Emissions, fate, exposure and management of chemical contaminants indoors and outdoors

室内外化学污染物的排放、归宿、暴露和管理

• 批准号: RGPIN-2017-06654
• 负责人: Diamond, Miriam
• 金额: $ 3.28万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=649233
• 关键词: Emissions; fate; exposure; management; chemical

This proposal is motivated by public concern about the negative impacts of toxic chemicals. The research goal is to provide information and tools to government agencies entrusted with protecting human and ecological health through chemical management policies and regulations, and to provide advice to the public on effective ways to minimize exposure to toxic chemicals. The knowledge needed to achieve this goal includes chemical sources, emissions, transport pathways and exposures. We propose to fill this need by connecting sources and emissions through to human and ecosystem exposures to toxic chemicals or “chemicals of concern”. Those chemicals include brominated and organophosphate flame retardants, phthalate plasticizers, synthetic musk fragrances, selected current use pesticides, and other semi-volatile organic compounds (SVOCs) prioritized by Canada's Chemical Management Plan. The SVOCs of interest here are released from products and materials. Their concentrations are highest indoors where Canadians spend 90% of their time and hence have opportunities for exposure. The SVOCs are then released from indoors to outdoors, where outdoor urban environments and ecosystems have high concentrations due to the confluence of people and activities. ******This proposal has four components. First, our research will identify and quantify indoor sources, emissions and processes controlling indoor SVOC concentrations. A focus will be on understanding the role of clothing in accumulating indoor SVOCs. Experiments will be conducted to measure SVOC uptake by fabrics from indoor air and release to laundry water. Results from these experiments will be used to improve our mechanistic model of indoor SVOC behaviour and to predict indoor emissions. Second, we propose to improve estimates of personal exposure to indoor SVOCs by further testing our novel silicone rubber passive sampler used to measure indoor SVOC air concentrations and exposure due to inhalation and contact with products (brooch and wristband designs). We will also conduct experiments with participants to test the role of clothing in SVOC exposure. Experimental information will be assembled into a predictive model of personal exposure. Third, we will follow SVOCs from indoors to outdoors in order to estimate the sources to, and extent of aquatic ecosystem exposure. Toronto will be used as a case study. This effort will entail measuring SVOCs in urban air and surface waters using passive samplers. The measurements in water will be used to estimate SVOC exposure to aquatic biota. Again, information from the sampling campaign will be assembled into a model to predict outdoor ecosystem exposure due to emissions from indoor products and materials, including clothes laundering as a conduit of SVOCs from indoors to outdoors. Finally, knowledge gained from the research will be used to promote chemical management in the context of sustainability.

这一提议是出于公众对有毒化学品负面影响的关注。研究目标是向负责通过化学品管理政策和法规保护人类和生态健康的政府机构提供信息和工具，并向公众提供关于尽量减少接触有毒化学品的有效方法的建议。实现这一目标所需的知识包括化学品来源、排放、运输途径和接触。我们建议通过将来源和排放与人类和生态系统接触有毒化学品或“令人关切的化学品”联系起来来满足这一需求。这些化学品包括溴化和有机磷酸盐阻燃剂、邻苯二甲酸酯增塑剂、合成麝香香料、目前使用的某些农药以及加拿大化学品管理计划优先考虑的其他半挥发性有机化合物。这里感兴趣的SVOC是从产品和材料中释放出来的。这些物质在室内的浓度最高，加拿大人90%的时间都在室内度过，因此有机会接触这些物质。SVOC随后从室内释放到室外，由于人和活动的汇合，室外城市环境和生态系统具有高浓度。* 本建议有四个组成部分。首先，我们的研究将确定和量化室内源，排放和控制室内SVOC浓度的过程。重点将是了解服装在积累室内SVOCs中的作用。将进行实验，以测量织物从室内空气中吸收的SVOC和释放到洗衣水中。这些实验的结果将用于改善我们的室内SVOC行为的机理模型，并预测室内排放。其次，我们建议通过进一步测试我们的新型硅橡胶被动采样器来改善对室内SVOC的个人暴露的估计，该采样器用于测量室内SVOC空气浓度以及由于吸入和接触产品（胸针和腕带设计）而导致的暴露。我们还将对参与者进行实验，以测试服装在SVOC暴露中的作用。实验信息将被组装成个人暴露的预测模型。第三，我们将从室内到室外跟踪SVOCs，以估计水生生态系统暴露的来源和程度。多伦多将被用作案例研究。这项工作将需要使用被动采样器测量城市空气和地表沃茨中的SVOCs。水中的测量值将用于估算水生生物群接触SVOC的情况。同样，来自采样活动的信息将被整合到一个模型中，以预测由于室内产品和材料的排放而导致的室外生态系统暴露，包括洗衣作为SVOCs从室内到室外的管道。最后，从研究中获得的知识将用于在可持续性的背景下促进化学品管理。