Occupational exposure to nano-TiO2 in the life cycle steps of new depollutant mortars used in construction

4th International Conference on Safe Production and Use of Nanomaterials

Vaquero, C.^1 ; Gelarza, N.^1 ; De Ipiña, J L López^1 ; Gutierrez-Cañas, C.^2 ; Múgica, I.^2 ; Aragón, G.^2 ; Jaen, M.^3 ; Pina, R.^4 ; Larraza, I.^4 ; Esteban-Cubillo, A.^5 ; Thompson, D.^6 ; Pui, D.Y.H.^6

Tecnalia, Leonardo da Vinci 11, Miñano

01500, Spain^1

University of the Basque Country, Alameda de Urquijo s/n, Bilbao

48013, Spain^2

Tecnan, Los Arcos

31120, Spain^3

Acciona. Valportillo II, Alcobendas

280108, Spain^4

Tolsa Group, Carretera de Madrid a Rivas Jarama, 35, Madrid, Spain^5

University of Minnesota, 111 Church Street SE, Minneapolis

MN

55455, United States^6

关键词: Conventional materials;    Manufactured nanomaterials;    Manufacturing process;    Maximum concentrations;    Occupational exposure;    Particle concentrations;    Potential risks;    Powder material;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/617/1/012006/pdf
DOI  :  10.1088/1742-6596/617/1/012006

来源: IOP

【 摘 要 】

The present work is focused on the measurement of workers exposure to nano-TiO2in the life cycle steps of depollutant mortars. It has been done in the framework of the SCAFFOLD project, which aims at the management of potential risks arising from the use of manufactured nanomaterials in construction. Main findings can be summarized as follows: (1) The occupational exposure to nano-TiO2is below 0.3 mg/m3for all measured scenarios. The highest concentrations were measured during the cleaning task (in the nano-TiO2manufacturing process) and during the application (spraying) of depollutant coatings on a wall. It was found a high release of particles above the background in several tasks as expected due to the nature of the activities performed. The maximum concentration was measured during drilling and during adding powder materials (mean total particle concentration up to 5.591E+04 particles/cm3and 5.69E+04 particles/cm3). However, considering data on total particle concentration released, no striking differences have been observed when tasks have been performed using conventional materials in the sector (control) and when using materials doped with nano-objects.