A variety of strategies have been implemented to protect nonsmokers from second hand smoke; these include separation or restricting smoking to selected areas, installation of air cleaners, increased ventilation, and outright prohibition of smoking. The concentrations of nicotine were measured and examined in different venues as a function of the techniques employed.
In the light of difficulties associated with giving up smoking, which is the most effective strategy for household members to adopt to reduce children’s exposure to environmental tobacco smoke (ETS) in the home, an evaluation has been undertaken of other
Using the model developed in part 1 of this paper, the influence of material kinds, ventilation and air-cleaning device on VOC concentration in room is studied. The conclusion is that ventilation rate plays a very important role on VOCs concentration, but it affects little on VOCs emission rate.
The performance of two gaseous air cleaners in a single test room was measured for toluene. The effectiveness is between 82 and 94%. Numerical simulations were performed with CONTAMW software to predict indoor air quality. The comparison with experimental results is good.
The influence of the electrostatic forces on airborne particles have been known for centuries. These early discoveries have been summarized in several publications including the classical book "Electrostatic Precipitation" by White (1) and many others (e.g. 2, 3, 4). The utilization of the electrostatic force led to the development of electrostatic precipitator (ESP) which has been used for pollution control purposes since the beginning of this century. An excellent historical review about the development of electrostatic gas cleaning has been presented by White (1).
The provision of a healthy and satisfactorily clean indoor environment requires that consideration be given to a range of issues, such as the type of indoor environment, indoor and outdoor sources, indoor activity and others. The selection of relevant measures to achieve the required indoor air quality (IAQ) depends on knowledge and understanding of the mechanisms and parameters affecting the concentration levels indoors.
Indoor air quality is decreasing year by year. It is very necessary to find a kind of efficient cleaner to improve the indoor air quality. Two kinds of cleaners were tested. Both of them were made in China. Four simulated chambers were used. The research was performed with monitoring and toxicological tests. The results showed the cleaner A absorbed and filtered smoke very fast. But CO and CH2O could not have been absorbed and filtered. Cleaner B either could absorb smoke or could exchange air with outdoor air. The cleaning efficiency of cleaner B is better than that of cleaner B.