Full utilization of underground space and buildings could have positive economic and social effects. However, the microclimate and air quality must be well controlled so that they are not harmful to human health. This...Full utilization of underground space and buildings could have positive economic and social effects. However, the microclimate and air quality must be well controlled so that they are not harmful to human health. This survey indicated that relative humidity is a common hygienic problem in underground space and buildings. Attention should be paid to humidity control and to the strengthening of routine ventilation at the construction stage. Carbon dioxide can be used as a hygiene index of air pollution; the sanitary standard for it in the air of underground buildings is 10%. The hygienic survey shows that the concentration of carbon dioxide is usually below this standard in the environments of underground space and buildings. (c)1989 Academic Press,Inc.展开更多
With the increasing use of PPCPs （pharmaceuticals and personal care products）, the impact caused by the accumulation of PPCPs on the environment has become increasingly serious and has attracted considerable attenti...With the increasing use of PPCPs （pharmaceuticals and personal care products）, the impact caused by the accumulation of PPCPs on the environment has become increasingly serious and has attracted considerable attention. In the last 10 years, major studies on PPCPs have focused on the sources and analytical testing of concentrations in the environment. Afterward, studies have shifted to the transfer and transformation of PCPPs in the environment and to the environmental risk assessment of PPCPs. Studies on PPCPs in the underground environment have mainly focused on their adsorption, desorption, transfer, and transformation in the aeration and saturation zones. The main methods applied in these studies include indoor simulation experiments and outdoor sampling and testing. These studies have mainly considered one dimension, and most of them have concentrated only on the aeration or saturation zone. Therefore, the main developing directions of studies on PPCPs are the comprehensive study of the transfer and transform process from source to sink in the underground environment and the establishment of an effective and efficient PPCP detection system,展开更多
文摘Full utilization of underground space and buildings could have positive economic and social effects. However, the microclimate and air quality must be well controlled so that they are not harmful to human health. This survey indicated that relative humidity is a common hygienic problem in underground space and buildings. Attention should be paid to humidity control and to the strengthening of routine ventilation at the construction stage. Carbon dioxide can be used as a hygiene index of air pollution; the sanitary standard for it in the air of underground buildings is 10%. The hygienic survey shows that the concentration of carbon dioxide is usually below this standard in the environments of underground space and buildings. (c)1989 Academic Press,Inc.
文摘With the increasing use of PPCPs （pharmaceuticals and personal care products）, the impact caused by the accumulation of PPCPs on the environment has become increasingly serious and has attracted considerable attention. In the last 10 years, major studies on PPCPs have focused on the sources and analytical testing of concentrations in the environment. Afterward, studies have shifted to the transfer and transformation of PCPPs in the environment and to the environmental risk assessment of PPCPs. Studies on PPCPs in the underground environment have mainly focused on their adsorption, desorption, transfer, and transformation in the aeration and saturation zones. The main methods applied in these studies include indoor simulation experiments and outdoor sampling and testing. These studies have mainly considered one dimension, and most of them have concentrated only on the aeration or saturation zone. Therefore, the main developing directions of studies on PPCPs are the comprehensive study of the transfer and transform process from source to sink in the underground environment and the establishment of an effective and efficient PPCP detection system,
