某工业园区表层土壤稀土元素地球化学特征  

Geochemical characteristics of rare earth elements in surface soil of an industrial park

作　　者：查春雷 袁二军 史立群 彭红明 丛殿阁 徐建东 屈宏飞 ZHA Chunlei;YUAN Erjun;SHI Liqun;PENG Hongming;CONG Diange;XU Jiandong;QU Hongfei(School of Geological Engineering,Qinghai University,Xining,810016,China;Qinghai Bureau of Environmental Geology Exploration,Qinghai Engineering Research Center of Geoenvironment Protection and Geohazard prevention,Xining,810001,China;Qinghai 906 Engineering Survey and Design Institute,Xining,810001,China;State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University,Xining,810016,China)

机构地区：[1]青海大学地质工程学院,西宁810016 [2]青海省环境地质勘查局/青海省地质环境保护与地灾害防治工程技术研究中心,西宁810001 [3]青海九零六工程勘察设计院有限责任公司,西宁810001 [4]青海大学省部共建三江源生态与高原农牧业国家重点实验室,西宁810016

出　　处：《环境化学》2024年第8期2695-2703,共9页Environmental Chemistry

基　　金：湟水河流域护坡植物降盐效应及其增强边坡稳定性研究项目(k152407)资助.

摘　　要：为探究某工业园区表层土壤中稀土元素的地球化学特征,了解其物质来源及影响因素,采集工业园区周边表层土壤样品,分析稀土元素的含量及空间分布特征,研究稀土元素的配分模式及特征参数,并探讨稀土元素的影响因素.结果表明:稀土元素总含量(WREE)范围为52.38—155.78 mg·kg^(−1),平均值105.02 mg·kg^(−1),空间分布特征显示稀土元素含量大体上呈现出南高北低的特征;球粒陨石标准化曲线表现为向右倾斜,轻稀土元素富集,重稀土元素亏损;δCe范围为1.00—1.09,平均值1.04,存在轻微的正异常;δEu范围为0.65—0.76,平均值0.71,存在一定的负异常;(La/Yb)N范围为5.96—10.01,平均值7.86,轻重稀土元素之间存在显著的分异现象;(La/Sm)N范围为2.98—4.24,平均值3.42,(Gd/Yb)N范围为1.41—1.92,平均值1.65,轻稀土元素存在明显的分馏,重稀土元素分馏程度较低;研究区的成土母质是影响土壤稀土元素含量的主要因素,化学风化活动和矿物导致了轻重稀土元素的分异,人类活动影响了研究区土壤中稀土元素的空间分布,表明土壤中稀土元素主要来自于自然因素,但后期人类活动也会使其在空间上产生分异.To explore the geochemical characteristics of rare earth elements in the surface soil of an industrial park,understand their material sources and influencing factors,the surface soil samples around the industrial park were collected,and the content and spatial distribution characteristics of rare earth elements were analyzed.The distribution pattern and characteristic parameters of rare earth elements were studied,and the influencing factors of rare earth elements were discussed.The results showed that the total content of rare earth elements(WREE)ranged from 52.38 to 155.78 mg·kg^(−1),with an average value of 105.02 mg·kg^(−1).The spatial distribution characteristics showed that the content of rare earth elements was generally high in the south and low in the north.The standardization curve of chondrite is inclined to the right,light rare earth elements are enriched,and heavy rare earth elements are deficient.δCe ranges from 1.00 to 1.09,with a mean value of 1.04,and there are slight positive anomalies.δEu ranges from 0.65 to 0.76,with an average value of 0.71,with some negative anomalies.(La/Yb)N ranges from 5.96 to 10.01,with an average value of 7.86.(La/Sm)N ranges from 2.98 to 4.24 with an average value of 3.42,(Gd/Yb)N ranges from 1.41 to 1.92 with an average value of 1.65.There is obvious fractionation of light rare earth elements,and the fractionation degree of heavy rare earth elements is low.The soil parent material in the study area is the main factor affecting the content of rare earth elements in the soil.Chemical weathering activities and minerals lead to the differentiation of light and heavy rare earth elements.Human activities affect the spatial distribution of rare earth elements in the soil of the study area,indicating that rare earth elements in the soil mainly come from natural factors,but later human activities will also make it spatially differentiated.

关 键 词：工业园区 土壤 稀土元素 空间分布 影响因素. 

分 类 号：P595[天文地球—地球化学] X-1[天文地球—地质学] O6[环境科学与工程]