Browsing by Keyword "info:eu-repo/grantAgreement/EC/FP7/280535/EU/Innovative strategies, methods and tools for occupational risks management of manufactured nanomaterials (MNMs) in the construction industry/SCAFFOLD"
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Item Analysis of multivariate stochastic signals sampled by on-line particle analyzers: Application to the quantitative assessment of occupational exposure to NOAA in multisource industrial scenarios (MSIS): Application to the quantitative assessment of occupational exposure to NOAA in multisource industrial scenarios (MSIS)(2015-05-26) López de Ipiña, J.M.; Vaquero-Moralejo, Celina; Gutierrez-Cañas, C.; Pui, D.Y.H.; Tecnalia Research & Innovation; SMART_MON; PRINTEXIn multisource industrial scenarios (MSIS) coexist NOAA generating activities with other productive sources of airborne particles, such as parallel processes of manufacturing or electrical and diesel machinery. A distinctive characteristic of MSIS is the spatially complex distribution of aerosol sources, as well as their potential differences in dynamics, due to the feasibility of multi-task configuration at a given time. Thus, the background signal is expected to challenge the aerosol analyzers at a probably wide range of concentrations and size distributions, depending of the multisource configuration at a given time. Monitoring and prediction by using statistical analysis of time series captured by on-line particle analyzersin industrial scenarios, have been proven to be feasible in predicting PNC evolution provided a given quality of net signals (difference between signal at source and background). However the analysis and modelling of non-consistent time series, influenced by low levels of SNR (Signal-Noise Ratio) could build a misleading basis for decision making. In this context, this work explores the use of stochastic models based on ARIMA methodology to monitor and predict exposure values (PNC). The study was carried out in a MSIS where an case study focused on the manufacture of perforated tablets of nano-TiO2 by cold pressing was performed.Item Exposure Assessment During the Industrial Formulation and Application of Photocatalytic Mortars Based on Safer n-TiO2 Additives(2020-03) Vaquero, Celina; Esteban-Cubillo, Antonio; Santaren, Julio; López de Ipiña, Jesús; Galarza, Nekane; Aragón, Gaizka; Múgica, Iñaki; Larraza, Iñigo; Pina-Zapardiel, Raúl; Gutierrez-Cañas, Cristina; PRINTEX; SMART_MONTitanium dioxide nanoparticles (n-TiO2) are added to photocatalytic mortars to improve urban air quality. Their activity can be increased by dispersing and binding them on natural sepiolite surface. Workers handling photocatalytic additives can be exposed to n-TiO2. However, the release of nanoparticles to the workplace can be different if the material used is raw n-TiO2 powders or if the nanoparticles are supported on sepiolite. In this work, we compare occupational exposure to n-TiO2 for raw n-TiO2 and a hybrid additive n-TiO2/sepiolite obtained by a proprietary process. Measurements were performed in two industrial sites that process 1 ton batches of mortars, formulated with the same quantity of n-TiO2, followed by their application outdoors. Direct reading instruments were used to monitor particle number concentration and size distribution. Simultaneously, filter-based samples were collected for mass concentration and microscopy analysis. Two tasks produced a significant release of particles, the addition of fillers during the mortar formulation, in site 1, and the mixing of mortar with water for its application in the second site. For the first task, particle concentration was significantly lower when the n-TiO2/sepiolite was added compared to the raw n-TiO2. For the second task, once the mortar is fully formulated, this metric does not identify differences among the batches. Titanium mass concentration was 3–10 times lower when handling the mortar formulated with the hybrid additive. These results suggest that supporting the n-TiO2 on the sepiolite network not only increases the photocatalytic activity, but is also a safer design that reduces exposure to nanoparticles.Item Modeling of occupational exposure to accidentally released manufactured nanomaterials in a production facility and calculation of internal doses by inhalation(2016-07-02) Pilou, Marika; Vaquero-Moralejo, Celina; Jaén, María; López de Ipiña, J.M.; Neofytou, Panagiotis; Housiadas, Christos; Lopez De Ipiña Peña, Jesús; Tecnalia Research & Innovation; PRINTEX; SMART_MONBackground: Occupational exposure to manufactured nanomaterials (MNMs) and its potential health impacts are of scientific and practical interest, as previous epidemiological studies associate exposure to nanoparticles with health effects, including increased morbidity of the respiratory and the circulatory system. Objectives: To estimate the occupational exposure and effective internal doses in a real production facility of TiO2 MNMs during hypothetical scenarios of accidental release. Methods: Commercial software for geometry and mesh generation, as well as fluid flow and particle dispersion calculation, were used to estimate occupational exposure to MNMs. The results were introduced to in-house software to calculate internal doses in the human respiratory tract by inhalation. Results: Depending on the accidental scenario, different areas of the production facility were affected by the released MNMs, with a higher dose exposure among individuals closer to the particles source. Conclusions: Granted that the study of the accidental release of particles can only be performed by chance, this numerical approach provides valuable information regarding occupational exposure and contributes to better protection of personnel. The methodology can be used to identify occupational settings where the exposure to MNMs would be high during accidents, providing insight to health and safety officials.Item Strategies, methods and tools for managing nanorisks in construction(2015-05-26) López de Ipiña, J.M.; Vaquero-Moralejo, Celina; Boutry, D.; Damlencourt, J.F.; Neofytou, P.; Pilou, M.; Jankowska, E.; Larraza, I.; Pina, R.; Fernández, S.; Contreras, S.; Romero, A.; Calderon, M.; Swiezewsk, P.; Otkallo, K.; Pintea, A.; Salazar, C.; Oroz, T.; Hargreaves, B.; Ciobanu, R.; Tabrea, A.; Hazebrouck, B.; Salvi, O.; Stockmann-Juvala, H.; Vaananen, V.; Pui, D. H. Y.; Thompson, Drew; Tecnalia Research & Innovation; SMART_MON; PRINTEXThis paper presents a general overview of the work carried out by European project SCAFFOLD (GA 280535) during its 30 months of life, with special emphasis on risk management component. The research conducted by SCAFFOLD is focused on the European construction sector and considers 5 types of nanomaterials (TiO2, SiO2, carbon nanofibres, cellulose nanofibers and nanoclays), 6 construction applications (Depollutant mortars, selfcompacting concretes, coatings, self-cleaning coatings, fire resistant panels and insulation materials) and 26 exposure scenarios, including lab, pilot and industrial scales. The document focuses on the structure, content and operation modes of the Risk Management Toolkit developed by the project to facilitate the implementation of "nano-management" in construction companies. The tool deploys and integrated approach OHSAS 18001 - ISO 31000 and is currently being validated on 5 industrial case studies.Item Towards an optimal adaptation of exposure to NOAA assessment methodology in Multi-Source Industrial Scenarios (MSIS): the challenges and the decision-making process: The challenges and the decision-making process(2017-06-01) López de Ipiña, J.M.; Vaquero-Moralejo, Celina; Gutierrez-Cañas, C.; Tecnalia Research & Innovation; SMART_MON; PRINTEXIt is expected a progressive increase of the industrial processes that manufacture of intermediate (iNEPs) and end products incorporating ENMs (eNEPs) to bring about improved properties. Therefore, the assessment of occupational exposure to airborne NOAA will migrate, from the simple and well-controlled exposure scenarios in research laboratories and ENMs production plants using innovative production technologies, to much more complex exposure scenarios located around processes of manufacture of eNEPs that, in many cases, will be modified conventional production processes. Here will be discussed some of the typical challenging situations in the process of risk assessment of inhalation exposure to NOAA in Multi-Source Industrial Scenarios (MSIS), from the basis of the lessons learned when confronted to those scenarios in the frame of some European and Spanish research projects.