Journal of environmental radioactivity最新文献

{"title":"Radiological monitoring and assessment of the radiation situation in the Kungur Ice Cave","authors":"A.V. Krasikov ,&nbsp;A.S. Kazantseva","doi":"10.1016/j.jenvrad.2024.107540","DOIUrl":"10.1016/j.jenvrad.2024.107540","url":null,"abstract":"<div><p>This article presents the results of comprehensive radiological studies conducted in 2021 in order to assess the radiation situation in the Kungur Ice Cave (hereinafter referred to as the KIC). Since the cave is a fairly popular sightseeing object, therefore, the safety of both tourists and workers is a key task for scientific study. The radiation safety assessment was carried out taking into account the parameters of the radiation (gamma) background, measurements of radon and thoron concentrations, microclimatic indicators (air temperature, humidity), airflow rate, illumination and calculation of the indicator of a special assessment of working conditions (SAWC). Such comprehensive and detailed studies were conducted in the KIC for the first time, allowing some patterns to be identified and confirmed. For the indicators of gamma-activity and radon concentration, there is a clear dependence on the season of the year, which is directly related to microclimatic indicators, as well as to compliance with the ventilation regulations that have been established in the cave. The applied ventilation modes provide safe values of the radiation background and toron. In the summer months, the average radon content in the cave exceeds the maximum permissible concentrations by a factor of 7, which required calculation of the time of work in the cave. For the first time, special assessment of working conditions has been calculated for Kungur Ice Cave, but only for the winter period. The SAWC is defined for a working group consisting of engineers, workers and guides, taking into account such parameters as temperature, illumination, humidity, severity and intensity of labor and ionizing radiation (radiation background). According to preliminary data, the overall assessment of labor based on all parameters falls under the “harmful” class of conditions.</p></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"280 ","pages":"Article 107540"},"PeriodicalIF":1.9,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142229567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Exploratory research on the multi-life stages mesh-type model of Caenorhabditis elegans in radiation ecology","authors":"Tao Wu ,&nbsp;Huiyuan Xue ,&nbsp;Han Gao,&nbsp;Jiahao Guo,&nbsp;Xinjie Wang,&nbsp;Kaijin Yan,&nbsp;Wenxing Xu,&nbsp;Binquan Niu,&nbsp;Mingxu Zheng,&nbsp;Yidi Wang,&nbsp;Liang Sun","doi":"10.1016/j.jenvrad.2024.107522","DOIUrl":"10.1016/j.jenvrad.2024.107522","url":null,"abstract":"<div><p>To address the lack of effective dose quantification methods for the model organism <em>Caenorhabditis elegans</em> (<em>C. elegans</em>) in radiation ecology research, this study employs remeshing techniques to develop a comprehensive mesh-type model covering multi-life stages, from embryonic to larval (L1, L2, L3, L4) and adulthood. Using these models, Dose Coefficients (DC) for <em>C. elegans</em> in a soil environment under different exposure conditions (external and internal), material settings, and radioactive nuclides (³H, ⁶⁰Co, ⁹⁰Sr, ¹²⁹I, ¹³¹I, ¹³⁴Cs, ¹³⁷Cs) were calculated with the Monte Carlo toolkit Geant4. The results show that the difference in DC, when <em>C. elegans</em> material is set as either biological material or water, is within 5%. Under external exposure conditions, the impact of life stages on the population's average DC is minimal (with a maximum deviation not exceeding 10%). However, the distribution within the population varied significantly across life stages (under external exposure to ¹³⁷Cs, the dispersion was 12.02% for adults and a considerably higher 60.30% for larvae). The earlier the life stage, the greater the variability in DC distribution within the <em>C. elegans</em> population. Furthermore, correlation analysis indicates a strong relationship between DC and life stages under internal exposure scenarios. The mesh-type model of <em>C. elegans</em> established in this study provides a valuable tool for radiation ecology research and has potential applications in broader research fields.</p></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"280 ","pages":"Article 107522"},"PeriodicalIF":1.9,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142172488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Consecutive radioxenon detections as a trigger for further analysis","authors":"M.A. Goodwin,&nbsp;D.L. Chester","doi":"10.1016/j.jenvrad.2024.107526","DOIUrl":"10.1016/j.jenvrad.2024.107526","url":null,"abstract":"<div><p>The prevalence of isotopes of radioxenon in the atmosphere poses a problem for the International Monitoring System (IMS) of the Comprehensive Nuclear-Test-Ban Treaty (CTBT). The atmospheric radioxenon background has accumulated due to emissions from civil nuclear facilities and as a result, the IMS frequently detects isotopes that might be considered a signal of a nuclear explosion. The UK National Data Centre (NDC) at the Atomic Weapons Establishment (AWE) analyses all data from the IMS radionuclide network and through a new ‘event analysis’ pipeline, works to determine the source of each detection of interest. The pipeline consists of sample screening, sample association and source reconstruction methods. There are various methods to determine which detections are worthy of further analysis, such as activity concentration magnitude, number of isotopes detected, isotopic activity ratios or consecutive detections. Once the detections have been identified, atmospheric transport and dispersion modelling (ATDM) simulations can be used to identify and characterise the source. Not all sources are known to the Treaty-verification community so work to identify new emitters and their impact on the IMS is critical to the international effort to monitor for nuclear explosions. This work presents a study of the phenomenon of consecutive <span><math><msup><mrow></mrow><mrow><mi>133</mi></mrow></msup></math></span>Xe detections (here referred to as ‘plumes’), which are frequently identified on the IMS. We consider the likelihood of a plume from various radionuclide release scenarios and conduct an analysis of a database of IMS measurement data, using the outputs of the automatic Radionuclide (RN) and Event Analysis Pipelines.</p></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"280 ","pages":"Article 107526"},"PeriodicalIF":1.9,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0265931X24001589/pdfft?md5=bbb23b63a110eb6cd7871e08ae8079ca&pid=1-s2.0-S0265931X24001589-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142145781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cobalt-60, Barium-133, Cesium-137, and Europium-152 migration from cementitious sources through sediment under field conditions","authors":"Reid F. Williams ,&nbsp;Daniel I. Kaplan ,&nbsp;Bryan J. Erdmann ,&nbsp;Timothy A. DeVol ,&nbsp;Brian A. Powell","doi":"10.1016/j.jenvrad.2024.107527","DOIUrl":"10.1016/j.jenvrad.2024.107527","url":null,"abstract":"<div><p>Safe and effective storage of radioactive waste is essential to protect human and environmental health. Due to the potential for accidental releases and the severity of the associated risks, it is imperative to further understand radionuclide transport should an accident occur. This study was the second set of measurements conducted in 2022 of an ongoing experiment that has analyzed the vadose zone migration of radionuclides from cementitious wasteforms at the Savannah River Site over the last ten years. The radionuclides introduced within the sources are prominent constituents of radioactive waste or analogs for other groups or series of radionuclides. Lysimeters were first analyzed in 2016 using a collimated high-purity germanium gamma-ray spectrometer to non-destructively measure the concentration of each radionuclide in the sediment column as a function of depth. Following these measurements, the lysimeters were redeployed for another 4 years. All radionuclides in all lysimeters were observed to transport further during the redeployment period; however, the extent of migration varied with the material used for introduction. Except for ¹³⁷Cs, migration through the sediment control system increased with decreasing ionic potential (ionic charge/radius); migration order: ¹⁵²Eu &lt; ¹³⁷Cs &lt; ⁶⁰Co &lt; ¹³³Ba. Overall, the cementitious wasteforms were observed to decrease radionuclide migration extent relative to natural vadose zone conditions. In both cementitious wasteforms, the migration extent increased in the order ¹⁵²Eu &lt; ¹³³Ba&lt;⁶⁰Co &lt; ¹³⁷Cs. However, less migration was measured when the radionuclides were incorporated into a reducing grout wasteform. The novelty of this paper is the demonstration of a technique capable of creating non-destructive measurements over decade time scales. Ultimately, this work provides insight into the long-term migration of alkali, alkali earth, divalent transition metal, and trivalent (<em>e.g.,</em> lanthanide and actinide element) isotopes.</p></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"280 ","pages":"Article 107527"},"PeriodicalIF":1.9,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Bioremediation of uranium enriched coal fly ash based on microbially induced calcite precipitation","authors":"Rehemanjiang Wufuer ,&nbsp;Jia Duo ,&nbsp;Wenfeng Li ,&nbsp;Shuzhi Wang ,&nbsp;Liang Pei ,&nbsp;Fan Yang","doi":"10.1016/j.jenvrad.2024.107523","DOIUrl":"10.1016/j.jenvrad.2024.107523","url":null,"abstract":"<div><p>Coal fly ash (CFA) is an essential raw material in brickmaking industry worldwide. There are some coal mines with a relatively high content of uranium (U) in the Xinjiang region of China that are yet understudied. The CFA from these coal mines poses substantial environmental risks due to the concentrated uranium amount after coal burning. In this paper, we demonstrated a calcifying ureolytic bacterium <em>Halomonas</em> sp. SBC20 for its biocementation of U in CFA based on microbially induced calcite precipitation (MICP). Rectangle-shaped CFA bricks were made from CFA using bacterial cells, and an electric testing machine tested their compressive strength. U distribution pattern and immobility against rainfall runoff were carefully examined by a five-stage U sequential extraction method and a leaching column test. The microstructural changes in CFA bricks were characterized by FTIR and SEM-EDS methods. The results showed that the compressive strength of CFA bricks after being cultivated by bacterial cells increased considerably compared to control specimens. U mobility was significantly decreased in the exchangeable fraction, while the U content was markedly increased in the carbonate-bound fraction after biocementation. Much less U was released in the leaching column test after the treatment with bacterial cells. The FTIR and SEM-EDX methods confirmed the formation of carbonate precipitates and the incorporation of U into the calcite surfaces, obstructing the release of U into the surrounding environments. The technology provides an effective and economical treatment of U-contaminated CFA, which comes from coal mines with high uranium content in the Xinjiang region, even globally.</p></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"279 ","pages":"Article 107523"},"PeriodicalIF":1.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142117635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Characterization of radon gas transmission rate in pore structures of different rock layers by radon daughters inversion calculation","authors":"Kaili Dong ,&nbsp;Xiaoyuan Liu ,&nbsp;Yulong Zhang ,&nbsp;Tianhe Kang ,&nbsp;Junfeng Wang","doi":"10.1016/j.jenvrad.2024.107525","DOIUrl":"10.1016/j.jenvrad.2024.107525","url":null,"abstract":"<div><p>Determining the transmission rate of radon gas in overburden strata is crucial for conducting a comprehensive study of radon gas's longitudinal and long-distance migration mechanisms. This study investigates the mineral components of rocks in the underground strata of the mining area using the X-ray diffraction method. Additionally, it examines the pore structure parameters of the rocks at different depths using the low-temperature nitrogen adsorption method. This research introduces an approach to inversion calculate the radon gas transmission rate through the activity ratio of radon's characteristic daughters based on the decay law and activity balance of ²¹⁰Po and ²¹⁰Pb daughters. In addition, it determines the transmission rates of radon gas in overlying strata at various depths through this method. The relationship between the rock's mineral composition and pore structure is investigated, and the effects of pore structure and mineral composition on the radon gas transmission rate are analyzed. The findings indicated that the pore structure exerts a dual impact on radon gas transport: macropores serve as channels for upward radon gas transport, while micropores offer most of the adsorption area. In contrast, the radon gas transmission rate is indirectly influenced by the mineral composition content associated with the medium's adsorption capacity and pore structure. In the studied lithologies, an increase in quartz content promotes radon gas transmission, while an increase in clay mineral content impedes it. Finally, the mechanisms of radon gas transport, daughter adsorption, and the impacts of rock pore structure and mineral composition on the radon transmission rate are discussed.</p></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"279 ","pages":"Article 107525"},"PeriodicalIF":1.9,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Impacts of vertical variations in soil properties on H*(10) simulations for 137Cs deposition","authors":"Xibo Ma,&nbsp;Hikaru Kobayashi","doi":"10.1016/j.jenvrad.2024.107524","DOIUrl":"10.1016/j.jenvrad.2024.107524","url":null,"abstract":"<div><p>Photon transport simulations based on the Monte Carlo method have played a crucial role in assessing and estimating the ambient dose equivalent rates H*(10), resulting from the deposition of ¹³⁷Cs in soil following the nuclear power plant accident in Fukushima. However, a comprehensive examination of the effect of vertical variations in soil properties on the simulation outcomes has not yet been performed. Disregarding the vertical distribution of soil properties not only leads to potential inaccuracies in the shielding responses of soil layers but also in the determination of the radioactive source inventory, particularly when using the concentration data in Bq/kg. These oversights diminish the reliability of the simulation results. This study addresses several soil property factors that could potentially influence the simulation results, including variations in chemical composition induced by water content, bulk density profile, and estimated inventory profile, all evaluated through an examined simulation model. The results show that inappropriate assignment of the soil density profile can cause considerable errors in the H*(10) simulation outcomes. Furthermore, the sensitivity of H*(10) to variations in soil vertical density is analyzed, with the results indicating that H*(10) can be highly sensitive to changes in the bulk density of the top 0–5 cm soil layers. These results should facilitate the establishment of appropriate simulation strategies and support the reassessment of past simulation results.</p></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"279 ","pages":"Article 107524"},"PeriodicalIF":1.9,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0265931X24001565/pdfft?md5=9f3b56261785e7e0766f3302774d7484&pid=1-s2.0-S0265931X24001565-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Decrease in radiocesium adsorption of illite induced by soil organic matter: Quantity or quality?","authors":"S. Staunton","doi":"10.1016/j.jenvrad.2024.107528","DOIUrl":"10.1016/j.jenvrad.2024.107528","url":null,"abstract":"<div><p>Organic matter blocks highly selective frayed edge sites on clay minerals and reduces radiocaesium adsorption. The effects of different soil organic matter on Cs adsorption on illite have been investigated. The quantity and quality of soil organic matter was varied by extracting from three contrasting soils and varying extraction conditions. Extracted organic matter was quantified, and analysed using UV and fluorescent spectroscopy. Cs adsorption was markedly lower in soil aqueous extracts, than in simple electrolyte solution at the same ionic strength (IS). Part of the decrease was attributed to soluble soil potassium. After correction for ionic strength and potassium, the relative distribution coefficient of Cs, Kd_IS,K, decreased with increasing dissolved organic carbon (DOC) concentration. The correlation between Kd_IS,K and DOC was largely unchanged by taking into account any of the measured spectral parameters. We find no evidence that molecular size and composition of organic coatings determine their effect on the Cs adsorption properties of illite.</p></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"279 ","pages":"Article 107528"},"PeriodicalIF":1.9,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Research on the influencing factors of radionuclide fractionation in surface nuclear explosions","authors":"Feifei Li,&nbsp;Wei Liu,&nbsp;Qiang Liu,&nbsp;Yangchao Li","doi":"10.1016/j.jenvrad.2024.107497","DOIUrl":"10.1016/j.jenvrad.2024.107497","url":null,"abstract":"<div><p>Fractionation plays an important role in the distribution of radioactive isotopes on particles formed in a nuclear explosion. This study examines the variables that affect radionuclide fractionation in surface nuclear explosions, including nuclear explosion yield, nuclear charge, solidification temperature, solidification time, and geological condition. The distribution of radionuclides is calculated using the improved Freiling radial-distribution model and the Bateman equation to describe radionuclide decay. Quantitative analysis is conducted to examine the impact of various influencing factors on the total <em>β</em> radioactivity. Specifically, the mass chains 89 and 137, as well as mass chains 95 and 144, which represent the radioactive surface and volume distributions are investigated respectively. The results show that the total <span><math><mrow><mi>β</mi></mrow></math></span> radioactivity increases as the explosion yield increases and as the solidification temperature decreases, and increases slightly as the solidification time increases. The radioactivity will concentrate more on the larger size particles under harder geological conditions. The influencing factors have greater impacts on the radioactive volume distributions than on the surface distributions, and the variations in distinct mass chains under the same influencing factors are inconsistent. Overall, the solidification temperature and the geological condition have significant impacts on the distribution of particle radioactivity, followed by the effects of explosion yield and nuclear charge. The distribution of particle radioactivity is not significantly affected by the solidification time.</p></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"279 ","pages":"Article 107497"},"PeriodicalIF":1.9,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142045093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Comparative analysis of the dispersion modeling and dose projection results performed under BARCO international project","authors":"Yu. Balashevska ,&nbsp;Yu. Kyrylenko ,&nbsp;Z. Ivanov ,&nbsp;F. Rocchi ,&nbsp;A. Cervone ,&nbsp;A. Guglielmelli ,&nbsp;M. Ilvonen ,&nbsp;J. Rossi ,&nbsp;A. Slavickas ,&nbsp;H. Thielen","doi":"10.1016/j.jenvrad.2024.107513","DOIUrl":"10.1016/j.jenvrad.2024.107513","url":null,"abstract":"<div><p>Radiological assessments on zones to take protective actions in case of a nuclear or radiological emergency involve a series of real-time forecasts of radiological impact on the public at various distances from the release point, using actual weather or forecast data, information on the source term or facility status, and primary radiation monitoring data. This practice is implemented during the operation of emergency centers around the world in order to promptly report the occurrence and possible consequences of radiological accidents in the country and abroad in the event of a possible transboundary impact. Since the Chornobyl disaster, a lot of emergency exercises, research programs and projects, in particular, benchmarking, have served as international platforms for improving modeling capacity in atmospheric dispersion. This activity is carried out both on the basis of past severe accidents with significant atmospheric releases and corresponding radiological consequences, and on the basis of specific conditional (hypothetical) events that are developed in accordance with the purpose of the study. The paper is focused on the comparison results performed under the international project “Benchmarking on Assessment of Radiological COnsequences” (BARCO) conducted in 2020–2021 between five technical support organisations – members of the European Technical Safety Organisations Network (ETSON). The work contains a short overview of relevant international activity conducted in the past, a description of the BARCO project and its objectives, a list of participants, project tasks, initial data (source term, meteorology, list of benchmarking quantities, approach to data exchange, codes used). The study presents some of comparative analysis results obtained via two techniques such as code-to-code analysis (CTCA) and matched-pair analysis (MPA). The results discussion concentrates on the overall recommendations for code users. Conclusions provide the main outputs of the project.</p></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"279 ","pages":"Article 107513"},"PeriodicalIF":1.9,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141997422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}