| 中国西南乌江流域石灰土中微量金属的富集 |
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| 引用本文： | 宋照亮,杨成,吴永锋.中国西南乌江流域石灰土中微量金属的富集[J].地球与环境,2008,36(2). |
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| 作者姓名： | 宋照亮 杨成 吴永锋 |
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| 作者单位： | 1. 浙江林学院环境科技学院,浙江,临安,311300;中国科学院地球化学研究所环境地球化学国家重点实验室,贵州,贵阳,550002
2. 中国科学院地球化学研究所环境地球化学国家重点实验室,贵州,贵阳,550002 |
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| 基金项目： | 浙江林学院校科研和教改项目
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中国科学院知识创新工程项目
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国家重点基础研究发展计划(973计划) |
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| 摘 要： | 为了解石灰土中微量金属的富集特征、机理及供给能力,本文以乌江流域9条石灰岩风化剖面为对象,运用R型聚类分析和质量平衡计算方法,研究了石灰岩风化过程中V、Co、Ni和Zn的富集问题,并获得了以下认识:(1)本区石灰土中V、Co、Ni和Zn的富集程度与其它地区的石灰土相当(甚至更高),高于上陆壳(UCC)、中国土壤(CS)和世界土壤(WS);(2)V、Co和Zn在石灰土中的富集主要与铁氧化物/氢氧化物等的吸附或共沉淀产生的淀积富集有关,而Ni的富集则主要与铝硅酸盐黏土矿物吸附和其它更易溶元素强烈迁出引起的弱残留富集有关。
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| 关 键 词： | 微量金属 富集 供给 石灰土 风化 乌江流域 |
ENRICHMENT OF TRACE METALS IN CALCAREOUS SOILS FROM THE WUJIANG CATCHMENT, SOUTHWEST CHINA |
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| SONG Zhao-liang,YANG Cheng,WU Yong-feng.ENRICHMENT OF TRACE METALS IN CALCAREOUS SOILS FROM THE WUJIANG CATCHMENT, SOUTHWEST CHINA[J].Earth and Environment,2008,36(2). |
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| Authors: | SONG Zhao-liang YANG Cheng WU Yong-feng |
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| Abstract: | Nine limestone weathering profiles from Wujiang catchments were selected for studying enrichment of trace metals during limestone weathering with methods of Rtype hierachical cluster analysis and mass balance calculation.The results showed that our calcareous soils have similar enrichment degree of V,Co,Ni and Zn with those from other areas(even higher),and higher than upper continental crust(UCC),China soil(CS) and world soil(WS).The enrichment of V,Co and Zn is often a result of supergene enrichment mechanism caused by adsorption or co-precipitation with phases such as Fe-oxides/hydroxides,while that of Ni is mainly related with a weak residual enrichment mechanism caused by intense leaching of other more soluble components. |
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| Keywords: | trace metal enrichment calcareous soil weathering Wujiang catchment |
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