-times higher) and plant (up to 5.2-times higher). This influence was highly dependent on both the specific elements and the type of soils considered. For instance, in uncontaminated soils, glyphosate especially increased the mobilization of Mn, Co, Zn, Mo, and Pb to soil solution. This effect diminished of 2.5 times on average with increasing soil contamination. A similar trend was observed for the transfer of trace elements from soil to plant (i.e., on average 2.2-times lower in the most contaminated compared to the uncontaminated soil). However, in the naturally-enriched soil, opposing trends were noticed between soil solution and plant. The impact of compost addition on the transfer of trace elements to plants remains unclear: compost enhanced the transfer of trace elements to soil solution in uncontaminated and naturally-enriched soils likely due to trace element input through the compost, but decreased the transfer in anthropogenically-contaminated soils likely due to adsorption processes. Therefore, glyphosate could potentially increase the exposure of trace elements through food consumption and their transfer to the ecosystem, particularly in uncontaminated and weakly contaminated soils. In highly contaminated soils, compost could mitigate the glyphosate-induced enhancement of trace element mobility to soil solution.
土壤-植物系统中微量元素的动态取决于多个参数,包括来自天然或合成有机物的螯合有机化合物。在这项研究中,我们在温室实验中评估了最常见的农药之一草甘膦对微量元素流动性的影响,并考虑了对比土壤(未受污染、人为污染和天然富集土壤)。试验采用了四种模式:一种是不施用草甘膦的对照组,两种是施用不同剂量草甘膦的对照组(分别为田间授权剂量的 1 倍和 3 倍),一种是添加堆肥的对照组,以评估堆肥减轻草甘膦对微量元素迁移率影响的潜在能力。在土壤溶液中测量了微量元素和草甘膦的浓度,并在实验结束时测定了植物中的微量元素含量。结果表明,虽然草甘膦在土壤溶液中的浓度迅速下降,但草甘膦的施用仍然影响了微量元素向土壤溶液和植物的转移(分别增加了 12 倍和 5.2 倍)。这种影响在很大程度上取决于所考虑的特定元素和土壤类型。例如,在未受污染的土壤中,草甘膦尤其会增加土壤溶液中锰、钴、锌、钼和铅的移动。随着土壤污染程度的增加,这种效应平均降低了 2.5 倍。微量元素从土壤向植物的转移也呈现出类似的趋势(即与未受污染的土壤相比,受污染最严重的土壤中的微量元素平均减少了 2.2 倍)。然而,在天然富集土壤中,土壤溶液和植物之间的转移趋势相反。堆肥的添加对微量元素向植物转移的影响尚不清楚:在未受污染和天然富集的土壤中,堆肥增强了微量元素向土壤溶液的转移,这可能是由于通过堆肥输入了微量元素,但在人为污染的土壤中,堆肥减少了微量元素向土壤溶液的转移,这可能是由于吸附过程。因此,草甘膦可能会通过食物摄入增加微量元素的暴露量,并将其转移到生态系统中,特别是在未受污染和受轻度污染的土壤中。在高度污染的土壤中,堆肥可以减轻草甘膦引起的微量元素在土壤溶液中流动性的增强。
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引用次数: 0
Transgenerational response of glucose metabolism in Caenorhabditis elegans exposed to 6-PPD quinone 暴露于 6-PPD 醌的秀丽隐杆线虫葡萄糖代谢的代际反应。
IF 8.1 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143653
Zhenjun Liu , Yunhui Li , Dayong Wang
In Caenorhabditis elegans, 6-PPD quinine (6-PPDQ) could cause several aspects of toxicity together with alteration in glucose metabolism. However, transgenerational alteration in glucose metabolism remains still unknown after 6-PPDQ exposure. In the current study, we further observed transgenerational increase in glucose content induced by 6-PPDQ (1–10 μg/L). After 1–10 μg/L 6-PPDQ exposure, although expressions of genes controlling gluconeogenesis were not changed in the offspring, expressions of hxk-1, hxk-3, pyk-1, and pyk-2 controlling glycolysis could be decreased in the offspring. Meanwhile, transgenerational decrease in expressions of daf-16 encoding FOXO transcriptional factor and aak-2 encoding AMPK was detected in the offspring of 6-PPDQ (1–10 μg/L) exposed nematodes. RNAi of daf-16 and aak-2 led to more severe transgenerational increase in glucose content and reduction in expressions of hxk-1 and hxk-3 induced by 6-PPDQ. Moreover, RNAi of daf-16, aak-2, hxk-1, hxk-3, pyk-1, and pyk-2 caused susceptibility to transgenerational 6-PPDQ toxicity on locomotion and reproduction. Additionally, 6-PPDQ induced activation of SOD-3 and HSP-6 reflecting anti-oxidation and mitochondrial UPR responses could be inhibited by RNAi of daf-16, aak-2, hxk-1, hxk-3, pyk-1, and pyk-2. Therefore, exposure to 6-PPDQ potentially resulted in transgenerational alteration in glucose metabolism, which provided the possible link to induction of transgenerational 6-PPDQ toxicity in organisms.
在秀丽隐杆线虫体内,6-PPD 奎宁(6-PPDQ)可导致多方面的毒性,同时改变葡萄糖代谢。然而,6-PPDQ 暴露后葡萄糖代谢的跨代改变仍是一个未知数。在本研究中,我们进一步观察了 6-PPDQ(1-10 μg/L)诱导的葡萄糖含量的代际增加。在暴露于 1-10 μg/L 6-PPDQ 后,虽然控制葡萄糖生成的基因在后代中的表达没有变化,但控制糖酵解的 hxk-1、hxk-3、pyk-1 和 pyk-2 在后代中的表达可能会降低。同时,在暴露于 6-PPDQ(1-10 μg/L)的线虫后代中,发现编码 FOXO 转录因子的 daf-16 和编码 AMPK 的 aak-2 的表达量出现了转代性下降。对 daf-16 和 aak-2 进行 RNAi 后,6-PPDQ 诱导的葡萄糖含量和 hxk-1 和 hxk-3 的表达量会出现更严重的转代增加。此外,daf-16、aak-2、hxk-1、hxk-3、pyk-1 和 pyk-2 的 RNAi 会导致 6-PPDQ 对运动和繁殖的转代毒性。此外,通过对daf-16、aak-2、hxk-1、hxk-3、pyk-1和pyk-2进行RNAi,可降低6-PPDQ诱导的SOD-3和HSP-6的活化,这反映了抗氧化和线粒体UPR反应。因此,暴露于 6-PPDQ 可能会导致葡萄糖代谢的跨代改变,这为诱导生物体内 6-PPDQ 的跨代毒性提供了可能的联系。
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引用次数: 0
Spatial associations of daily PM2.5 concentration with cardiovascular and pulmonary morbidity in Korea 韩国每日 PM2.5 浓度与心血管和肺部发病率的空间关联。
IF 8.1 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143669
Dajeong Ham , Hyun-Joo Bae , Soontae Kim , Hyungryul Lim , Jonghyuk Choi , Ho-Jang Kwon , Sanghyuk Bae
Air pollution, particularly fine particulate matter less than 2.5 μm in diameter (PM2.5), contributes to respiratory and cardiovascular diseases and poses significant public health risks worldwide. This study evaluated the short-term effects of PM2.5 on hospital admissions for cardiovascular and respiratory diseases, with additional analyses to identify vulnerable populations based on regional characteristics.
The present study analyzed data from 249 Korean communities between 2006 and 2021. Data on daily hospital admissions for cardiovascular and respiratory diseases were obtained from the National Health Insurance Service. Data on PM2.5 concentrations were sourced from air quality modeling. Additional data on regional characteristics, including the regional deprivation index, proportion of elderly residents, education levels, and greenness levels, were also collected. We used case time series analysis to assess the associations between PM2.5 concentrations and hospital admissions for cardiovascular and respiratory diseases and explored effect modification by regional characteristics with stratified analyses.
The mean numbers of daily cardiovascular admissions and respiratory admissions were 5.68 ± 5.46 and 6.46 ± 8.03, respectively. The mean PM2.5 concentrations were 23.58 ± 13.66 μg/m3. A10 μg/m³ increment in daily PM2.5 concentration was associated with increase of cardiovascular and respiratory hospitalization by 0.94% (95% CI: 0.84%, 1.04%) and 1.43% (95% CI: 1.34%, 1.52%), respectively. Regional characteristics analysis showed significant disparities, with higher risks for hospital admissions in areas with lower deprivation and low greenness.
This study highlights the significant short-term health impacts of PM2.5 on respiratory and cardiovascular hospital admissions in Korean communities. The findings underscore the critical role of regional and demographic factors in modulating these effects, identifying socio-economic areas, age structure of the population, lower education levels, and low greenness as key vulnerability factors.
空气污染,尤其是直径小于 2.5 微米的细颗粒物(PM2.5)会导致呼吸系统和心血管疾病,并在全球范围内构成重大公共健康风险。本研究评估了 PM2.5 对心血管和呼吸系统疾病入院率的短期影响,并根据地区特征进行了额外分析,以确定易感人群。本研究分析了韩国 249 个社区在 2006 年至 2021 年期间的数据。每天因心血管和呼吸系统疾病入院的数据来自国民健康保险服务。PM2.5 浓度数据来自空气质量模型。我们还收集了有关地区特征的其他数据,包括地区贫困指数、老年居民比例、教育水平和绿化水平。我们使用病例时间序列分析法评估了 PM2.5 浓度与心血管疾病和呼吸系统疾病入院人数之间的关联,并通过分层分析探讨了区域特征对效果的影响。每天因心血管疾病和呼吸系统疾病入院的平均人数分别为 5.68 ± 5.46 和 6.46 ± 8.03。PM2.5 的平均浓度为 23.58 ± 13.66 μg/m3。PM2.5日浓度每增加10微克/立方米,心血管和呼吸系统住院率分别增加0.94%(95% CI:0.84%,1.04%)和1.43%(95% CI:1.34%,1.52%)。地区特征分析表明,在贫困程度较低和绿化程度较低的地区,入院风险较高。这项研究强调了 PM2.5 对韩国社区呼吸道和心血管疾病入院率的重大短期健康影响。研究结果强调了地区和人口因素在调节这些影响方面的关键作用,指出社会经济地区、人口年龄结构、较低的教育水平和低绿化率是关键的脆弱性因素。
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引用次数: 0
Microbiome divergence across four major Indian riverine water ecosystems impacted by anthropogenic contamination: A comparative metagenomic analysis 受人为污染影响的印度四大河流水生态系统的微生物组差异:元基因组对比分析
IF 8.1 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143672
Raj Kumar Regar , Mohan Kamthan , Vivek Kumar Gaur , Satyendra Pratap Singh , Seema Mishra , Sanjay Dwivedi , Aradhana Mishra , Natesan Manickam , Chandra Shekhar Nautiyal
Rivers are critical ecosystems that support biodiversity and local livelihoods. This study aimed to evaluate the effects of metal contamination and anthropogenic activities on microbial and phage community dynamics within major Indian river ecosystems, focusing on the Ganga, Narmada, Cauvery, and Gomti rivers -using metagenomic techniques, Biolog, and ICP-MS analysis. Significant variations in microbial communities were observed both within each river and across the four systems, influenced by ecological factors like geography and hydrology, as well as anthropogenic pressures. Downstream sites consistently exhibited higher microbial diversity, with prevalence of Acidobacteria, Actinobacteria, Verrucomicrobia, Firmicutes, and Nitrospirae dominating, while Proteobacteria and Bacteroides declined. The Ganga River showed a higher abundance of bacteriophages compared to other rivers, which gradually reduced with the increment of anthropogenic impact. Functional gene analysis revealed correlations between carbon utilization and metal resistance in contaminated sites. ICP-MS analysis indicates elevated chromium and lead levels in downstream sites of all rivers compared to upstream sites. Interestingly, pristine upstream sites in the Ganga had higher trace element levels than those in Narmada and Cauvery, likely due to its Himalayan origin. Both the Ganga and Cauvery rivers contained numerous metal resistance genes. The Alaknanda was identified as the primary source of microbial communities, bacteriophages, trace elements, and heavy metals in the Ganga. These findings offer new insights into anthropogenic influences on river microbial dynamics and highlight the need for targeted monitoring and management strategies to preserve river health.
河流是支持生物多样性和当地生计的重要生态系统。本研究旨在评估金属污染和人类活动对印度主要河流生态系统中微生物和噬菌体群落动态的影响,重点关注恒河(Ganga)、纳尔马达河(Narmada)、考弗里河(Cauvery)和戈姆蒂河(Gomti),采用了元基因组学技术、Biolog 和 ICP-MS 分析方法。受地理和水文等生态因素以及人为压力的影响,每条河流内部以及四个系统之间的微生物群落都存在显著差异。下游地点一直表现出较高的微生物多样性,其中以酸性杆菌、放线菌、蛭弧菌、固着菌和硝化菌为主,而变形菌和乳酸菌则有所减少。与其他河流相比,恒河的噬菌体数量较高,但随着人为影响的增加,噬菌体数量逐渐减少。功能基因分析表明,受污染地区的碳利用和金属抗性之间存在相关性。ICP-MS 分析表明,与上游地点相比,所有河流下游地点的铬和铅含量均有所升高。有趣的是,恒河上游原始地点的微量元素含量高于纳尔马达河和考弗里河,这可能是由于恒河源于喜马拉雅山脉。恒河和考弗里河都含有大量抗金属基因。阿拉克南达河被确定为恒河中微生物群落、噬菌体、微量元素和重金属的主要来源。这些发现为人类活动对河流微生物动态的影响提供了新的见解,并强调了有针对性的监测和管理策略以保护河流健康的必要性。
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引用次数: 0
Mechanistic inferences from empirical and LSER modeling approaches concerning sorption of organic compounds by pristine and aged PE microplastics 从经验和 LSER 建模方法中推断原始和老化聚乙烯微塑料对有机化合物的吸附机理。
IF 8.1 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143695
Elif Yaren Özen , Melek Canbulat Özdemir , Makbule Dilara Hatinoğlu , Onur Güven Apul , İpek İmamoğlu
This study investigates the effect of aging of polyethylene (PE) microplastics (MP) on its interaction with organic compounds (OCs). Initially, pristine PE MPs were subjected to UV-aging, followed by characterization of their chemical structure and thermal properties. UV-aging resulted in formation of new functional groups such as carbonyl (CO), –OH, and unsaturation, along with changes in crystallinity and melting temperature. Complimentary sorption experiments were conducted with a suite of environmentally significant and structurally related OCs i.e., phenol, 2,3,6-trichlorophenol, triclosan, 1,1,2,2-tetrachloroethane, tetrachloroethylene and hexachloroethane, using pristine and UV-aged PE MPs. In addition to the distribution coefficients (i.e., KPEW) obtained experimentally, relevant data from the literature was also gathered for the purpose of developing a poly-parametric linear free energy relationship (pp-LFER) model. Two models were developed for predicting sorption onto: (i) only UV-aged PE, yielding an R2 = 0.96, RMSE = 0.19 (n = 16), (ii) PE that has undergone various types of aging, yielding an R2 = 0.83, RMSE = 0.68 (n = 36). Lastly, a direct comparison was performed between two pp-LFERs developed for the interaction of the same OCs with pristine vs. aged PE (n = 7). In addition to the predictive strength, the system coefficients enabled mechanistic inferences to be made; such that while molecular volume or non-specific hydrophobic interactions govern OC-pristine PE interactions, polar interactions and H-bonding also play important roles for OC-aged PE interactions. Overall, findings suggested that changes of MP surfaces under environmentally relevant aging conditions indicated an impact on their interactions with OCs in the environment.
本研究探讨了聚乙烯(PE)微塑料(MP)老化对其与有机化合物(OC)相互作用的影响。首先对原始聚乙烯微塑料进行紫外线老化,然后对其化学结构和热性能进行表征。紫外线老化会形成新的官能团,如羰基(C=O)、-OH 和不饱和,同时结晶度和熔化温度也会发生变化。使用原始和紫外线老化聚乙烯多孔材料,对一系列对环境有重要影响且结构相关的 OC(即苯酚、2,3,6-三氯苯酚、三氯生、1,1,2,2-四氯乙烷、四氯乙烯和六氯乙烷)进行了辅助吸附实验。除了通过实验获得的分布系数(即 KPEW)外,还收集了文献中的相关数据,以建立多参数线性自由能关系(pp-LFER)模型。建立了两个模型来预测聚乙烯的吸附情况:(i) 仅紫外线老化的聚乙烯,R2=0.96,RMSE=0.19(n=16);(ii) 经过各种老化的聚乙烯,R2=0.83,RMSE=0.68(n=36)。最后,直接比较了针对相同 OC 与原始 PE 和老化 PE 的相互作用而开发的两个 pp-LFER (n=7)。除了预测强度外,系统系数还能进行机理推断;例如,虽然分子体积或非特异性疏水相互作用控制着 OC 与原始 PE 的相互作用,但极性相互作用和 H 键也在 OC 与老化 PE 的相互作用中发挥着重要作用。总之,研究结果表明,在与环境相关的老化条件下,聚乙烯表面的变化会对其与环境中的 OC 的相互作用产生影响。
{"title":"Mechanistic inferences from empirical and LSER modeling approaches concerning sorption of organic compounds by pristine and aged PE microplastics","authors":"Elif Yaren Özen ,&nbsp;Melek Canbulat Özdemir ,&nbsp;Makbule Dilara Hatinoğlu ,&nbsp;Onur Güven Apul ,&nbsp;İpek İmamoğlu","doi":"10.1016/j.chemosphere.2024.143695","DOIUrl":"10.1016/j.chemosphere.2024.143695","url":null,"abstract":"<div><div>This study investigates the effect of aging of polyethylene (PE) microplastics (MP) on its interaction with organic compounds (OCs). Initially, pristine PE MPs were subjected to UV-aging, followed by characterization of their chemical structure and thermal properties. UV-aging resulted in formation of new functional groups such as carbonyl (C<img>O), –OH, and unsaturation, along with changes in crystallinity and melting temperature. Complimentary sorption experiments were conducted with a suite of environmentally significant and structurally related OCs <em>i.e.</em>, phenol, 2,3,6-trichlorophenol, triclosan, 1,1,2,2-tetrachloroethane, tetrachloroethylene and hexachloroethane, using pristine and UV-aged PE MPs. In addition to the distribution coefficients (<em>i.e.</em>, K<sub>PEW</sub>) obtained experimentally, relevant data from the literature was also gathered for the purpose of developing a poly-parametric linear free energy relationship (pp-LFER) model. Two models were developed for predicting sorption onto: (i) only UV-aged PE, yielding an R<sup>2</sup> = 0.96, RMSE = 0.19 (n = 16), (ii) PE that has undergone various types of aging, yielding an R<sup>2</sup> = 0.83, RMSE = 0.68 (n = 36). Lastly, a direct comparison was performed between two pp-LFERs developed for the interaction of the same OCs with pristine <em>vs.</em> aged PE (n = 7). In addition to the predictive strength, the system coefficients enabled mechanistic inferences to be made; such that while molecular volume or non-specific hydrophobic interactions govern OC-pristine PE interactions, polar interactions and H-bonding also play important roles for OC-aged PE interactions. Overall, findings suggested that changes of MP surfaces under environmentally relevant aging conditions indicated an impact on their interactions with OCs in the environment.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"368 ","pages":"Article 143695"},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142607760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Predicting health impacts of wildfire smoke in Amazonas basin, Brazil 预测巴西亚马孙流域野火烟雾对健康的影响。
IF 8.1 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143688
Yara de Souza Tadano , Sanja Potgieter-Vermaak , Hugo Valadares Siqueira , Judith J. Hoelzemann , Ediclê S.F. Duarte , Thiago Antonini Alves , Fabio Valebona , Iuri Lenzi , Ana Flavia L. Godoi , Cybelli Barbosa , Igor O. Ribeiro , Rodrigo A.F. de Souza , Carlos I. Yamamoto , Erickson Santos , Karenn S. Fernandesi , Cristine Machado , Scot T. Martin , Ricardo H.M. Godoi
Worldwide, smoke from forest fires has deleterious health effects. Even so, because of the complexity of fire mechanics, public health authorities face challenges in forecasting and thus mitigating population exposure to smoke. The population in the Amazon basin regularly suffers from fire smoke tied to agriculture and land-use change. The people of Manaus, a city of two million in the center of the basin, suffer the consequences. The study herein evaluates the time lag between fire occurrence and hospital admission for cardiorespiratory illness. Understanding the time lag is key to forecasting and mitigating the public health effects. The study approach is sequential application of four increasingly complex methods of machine learning to examine the relationships among black carbon concentrations, fire count, meteorology, and hospital admissions. The mean absolute percentage error (MAPE) for predicting hospital admissions ranged from 27% to 38%. Furthermore, a one-day lag was observed between the detection of fires and the manifestations of respiratory health hazards. This finding suggests the potential for developing an early warning system, which could enable public health officials to issue advisories or implement preventive actions during the brief period before hospital admissions begin to rise. The findings have applicability not only to the population exposed to fires in the Amazon basin but also to populations where smoke is prevalent, notably increasingly in Australia, southern Europe, the western USA, southern Canada, and southeast Asia.
在全球范围内,森林火灾产生的烟雾会对健康造成有害影响。即便如此,由于火灾机理的复杂性,公共卫生部门在预报和减少人口烟雾暴露方面仍面临挑战。亚马逊流域的居民经常受到与农业和土地使用变化有关的火灾烟雾的影响。位于盆地中心的 200 万人口城市玛瑙斯的居民就深受其害。本研究评估了火灾发生与心肺疾病入院之间的时间差。了解时间差是预测和减轻公共健康影响的关键。研究方法是依次应用四种日益复杂的机器学习方法来检验黑碳浓度、火灾次数、气象和入院人数之间的关系。预测入院人数的平均绝对百分比误差 (MAPE) 为 27% 至 38%。此外,发现火灾与呼吸系统健康危害表现之间存在一天的滞后期。这一发现表明有可能开发出一种预警系统,使公共卫生官员能够在入院人数开始上升之前的短暂时间内发布警告或采取预防措施。这些发现不仅适用于亚马逊流域受火灾影响的人群,也适用于烟雾盛行的人群,尤其是在澳大利亚、欧洲南部、美国西部、加拿大南部和东南亚地区。
{"title":"Predicting health impacts of wildfire smoke in Amazonas basin, Brazil","authors":"Yara de Souza Tadano ,&nbsp;Sanja Potgieter-Vermaak ,&nbsp;Hugo Valadares Siqueira ,&nbsp;Judith J. Hoelzemann ,&nbsp;Ediclê S.F. Duarte ,&nbsp;Thiago Antonini Alves ,&nbsp;Fabio Valebona ,&nbsp;Iuri Lenzi ,&nbsp;Ana Flavia L. Godoi ,&nbsp;Cybelli Barbosa ,&nbsp;Igor O. Ribeiro ,&nbsp;Rodrigo A.F. de Souza ,&nbsp;Carlos I. Yamamoto ,&nbsp;Erickson Santos ,&nbsp;Karenn S. Fernandesi ,&nbsp;Cristine Machado ,&nbsp;Scot T. Martin ,&nbsp;Ricardo H.M. Godoi","doi":"10.1016/j.chemosphere.2024.143688","DOIUrl":"10.1016/j.chemosphere.2024.143688","url":null,"abstract":"<div><div>Worldwide, smoke from forest fires has deleterious health effects. Even so, because of the complexity of fire mechanics, public health authorities face challenges in forecasting and thus mitigating population exposure to smoke. The population in the Amazon basin regularly suffers from fire smoke tied to agriculture and land-use change. The people of Manaus, a city of two million in the center of the basin, suffer the consequences. The study herein evaluates the time lag between fire occurrence and hospital admission for cardiorespiratory illness. Understanding the time lag is key to forecasting and mitigating the public health effects. The study approach is sequential application of four increasingly complex methods of machine learning to examine the relationships among black carbon concentrations, fire count, meteorology, and hospital admissions. The mean absolute percentage error (MAPE) for predicting hospital admissions ranged from 27% to 38%. Furthermore, a one-day lag was observed between the detection of fires and the manifestations of respiratory health hazards. This finding suggests the potential for developing an early warning system, which could enable public health officials to issue advisories or implement preventive actions during the brief period before hospital admissions begin to rise. The findings have applicability not only to the population exposed to fires in the Amazon basin but also to populations where smoke is prevalent, notably increasingly in Australia, southern Europe, the western USA, southern Canada, and southeast Asia.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"367 ","pages":"Article 143688"},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142607763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Direct aqueous injection LC−ESI-MS/MS analysis for the determination of 23 EU watch list substances in whole water samples 直接水溶液进样 LC-ESI-MS/MS 分析法测定整个水样中的 23 种欧盟观察清单物质。
IF 8.1 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143703
Alena Bednáriková, Peter Tölgyessy
The Watch List (WL) monitoring program in the European Union (EU) aims to identify and prioritize emerging pollutants in the aquatic environment that may pose risks to human health and the environment. Thus, reliable methods are needed to determine these substances. This study presents the development of a simple, fast, and green method for analysing 23 WL substances (4 antibiotics, 9 azole compounds, 6 other pesticides, and 4 sunscreens), covering a range of medium to very low polarity (log Kow 2.2–6.9), in whole environmental water samples using direct aqueous injection (DAI) in combination with liquid chromatography–electrospray ionization tandem mass spectrometry (LC–ESI-MS/MS). To process the samples, 0.5 mL of acetonitrile is added to 1 mL of raw water, followed by brief shaking. The mixture is then centrifuged to remove sedimented suspended solids before being injected into the LC instrument. A rigorous analytical greenness metric for sample preparation (AGREEprep) assigned this procedure a green score of 0.61. The method showed satisfactory performance characteristics for all analytes under investigation, including limits of quantification meeting the WL requirements, recoveries in the range of 79–120%, and intra-day precision with relative standard deviations in the range of 1.9–20%. The method is suitable for screening and monitoring purposes, as confirmed by the analysis of real samples.
欧盟(EU)的观察清单(WL)监测计划旨在识别水生环境中可能对人类健康和环境造成危害的新出现的污染物,并对其进行优先排序。因此,需要可靠的方法来确定这些物质。本研究采用水直接进样(DAI)结合液相色谱-电喷雾串联质谱(LC-ESI-MS/MS)的方法,对整个环境水样中的 23 种 WL 物质(4 种抗生素、9 种唑类化合物、6 种其他杀虫剂和 4 种防晒剂)进行了简单、快速和绿色的分析,这些物质的极性范围从中等到极低不等(log Kow 2.2-6.9)。处理样品时,将 0.5 毫升乙腈加入 1 毫升原水中,然后短暂振荡。然后将混合物离心,去除沉淀的悬浮固体,再注入液相色谱仪。严格的样品制备分析绿色度量标准(AGREEprep)为这一程序打出了 0.61 的绿色分数。该方法对所有待测分析物均显示出令人满意的性能特征,包括定量限符合 WL 要求、回收率在 79-120% 之间、日内精密度(相对标准偏差在 1.9-20% 之间)。对实际样品的分析证实,该方法适用于筛选和监测。
{"title":"Direct aqueous injection LC−ESI-MS/MS analysis for the determination of 23 EU watch list substances in whole water samples","authors":"Alena Bednáriková,&nbsp;Peter Tölgyessy","doi":"10.1016/j.chemosphere.2024.143703","DOIUrl":"10.1016/j.chemosphere.2024.143703","url":null,"abstract":"<div><div>The Watch List (WL) monitoring program in the European Union (EU) aims to identify and prioritize emerging pollutants in the aquatic environment that may pose risks to human health and the environment. Thus, reliable methods are needed to determine these substances. This study presents the development of a simple, fast, and green method for analysing 23 WL substances (4 antibiotics, 9 azole compounds, 6 other pesticides, and 4 sunscreens), covering a range of medium to very low polarity (log K<sub>ow</sub> 2.2–6.9), in whole environmental water samples using direct aqueous injection (DAI) in combination with liquid chromatography–electrospray ionization tandem mass spectrometry (LC–ESI-MS/MS). To process the samples, 0.5 mL of acetonitrile is added to 1 mL of raw water, followed by brief shaking. The mixture is then centrifuged to remove sedimented suspended solids before being injected into the LC instrument. A rigorous analytical greenness metric for sample preparation (AGREEprep) assigned this procedure a green score of 0.61. The method showed satisfactory performance characteristics for all analytes under investigation, including limits of quantification meeting the WL requirements, recoveries in the range of 79–120%, and intra-day precision with relative standard deviations in the range of 1.9–20%. The method is suitable for screening and monitoring purposes, as confirmed by the analysis of real samples.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"368 ","pages":"Article 143703"},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142607780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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Chemosphere
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