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为研究采矿对土壤-植被REE生物地球化学特征的影响,采集大宝山多金属矿区及背景区土壤及优势植物芒萁、马尾松叶片,测量REE含量.对比分析样品中REE分布模式、∑REE、δEu、δCe及四重效应等地球化学特征.结果表明:受采矿活动影响,矿区土壤REE含量均值达284.99mg/kg,显著高于背景区,且表土层REE含量明显高于心土层;相对于背景区,矿区土壤和植被轻重稀土分馏更弱;研究区土壤和植被都为Eu亏损,大都为Ce富集,马尾松与土壤REE含量呈正相关,REE富集植物芒萁在背景区富集系数反而更高;矿区环境抑制植物对REE正常的迁移和分异,对植被生长不利,植被REE分布分异特征是其对生长环境的反映和适应.
In order to study the effect of mining on the biogeochemical characteristics of REE in soils, the REE content of the soil and dominant plants, such as the leaves and the dominant species, Manglietia macranthoides and Pinus massoniana collected from the Dabashan polymetallic mining area and the background area were analyzed.The REE distribution patterns, ΣREE, δEu, δCe and quadruple effect.The results show that the average REE content in the mining area reaches 284.99 mg / kg, which is significantly higher than that in the background area and the content of REE in the topsoil is obviously higher than that in the core soil. In the background area, fractionation of light and heavy rare earths in soil and vegetation in the mining area was weaker. The soil and vegetation in the study area were depleted in Eu, mostly in the enrichment of Ce, and positively correlated with the REE content of the soil in Masson pine and enriched in the REE- But the coefficient is higher. The normal migration and differentiation of REEs in the mining environment and the unfavorable vegetation growth are the characteristics of REE distribution in the mining area, which reflect and adapt to the growth environment.