The paper presents results of the research on the dynamics of changes in the concentration of mercury in surface waters. The importance of mercury as an environmental pollutant results from specific properties of this metal, many sources of contamination, volatility, mobility, stability and high toxicity of its specific chemical forms. Samples of surface water collected from three rivers: the Bug, the Liwiec and the Muchawka were analysed. The Muchawka River flows into the Liwiec River, which in turn is a tributary of the Bug River. The technique of isotachophoresis was employed, using a solution of a biodegradable and environmentally non-toxic derivative of electrostatically stabilised silanates as the terminating electrolyte. The highest average mercury concentration of 0.89 μg/dm³ was determined in water samples collected from the Bug River in January, whereas the lowest concentration of 0.42 μg/dm³ was recorded in water collected from the Muchawka River in September.

本文介绍了地表水中汞浓度变化动态的研究结果。汞作为环境污染物的重要性源于这种金属的特殊性质，多种污染源，其特定化学形式的挥发性，迁移率，稳定性和高毒性。分析了从三个河流（Bug，Liwiec和Muchawka）收集的地表水样品。Muchawka河流入Liwiec河，后者又是Bug河的支流。使用等速电泳技术，使用静电稳定的硅烷酸酯的可生物降解且对环境无毒的衍生物的溶液作为终止电解质。最高平均汞浓度为0.89μg/ dm ³一月从布格河收集的水样中的汞含量被确定，而九月从穆克霍卡河收集的水中记录的最低浓度为0.42μg/ dm ³。