Partitioning of Zn, Pb and Cd in river sediments from a lead and zinc mining area using the BCR three-step sequential extraction procedure.
Partitioning of Zn, Pb and Cd in river sediments from a lead and zinc mining area using the BCR three-step sequential extraction procedure.
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DOI：
10.1039/b106311c
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发表时间：
2001-11
期刊：
影响因子：
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通讯作者：
P. Svete;R. Milačič;B. Pihlar
中科院分区：
文献类型：
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作者：
P. Svete;R. Milačič;B. Pihlar
对（斯洛文尼亚）Mezica河谷铅锌矿区Meza河及其支流河道沿线沿着收集的沉积物的污染程度进行了调查。为了评估的重金属负荷，总浓度的Zn，Pb和Cd进行了测定和这些金属之间的容易和难溶的沉积物馏分的分区进行了使用稍微修改的BCR顺序提取程序。使用有证参比物质CRM 601检查分析数据的质量。测定的金属浓度与认证或指示性金属浓度之间具有良好的一致性。为了估计自然和人为输入的锌，铅和镉在沉积物中，铝归一化。分配研究的结果表明，锌占主导地位，在最难溶的馏分和分布之间的有机质和硫化物，而一个较小的比例被发现在易溶馏分。铅主要分布在有机质和硫化物之间，而镉主要与最难溶的部分。标准化程序的数据表明，人类活动的Zn，Pb和Cd的输入与沉积物中测定的非常高的总金属浓度相关。Zn、Pb、Cd总量最高（16.3. 9.3在海伦娜河沉积物中发现了以前采矿活动产生的汞（分别为0.13克/千克）。尽管沉积物中的易溶金属部分相对较低，但由于总金属浓度极高，这些部分中的金属浓度很高。这些数据表明陆地和水生环境受到严重污染。
The extent of pollution was investigated in sediments collected along the course of the river Meza and its tributaries in the lead and zinc mining area of the Mezica valley (Slovenia). In order to evaluate the heavy metal burden, total concentrations of Zn, Pb and Cd were determined and the partitioning of these metals between the easily and sparingly soluble sediment fractions was performed by the use of the slightly modified BCR sequential extraction procedure. The quality of analytical data was checked with Certified Reference Material CRM 601. Good agreement between the determined and certified or indicative metal concentrations was obtained. In order to estimate the natural and anthropogenic inputs of Zn, Pb and Cd in the sediments, normalisation to Al was applied. The results of the partitioning study indicate that Zn prevails in the most sparingly soluble fraction and is distributed between organic matter and sulfides, while a smaller proportion is found in the easily soluble fraction. Pb is distributed mainly between organic matter and sulfides, whereas Cd is predominantly associated with the most sparingly soluble fraction. Data from the normalisation procedure indicate that the anthropogenic inputs of Zn, Pb and Cd correlate with the very high total metal concentrations determined in sediments. The highest total Zn, Pb and Cd concentrations (16.3. 9.3 and 0.13 g kg(-1), respectively) were found in the sediment of the Helena rivulet, arising from former mining activities. In spite of the relatively low easily soluble metal fractions in the sediment, the concentrations of metals in these fractions are high, owing to the extremely high total metal concentrations. These data indicate severe pollution of the terrestrial and aquatic environment.