Environmental Evaluation of a Local Lake Chain Affected by Wastewater by Means of Spectrochemical Analytical Methods
1998; Elsevier BV; Volume: 59; Issue: 1 Linguagem: Inglês
10.1006/mchj.1998.1574
ISSN1095-9149
AutoresGy. Heltai, Ilona Fekete, Zoltán Gémesi, K. Percsich, K. Flórián, Zs. Tarr,
Tópico(s)Water Quality and Pollution Assessment
ResumoAnalytical strategy for clarification of an environmental pollution problem is presented in a case study. An artificial lake chain created by a rivulet running through the town of Gödöllő was investigated. Today it is supplied by cleaned wastewater from Gödöllő as well. The sediment was used as a cumulative indicator of pollution. It was shown that the application of limit values and standardized (or suggested) methods for analysis of wastewater sediment does not provide satisfactory information on the environmental status of the lakes and on the environmental hazards of pollution. For this purpose it was necessary to develop a suitable sampling strategy that would allow determination of the spatial distribution of different elements (nutrients and heavy metals) in the sediment layer. The estimation of total element concentration was made by dc-arc spectrography. The mobile element fraction was determined by means of 2 M HNO3extraction and inductively coupled plasma atomic emission spectrometry. The different radionuclides were detected by γ spectroscopy. The influence of the Chernobyl reactor accident was detected in the upper 30–35 cm sediment layer; at the waste inlets, the radioactivity was near the tolerable limit values. The above complex analytical evaluation together with soil hygienic investigations has made it possible to prove the origin and level of pollution in the lakes.
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