Abstract:
:In this study, nanoscale zero valent iron I-NZVI was investigated as a remediation strategy for uranium contaminated groundwater from the former Cimarron Fuel Fabrication Site in Oklahoma, USA. The 1 L batch-treatment system was applied in the study. The result shows that 99.9% of uranium in groundwater was removed by I-NZVI within 2 h. Uranium concentration in the groundwater stayed around 27 μg/L, and there was no sign of uranium release into groundwater after seven days of reaction time. Meanwhile the release of iron was significantly decreased compared to NZVI which can reduce the treatment impact on the water environment. To study the influence of background pH of the treatment system on removal efficiency of uranium, the groundwater was adjusted from pH 2-10 before the addition of I-NZVI. The pH of the groundwater was from 2.1 to 10.7 after treatment. The removal efficiency of uranium achieved a maximum in neutral pH of groundwater. The desorption of uranium on the residual solid phase after treatment was investigated in order to discuss the stability of uranium on residual solids. After 2 h of leaching, 0.07% of the total uranium on residual solid phase was leached out in a HNO3 leaching solution with a pH of 4.03. The concentration of uranium in the acid leachate was under 3.2 μg/L which is below the EPA's maximum contaminant level of 30 μg/L. Otherwise, the concentration of uranium was negligible in distilled water leaching solution (pH = 6.44) and NaOH leaching solution (pH = 8.52). A desorption study shows that an acceptable amount of uranium on the residuals can be released into water system under strong acid conditions in short terms. For long term disposal management of the residual solids, the leachate needs to be monitored and treated before discharge into a hazardous landfill or the water system. For the first time, I-NZVI was applied for the treatment of uranium contaminated groundwater. These results provide proof that I-NZVI has improved performance compared to NZVI and is a promising technology for the restoration of complex uranium contaminated water resources.
journal_name
J Environ Radioactjournal_title
Journal of environmental radioactivityauthors
Jing C,Landsberger S,Li YLdoi
10.1016/j.jenvrad.2017.04.003subject
Has Abstractpub_date
2017-09-01 00:00:00pages
1-6eissn
0265-931Xissn
1879-1700pii
S0265-931X(16)30674-9journal_volume
175-176pub_type
杂志文章abstract::Beryllium-7 (7Be) has been used as a sediment tracer to evaluate soil redistribution rates at hillslopes and as a tool to estimate sediment residence time in river systems. A key assumption for the use of 7Be as a sediment tracer is the rapid and irreversible sorption of 7Be upon contact with the soil particles. Howev...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2017.11.018
更新日期:2018-02-01 00:00:00
abstract::Temporal variations of (7)Be, (210)Pb and (137)Cs activity concentrations in precipitation in Monaco from 1998 to 2010 showed that maxima of (7)Be and (210)Pb deposition fluxes coincide with the peaks of precipitation amounts observed in different months of a year, and most of (7)Be and (210)Pb was washout from the at...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2012.12.007
更新日期:2013-06-01 00:00:00
abstract::Soil gas 222Rn and 220Rn concentrations were measured at 18 locations in the Karkonosze-Izera Block area in southwestern Poland. Measurements were carried out in surface air and at sampling depths of 10, 40 and 80 cm. Surface air 222Rn concentrations ranged from 4 to 2160 Bq m(-3) and 220Rn ranged from 4 to 228 Bq m(-...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2006.11.001
更新日期:2007-01-01 00:00:00
abstract::Samples of phosphate fertilizers and farm soils, taken to a depth of up to 30 cm in cultivated land, were collected over the Qena governorate, Upper Egypt. Activity concentration of background radionuclides such as (226)Ra, (232)Th and (40)K of these samples were determined by gamma-ray spectrometry. The results show ...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2005.04.007
更新日期:2005-01-01 00:00:00
abstract::Radionuclides from the 1986 Chernobyl accident were released and dispersed during a limited period of time, but under widely varying weather conditions. As a result, there was a high geographical variation in the deposited radioactive fallout per unit area over Europe, depending on the released composition of fission ...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2015.07.009
更新日期:2015-11-01 00:00:00
abstract::On 11 March 2011, the magnitude-9.0 earthquake and a substantial tsunami struck off the northeast coast of Japan. The Fukushima nuclear power plants were inundated and stricken, followed by radionuclide releases outside the crippled reactors. Provisional regulation values for radioactivity in food and drink were set o...
journal_title:Journal of environmental radioactivity
pub_type: 历史文章,杂志文章
doi:10.1016/j.jenvrad.2011.08.008
更新日期:2012-09-01 00:00:00
abstract::Multitracers were used to study water mixing in the Paraíba do Sul River estuary region in August 2007 (dry season) and March 2008 (rainy season) and to evaluate the reach of the river plume in the direction of the open ocean. Two sampling campaigns were carried out, each in a different season. Based on these results,...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2009.11.001
更新日期:2010-07-01 00:00:00
abstract::There is a continual supply of new experimental data that are relevant to the assessment of the potential impacts of nuclear fuel waste disposal. In the biosphere, the traditional assessment models are data intensive, and values are needed for several thousand parameters. This is augmented further when measures of cen...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章,meta分析
doi:10.1016/j.jenvrad.2006.03.003
更新日期:2006-01-01 00:00:00
abstract::The main purpose of this study is to examine possible impacts and consequences of a hypothetical accident at the Kola nuclear plant in north-west Russia on different geographical regions: Scandinavia, central Europe, European FSU and Taymyr. The period studied is 1991-1996. An isentropic trajectory model has been used...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/s0265-931x(01)00094-7
更新日期:2002-01-01 00:00:00
abstract::Radon concentrations were continuously measured outdoors, in the living room and in the basement at 10 min intervals for a month. Radon time series were analyzed by comparing algorithms to extract phase space dynamical information. The application of fractal methods enabled exploration of the chaotic nature of radon i...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2003.10.007
更新日期:2004-01-01 00:00:00
abstract::Eight documented tritiated targets were stored, as well as some very old targets with unknown activity, in a room equipped with an ING-114 14 MeV fast neutron generator. When the neutron generator was running, the tritiated targets were irradiated with a deuterium beam. The aim of this work is to determine the tritium...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2020.106218
更新日期:2020-06-01 00:00:00
abstract::Data on content of (90)Sr, (137)Cs, (239,240)Pu and (3)H in water of the Tobol-Irtysh part of the Techa-Iset-Tobol-Irtysh-Ob river system (through which the "Mayak" PA radioactive wastes are transported) are presented and discussed. The data were received in 2004-2005 under the ISTC project on radioecological monitori...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2007.01.023
更新日期:2007-01-01 00:00:00
abstract::Allometry, or the biology of scaling, is the study of size and its consequences. It has become a useful tool for comparative physiology. There are several allometric equations that relate body size to many parameters, including ingestion rate, lifespan, inhalation rate, home range and more. While these equations were ...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/S0265-931X(02)00116-9
更新日期:2003-01-01 00:00:00
abstract::We developed a new gamma camera specifically for plant nutritional research and successfully performed live imaging of the uptake and partitioning of (137)Cs in intact plants. The gamma camera was specially designed for high-energy gamma photons from (137)Cs (662 keV). To obtain reliable images, a pinhole collimator m...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2015.04.009
更新日期:2016-01-01 00:00:00
abstract::Various studies indicated more or less recently that organically bound tritium (OBT) formed from gaseous or liquid tritium releases into the environment potentially accumulates in organisms contradicting hypotheses associated to methods used to assess the biological impact of tritium on humans (ASN, 2010). Increasing ...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章,评审
doi:10.1016/j.jenvrad.2017.11.001
更新日期:2018-01-01 00:00:00
abstract::Soil erosion represents an important threat to the long-term sustainability of agriculture and forestry in many areas of the world, including southern Italy. Numerous models and prediction procedures have been developed to estimate rates of soil loss and soil redistribution, based on the local topography, hydrometeoro...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2011.11.005
更新日期:2012-04-01 00:00:00
abstract::Vegetation-to-milk transfer coefficients for 137Cs, 90Sr and stable strontium were determined for cows grazing on two intensively managed lowland pastures and two Alpine pastures in Austria. The 90Sr transfer coefficient at the four pastures ranged from 0.0005 to 0.0012 dl-1 and correlated with the stable strontium tr...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/s0265-931x(00)00133-8
更新日期:2001-01-01 00:00:00
abstract::Three kinetic models for adsorption/release of (137)Cs between water and sediments have been tested when they are included in a previously validated dispersion model of the English Channel. Radionuclides are released to the Channel from La Hague nuclear fuel reprocessing plant (France). The kinetic models are a 1-step...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/S0265-931X(03)00172-3
更新日期:2004-01-01 00:00:00
abstract::The methodology for estimating radiocaesium distribution between solid and liquid phases in lakes is applied for three prealpine lakes: Lake Constance (Germany), Lake Lugano (Switzerland) and Lake Vorsee (Germany). It is based on use of the exchangeable distribution coefficient and application of the exchangeable radi...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/s0265-931x(01)00075-3
更新日期:2002-01-01 00:00:00
abstract::The Southern Yellow Sea (SYS) is suffering from the increasing environment problems, such as the recurrent algal bloom. The 210Po/210Pb disequilibrium is very useful for assessing particulate organic matter dynamics during phytoplankton blooming. In this study, 23 surface samples were collected from the SYS after the ...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2019.05.017
更新日期:2019-10-01 00:00:00
abstract::Several multi-day samplings were conducted over a 2-year period from an oil shale-fired power plant operating with pulverized fuel type of boilers that were equipped with either novel integrated desulphurization system and bag filters or with electrostatic precipitators. Oil shale, bottom ash and fly ash samples were ...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2016.10.005
更新日期:2017-07-01 00:00:00
abstract::This paper addresses some fundamental problems related to the structure and function of catchment areas in general and for seasonal (weekly, monthly) mass balance calculations of radionuclides (and metals, organics and nutrients) in particular. A new catchment area model has been developed and critically tested. This ...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2003.10.003
更新日期:2004-01-01 00:00:00
abstract::This study considers UK airborne gamma-ray data obtained through a series of high spatial resolution, low altitude surveys over the past decade. The ground concentrations of the naturally occurring radionuclides Potassium, Thorium and Uranium are converted to air absorbed dose rates and these are used to assess terres...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2014.08.025
更新日期:2014-12-01 00:00:00
abstract::Procedures to determine the release of hazardous gaseous substances including radioactive iodine are covered by different norms such as the European standard EN 14175 and the German national standard DIN 25466. The detection of sulphur hexafluoride (SF6) is required to comply with the prescribed methodology. The detec...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2016.01.006
更新日期:2017-01-01 00:00:00
abstract::Air samples were taken at various locations around The University of Texas at Austin's TRIGA Mark II research reactor and analyzed to determine the concentrations of 37Ar, 41Ar, and 133Xe present. The measured ratio of 37Ar/41Ar and historical records of 41Ar releases were then utilized to estimate an annual average r...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2016.11.017
更新日期:2017-02-01 00:00:00
abstract::Thorium levels and their association with Fe, Sc, Ca, and Particulate Organic Carbon (POC) were researched in sediments of the Vigo Ria in order to assess the influence of radioactive gneisses from the neighbouring continental Galiñeiro Complex. Sediment of 50 surface samples and 1 core was analysed by ICP-MS and the ...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2008.06.008
更新日期:2008-10-01 00:00:00
abstract::Aerial gamma-ray surveying uses NaI(Tl) detectors mounted in small aircraft to measure gamma radiation, emitted from the earth's surface. The data are collected as gamma-ray spectra, typically with 1 s counting times, from which are derived K, U and Th concentrations in the ground. Applications of aerial surveying inc...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2004.03.028
更新日期:2004-01-01 00:00:00
abstract::India has a long-term program of wide spread applications of nuclear radiations and radioactive sources for peaceful applications in medicine, industry, agriculture and research and is already having several thousand places in the country where such sources are being routinely used. These places are mostly outside the...
journal_title:Journal of environmental radioactivity
pub_type: 历史文章,杂志文章,评审
doi:10.1016/S0265-931X(03)00190-5
更新日期:2004-01-01 00:00:00
abstract::This study was conducted to assess radiocesium accumulation in birds after the accident at Tokyo Electric Power Company's Fukushima Daiichi Nuclear Power Station in 2011, with a particular focus on 137Cs, which has a long physical half-life. Results of 137Cs monitoring in four game bird species including two pheasant ...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2018.10.016
更新日期:2019-02-01 00:00:00
abstract::This article compares and discusses the ability of two different models to reproduce the observed temporal variability in grass (14)C activity in the vicinity of AREVA-NC La Hague nuclear fuel reprocessing plant in France. These two models are the TOCATTA-χ model, which is specifically designed for modelling transfer ...
journal_title:Journal of environmental radioactivity
pub_type: 杂志文章
doi:10.1016/j.jenvrad.2015.05.015
更新日期:2015-09-01 00:00:00