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Exploring hydrogen isotope fractionation in lipid biomolecules of freshwater algae: implications for ecological and paleoenvironmental studies. 探索淡水藻类脂质生物大分子中的氢同位素分馏:对生态和古环境研究的意义
IF 1.1 4区 环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-12-01 Epub Date: 2024-10-29 DOI: 10.1080/10256016.2024.2419880
Matthias Pilecky, Martin J Kainz, Leonard I Wassenaar

Understanding the stable hydrogen isotope (δ2H) composition and fractionation in lipid biomolecules of primary producers, such as terrestrial and aquatic plants, is crucial for deciphering past environmental conditions, as well as applying compound-specific stable isotope analysis for the study of metabolic and ecological processes. We conducted a new tracer experiment to explore the δ2H composition of algal fatty acid biomarkers, focusing on freshwater algae, which form the base of aquatic food webs. We selected a range of algal species widely found in freshwater ecosystems and cultivated them under controlled conditions. First, we added 2H2O to ambient water as a tracer to investigate the net hydrogen isotope fractionation during algal lipid synthesis at isotopic equilibrium, which is particularly informative for paleo-geochemical studies. Then, we conducted kinetic experiments to quantify the time needed for algal fatty acids to achieve isotopic steady-state conditions in response to the change in ambient water δ2H values. Our findings revealed substantial variability in hydrogen isotope fractionation among different algal taxa and various fatty acids. Based on taxa, different fatty acids exhibited faster integration of water hydrogen than others, but they were not necessarily in the order of the biosynthetic pathway. This experiment underscores the complexity of hydrogen isotope fractionation and the requirement for controlled laboratory studies to properly apply compound-specific stable H isotope analysis techniques in ecological and paleo-environmental studies.

了解陆生和水生植物等初级生产者脂质生物大分子中的稳定氢同位素(δ2H)组成和分馏,对于破译过去的环境条件以及应用特定化合物的稳定同位素分析来研究代谢和生态过程至关重要。我们开展了一项新的示踪实验来探索藻类脂肪酸生物标记物的δ2H组成,重点是构成水生食物网基础的淡水藻类。我们选择了一系列广泛存在于淡水生态系统中的藻类物种,并在受控条件下进行培养。首先,我们在环境水中加入 2H2O 作为示踪剂,研究同位素平衡状态下藻类脂质合成过程中氢同位素的净分馏,这对古地球化学研究特别有参考价值。然后,我们进行了动力学实验,以量化藻类脂肪酸在环境水 δ2H 值变化时达到同位素稳态条件所需的时间。我们的研究结果表明,不同藻类类群和不同脂肪酸之间的氢同位素分馏存在很大差异。根据类群,不同脂肪酸的水氢整合速度快于其他脂肪酸,但它们并不一定按照生物合成途径的顺序排列。该实验强调了氢同位素分馏的复杂性,以及在生态和古环境研究中正确应用特定化合物稳定氢同位素分析技术需要受控实验室研究。
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引用次数: 0
Assessment of natural radioactivity levels in rice samples and their implications for radiological protection. 评估大米样本中的天然放射性水平及其对辐射防护的影响。
IF 1.1 4区 环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-12-01 Epub Date: 2024-10-24 DOI: 10.1080/10256016.2024.2412707
Hannan Younis, Mian Mateen Ullah, Muhammad Adil Khan, Farooq Ahmad, Umair Azeem, Muhammad Waseem, Khurram Mehboob, Muhammad Ajaz, Wazir Muhammad

This study investigates the levels of natural and artificial radioactivity in rice samples collected from various local markets in Islamabad, Pakistan. The 226Ra, 232Th, and 40K activity concentrations were measured through gamma-ray spectrometry with a NaI(Tl) detector. The average activity concentrations were 1.67 ± 1.19 Bq kg-1 for 226Ra, 3.31 ± 1.83 Bq kg-1 for 232Th, and 88.51 ± 11.65 Bq kg-1 for 40K. Calculated radium equivalent (Raeq) values ranged from 7.35 to 18.08 Bq kg-1, with a mean value of 11.11 Bq kg-1, all below the permissible maximum of 370 Bq kg-1. The absorbed dose rates ranged from 6.85 to 16.39 nGy h-1, with an average of 10.64 nGy h-1, falling below the acceptable limit of 51 nGy h-1. The outdoor and indoor radiation hazard indices (Hex and Hin) had mean values of 0.03, both below the threshold value of one. The external and internal hazard indices (Iγ and Iα) were both 0.088, also below the critical value of one. The excess lifetime cancer risk (ELCR) ranged from 0.28 to 0.11, with a mean value of 0.18, which is less than the critical value of one. Overall, the radioactivity levels in the analyzed rice samples are within the acceptable limits set by the International Commission on Radiological Protection and are below global averages. These results offer important insights into the radiological safety of rice consumption in the study area.

本研究调查了从巴基斯坦伊斯兰堡各地方市场采集的大米样本中天然和人工放射性水平。通过使用 NaI(Tl) 探测器的伽马射线光谱仪测量了 226Ra、232Th 和 40K 的放射性活度浓度。226Ra 的平均放射性浓度为 1.67 ± 1.19 Bq kg-1,232Th 为 3.31 ± 1.83 Bq kg-1,40K 为 88.51 ± 11.65 Bq kg-1。镭当量(Raeq)的计算值介于 7.35 至 18.08 Bq kg-1 之间,平均值为 11.11 Bq kg-1,均低于 370 Bq kg-1 的最大允许值。吸收剂量率介于 6.85 至 16.39 nGy h-1 之间,平均值为 10.64 nGy h-1,低于 51 nGy h-1 的可接受限值。室外和室内辐射危害指数(Hex 和 Hin)的平均值为 0.03,均低于 1 的临界值。外部和内部危害指数(Iγ 和 Iα)均为 0.088,也低于临界值 1。超额终生致癌风险(ELCR)介于 0.28 至 0.11 之间,平均值为 0.18,低于临界值 1。总体而言,分析的大米样本中的放射性水平在国际辐射防护委员会规定的可接受范围内,低于全球平均水平。这些结果为研究地区大米消费的辐射安全提供了重要依据。
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引用次数: 0
In memoriam: Dr. Keith Alan Hobson, a pioneer of stable isotope ecology. 悼念基思-艾伦-霍布森博士,稳定同位素生态学的先驱。
IF 1.1 4区 环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-12-01 Epub Date: 2024-12-03 DOI: 10.1080/10256016.2024.2434511
Leonard I Wassenaar
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引用次数: 0
Copper and its isotopes: a brief overview of its implications in geology, environmental system, and human health. 铜及其同位素:概述其在地质学、环境系统和人类健康方面的影响。
IF 1.1 4区 环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-12-01 Epub Date: 2024-10-04 DOI: 10.1080/10256016.2024.2410290
Tanya Srivastava, Nishchal Wanjari

Copper, a malleable and ductile transition metal, possesses two stable isotopes. These copper isotopic composition data have recently found diverse applications in various fields and disciplines. In geology, copper isotopes serve as tracers that aid in investigating ore formation processes and the mechanisms of copper deposits Likewise, it has emerged as a valuable tracer in polluted environments. In plant biology, copper acts as an essential micronutrient crucial for photosynthesis, respiration, and growth. Copper isotopes contribute to understanding how plants uptake and dispense copper from the soil within their tissues. Similarly, in animals, copper serves as an essential trace element, playing a vital role in growth, white blood cell function, and enzyme activity. In humans, copper acts as an antioxidant, neutralising harmful free radicals within the body. It also helps in maintaining the nervous and immune system. Furthermore, copper isotopes find medical applications, particularly in cancer diagnostics, neurodegenerative diseases, and targeted radiotherapy. However, excessive copper can have detrimental effects in humans such as it can cause liver damage, nausea, and abdominal pain, whilst in plants it can affect the growth of plants, photosynthesis, and membrane permeability. This review emphasises the significance of copper and its isotopes in geology, the environment, and human health.

铜是一种具有延展性和韧性的过渡金属,拥有两种稳定的同位素。最近,这些铜同位素组成数据在各个领域和学科中得到了广泛应用。在地质学中,铜同位素是一种示踪剂,有助于研究矿石形成过程和铜矿床的机制。在植物生物学中,铜是光合作用、呼吸作用和生长所必需的微量元素。铜同位素有助于了解植物如何从土壤中吸收铜并将其释放到组织中。同样,在动物体内,铜也是一种重要的微量元素,在生长、白细胞功能和酶活性方面发挥着至关重要的作用。在人体中,铜是一种抗氧化剂,能中和体内有害的自由基。它还有助于维护神经和免疫系统。此外,铜同位素在医学上也有应用,特别是在癌症诊断、神经退行性疾病和靶向放射治疗方面。然而,过量的铜会对人体产生有害影响,如导致肝损伤、恶心和腹痛,而在植物体内则会影响植物的生长、光合作用和膜渗透性。本综述强调了铜及其同位素在地质学、环境和人类健康中的重要性。
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引用次数: 0
Estimation of radiological health risks due to 226Ra, 232Th, and 40K in foods consumed in Iraqi Kurdistan Region. 伊拉克库尔德斯坦地区食品中 226Ra、232Th 和 40K 放射性健康风险估算。
IF 1.1 4区 环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-12-01 Epub Date: 2024-10-04 DOI: 10.1080/10256016.2024.2411360
Dedawan Salam Saleh, Hemn Salh, Jahfer Majeed Smail, Saddon T Ahmad, Sarmad Raheem Kareem

This study investigates the activity concentration of natural radionuclides in a diverse range of food samples in the Koya district markets food baskets, including both domestic and imported products. The samples cover annual crops (e.g. coffee, tea, kidney beans), tree nuts (e.g. almonds, pistachios), and other items (e.g. beef, fish, milk) by using a high-purity germanium (HPGe) detector. This research addresses a notable gap by providing baseline data on radionuclide concentrations and assessing potential health risks. Average activity concentrations for ²²⁶Ra, ²³²Th, and ⁴⁰K were 0.943, 0.367, and 191.8 Bq kg-1, respectively. Radium equivalent activity values ranged from 2.88-58.48 Bq kg-1, all below the safety limit. The average excess lifetime cancer risk (ELCR) was 0.154 mSv a-1, indicating safety for most samples, though coffee and tea showed higher levels. This study provides new data crucial for future research and regulatory monitoring, underscoring the need for further investigation into geological impacts on radionuclide levels.

本研究调查了科亚地区市场菜篮子中各种食品样本(包括国产和进口产品)中天然放射性核素的放射性活度浓度。通过使用高纯锗(HPGe)探测器,样本涵盖了一年生作物(如咖啡、茶、芸豆)、树坚果(如杏仁、开心果)和其他产品(如牛肉、鱼、牛奶)。这项研究通过提供放射性核素浓度的基线数据和评估潜在的健康风险,填补了一个显著的空白。²²⁶Ra、²³²Th 和 ⁴⁰K 的平均放射性活度浓度分别为 0.943、0.367 和 191.8 Bq kg-1。镭当量活度值介于 2.88-58.48 Bq kg-1 之间,均低于安全限值。平均终生超额癌症风险(ELCR)为 0.154 mSv a-1,表明大多数样本都是安全的,但咖啡和茶的含量较高。这项研究提供了对未来研究和监管监测至关重要的新数据,强调了进一步调查地质对放射性核素水平影响的必要性。
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引用次数: 0
Microscale δ34S and δ18O variations of barite as an archive for fluid mixing and microbial sulphur metabolisms in igneous rock aquifers. 重晶石的微尺度δ34S和δ18O变化作为火成岩含水层中流体混合和微生物硫代谢的档案。
IF 1.1 4区 环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-12-01 Epub Date: 2024-10-04 DOI: 10.1080/10256016.2024.2410293
Vanessa Fichtner, Ferdinand Kirchner, Martin Kutzschbach, Harald Strauss, Mikael Tillberg, Martin Whitehouse, Henrik Drake

The stable isotope compositions of sulphur (δ34S) and oxygen (δ18O) in barite are frequently used as proxies for microbial sulphate reduction (MSR) in diverse environments, such as in relation to anaerobic oxidation of methane in marine cold seeps. There, isotopically heavy barite is used as a marker for MSR from a sulphate pool that has undergone semi-closed system conditions. Closed-system MSR is also a commonly observed feature in igneous rock hosted fracture aquifers, as shown by extremely 34S-enriched pyrite. What is less well-constrained is whether δ34S in barite can be used as a proxy for MSR in such systems. Here we explore the microscale heterogeneity of δ34S and δ18O via secondary ion mass spectrometry and the trace element Sr via LA-ICP-MS maps in barite precipitated in granite-hosted boreholes during a 17-year experiment, at Äspö, Sweden. We compare it with δ18Osulfate, δ34Ssulfate, and δ34Ssulfide of the fracture fluids and with paragenetic pyrite with δ34S values reflecting closed system MSR. The δ18O values in barite (+9.4 to +16.9 ‰) represent two generations of barite, one with low values and one with high values. The latter are likely impacted by sulphur disproportionating or -oxidizing bacteria. The barite reflects a much smaller span in δ34S (+14.5 to +28.6 ‰) than the pyrite (-47.2 to +53.3 ‰). This lack of extremely high δ34Sbarite values is proposed to be due to that barite saturation only occurred in the early parts of the Rayleigh cycle. Additionally, fluid migration has affected the δ34S values to lower values, accompanied by higher Sr concentrations. Taken together, barite δ34S values cannot be regarded as a reliable independent proxy for MSR in deep sulphate-poor igneous rock hosted aquifers. However, the relation between the δ34S values of coeval barite and pyrite is regarded as a useful proxy for MSR-related fractionation during early stages of MSR.

重晶石中硫(δ34S)和氧(δ18O)的稳定同位素组成经常被用作不同环境中微生物硫酸盐还原(MSR)的替代物,例如与海洋冷渗漏中甲烷的厌氧氧化有关的替代物。在那里,同位素重晶石被用作经过半封闭系统条件的硫酸盐池中微生物硫酸盐还原的标记。封闭系统 MSR 也是在火成岩承压含水层中经常观察到的一个特征,34S 富集程度极高的黄铁矿就表明了这一点。重晶石中的δ34S是否可以作为此类系统中MSR的替代物,目前还不太清楚。在此,我们通过二次离子质谱法探究了重晶石中δ34S 和 δ18O的微观异质性,并通过LA-ICP-MS图谱探究了在瑞典Äspö进行的一项为期17年的实验中花岗岩寄生钻孔中沉淀的重晶石中痕量元素Sr的微观异质性。我们将其与裂缝流体中的δ18硫酸盐、δ34硫酸盐和δ34硫化物以及反映封闭系统 MSR 的δ34S 值的准成岩黄铁矿进行了比较。重晶石中的δ18O值(+9.4 至 +16.9‰)代表了两代重晶石,一代数值较低,一代数值较高。后者很可能受到硫歧化或氧化细菌的影响。与黄铁矿(-47.2 至 +53.3‰)相比,重晶石反映的 δ34S 跨度(+14.5 至 +28.6‰)要小得多。之所以没有极高的δ34S重晶石值,是因为重晶石饱和只发生在瑞利周期的早期。此外,流体迁移使δ34S值降低,同时锶浓度升高。综上所述,重晶石δ34S 值不能被视为贫硫酸盐火成岩深层含水层 MSR 的可靠独立替代值。然而,共生重晶石和黄铁矿的δ34S值之间的关系被认为是MSR早期阶段与MSR相关的分馏的有用替代值。
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引用次数: 0
Stable-isotope variability in daily precipitation: insights from a low-cost collector in SE England. 日降水的稳定同位素变异性:英格兰东南部低成本收集器的启示。
IF 1.1 4区 环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-12-01 Epub Date: 2024-09-20 DOI: 10.1080/10256016.2024.2402730
Jonathan Holmes, Anne-Lise Jourdan, W George Darling

Precipitation stable-isotope data are often used in hydroclimatic, hydrological and hydrogeological investigations, with measurements typically undertaken on integrated monthly samples. However, daily sampling reveals overlooked aspects of controls on precipitation isotope values, including synoptic meteorological conditions. We present a one-year record of stable isotopes in daily precipitation during 2021, from a site in SE England close to Greater London. We find marked daily variability over the course of the year (-15.62 to +0.92 ‰ for δ18O, -108.7 to +2.9 ‰ for δ2H and -6.5 to +23.1 ‰ for deuterium excess). Correlations with individual meteorological variables including precipitation amount, temperature and weather type are moderate to weak suggesting complex controls on the daily rainfall isotope values. The daily data are compared with three other daily datasets from England and, by conversion to monthly values, directly with data from three long-term collection stations across Britain and Ireland. The scale of variability in the daily data from our site is consistent with that seen in other English records despite them all coming from different time periods. The monthly data show broad consistency, although there are differences that also highlight geographical variability in precipitation values across the British Isles.

降水稳定同位素数据经常被用于水文气候、水文和水文地质调查,通常是对每月的综合样本进行测量。然而,每日取样揭示了控制降水同位素值的一些被忽视的方面,包括同步气象条件。我们展示了 2021 年期间英国东南部靠近大伦敦地区的一个站点每日降水中稳定同位素的一年记录。我们发现这一年中每天的变化都很明显(δ18O 为 -15.62 至 +0.92 ‰,δ2H 为 -108.7 至 +2.9 ‰,氘过量为 -6.5 至 +23.1 ‰)。与个别气象变量(包括降水量、温度和天气类型)的相关性为中等至弱,表明对日降水同位素值的控制是复杂的。日数据与英格兰其他三个日数据集进行了比较,并通过转换为月值,直接与英国和爱尔兰三个长期收集站的数据进行了比较。尽管我们站点的日数据来自不同时期,但其变化范围与英国其他记录一致。月度数据显示出广泛的一致性,但也存在差异,这也凸显了整个不列颠群岛降水值的地理变异性。
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引用次数: 0
Co-application of glucose and phosphorus with recalcitrant high-carbon soil amendments improves N retention in a reclaimed soil: a long-term incubation study. 将葡萄糖和磷与难降解的高碳土壤改良剂共同施用可提高开垦土壤的氮保留率:一项长期培养研究。
IF 1.1 4区 环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-11-26 DOI: 10.1080/10256016.2024.2423797
Zhijie Li, Rüdiger Reichel, Holger Wissel, Kerui Zhao, Nicolas Brüggemann

Incorporation of soil amendments with high organic carbon content (HCA) can reduce losses of mineral nitrogen (N) from agricultural soils. The magnitude of N immobilization and remobilization is strongly controlled by the availability of carbon (C) and phosphorus (P). However, the exact mechanisms and interactions between C, N, and P availability are poorly understood. An eight-month incubation experiment was conducted on recultivated mine soil with low organic C, mineral N and P background concentrations to investigate the effects of HCA in combination with 13C-labelled glucose and mineral P fertilization on greenhouse gas emissions, soil nutrient status (dissolved organic C (DOC), nitrate (NO3-), extractable P), and microbial biomass growth. The experiment had a factorial design of one N level × two P levels × six C treatments (control, wheat straw, poplar sawdust, glucose, and combinations of wheat straw or sawdust with glucose). The HCA increased the cumulative CO2 and CH4 emissions but decreased N2O emission, except for wheat straw. Addition of 13C-labelled glucose decreased the cumulative CH4 emission by 59 and 85 % in the sawdust and sawdust + P treatment, respectively. Glucose application reduced the NO3- content in the HCA-amended soil by 26-64 %, while P fertilizer further decreased the NO3- content in the wheat straw and sawdust treatments by 20 and 24 %, respectively. Both HCA and glucose treatments promoted microbial biomass growth and reduced the soil mineral N content. The δ13C of microbial biomass (δ13CMB) showed an increasing trend during the whole experiment, although 13C-labelled glucose was added only once at the beginning of the experiment. Addition of HCA decreased δ13CMB, while P addition had the opposite effect. In conclusion, adding a readily available C source to HCA may increase the efficacy of retaining N in post-harvest soils, particularly of more recalcitrant types of HCA like sawdust.

掺入高有机碳含量(HCA)的土壤改良剂可以减少农业土壤中矿物氮(N)的损失。氮固定化和再固定化的程度在很大程度上受到碳(C)和磷(P)供应量的控制。然而,人们对碳、氮和磷可用性之间的确切机制和相互作用知之甚少。我们在有机碳、矿物质氮和磷背景浓度较低的复耕矿山土壤上进行了为期八个月的培养实验,以研究 HCA 与 13C 标记葡萄糖和矿物质磷肥相结合对温室气体排放、土壤养分状况(溶解有机碳 (DOC)、硝酸盐 (NO3-)、可提取磷)和微生物生物量增长的影响。实验采用因子设计,即 1 个氮水平 × 2 个磷水平 × 6 个碳处理(对照、小麦秸秆、杨树锯末、葡萄糖以及小麦秸秆或锯末与葡萄糖的组合)。除小麦秸秆外,HCA 增加了二氧化碳和甲烷的累积排放量,但减少了一氧化二氮的排放量。在锯木屑和锯木屑 + P 处理中,添加 13C 标记的葡萄糖可使累积 CH4 排放量分别减少 59% 和 85%。施用葡萄糖可使 HCA 改良土壤中的 NO3- 含量降低 26-64%,而 P 肥料可使小麦秸秆和锯屑处理中的 NO3- 含量分别进一步降低 20% 和 24%。HCA 和葡萄糖处理都促进了微生物生物量的增长,降低了土壤矿物氮的含量。在整个实验过程中,微生物生物量的 δ13C(δ13CMB)呈上升趋势,尽管 13C 标记的葡萄糖只在实验开始时添加了一次。添加 HCA 会降低 δ13CMB,而添加 P 则会产生相反的效果。总之,在 HCA 中添加容易获得的 C 源可能会提高收获后土壤中保留氮的功效,尤其是锯屑等较难降解的 HCA。
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引用次数: 0
Dragonflies (Odonata) as bioindicators of radioactivity. 作为放射性生物指标的蜻蜓(蜻蜓目)。
IF 1.1 4区 环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-11-22 DOI: 10.1080/10256016.2024.2425070
Andrea Vukoja, Tomislav Bogdanović, Davor Rašeta, Nora Miljanić, Iva Ivanišić Risek, Krunoslav Ilić, Ivan Pavičić, Ana Marija Marjanović Čermak, Branko Petrinec

Bioindicators are living organisms that are successfully used for monitoring changes in the environmental health due to natural and/or anthropogenic influences. Dragonflies (Odonata) are considered to be good indicators of water quality; however, research on dragonflies as potential indicators of radioactivity is scarce. The aim of this study was to evaluate dragonflies as potential biological indicators of ionising radiation in nature by measuring 137Cs activity concentrations in the dragonfly and river water samples. Altogether, 11 collective samples of dragonflies were collected from the bank of the Mura-Drava-Danube Biosphere Reserve, in the area of Virovitica-Podravina County. Following the initial sample preparation, the gamma spectrometry technique, employing an ORTEC HPGe detector system, was utilised to determine the activity concentrations of 137Cs. The results show that the activity concentrations of 137Cs in the river water were in the range from 4 to 13 Bq/m3. The results of dragonfly samples showed that 137Cs was in the range from 1.7 to 3 Bq/kg. This was more than a hundred times higher than in the river Drava water. According to the obtained results, we conclude that dragonflies could be used as potential bioindicators of radioactivity.

生物指标是成功用于监测自然和/或人为影响导致的环境健康变化的生物。蜻蜓(蜻蜓目)被认为是水质的良好指标,但有关蜻蜓作为放射性潜在指标的研究却很少。本研究旨在通过测量蜻蜓和河水样本中的 137Cs 活性浓度,评估蜻蜓作为自然界电离辐射潜在生物指标的作用。研究人员从维罗维蒂察-波德拉维纳县(Virovitica-Podravina County)的穆拉-德拉瓦-多瑙河生物圈保护区(Mura-Drava-Danube Biosphere Reserve)河岸共采集了 11 份蜻蜓样本。在对样本进行初步处理后,利用伽马能谱仪技术(采用 ORTEC HPGe 探测器系统)测定了 137Cs 的放射性浓度。结果显示,河水中 137Cs 的放射性浓度介于 4 至 13 Bq/m3 之间。蜻蜓樣本的結果顯示,137Cs 的活度濃度介乎每公斤 1.7 至 3 Bq。这比德拉瓦河水高一百多倍。根据所获得的结果,我们得出结论,蜻蜓可以作为潜在的放射性生物指标。
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引用次数: 0
Deuterium in drinking water and its effects on cancer and longevity. 饮用水中的氘及其对癌症和寿命的影响。
IF 1.1 4区 环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-11-18 DOI: 10.1080/10256016.2024.2424454
Meiling Zhong, Jiaxue Wang, Ouyi Zhao, Qiuyi Li

This study investigates the spatial distribution of longevity levels, deuterium in drinking water, and cancer incidence rates, and further examines the impact of deuterium in drinking water on longevity and cancer incidence. Methods such as correlation coefficients and Kriging spatial interpolation were employed to uncover the characteristics of spatial distribution and identify correlations. Findings reveal that regions with higher longevity levels are mostly located on the eastern side of the Hu Huanyong Line (Heihe-Tengchong Line). Deuterium in drinking water decreases from low latitude, low elevation, and coastal areas to high latitude, high elevation, and inland regions. Notably, there is a positive correlation between deuterium content in drinking water and longevity levels, indicating that higher deuterium content is associated with increased longevity. Additionally, counties with lower deuterium content in drinking water show a reduced incidence of cancer cases.

本研究调查了长寿水平、饮用水中的氘和癌症发病率的空间分布,并进一步研究了饮用水中的氘对长寿和癌症发病率的影响。研究采用了相关系数和克里金空间插值法等方法来揭示空间分布特征并确定相关关系。研究结果表明,长寿地区主要分布在沪杭甬线(黑河-腾冲线)东侧。饮用水中的氘含量从低纬度、低海拔和沿海地区向高纬度、高海拔和内陆地区递减。值得注意的是,饮用水中的氘含量与长寿水平呈正相关,表明氘含量越高,寿命越长。此外,饮用水中氘含量较低的县癌症发病率也较低。
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Isotopes in Environmental and Health Studies
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