Emission of Phthalates from Vinyl Flooring and Interaction with Fine Particles

0504167这个项目将开发一个模型来预测聚合物材料的半挥发性有机化合物的排放，重点是聚氯乙烯地板材料的增塑剂邻苯二甲酸二(2-乙基己基)酯的排放。聚氯乙烯地板中DHEP的质量浓度高达30%。具体的研究目标包括：(1)确定在有无细(气溶胶)颗粒存在的受控不锈钢气室中乙烯基地板的DEHP排放的特征；(2)确定乙烯基地板/空气、不锈钢/空气和细颗粒/空气之间的DEHP的平衡关系；(3)在气室试验之前、期间和之后测量乙烯基地板中的DEHP浓度；(4)将这些信息整合到排放模型中，并对其进行DEHP验证。该项目遵循之前的研究，开发了一个从聚合物材料中排放挥发性有机化合物的模型。长期目标是利用这项研究的结果来设计减少这些排放的方法。该项目将包括对博士生的培训和本科生参与研究。这项工作将通过为研究生环境分析化学课程开发实验室练习来整合到研究生教育中，从而将空气质量问题纳入以前只关注水问题的课程。

0504167 Little This project will develop a model to predict emissions of semi-volatile organic compounds from polymeric materials, focusing on emissions of the plasticizer di-(2-ethylhexyl) phthalate (DHEP) from PVC flooring materials. DHEP is present in concentrations as high as 30% by mass in PVC floorings. Specific research objectives include: (i) characterizing DEHP emissions from vinyl flooring in controlled stainless steel chambers with and without the presence of fine (aerosol) particles; (ii) determining equilibrium relationships for DEHP between vinyl flooring/air, stainless steel/air, and fine particles/air; (iii) measuring DEHP concentrations in vinyl flooring before, during, and after chamber tests; and (iv) integrating this information into an emissions model and validating it for DEHP. The project follows previous research to develop a model for emissions of volatile organic compounds from polymeric materials. The long-term goal is to use results of this study to design methods to reduce these emissions. The project will include the training of Ph.D. students and involvement of undergraduates in the research. The work will be integrated into graduate education by developing a laboratory exercise for a graduate environmental analytical chemistry course, thus bringing air quality issues into a course that previously focused only water issues.