Environmental Evaluation of a Local Lake Chain Affected by Wastewater by Means of Spectrochemical Analytical Methods
✍ Scribed by Gy Heltai; I. Fekete; Z. Gémesi; K. Percsich; K. Flórián; Zs. Tarr
- Book ID
- 102614218
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 255 KB
- Volume
- 59
- Category
- Article
- ISSN
- 0026-265X
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✦ Synopsis
Analytical 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 Go ¨do ¨llo ˝was investigated. Today it is supplied by cleaned wastewater from Go ¨do ¨llo ˝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 HNO 3 extraction and inductively coupled plasma atomic emission spectrometry. The different radionuclides were detected by ␥ 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.