Recently, the requirement to continuously collect bioaerosol samples using shorter response times has called for the use of real-time detection. The decreased cost of this technology makes it available for a wider application than military use, and makes it accessible to pharmaceutical and academic research. In this case study, real-time bioaerosol monitors (RBMs) were applied in elementary school classrooms—a densely occupied environment—along with upper-room ultraviolet germicidal irradiation (UVGI) devices. The classrooms were separated into a UVGI group and a non-UVGI control group. Fluorescent bioaerosol counts (FBCs) were monitored on 20 visiting days over a four-month period. The classroom with upper-room UVGI showed significantly lower concentrations of fine size (<3 μm) and total FBCs than the control classroom during 13 of the 20 visiting days. The results of the study indicate that the upper-room UVGI could be effective in reducing FBCs in the school environment, and RBMs may be applicable in reflecting the transient conditions of the classrooms due to the dynamic activity levels of the students and teachers.

Indoor radon exposure has been an increasing concern in recent years due to its health risks, like lung cancer and leukemia. Indoor radon exposure levels can be determined through measurement but with limitations. An increasing number of studies have started to apply simulation methods to assess indoor radon exposure levels in recent decades. To better understand currently available approaches for estimating indoor radon exposure, we conducted a systematic review of the current available methods for estimating the indoor radon levels. Through the search and screening of databases, a total of 28 related articles were included. The results show that the main methods for indoor radon estimation are mathematical models, statistical methods, and the geographic information system (GIS) method. The factors to consider include completion time, building type, floor area, number of floors, soil texture, building materials, and degree of urbanization. This paper, through its review of radon exposure level estimation and assessment methods, provides a more systematic understanding of this field, with important implications for accurately estimating the spatial and time distribution of indoor radon exposure and its health risks.

With the improvement of people's requirements for living environment, the effect of indoor radon radioactivity on health has been widely concerned. In this paper, taking a university in Shanghai as an example, indoor radon concentration and its related environmental parameters were measured in some of its rooms to understand the level of indoor radon concentration on its campus. The results showed that the average concentrations of student dormitory, office buildings, and academic buildings were 14.79±9.15 Bq/m3,22.67±5.72 Bq/m3, and 12.55±6.71 Bq/m3 respectively. Indoor radon was positively correlated with indoor temperature and humidity, and ventilation was also an effective method to reduce indoor radon.

With the improvement of people's requirements for living environment, the effect of indoor radon radioactivity on health has been widely concerned. In this paper, taking a university in Shanghai as an example, indoor radon concentration and its related environmental parameters were measured in some of its houses to understand the level of indoor radon concentration in its campus. The results show that the average concentrations of student dormitory, office building, and academic building are 14.79±9.15 Bq/m3,22.67±5.72 Bq/m3, and 12.55±6.71 Bq/m3 respectively. indoor radon is positively correlated with indoor temperature and humidity, and ventilation is also an effective method to reduce indoor radon.