室内半挥发性有机物（SVOC）影响儿童的发育和成年人的生育，会引起过敏症甚至致癌。SVOC极易黏附在室内颗粒物上，其在空气和颗粒物间的分配对SVOC 散发、输运及健康暴露有重要影响。目前的研究均采用线性唯象的方式刻画SVOC气相/颗粒相分配，缺乏更深入的认识。为此，本项目将开展以下研究：（1）现场调查典型室内环境中代表性SVOC在空气和颗粒物间的分配系数；（2）基于调查结果，通过定量结构-物性关系方法研究SVOC的空气/颗粒物分配与颗粒物成分和SVOC分子结构间关系；（3）建立SVOC气相/颗粒相分配系数的粒径分布模型并进行实验验证；（4）通过实验和理论分析的方法探究室内环境温度和相对湿度对SVOC在空气和颗粒物间分配的影响。籍此初步阐明SVOC在空气和颗粒物间分配机制，给出气相/颗粒相分配系数预测公式。研究结果为理解室内SVOC散发、输运及健康暴露奠定基础，可用于指导室内SVOC污染。

Indoor Semi-Volatile Organic Compounds (SVOC) affect children's development and adults' reproduction and also induce allergy and even cancers. SVOCs are very easy to adhere to indoor particles. Therefore, SVOCs' partitioning between gas and particles plays an important role in their emission, transport and health exposure. In the current researches, partitioning of SVOCs is characterized in a linear phenomenological mode without a deeper insight. In this project, the following research will be conducted: (1) field investigation of the gas/particle partition coefficients of indoor representative SVOCs in the typical indoor environments will be made; (2) based on the field investigation results, the relationship between the gas/particle partitioning and particle's ingredients together with SVOC's molecular structure will be studied through the Quantitative Structure-Property Relationship (QSPR) method; (3) the model of SVOC gas/particle partition coefficients involving particle size distribution will be built up and be experimentally verified; (4) the influence of indoor environmental temperature and relative humidity on indoor SVOC partitioning between gas and particles will be explored by experiments and theoretical analysis. Based on that, the mechanism of SVOC partitioning between gas and particles will be clarified preliminarily and the partition coefficient can be predicted quantitatively. The research results will lay the foundation for understanding indoor SVOC emission, transport and health exposure and can be used for controlling indoor SVOC pollution.