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  • 1
    Electronic Resource
    Electronic Resource
    Preparation of multitracer nuclides from UO2 (NO3)2 irradiated by40Ar ion beam (1996)
    Springer
    Journal of radioanalytical and nuclear chemistry 214 (1996), S. 89-94 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract UO2 (NO3)2 was irradiated with a 25 MeV/nucleon40Ar ion beam. The target material irradiated was dissolved in ethyl ether, and the uranyl was removed from the back extractant 5M HNO3 saturated with NH4NO3 by means of solvent extraction with TBP in CCl4. A carrier-free multitracer solution containing 47 elements from Na to Bi and 83 radionuclides was prepared and has been applied to adsorption studies on alumina and soils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164809
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Sorption and desorption of radioselenium on calcareous soil and its solid components (1966)
    Springer
    Journal of radioanalytical and nuclear chemistry 214 (1966), S. 245-254 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The effect of different solid soil components of calcareous soils on the retention of SeO3 has been investigated by a batch technique and selective extraction method. The sorption and desorption isotherms of SeO3 on the untreated calcareous soil and the three treated soils were determined at 20°C, pH 7.8±0.2 and in the presence of 0.001M CaCl2. It was found that all isotherms are linear, the sorption-desorption hysteresis for untreated soil and treated soils is obvious and the retention of SeO3 in calcareous soil is mainly attributed to the oxides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02163253
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Global coastal groundwater and subterranean estuary nutrients (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: These data were compiled from original and published datasets of coastal groundwater / subterranean estuary research efforts along global coastline (sites within 1km of shoreline). The dataset includes sampling site names, locations, original sample information, sample depth, temperature, salinity, dissolved nitrogen concentrations, and dissolved phosphorus concentrations. The data source or curator is also included in the dataset.
    Keywords: biogeochemistry; groundwater; nutrients; subterranean estuary
    Type: Dataset
    Format: application/vnd.ms-excel.sheet.macroenabled.12, 1.4 MBytes
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    DATA PANGAEA
  • 4
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    Karstic submarine groundwater discharge into the Mediterranean: Radon-based nutrient fluxes in an anchialine cave and a basin-wide upscaling (2020)
    Elsevier
    Details
    Publication Date: 2023-02-08
    Description: Anchialine caves are common in Mediterranean karstic shorelines and elsewhere, delivering point-source fresh groundwater and nutrients to the coastal ocean. Here, we first quantified submarine groundwater discharge (SGD) in a typical karstic system (Zaton Bay, Croatia) receiving groundwater from anchialine caves using a radon (222Rn) mass balance model. We then combine our new observations with the literature to provide a Mediterranean-scale estimate of karstic fresh SGD nutrient fluxes. We found that SGD and related nutrient fluxes in the upper brackish layer were much higher than those in the underlying layer in Zaton Bay. In the upper brackish layer, both SGD (m d−1) and associated nutrient fluxes (mmol m−2 d−1) in the wet season (SGD: 0.29–0.40; DIN: 52; DIP: 0.27) were significantly higher than those in the dry season (SGD: 0.15; DIN: 22; DIP: 0.08). Red tides were observed in the wet season but not in the dry season. Nutrient budgets imply that SGD accounted for 〉98% of the total dissolved inorganic nitrogen (DIN) and phosphorous (DIP) sources into Zaton Bay. These large SGD nutrient fluxes with high N/P ratios (190–320) likely trigger and sustain red tide outbreaks. Combining our results with 30 previous studies in the region revealed that point-source DIN and DIP fluxes via karstic fresh SGD may account for 8–31% and 1–4%, respectively, of riverine inputs in the Mediterranean Sea. Overall, we demonstrate the importance of karstic SGD as a source of new nutrients with high N/P ratios to the Mediterranean Sea and emphasize how SGD lagging precipitation can drive red tide outbreaks.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    Temporal Variations of Atmospheric Depositional Fluxes of 7Be and 210Pb over 8 years (2006-2013) at Shanghai, China and Synthesis of Global Fallout Data (2015)
    Wiley-Blackwell
    Details
    Publication Date: 2015-03-29
    Description: 7 Be and 210 Pb, two atmospherically delivered radionuclides, have been broadly applied to study the processes including air mass transport, soil erosion and particle cycling in aqueous systems. These studies require temporal variations of their depositional fluxes. In the present work, monthly atmospheric bulk depositional fluxes of 7 Be and 210 Pb were measured over 8 years (December 2005 to December 2013) at Shanghai, China. The bulk depositional fluxes of 7 Be and 210 Pb varied from 17.9 to 421 Bq m -2 month -1 and 6.8 to 82.1 Bq m -2 month -1 , respectively. The volume-weighted activities ranged from 0.20 to 8.06 Bq L -1 for 7 Be and 0.05 to 3.40 Bq L -1 for 210 Pb. There were strong seasonal variations in the depositional fluxes of these nuclides. The seasonal fraction of depositional fluxes was 〉30% of the total annual depositional fluxes of 210 Pb in winter and 7 Be in spring. The lowest depositional fluxes were found in summer for both radionuclides, with precipitation-normalized enrichment factor ( α ) values of 〈 1.0. The results from the synthesis of global fallout data indicate that there are latitudinal variations in the maximum depositional fluxes and volume-weighted activities of 7 Be, both values increase with latitude from the equator to the mid-latitudes. The 210 Pb depositional fluxes increase with the distance from the coast in inland regions (distance from the coast 〉 50 km) and increase with the amount of precipitation in onshore region (distance from the coast ≤ 50 km).We also report that Shanghai, China has the second highest bulk depositional fluxes of 210 Pb in literature.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley-Blackwell on behalf of American Geophysical Union (AGU).
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    PAPER CURRENT
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