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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/8503

Title: Thermogravimetric desorption and de novo tests I: Method development and validation
Authors: TSYTSIK, Palina
Buekens, A
Issue Date: 2008
Citation: CHEMOSPHERE, 73(1). p. 113-119
Abstract: Thermogravimetric analysis (TGA) has been combined with evolved gas analysis (EGA) with the purpose of simulating the thermal behaviour of filter dust samples under inert (desorption) and de novo test oxidising conditions. Emphasis is on studying de novo formation of dioxins, surrogates and precursors arising from filter dust derived from thermal processes, such as municipal solid waste incineration and metallurgy. A new method is tested for sampling and analysing dioxin surrogates and precursors in the TGA effluent, which are collected on sampling tubes; the adsorbed compounds are eventually desorbed and quantified by TD-GC-MS. The major sources of error and losses are considered, including potential sorbent artefacts, possible breakthrough of volatiles through sampling tubes, or eventual losses of semi-volatiles due to their incomplete desorption or re-condensation inside the TG Analyser. The method is optimised and validated for di- to hexa-chlorinated benzenes in a range of 10-1000 ppb with average recovery exceeding 85%. The results are compared with data obtained in similar studies, performed by other research groups. As a result, the method provides the means for simulating de novo synthesis of dioxins in fly-ash and facilitates reliable and easy estimation of de novo activity, comparable with results of other studies, in combination with wide flexibility of testing conditions. (c) 2008 Elsevier Ltd. All rights reserved.
Notes: Hasselt Univ, Ctr Environm Sci Appl Chem, B-3590 Diepenbeek, Belgium. Vrije Univ Brussels, B-1050 Brussels, Belgium.
URI: http://hdl.handle.net/1942/8503
DOI: 10.1016/j.chemosphere.2008.04.085
ISI #: 000258904300018
ISSN: 0045-6535
Category: A1
Type: Journal Contribution
Validation: ecoom, 2009
Appears in Collections: Research publications

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