Hong Chang

Bio: Hong Chang is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Particle. The author has an hindex of 1, co-authored 1 publications receiving 5 citations.

Microscopic morphology and elemental composition of atmospheric particles from seven micro-environments in Xi’an:

Abstract: This paper characterizes the morphological and elemental compositions of individual particles in seven micro-environments of Xi’an. Atmospheric particulate matter samples were collected at one subu...

A review of the effect of traffic-related air pollution around schools on student health and its mitigation

Abstract: Introduction The impact of traffic-related pollution around schools on student health has attracted increased attention in recent years. As students are exposed to pollutants around schools during their daily commute, the effect of pollutant exposure on students is substantial. Methods A literature review of the effects of traffic-related pollution around schools on student health and mitigation measures was conducted. A simple meta-analysis on the effects of PM2.5 and PM10 on respiratory health was also performed. Results Traffic-related pollutants have a great impact on student health. For example, NO2, elemental carbon, and particulate matter have a significant impact on the cognition and developmental nervous systems and respiratory system of students. When concentrations are high, the prevalence of respiratory infection, asthma, tracheitis, and other diseases in children increases. Traffic-related pollutants around schools affect the cardiovascular system and are associated with allergic symptoms. To reduce the effect of traffic-related pollution on student health, some mitigation measures are suggested. Suitable transport routes and walking routes to and from school should be planned based on the pollution levels around the school. Trees and hedges could be set up on the roads around the school to prevent the diffusion of PM. The influence of street form and building layout on pollutant diffusion should be considered in urban planning. In heavily polluted areas, pollutant filters can be used to clean the air. The government should actively reduce the number of vehicles near schools, strengthen infrastructure construction, and reduce congestion. At the social level, idle running time should be reduced. Conclusions We have a relatively strong understanding of the traffic pollution around schools and its impact on student health. The mitigation measures for reducing the effect of traffic pollution on student health were summarized. Future government policies and social initiatives that could be taken were proposed.

Chemical composition and source characterization of PM10 in urban areas of Lahore, Pakistan:

Abstract: This study aims to assess the physicochemical characteristics of the particulate matter ≤10 µm (PM10) at both congested and non-congested areas of Lahore, the second-largest city of Pakistan. PM10 ...

Microanalysis of Primary Biological Particles from Model Grass over Its Life Cycle

Abstract: Airborne biological aerosols are an integral part of the atmosphere–biosphere interface and significantly impact the environment and Earth’s climate. Primary biological particles such as fungal spo...

Particularities of indoor atmospheric corrosion of steel inside electric boxes in the tropical climate of Tabasco, Mexico

Abstract: Indoor corrosion inside electric boxes is important for the reliability of electric and electronic instruments. A parallel evaluation of indoor/outdoor atmospheric corrosion of steel, pollutants an...

Characterization of Ambient Fine Particles(PM_(2.5)) Concentration and Its Influential Factors in Xi'an

Abstract: Daily PM2.5(particle size smaller than 2.5 μm) samples were collected in Xi'an from September,2003 to July,2007,synchronously during that period,meteorological data(temperature,wind speed,rainfall and visibility) and air pollution index(API) were obtained.The average PM2.5 mass concentration in 4 years was 183.8±104.2 μg/m3 with an increasing trend.Weekly variation of PM2.5 concentrations showed two peaks corresponding to the busy traffic hours.Seasonal variations of PM2.5,which were circulative in annual scale,exhibited a same decreasing order as follows:winterautumnspringsummer.The temporal series of PM2.5,meteorological parameters,visibility,and air pollution index,API,indicated that wet deposition efficiently removed aerosols resulting in low PM2.5 level.The wind speed could lead to dilute PM levels when it was above 2.25 m/s.In contrast,lower wind speed most likely contributed to high PM levels.PM2.5 had a moderate positive relationship with API and a moderate negative relationship with visibility.