Study On Typical Indoor BTEX Sorption Characteristics And Impact Factors Of Wall Paper

There are so many things which we can see or cannot see around our living, such as building and decorating materials, textiles, water, food, and human behaviors (cooking, smoking), emitting VOCs and bacteriums. These materials also have large surface, which may adsorb VOCs and then reemit them in a long period. This phenomenon make the concentration of the pollutant low and prolong the existence time.In this thesis, the review of indoor material sorption was summarized. New decorative rooms in hangzhou were analysed for TVOC concentration. It was found pollutant source characteristic was the most impact factor. As paint was common used to embellish the wood decoration, four paints source were choosed to monitor the concentration of BTEX. Toluene, ethylbenzene and p-xylene made up of the major components. Wall paper, common around our daylife, could act as sources or sinks of indoor air pollutants, interacting with air pollutants. A quick and simple experiment method was developed to account for these interactions in indoor air quality. From the dynamic experiment involving three kinds of wall paper between toluene and xylene, wall paper was identified as the most significant sorptive sink. Environment constants such as temperature, ventilation rate, chemical property also made different on the interactions. Temperature obviously restrained paper sorption process, and ventilation accelerated pollutant desorption from wall paper.Based on this kind of simple test chamber where material surface are exposed to VOCs and the concentration in the test chamber was monitored. Several constant was developed to describe the sorption sink interaction between material and chemical. Finally, the result of this study indicate a significant potential parameters for estimating fundamental sorption.