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France-Wide Monitoring of 1,4-Dioxane in Raw and Treated Water: Occurrence and Exposure Via Drinking Water Consumption 法国全境监测原水和处理水中的 1,4-二恶烷:饮用水中 1,4-二恶烷的存在与接触。
IF 3.7 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-31 DOI: 10.1007/s00244-024-01078-6
Cristina Bach, Virginie Boiteux, Xavier Dauchy

In recent years, 1,4-dioxane has emerged as a pollutant of increasing concern following widespread detection in the aquatic environment of several countries. This persistent contaminant with specific physical and chemical properties can be rapidly dispersed and transported to river banks, groundwater and drinking water. Given the limited data on its occurrence in France, it was considered necessary to assess the potential exposure of the French population to this compound in drinking water. An analytical method based on solid-phase extraction (SPE) combined with gas chromatography tandem mass spectrometry (GC–MS/MS) was developed and validated during this study with a limit of quantification (LOQ) of 0.15 µg/L. Recoveries in natural water matrices ranged from 113 to 117% with a relative bias not exceeding 17%. This method was used for a nationwide campaign at almost 300 sites, evenly distributed over 101 French départements (administrative units), including some that were overseas. Of the 587 samples analysed, only 8% had a concentration that was greater than or equal to the LOQ. 1,4-Dioxane was detected mainly (63%) in raw and treated water from sites associated with historical industrial practices related to the use of chlorinated solvents. Concentrations of 1,4-dioxane ranging from 0.19 to 2.85 µg/L were observed in the raw water and from 0.18 to 2.46 µg/L in the treated water. Drinking water treatment plants using ozonation, granular activated carbon and chlorination have limited effectiveness in the removal of 1,4-dioxane. The results of this study are the first step towards bridging the knowledge gap in the occurrence of 1,4-dioxane in France.

近年来,在多个国家的水生环境中广泛检测到 1,4-二恶烷后,它已成为一种日益受到关注的污染物。这种具有特殊物理和化学性质的持久性污染物可以迅速扩散并迁移到河岸、地下水和饮用水中。鉴于法国有关该化合物出现的数据有限,因此有必要评估法国人在饮用水中接触该化合物的可能性。本研究开发并验证了一种基于固相萃取(SPE)结合气相色谱串联质谱(GC-MS/MS)的分析方法,其定量限(LOQ)为 0.15 µg/L。在天然水基质中的回收率为 113% 至 117%,相对偏差不超过 17%。该方法在全国范围内的近 300 个检测点使用,这些检测点均匀分布在法国的 101 个省(行政单位),包括一些海外检测点。在分析的 587 份样品中,只有 8% 的浓度大于或等于最低检测限。1,4-二恶烷主要(63%)在原水和经过处理的水中检测到,这些原水和经过处理的水来自与使用氯化溶剂有关的历史工业生产场所。原水中的 1,4-二恶烷浓度从 0.19 微克/升到 2.85 微克/升不等,处理水的浓度从 0.18 微克/升到 2.46 微克/升不等。使用臭氧、颗粒活性炭和氯化法的饮用水处理厂在去除 1,4-二恶烷方面效果有限。这项研究的结果是弥补法国在 1,4-二恶烷发生方面的知识空白的第一步。
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引用次数: 0
Hazardous Elements in the Edible Portion of Perna perna Mussels: Relation with the COVID-19 Pandemic Period and Assessment of the Risk to Human Health 珍珠贝食用部分中的有害元素:与 COVID-19 大流行时期的关系以及对人类健康风险的评估。
IF 3.7 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-30 DOI: 10.1007/s00244-024-01080-y
Dayvison Felismindo Lima, Ana Paula Madeira Di Beneditto, Inácio Abreu Pestana, Roberto Weider de Assis Franco

In this work, the concentrations of hazardous elements (As, Cd and Pb) in the edible portion of the Perna perna mussel from Southeast Brazil were analyzed to understand the effects of the COVID-19 pandemic on the coastal environment and to evaluate the quality of this fishery resource. Decreases in anthropogenic chemical outputs to the environment were expected to occur during the COVID-19 pandemic, with decreases in element concentrations in mussels. The ranges of median concentrations (µg g−1 dw) in the pre- and pandemic periods were 5.4–16.1 and 2.2–10.6 for As; 0.2–0.6 and 0.1–0.5 for Cd; and 1.2–3.2 and 0.7–1.8 for Pb, respectively. Temporal variations (prepandemic x pandemic) were more significant than spatial variations (five sampling sites). The relationships between the concentrations of hazardous elements and isotopic ratios (δ15N and δ13C) suggested that food sources were more diverse across the sampling sites during the pandemic period, when individuals exhibited less efficient trophic transfer. The concentrations of Cd and Pb were below the tolerable maximum limit, whereas for As, they were above the limit; however, these concentrations are not a risk to human health, as most As was present in the least toxic organic form. The intake estimates were below the tolerable intake limits, and only Pb concentrations are at risk of causing concern if the intake of mussels increases. This is the first study in Brazil that presents a spatial–temporal comparison of hazardous elements in marine fauna considering COVID-19 as a temporal landmark. The results are of interest for both public health and environmental health management in a post-COVID-19 scenario.

这项研究分析了巴西东南部贻贝(Perna perna mussel)可食用部分中有害元素(砷、镉和铅)的浓度,以了解 COVID-19 大流行对沿海环境的影响,并评估这种渔业资源的质量。预计在 COVID-19 大流行期间,人为向环境排放的化学物质会减少,贻贝中的元素浓度也会下降。大流行前和大流行期间的中位浓度范围(微克 g-1 干重)分别为:砷 5.4-16.1 和 2.2-10.6;镉 0.2-0.6 和 0.1-0.5;铅 1.2-3.2 和 0.7-1.8。时间变化(大流行前 x 大流行)比空间变化(五个采样点)更为显著。有害元素浓度与同位素比值(δ15N 和 δ13C)之间的关系表明,在大流行期间,各采样点的食物来源更加多样化,此时个体的营养转移效率较低。镉和铅的浓度低于可容忍的最高限值,而砷的浓度则高于限值;不过,这些浓度不会对人类健康造成危害,因为大多数砷是以毒性最小的有机物形式存在的。摄入量估计值低于可容忍摄入量限值,如果贻贝摄入量增加,只有铅浓度有可能引起关注。这是巴西首次以 COVID-19 为时间标志,对海洋动物体内的有害元素进行时空比较的研究。研究结果对于后 COVID-19 时代的公共卫生和环境卫生管理都很有意义。
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引用次数: 0
Residues from the Fundão Dam Accident in Brazil and their Effects on Photosynthetic Efficiency of Two Restinga Plant Species 巴西 Fundão 大坝事故残留物及其对两种 Restinga 植物光合效率的影响。
IF 3.7 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-29 DOI: 10.1007/s00244-024-01079-5
Namir Gabriely Matos Lopes, Eliemar Campostrini, Marcel Giovanni Costa França

In 2015, a breach in the Fundão Dam in Mariana (Minas Gerais State, Brazil) resulted in the release of contaminated tailings into the Doce River basin. This accident increased the concentrations of arsenic (As), lead (Pb), cadmium (Cd), vanadium (V), and manganese (Mn) in the soil, posing a potential hazard to the physiology of native species. The purpose of this study was to assess whether chlorophyll a fluorescence (ChlF) in Allagoptera arenaria and Guapira pernambucensis changed following this accident when tested under different precipitation regimes in relation to soil properties and metal(loid) absorption. Our research was conducted in two sites located in the state of Espírito Santo in southeastern Brazil. Five independent biological replicates of A. arenaria and G. pernambucensis were selected at each site for nutritional and chlorophyll a fluorescence analysis. Five years after the dam rupture, A. arenaria and G. pernambucensis had absorbed As, Pb, and V. The increased amounts of metal(loid)s absorbed did not significantly impair the OJIP curve configuration for either species during the evaluated periods. However, A. arenaria at Biological Reserve of Comboios (RBC) during the rainy season showed increases in the values of maximum quantum yield of PSII photochemistry (φP0) and total performance index on absorption basis (PITOTAL). These changes indicated more efficient tolerance mechanisms for increases in the concentrations of As, Pb, and V than those observed in G. pernambucensis. It was concluded that A. arenaria and G. pernambucensis exhibited an acclimation strategy in response to increased absorption of metal(loid)s.

2015 年,马里亚纳(巴西米纳斯吉拉斯州)的 Fundão 大坝发生溃坝事故,导致受污染的尾矿流入多塞河流域。这次事故增加了土壤中砷(As)、铅(Pb)、镉(Cd)、钒(V)和锰(Mn)的浓度,对本地物种的生理构成了潜在危害。本研究的目的是评估 Allagoptera arenaria 和 Guapira pernambucensis 的叶绿素 a 荧光(ChlF)在事故发生后,在不同降水条件下的测试是否会发生变化,这与土壤特性和金属(loid)吸收有关。我们的研究在巴西东南部圣埃斯皮里图州的两个地点进行。在每个地点选取了五个独立的 A. arenaria 和 G. pernambucensis 生物复制样本,进行营养和叶绿素 a 荧光分析。大坝决堤五年后,A. arenaria 和 G. pernambucensis 吸收了 As、Pb 和 V。不过,在雨季期间,康波伊奥斯生物保护区(RBC)的 A. arenaria 显示出 PSII 光化学最大量子产率(φP0)和吸收基础上的总性能指数(PITOTAL)值的增加。这些变化表明,与在 G. pernambucensis 中观察到的变化相比,A. arenaria 对 As、Pb 和 V 的浓度增加具有更有效的耐受机制。结论是,A. arenaria 和 G. pernambucensis 对金属吸收量的增加表现出一种适应策略。
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引用次数: 0
Impact of Exposure to Leaves From Metal-Polluted Sites on the Developmental Parameters of Larvae of the Dark Sword-Grass, Agrotis ipsilon (Lepidoptera: Noctuidae) 暴露于金属污染区的叶片对暗剑草(鳞翅目:夜蛾科)幼虫发育参数的影响。
IF 3.7 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-24 DOI: 10.1007/s00244-024-01076-8
Shrouk Rasmy, Amr Mohamed, Hesham A. Yousef

Insects are impacted by pollutants in their environments and food sources. Herein, we set out a semi-field study to assess the impact of environmental heavy metal contamination on developmental parameters, energy reserves, and acidic and alkaline phosphatases in the larval Agrotis ipsilon (Lepidoptera: Noctuidae). Castor leaves from contaminated and uncontaminated (reference site) areas were fed to A. ipsilon larvae in all treatments. The heavy metal concentrations in the plant from different areas (contaminated and reference sites) and in the larvae were analyzed. Toxic effects were observed in the larvae feeding on the leaves from the metal contaminated areas. Larval and pupal weights, growth indices, and larval fitness were all significantly lower than in the reference group. Likewise, in the third and fourth instars, there was a significant decrease in both the survival and moth emergence rates. In contrast, the pupation duration was significantly longer. Total protein, lipid, and glycogen content showed significant reductions in treated larvae. Larval homogenate samples contaminated with heavy metals showed a significant increase in acid- and alkaline- phosphatase levels. The results obtained could provide a basis for a long-term evaluation of the risk associated with heavy metals and their impact on plant populations and important agricultural pests.

昆虫会受到环境和食物来源中污染物的影响。在此,我们进行了一项半实地研究,以评估环境重金属污染对 Agrotis ipsilon(鳞翅目:夜蛾科)幼虫的发育参数、能量储备以及酸性和碱性磷酸酶的影响。在所有处理中,用来自受污染地区和未受污染地区(参考地点)的蓖麻叶喂养褐飞虱幼虫。分析了不同地区(污染区和参照区)的植物和幼虫体内的重金属浓度。在幼虫取食金属污染区的叶片时,观察到了毒性效应。幼虫和蛹的体重、生长指数和幼虫体能都明显低于参照组。同样,第三和第四龄幼虫的存活率和出蛾率也明显下降。相比之下,蛹期明显延长。经处理的幼虫体内的总蛋白、脂质和糖原含量明显减少。受重金属污染的幼虫匀浆样本显示,酸性和碱性磷酸酶水平显著增加。所获得的结果可为长期评估与重金属有关的风险及其对植物种群和重要农业害虫的影响提供依据。
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引用次数: 0
Insights into In Situ Benthic Caging Tests for Ecotoxicity Assessments Targeting Discharging Groundwater Contaminant Plumes 针对地下水污染物羽流进行生态毒性评估的原位底栖生物笼养试验的启示。
IF 3.7 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-03 DOI: 10.1007/s00244-024-01075-9
J. W. Roy, L. Grapentine

While in situ toxicity testing with caged organisms has been used to assess surface water and sediment contamination, no successful application to benthic organisms exposed to highly contaminated groundwater plumes discharging to surface waters has been reported. The objective of this study was to demonstrate and evaluate this application using four sets of tests performed at three previously reported contaminated groundwater sites, which include one river site affected by volatile organic contaminant plumes, and two sites, one pond and one small urban stream, impacted by landfill plumes. The study examined multiple cage designs and orientations and two test organisms: an amphipod (Hyalella azteca) and midge larvae (Chironomus riparius; only one study). Cages were deployed for between 5 and 28 days and assessed for organism survival and growth. At all sites and for some deployment conditions, cages exposed to high contaminant concentrations in the plume footprint had greater mortality compared to those exposed to lower or background concentrations. Organism growth was less clear as a metric of toxicity. Vertically oriented cages typically showed high mortality to plume contaminants, but some were also affected by other non-target groundwater conditions (e.g., low dissolved oxygen, other contaminant sources), while horizontally oriented cages were rarely responsive to either groundwater influence. A hybrid cage design showed much promise in its single study. Useful observations on the test organisms and on potentially problematic site conditions were also made. The informed use of in situ toxicity cages could be an additional beneficial tool for groundwater contaminated site assessments.

虽然笼养生物的原位毒性测试已被用于评估地表水和沉积物污染,但尚未有报道称成功应用于暴露于向地表水排放的高污染地下水羽流中的底栖生物。本研究的目的是通过在三个先前报告的受污染地下水地点(包括一个受挥发性有机污染物羽流影响的河流地点和两个受垃圾填埋羽流影响的地点(一个池塘和一条城市小溪流))进行的四组测试来演示和评估这种应用。研究考察了多种笼子设计和方向以及两种测试生物:片脚类动物(Hyalella azteca)和蠓幼虫(Chironomus riparius;仅有一项研究)。笼子放置 5 到 28 天,评估生物的存活和生长情况。在所有地点和某些部署条件下,与暴露在较低或背景浓度下的笼子相比,暴露在羽流足迹中高浓度污染物下的笼子死亡率更高。作为衡量毒性的指标,生物生长情况并不明显。垂直放置的笼子通常对羽流污染物有较高的死亡率,但有些笼子也会受到其他非目标地下水条件(如低溶解氧、其他污染物来源)的影响,而水平放置的笼子则很少对这两种地下水影响做出反应。在单项研究中,混合笼设计显示出很大的前景。此外,还对试验生物和可能存在问题的现场条件进行了有益的观察。在知情的情况下使用原位毒性笼可以成为地下水污染场地评估的另一个有益工具。
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引用次数: 0
Classification Model of Pesticide Toxicity in Americamysis bahia Based on Quantum Chemical Descriptors 基于量子化学描述符的 Americamysis bahia 农药毒性分类模型。
IF 3.7 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-27 DOI: 10.1007/s00244-024-01077-7
Limin Dang

A set of quantum chemical descriptors (molecular polarization, heat capacity, entropy, Mulliken net charge of the most positive hydrogen atom, APT charge of the most negative atom and APT charge of the most positive atom with hydrogen summed into heavy atoms) was successfully used to establish the classification models for the toxicity pLC50 of pesticides in Americamysis bahia. The optimal random forest model (Class Model A) yielded predictive accuracy of 100% (training set of 217 pesticides), 95.8% (test set of 72 pesticides) and 99.0% (total set of 289 pesticides), which were very satisfactory, compared with previous classification models reported for the toxicity of compounds in aquatic organisms. Therefore, it is reasonable to apply the quantum chemical descriptors associated with molecular structural information on molecular bulk, chemical reactivity and weak interactions, to develop classification models for the toxicity pLC50 of pesticides in A. bahia.

成功地利用一组量子化学描述符(分子极化、热容量、熵、最正氢原子的 Mulliken 净电荷、最负原子的 APT 电荷和最正氢原子的 APT 电荷与重原子的总和)建立了巴伊亚镅中农药毒性 pLC50 的分类模型。最佳随机森林模型(A 类模型)的预测准确率分别为 100%(217 种农药的训练集)、95.8%(72 种农药的测试集)和 99.0%(289 种农药的总集)。因此,应用与分子结构信息相关的量子化学描述符(分子体积、化学反应性和弱相互作用)来建立农药对巴氏杀螨剂毒性 pLC50 的分类模型是合理的。
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引用次数: 0
Chronic Cadmium Exposure can Alter Energy Allocation to Physiological Functions in the Shrimp Penaeus vannamei 慢性镉暴露可改变凡纳滨对虾生理功能的能量分配
IF 3.7 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-26 DOI: 10.1007/s00244-024-01074-w
Juliana Rodrigues da Costa, Mariana V. Capparelli, Pedro Magalhães Padilha, Emanuelle Borges, Andressa C. Ramaglia, Michelle Roberta dos Santos, Alessandra Augusto

Environmental stressors in aquatic organisms can be assessed using a bioenergetic approach based on the evaluation of changes in their physiological parameters. We evaluated the chronic effects of cadmium (Cd2+) on the energy balance as well as the survival, growth, metabolism, nitrogen excretion, hepatosomatic index, oxidized energy substrate, and osmoregulation of the shrimp Penaeus vannamei with the hypothesis that the high energy demand related to the homeostatic regulation of Cd2+could disrupt the energy balance and as a consequence, their physiological functions. The shrimp exposed to Cd2+ had higher mortality (30%), directed more energy into growth (33% of energy intake), ingested 10% more energy, and defecated less than control animals. Cd2+ exposure caused a tendency to decrease metabolism and ammonia excretion but did not alter the hepatosomatic index, type of energy substrate oxidized, and the hyperosmorregulatory pattern of the species. The Cd+2 exposure may have induced a trade-off response because there was a growth rate increase accompanied by increased mortality.

水生生物的环境压力可通过生物能方法进行评估,该方法基于对其生理参数变化的评估。我们评估了镉(Cd2+)对凡纳滨对虾(Penaeus vannamei)的能量平衡以及生存、生长、新陈代谢、氮排泄、肝功能指数、氧化能量底物和渗透调节的慢性影响,假设与 Cd2+ 的体内平衡调节有关的高能量需求可能会破坏能量平衡,从而影响其生理功能。与对照组相比,暴露于 Cd2+ 的对虾死亡率更高(30%),将更多的能量用于生长(占能量摄入的 33%),摄入的能量多 10%,排便更少。接触 Cd2+ 会导致新陈代谢和氨排泄量下降,但不会改变该物种的肝胆指数、能量底物氧化类型和高渗透调节模式。接触 Cd+2 可能诱发了一种权衡反应,因为生长率增加的同时死亡率也增加了。
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引用次数: 0
UVB-Aged Microplastics and Cellular Damage: An in Vitro Study 紫外线老化微塑料与细胞损伤:体外研究
IF 3.7 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-19 DOI: 10.1007/s00244-024-01073-x
Sebastiano La Maestra, Mirko Benvenuti, Stefano Alberti, Linda Ferrea, Francesco D’Agostini

Plastics are synthetic organic compounds whose widespread use generates enormous waste. Different processes, such as mechanical abrasion, microbiological activity, and UVB irradiation, can fragment the plastic material and generate microplastics (MPs). MPs are ubiquitous, and various organisms, including humans, can ingest or inhale them, with potential adverse health effects. The differences between UV-aged and virgin particles were studied to evaluate the genotoxic damage and oxidative stress induced by polystyrene MPs with 1 and 5 µm sizes on the monocyte-like cell line (THP-1). Fourier transform infrared spectroscopy and Ζ-potential measurements were used to characterise MP particles after UVB exposure. Cells exposed to MPs show a widespread change in the cellular environment with the generation of reactive oxidative species (ROS), as indicated by the increased malondialdehyde level. The occurrence of genotoxic damage is correlated to the smaller size and ageing state of the MPs. The biochemical and genomic alterations observed in this in vitro study suggest that MPs, ubiquitous pollutants, following natural degradation and oxidation processes can cause various adverse effects on the health of the exposed population, making it necessary to carry out further studies to better define the real risk.

塑料是一种合成有机化合物,其广泛使用会产生大量垃圾。不同的加工过程,如机械磨损、微生物活动和紫外线照射,都会使塑料材料破碎并产生微塑料(MPs)。微塑料无处不在,包括人类在内的各种生物都可能摄入或吸入微塑料,从而对健康造成潜在的不良影响。研究人员对紫外线老化颗粒和原始颗粒之间的差异进行了研究,以评估 1 微米和 5 微米大小的聚苯乙烯微塑料对单核细胞样细胞系(THP-1)诱导的基因毒性损伤和氧化应激。傅立叶变换红外光谱法和Ζ电位测量法用于描述紫外线照射后 MP 粒子的特征。暴露于 MPs 的细胞显示出细胞环境的广泛变化,产生了活性氧化物(ROS),丙二醛含量的增加就表明了这一点。基因毒性损伤的发生与 MPs 较小的尺寸和老化状态有关。在这项体外研究中观察到的生化和基因组变化表明,MPs 作为无处不在的污染物,经过自然降解和氧化过程后,会对暴露人群的健康造成各种不利影响,因此有必要开展进一步研究,以更好地确定实际风险。
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引用次数: 0
Characterization of Adverse Outcomes from Legacy-Contaminated Groundwater Exposure to Early Life Stages of Fathead Minnow 确定黑头鲦鱼早期生命阶段接触遗留污染地下水的不良后果。
IF 3.7 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-13 DOI: 10.1007/s00244-024-01069-7
Laura Gasque-Belz, Bradley Park, Steven Siciliano, Natacha Hogan, Lynn Weber, Patrick Campbell, Rachel Peters, Mark Hanson, Markus Hecker

Complex mixtures of chemicals present in groundwater at legacy-contaminated industrial sites can pose significant risks to adjacent surface waters. The combination of short-term molecular and chronic apical effect assessments is a promising approach to characterize the potential hazard of such complex mixtures. The objectives of this study were to: (1) assess the apical effects (survival, growth, development, and liver histopathology) after chronic exposure of early life stages (ELSs) of fathead minnows (FHM; Pimephales promelas) to contaminated groundwater from a legacy-contaminated pesticide manufacturing and packaging plant, and (2) identify possible molecular mechanisms responsible for these effects by comparing results to mechanistic outcomes previously determined by a short-term reduced transcriptome assay (EcoToxChips). This study revealed a significant increase in mortality and prevalence of spinal curvatures, as well as a significant reduction in the length of FHMs exposed to the groundwater mixtures in a concentration-dependent manner. There was an increasing trend in the prevalence of edema in FHMs, though not significantly different from controls. Additionally, no histopathological effects were observed in the liver of FHMs exposed to the groundwater mixtures. Short-term molecular outcomes determined in a parallel study were found to be informative of chronic apical outcomes, including cardiotoxicity, spinal deformities, and liver toxicity. Overall, the results observed in this study demonstrated that short-term transcriptomics analyses could support the hazard assessment of complex contaminated sites.

Graphical Abstract

Molecular outcomes were reflective of mortality and deformities, but uncertainties remained in the prediction of hepatotoxic effects at apical level.

受遗留污染工业场地地下水中存在的复杂化学品混合物可能会对邻近地表水造成重大风险。结合短期分子评估和慢性根尖效应评估是描述此类复杂混合物潜在危害的一种可行方法。本研究的目标是(1)评估黑头鲦鱼(FHM;Pimephales promelas)早期生命阶段(ELSs)长期暴露于受污染地下水后的顶端效应(存活、生长、发育和肝脏组织病理学),该地下水来自一家受污染的农药制造和包装厂;(2)通过将结果与之前通过短期还原转录组测定(EcoToxChips)确定的机理结果进行比较,确定造成这些效应的可能分子机制。这项研究表明,暴露于地下水混合物中的甲壳虫死亡率和脊柱弯曲率明显增加,身长明显缩短,且与浓度有关。小尾寒羊水肿的发生率呈上升趋势,但与对照组相比没有显著差异。此外,在暴露于地下水混合物的 FHMs 的肝脏中未观察到组织病理学影响。在一项平行研究中确定的短期分子结果被认为可以反映出慢性根尖结果,包括心脏毒性、脊柱畸形和肝脏毒性。总之,本研究观察到的结果表明,短期转录组学分析可为复杂污染场地的危害评估提供支持。
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引用次数: 0
Essential and Non-Essential Elements Levels in Fish Species Highly Consumed in the Middle Miranda River, Brazilian Pantanal 巴西潘塔纳尔米兰达河中游鱼类物种的必需元素和非必需元素含量。
IF 3.7 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-06-09 DOI: 10.1007/s00244-024-01072-y
Fernando Marques Quintela, Fabiano Aguiar da Silva, Fabiano Correa, Fernando Rogério Carvalho, Daniel Galiano, Mel Christine Oliveira Pires, Ulisses Galatti

The present study investigated the levels of As, Ag, Al, Ba, Cd, Cr, Cu, Fe, Hg, Mn, Pb, Se, and Zn in muscle samples of six fish species (Pygocentrus nattereri, Serrasalmus marginatus, Mylossoma duriventre, Leporinus friderici, Pimelodus argenteus, and P. pantaneiro) highly consumed by local riverine and non-resident people in middle Miranda River, southern Brazilian Pantanal. Significant differences were detected for Ba, Fe, Mn, and Zn levels among the analyzed species. Pairwise comparison detected significant differences in element levels between species with similar diets, which implies that other factors, instead of species’ feeding habits, could be involved in distinct levels of element bioaccumulation. Significant correlations between body size and concentrations were found for Ba in P. nattereri (moderate positive correlation), and for Mn in M. duriventre (weak positive correlation) and P. argenteus (moderate negative correlation). Levels exceeding tolerable daily intake (TDI) were found for Pb maximum concentrations in P. nattereri, M. duriventre, L. friderici, P. argenteus, and P. pantaneiro, and for Cd maximum concentration in P. argenteus. Health risk assessment indicated considerable risk only for the worst-case scenario (calculated from maximum concentrations) for all species. Adopting a Pb monitoring program in biotic and abiotic compartments in Miranda River is strongly recommended.

本研究调查了巴西南部潘塔纳尔地区米兰达河中游当地居民和非居民大量食用的六种鱼类(Pygocentrus nattereri、Serrasalmus marginatus、Mylossoma duriventre、Leporinus friderici、Pimelodus argenteus 和 P. pantaneiro)肌肉样本中的砷、银、铝、钡、镉、铬、铜、铁、汞、锰、铅、硒和锌含量。在分析的物种中,钡、铁、锰和锌的含量存在显著差异。配对比较发现,食性相似的物种之间元素水平存在显著差异,这意味着造成元素生物累积水平不同的可能是其他因素,而不是物种的摄食习惯。体型与元素浓度之间存在显著的相关性:钡在 P. nattereri(中度正相关)中,锰在 M. duriventre(弱正相关)和 P. argenteus(中度负相关)中。在 P. nattereri、M. duriventre、L. friderici、P. argenteus 和 P. pantaneiro 中发现的铅最高浓度和 P. argenteus 中的镉最高浓度均超过了每日可容忍摄入量 (TDI)。健康风险评估表明,所有物种只有在最坏情况下(根据最大浓度计算)才会面临相当大的风险。强烈建议在米兰达河的生物区和非生物区开展铅监测计划。
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Archives of Environmental Contamination and Toxicology
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