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首页> 外文期刊>Journal of Environmental Protection and Ecology >ANALYTICAL INVESTIGATION CONCERNING THE METHODS FOR EXTRACTION OF EXCHANGEABLE FORMS OF HEAVY METALS FROM THE SEDIMENT FROM THE DANUBE DELTA
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ANALYTICAL INVESTIGATION CONCERNING THE METHODS FOR EXTRACTION OF EXCHANGEABLE FORMS OF HEAVY METALS FROM THE SEDIMENT FROM THE DANUBE DELTA

机译：关于从DANUBE三角洲沉积物中提取重金属可交换形态的方法的分析研究

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摘要

This paper proposes a chemical single extraction method for exchangeable forms of heavy metals applied to specific types of sediments from the Danube delta (Uzlina, Murighiol). The total contents of heavy metals (Cd, Cu, Cr, Mn, Pb and Zn) determined in the sediments from this location are within the normal levels of concentration according to the values indicated in the Romanian Order No 756/97. It was found a higher content of Fe, Mn and Cu in surface water just because of influence of exchangeable forms. The Standard NF X 31 - 120/1992 was found to be able to give a good information about exchangeable forms of heavy metals in the Danube delta sediment. In these sediments Cr is not in exchangeable forms, being bound poorly and strongly by crystalline iron oxides, organic matter, and in residual forms. Pb is bound in two different fractions: exchangeable fraction and bound by Mn oxides and organic matter. Different levels of concentration of exchangeable forms for Zn, Cu, Fe and Mn was determined in the analysed sediments.
机译：本文提出了一种适用于多瑙河三角洲（Uzlina，Murighiol）特定类型沉积物的重金属可交换形式的化学单一提取方法。根据罗马尼亚第756/97号命令中指示的值，从该位置的沉积物中确定的重金属（镉，铜，铬，锰，铅和锌）的总含量在正常浓度范围内。发现仅由于可交换形式的影响，地表水中的Fe，Mn和Cu含量较高。发现标准NF X 31-120/1992能够提供有关多瑙河三角洲沉积物中重金属可交换形式的良好信息。在这些沉积物中，Cr不能以可交换的形式存在，它们被结晶的氧化铁，有机物和残留形式的结合不良且牢固。 Pb以两种不同的部分结合：可交换部分和Mn氧化物和有机物结合。在分析的沉积物中确定了锌，铜，铁和锰的可交换形式的不同浓度水平。

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