| Title: | Equilibrium distribution of diethyl phthalate plasticiser in cellulose acetate-based materials: Modelling and parameter estimation of temperature and composition effects |
| Author(s): | Da Ros S; Gili A; Curran K; |
| Address: | "UCL Institute for Sustainable Heritage, University College London, 14 Upper Woburn Place, London WC1H 0NN, United Kingdom. Electronic address: s.ros@ucl.ac.uk. UCL Institute for Sustainable Heritage, University College London, 14 Upper Woburn Place, London WC1H 0NN, United Kingdom. UCL Institute for Sustainable Heritage, University College London, 14 Upper Woburn Place, London WC1H 0NN, United Kingdom. Electronic address: k.curran@ucl.ac.uk" |
| DOI: | 10.1016/j.scitotenv.2022.157700 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Understanding the transport and fate of semi-volatile organic compounds (SVOCs) such as phthalates in indoor environments is fundamental for quantifying levels of human exposure and preventing adverse health effects. In this context, the partition coefficient of phthalates between indoor built materials and/or consumer goods and the surrounding atmosphere represents a key parameter for determining concentration distributions. Partition coefficients are also of fundamental importance for describing degradation phenomena associated with plasticiser loss from polymeric materials. However, this key parameter has only been determined for a limited number of systems and environmental conditions. Here, we assess the partitioning behaviour of the diethyl phthalate (DEP) plasticiser in cellulose acetate (CA)-based materials for the first time, determining the effects of temperature and plasticiser composition on equilibrium distributions at temperatures between 20 and 80 degrees C and using CA samples with DEP contents ranging from 6 to 22 wt%. Additionally, we propose a model to describe and quantify the effect of temperature and plasticiser composition, with model parameters being estimated using non-linear regression and measurements from 130 distinct experiments. Finally, we assess the suitability of our developed model to simulate the migration of DEP from CA-based materials" |
| Keywords: | "*Air Pollution, Indoor/analysis Cellulose/analogs & derivatives Humans *Phthalic Acids/analysis Plasticizers/analysis Temperature *Volatile Organic Compounds Cellulose acetate Dep Partition coefficients Phthalates Plasticiser loss;" |
| Notes: | "MedlineDa Ros, Simoni Gili, Argyro Curran, Katherine eng Netherlands 2022/08/05 Sci Total Environ. 2022 Dec 1; 850:157700. doi: 10.1016/j.scitotenv.2022.157700. Epub 2022 Aug 1" |
