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A Pb-210(ex) mass balance model in cultivated soils in consideration of the radionuclide diffusion
Zhang Yun-Qi1,2; Zhang Xin-Bao3; Long Yi3
Corresponding AuthorZhang Yun-Qi
2014-08-01
Source PublicationNUCLEAR SCIENCE AND TECHNIQUES
ISSN1001-8042
Volume25Issue:4Pages:040303-1-040303-6
SubtypeArticle
AbstractThe existing Pb-210(ex) mass balance models for the assessment of cultivated soil erosion are based on an assumption that Pb-210(ex) is quite evenly mixed within the plough layer. However, the amount of Pb-210(ex) distributed in the soils below the plough depth, like a downward tail in the lower part of the Pb-210(ex) profile, has been largely ignored. In fact, after the initial cultivation of undisturbed soils, Pb-210(ex) will diffuse downward from plough layer to the plough pan layer due to the concentration gradient. Assuming Pb-210(ex) inventory is constant, the depth distribution in the two layers of the cultivated soils will achieve a steady state after continuous cultivation for 10.37 years, when Pb-210(ex) is evenly distributed in the soils of the plough layer with an exponential concentration decline with depth in the soils of the plough pan layer, and the Pb-210(ex) concentration at any depth will be invariable with time. The work reported in this paper attempts to explain the formation of the Pb-210(ex) tail in the soil profile below the plough depth by theoretical derivation of the Pb-210(ex) depth distribution process in the two layers of the cultivated soils, propose a Pb-210(ex) mass balance model considering Pb-210(ex) diffusion based on the existing model, and discuss the influence of the Pb-210(ex) tail to the existing model.
KeywordCultivated Soils Pb-210(Ex) Depth Distribution Diffusion Mass Balance Model Soil Erosion
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.13538/j.1001-8042/nst.25.040303
URL查看原文
WOS Subject ExtendedNuclear Science & Technology ; Physics
Indexed BySCI
WOS KeywordSICHUAN HILLY BASIN ; EROSION RATES ; ENVIRONMENTAL RADIONUCLIDES ; REDISTRIBUTION RATES ; AGRICULTURAL SOILS ; VERTICAL MIGRATION ; FALLOUT CS-137 ; SEDIMENTATION ; HILLSLOPES ; CATCHMENT
Language英语
WOS SubjectNuclear Science & Technology ; Physics, Nuclear
WOS IDWOS:000342265200008
CSCD IDCSCD:5243726
Funding OrganizationNational Natural Science Foundation of China(41102224 ; 41101259)
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/9955
Collection山地表生过程与生态调控重点实验室
Affiliation1.Sichuan Agr Univ, Chengdu 611830, Peoples R China
2.Linyi Univ, Shandong Prov Key Lab Water & Soil Conservat & En, Linyi 276000, Peoples R China
3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
Recommended Citation
GB/T 7714
Zhang Yun-Qi,Zhang Xin-Bao,Long Yi. A Pb-210(ex) mass balance model in cultivated soils in consideration of the radionuclide diffusion[J]. NUCLEAR SCIENCE AND TECHNIQUES,2014,25(4):040303-1-040303-6.
APA Zhang Yun-Qi,Zhang Xin-Bao,&Long Yi.(2014).A Pb-210(ex) mass balance model in cultivated soils in consideration of the radionuclide diffusion.NUCLEAR SCIENCE AND TECHNIQUES,25(4),040303-1-040303-6.
MLA Zhang Yun-Qi,et al."A Pb-210(ex) mass balance model in cultivated soils in consideration of the radionuclide diffusion".NUCLEAR SCIENCE AND TECHNIQUES 25.4(2014):040303-1-040303-6.
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