| 李石朋,冯志刚*,唐振平.岩溶环境中土壤剖面富铀行为的初步研究[J].南华大学学报(自然科学版),2012,26(4):18~24.[LI Shi-peng,FENG Zhi-gang*,TANG Zhen-ping.The Preliminary Study on Enrichment Behavior of Uranium in Soil Profiles under the Karst Environment[J].Journal of University of South China(Science and Technology),2012,26(4):18~24.] |
| 岩溶环境中土壤剖面富铀行为的初步研究 |
| The Preliminary Study on Enrichment Behavior of Uranium in Soil Profiles under the Karst Environment |
| 投稿时间：2012-11-14 |
| DOI： |
| 中文关键词: 铀 岩溶区 石灰土 富集 贵州 |
| 英文关键词:uranium karst region limestone soil enrichment Guizhou Province |
| 基金项目:国家自然科学基金项目资助(40973070) |
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| 中文摘要: |
| 选择黔中地区的4条石灰土剖面作为研究对象，经过精细采样分析，讨论了石灰土形成过程中U富集的地球化学特征及其对生态环境存在的潜在风险.结果表明：1)岩—土界面是U既发生大量淋失而又产生显著富集的重要地球化学场所；2)处于中性条件下的石灰土剖面，释放的U优先与风化流体中的CO32-发生络合而进一步迁移淋失；3)石灰土剖面既是表生介质中重要的U储库，又是U的重要次生释放源，剖面的进一步演化将对环境生态构成潜在的放射性危害. |
| 英文摘要: |
| Four limestone soil profiles were selected as the subject investigated in Middle Guizhou.Through careful sampling and analyzing,this paper discussed geochemical characteristics of U and its potential risk on superficial environment.The results show:1) the rock-soil interface is a main place for geochemical reaction,where U is both leached plentifully and markedly relatively richened;2) when pH is neutral,U released from limestone soil profiles is preferentially complexed with CO32- of weathering solution and further leached;3) limestone soils are important reservoirs as well as secondary releasing origins of U in superficial media.Further development of profiles will pose potential radioactive risk on ecological environment. |
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