云浮硫铁矿开采对周边表土稀土元素影响研究

发布时间：2019-07-10 11:34

【摘要】：稀土元素(REEs)作为微量元素地球化学行为的示踪剂,能有效反映土壤环境变化。为了评价云浮硫铁矿开采、利用过程中对周边表土REEs含量及空间分布的影响,本文采用酸溶法利用ICP-MS测定了采自云浮硫铁矿周边57个表土和2个粉尘样品的16种稀土元素含量,并通过统计分析、克里格空间差值和因子分析等法探讨了其可能来源及空间分布的影响因素。结果表明,硫铁矿开采过程中产生的酸性废水和粉尘是影响矿区周边表土稀土元素空间分布的主要因素。轻稀土元素及重稀土元素Gd的空间分布特征相似,主要受来自矿区粉尘的影响;重稀土元素(Gd除外)具有相似的空间分布规律,可能受来自尾矿区酸性废水的影响。Eu*的负异常和Ce*的正异常主要受华南湿热的氧化条件影响,但采矿导致的土壤酸化也是Ce*正异常的重要影响因素;因此,稀土元素对硫铁矿矿区周边土壤环境的变化具有重要的指示意义,且可为污染土壤修复提供指导。
[Abstract]:The rare earth element (REEs), as a tracer of the geochemical behavior of trace elements, can effectively reflect the change of soil environment. In order to evaluate the influence of the content of the surface soil REEs and the spatial distribution during the exploitation and utilization of the Yunfu Pyrite, the content of 16 rare-earth elements from 57 top soil and 2 dust samples from the periphery of the Yunfu Pyrite Mine was determined by the method of acid-dissolving, and the content of the rare-earth elements of the two dust samples was measured by ICP-MS. The influence factors of the possible sources and spatial distribution of the space distribution are discussed by Kriging's space difference and factor analysis. The results show that the acid wastewater and dust produced during the exploitation of pyrite are the main factors that affect the distribution of the rare earth elements in the surface of the mining area. The spatial distribution of the light rare earth element and the heavy rare earth element Gd is similar to that of the heavy rare earth element Gd, which is mainly affected by the dust in the mining area, and the heavy rare earth element (Gd) has a similar spatial distribution law, which may be influenced by the acid waste water from the tail mining area. The negative anomaly of Eu * and the positive anomaly of Ce * are mainly affected by the oxidation condition of the humid heat in South China, but the soil acidification caused by mining is also an important influence factor of the positive anomaly of Ce *; therefore, the rare earth element has an important indication for the change of soil environment in the periphery of the pyrite mining area, And can provide guidance for remediation of contaminated soil.
【作者单位】：中国科学院广州地球化学研究所边缘海地质重点实验室;中国科学院大学;
【基金】：国家自然科学基金委员会-广东联合基金项目(U1201131) 广东省-中国科学院战略合作项目(2012B090400045)
【分类号】：X753

【相似文献】