Evaporation of Metals during the Thermal Treatment of Oxide Nanomaterials in Cellulose-Based Matrices

Environmental Science & Technology
Mohamed Tarik, C Ludwig

Abstract

Like conventional material products, waste is the last stage of the life cycle of engineered nanomaterials, which are then incinerated or stabilized before disposal. However, because of their special physical characteristics, the fate of the thermally treated nanomaterials may differ or not from the conventional ones. In this study the thermal release of metals from three nanomaterials, namely CuO, ZnO, and TiO2, embedded in matrices containing organic and inorganic compounds was investigated by using an in-house developed setup. The latter, which combines a TGA (Thermogravimetric Analyzer) and an ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometer), offers the possibility to gain simultaneously thermogravimetric and elemental information. It is shown that the matrix composition, such as chlorine and silicon, plays a key role in the evaporation of Cu and Zn at temperatures above 700 °C, while at relatively low temperatures (250 to 450 °C) the nanomaterials are most probably entrained in the flue gas independently of their chemical properties. Incineration experiments using a tubular furnace and subsequent ICP-MS (ICP Mass Spectrometry) analysis of the obtained residues allowed for quantification of the metal evapo...Continue Reading

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Aug 20, 2019·Environmental Science & Technology·Jonas WielinskiRalf Kaegi

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Citations

Apr 17, 2021·Journal of Hazardous Materials·Jonas WielinskiRalf Kaegi

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