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Thermal disposal of waste containing nano-objects : first investigations on a methodology for risk management

Abstract : Considering the wide use and production of nano-objects since last two decades, these trendy nanomaterials (NMs) are expected to end up in thermal disposal and incineration waste plants. It seems relevant to assess the risks related to the thermal disposal and incineration of waste containing NMs (WCNMs). The objective of this work is to develop a methodology for risk management in order (1) to support decision-makers and incineration plant managers and (2) to give insights on nanosafety of exposed operators and on potential environmental risks related to the incineration and thermal disposal of WCNMs. Therefore, the main challenge is to find (a) key parameter(s) which would govern the decision related to risk management of NMs thermal disposal. On the one hand, we focused on the relevant literature studies about the incineration of NMs. On the other hand, we conducted a panel discussion. The review of this literature highlights that the nanostructure destruction of the nano-object appears as a relevant indicator of the risks related to the NMs incineration. As a consequence, we defined a “temperature of nanostructure destruction” (TND) which would be the temperature from which the nanostructure will be destroyed. For the later, this parameter has been assumed to be a consistent indicator to develop a preliminary methodology. If the combustion chamber temperature is higher than the TND of the NM or if they are close to each other, then the nanostructure will be destroyed and no risks related to NMs remain. If the TND of the NMs is higher than the combustion chamber temperature, then the nanostructure will not be destroyed and risks related to NMs have to be considered. As a result, five groups of nanomaterials have been defined. WCNMs including Carbon NMs appear to be in good position to be destroyed correctly. On the other hand, there would not be operational thermal disposal available to manage WCNMs including CeO2 and ZrO2. Finally, a decision tree has been designed. TND is used as criteria to assess if a waste can be managed safely or not by a specific thermal disposal and which safety measures have to be taken.
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Submitted on : Monday, August 6, 2018 - 3:57:53 PM
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  • HAL Id : ineris-01854347, version 1

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Ghania Ounoughene, Olivier Le Bihan, Carine Chivas-Joly, Claire Longuet, Bruno Debray, et al.. Thermal disposal of waste containing nano-objects : first investigations on a methodology for risk management. 5. International Conference Nanosafe "Health and safety issues related to nanomaterials for a socially responsible approach", Nov 2016, Grenoble, France. pp.245. ⟨ineris-01854347⟩

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