scholarly journals Characterization and Risk Assessment of Particulate Matter and Volatile Organic Compounds in Metro Carriage in Shanghai, China

Atmosphere ◽  
2019 ◽  
Vol 10 (6) ◽  
pp. 302 ◽  
Author(s):  
Yu Gong ◽  
Tao Zhou ◽  
Youcai Zhao ◽  
Bin Xu
Keyword(s):  
Particulate Matter ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Ventilation System ◽  
Air Filtration ◽  
Filtration System ◽  
Volatile Organic ◽  
Exposure Levels ◽  
Shanghai Metro ◽  
Metro System

Air quality in transportation microenvironment has received widespread attention. In this study, the exposure levels of volatile organic compounds (VOCs) and particulate matter that have a diameter of less than 2.5 micrometers (PM2.5) in Shanghai metro system were measured simultaneously, and their risks to human health under different driving conditions were then assessed. The results showed that VOCs, PM2.5 concentrations and life cancer risk (LCR) of four VOCs (benzene, formaldehyde, ethylbenzene, and acetaldehyde) in the old metro carriages were about 3 times, 3 times and 2 times higher than those in the new metro carriages, respectively. This difference can be ascribed to the fact that air filtration system in the new metro trains is significantly improved. The VOC levels, PM2.5 concentrations and LCR of VOCs on the above-ground track were slightly higher than those on the underground track. This is due to less outdoor polluted air entering into the carriage on the underground track. Number of passengers also had an effect on VOCs and PM2.5 concentrations in metro carriages. Additionally, the LCR of VOCs inside metro trains should not be ignored (7.69 × 10−6~1.47 × 10−5), especially inside old metro trains with the old ventilation system.

scholarly journals Nature Based Solution for indoor air quality treatment

2021 ◽  
Vol 2042 (1) ◽  
pp. 012133
Author(s):  
Heinz Gattringer ◽  
Nektaria Efthymiou-Charalampopoulou ◽  
Egmont Lines ◽  
Maria Kolokotroni
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Organic Compounds ◽  
Indoor Air ◽  
Air Filtration ◽  
Lower Efficiency ◽  
Filtration System ◽  
Volatile Organic ◽  
Indoor Conditions

Abstract Plants have the ability to absorb and degrade VOCs (volatile organic compounds). Foliage can intercept particulate matter (PM) and thus, help to reduce its concentration in the air. Plants can be used as filters in indoor conditions adding an ecosystem service to the decorative purpose. A plant-based air filtration system that actively improves indoor air quality has been developed and installed at a students’ residence at Brunel University, London. This unit replaces an existing window with a mini-greenhouse containing upwards of 30 plants and is connected to an air circuit to treat the indoor air. A monitoring plan is collecting data on the performance of the solution until at least the end of 2021. Preliminary results are presented, which indicate good effectiveness at reducing tVOCs and lower efficiency at reducing PM.

scholarly journals Influence of kitchen structures on household exposure to firewood-induced volatile organic compounds in Senwabarwana villages

2020 ◽  
Vol 13 (10) ◽  
pp. 1193-1201
Author(s):  
Khomotso Semenya ◽  
Fannie Machete
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Structural Factors ◽  
Volatile Organic ◽  
Environmental Health Risk ◽  
Roofing Material ◽  
Benzene Toluene ◽  
Exposure Levels ◽  
Cooking Water ◽  
Key Drivers

Abstract This paper presents the extent to which kitchen structures influence household exposure to firewood-induced volatile organic compounds (VOCs). The sample consisted of 69 firewood users who were conveniently sampled from Senwabarwana Villages. An Integrated Environmental Health Risk Assessment framework (IEHRA) was adopted as the research methods of the current study. The VOC samples were collected from selected priority firewood species used in the study area, namely mushu (Umbrella thorn), mohwelere (red bushwillow), moretshe (Sickle bush), motswiri (Leadwood) and mokgwa (Black monkey thorn). Four VOCs, namely benzene, toluene, ethylbenzene and xylene were analysed from each of the selected plant species. Available literature shows that these VOCs are associated with the kind of common firewood used in the study area. The outcomes of this study reveal that mushu emits the highest concentration of the four selected VOCs, followed by moretshe, mohwelere, mokgwa and motswiri, respectively. The influence of kitchen structural factors such as number and positioning of windows, fireplace or stove type, roofing material and designs, among others on the concentration and indoor dispersion of VOCs was also investigated. Behavioural practices of households during fire making such as opening or closing of doors and windows during cooking, water heating and space heating were also found to influence exposure levels. Consequently, low VOCs emitting firewood species and kitchen structural designs have been confirmed as the key drivers of firewood-induced VOC exposure.

Electrospun Polyacrylonitrile/β-Cyclodextrin Composite Membranes for Simultaneous Air Filtration and Adsorption of Volatile Organic Compounds

2018 ◽  
Vol 1 (8) ◽  
pp. 4268-4277 ◽  
Author(s):  
Vinod Kadam ◽  
Yen Bach Truong ◽  
Christopher Easton ◽  
Shayanti Mukherjee ◽  
Lijing Wang ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Composite Membranes ◽  
Air Filtration ◽  
Volatile Organic

scholarly journals A Prototype Sensor for In Situ Sensing of Fine Particulate Matter and Volatile Organic Compounds

Sensors ◽  
2018 ◽  
Vol 18 (1) ◽  
pp. 265 ◽  
Author(s):  
Chee-Loon Ng ◽  
Fuu-Ming Kai ◽  
Ming-Hui Tee ◽  
Nicholas Tan ◽  
Harold Hemond
Keyword(s):  
Particulate Matter ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Fine Particulate Matter ◽  
Fine Particulate ◽  
Volatile Organic ◽  
In Situ Sensing

Emissions of Volatile and Semi-Volatile Organic Compounds and Particulate Matter from Hot Asphalts

1997 ◽  
Vol 18 (2) ◽  
pp. 121-138 ◽  
Author(s):  
A. M. Kitto ◽  
M. Pirbazari ◽  
B. N. Badriyha ◽  
V. Ravindran ◽  
R. Tyner ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Volatile Organic
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