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• W2462370307 abstract "3is described. In this work three WWTPs were selected: Strzelce Opolskie – plant I, Opole – plant II and Zabrze – plant III. Plant III is operated for mixed - municipal and industrial waste waters. The sampling procedure is based on passive sampling based on semi permeable membrane dialysis for preconcentration by selective absorption in triolein. The clean-up method was introduced in laboratory practice for the determination of PCDDs and PCDFs using GC-MS/MS system. The method is suitable for any other aqueous samples as for example for the determination of dioxins in mineral waters. It was indicated that this method is not suitable for preconcentration of dioxins in input stream in waste water treatment plants due to the high fat content. The SPMD method for sampling of waste waters was not used in practice so far. Methods and Materials Modern analytical methods are more and more expensive because of rising quality criteria of this analysis and the necessity of measuring the concentrations of pollutants at ultra-low levels. The determination of traces of contaminants in water and waste water needs sampling of high volume of the individual sample, causing problems with delivery and extraction. It is inconvenient and expensive. Nowadays rapid, effective and no expensive analytical methods for direct monitoring of pollutant concentrations in the environment are searched. One of this method is passive sampling technique based on semi permeable membrane devices (SPMD), invented by Huckins et al 1 . The SPMD method is used for the determination of pollutants in aquatic environment, especially to control the concentrations of organic compounds in surface waters. For the determination of trace concentrations of dioxins and furans in this work SPMD method was used. Experiment were carried out on four waste-water treatment plants. SPMD membranes were used to determinate dioxins, furans and PAHs in waste-water stream. Plants I and II were municipal, in plant III 5 % of waste-water comes from metallurgical, mining and brewing industry. The plant IV was industrial one. To compare results of experiments membranes were exposure in inlet stream (Fig. 1 and 2) after the sand trap and in outlet stream (fig. 3) simultaneously. In described experiment the membranes consist of thin-walled layflat tubing made from polyethylene were used (size 25x990 mm and 75-90 µm wall thickness). Membranes are filled with 1 g of triolein inside as an absorber. SPMDs were placed in samplers which are made of stainless steel - fig.4. The samplers were cleaned-up by hexane just before exposure. Membranes were exposure over 14 days period in each case. The temperature of waste-water was 14-16 0 C." @default.
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• W2462370307 date "2003-01-01" @default.
• W2462370307 modified "2023-10-03" @default.
• W2462370307 title "MONITORING OF PCDDS, PCDFS AND PAHS IN WASTE-WATER WITH USE OF SEMIPERMEABLE MEMBRANE DEVICES (SPMD)" @default.
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