scholarly journals South African Air Quality (1995-2015) - Ozone, nitrogen dioxide & sulfur dioxide trends based on passive sampler data

2020 ◽  
Author(s):  
Anonymous
Keyword(s):  
Air Quality ◽  
Sulfur Dioxide ◽  
Nitrogen Dioxide ◽  
South African ◽  
Passive Sampler

scholarly journals A Study of Indoor Air Quality in Refurbished Museum Building

2018 ◽  
Vol 4 (11) ◽  
pp. 2596 ◽  
Author(s):  
Syahrun Neizam Mohd Dzullkiflli ◽  
Abd Halid Abdullah ◽  
Lee Yee Yong ◽  
Abdul Mutalib Leman ◽  
Samiullah Sohu
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Sulfur Dioxide ◽  
Nitrogen Dioxide ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Fine Particles ◽  
Gaseous Pollutant ◽  
Healthy Environment ◽  
New Buildings

Problem related with indoor air quality (IAQ), is rapidly becoming a major health issue as people spend almost 90% of their time indoors. Museums were established in Malaysia more than hundred years ago. Since the year 2005, Malaysia has been moving away from constructing new buildings in favour of refurbishing historic and old ones. A healthy environment at the museum building has been identified as one of the important element that must been considered, but it is not sure either IAQ in the museum building provide a good air quality or not. The purpose of this study is to determine the actual indoor environment of the museum building in Melaka. In this study, the IAQ measurement were conduct for six days at the Melaka Sultanate Palace Museum and at the History and Ethnography Museum. During the measurement, IAQ parameters of gaseous pollutant of nitrogen dioxide, sulfur dioxide and carbon dioxide, and particulate matter of fine particles were recorded by using specific IAQ equipment. The finding of this study indicates that the distance of buildings from roadways appears to have an impact on indoor environmental levels, especially for nitrogen dioxide, sulfur dioxide and particulate matter. Based on the results, only gaseous pollutant of sulfur dioxide had not exceeding the acceptable TLV compared to the other IAQ pollutants.

scholarly journals What is the relationship between the coronavirus crisis and air pollution in Tunisia?

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Nihel Chekir ◽  
Yassine Ben Salem
Keyword(s):  
Air Quality ◽  
Sulfur Dioxide ◽  
Nitrogen Dioxide ◽  
Significant Drop ◽  
Industrial Activity ◽  
Substantial Impact ◽  
Social Distancing ◽  
Pollution Levels ◽  
Positive Side ◽  
Pollutant Concentrations

Abstract Since the beginning of 2020, the COVID-19 pandemic has generated horror and panic around the world. Nevertheless, this terrible crisis is having a positive side effect: it is lowering pollution levels. The outbreak of the coronavirus has caused many governments to impose measures to slow the spread of the virus within populations, such as limiting population displacement, requesting social distancing and the isolation of individuals at home, and reducing industrial activity. In this work, we investigated the effects of governmental measures taken to limit the spread of COVID-19 on the concentrations of air pollutants over four Tunisian cities (Tunis, Sousse, Sfax, and Tataouine). Data on the average daily levels of nitrogen dioxide, sulfur dioxide, carbon monoxide, and particulate matter during January, February, March, and April of 2020 were collected, treated, and analyzed for each city. Curves of average monthly pollutant concentrations from 1 January to 30 April for each city investigated showed that measures taken to reduce the spread of the virus had a substantial impact on emission levels: there were tremendous drops of 51% in NO2 and 52% in SO2 over Sfax City during March compared to those during January, while nitrogen dioxide and sulfur dioxide levels dropped by about 38% and 42%, respectively, over Tunis City and by around 20% for Sousse. During the four months investigated, almost all of the pollutant concentrations showed a significant drop from mid-March. On 12 March, the Tunisian government imposed some individual and collective measures to protect the population from the virus, such as social distancing, limiting transportation, shutting down schools and universities, and reducing industrial activity. A general lockdown was brought in later. Thus, restricting human and industrial activities appeared to affect the air quality in Tunisia, leading to a marked improvement in the air quality index. Graphic abstract

Ambiguous Air Pollution Effects of China’s COVID-19 Lock-down

2021 ◽  
Vol 111 ◽  
pp. 376-380
Author(s):  
Douglas Almond ◽  
Xinming Du ◽  
Valerie J. Karplus ◽  
Shuang Zhang
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Sulfur Dioxide ◽  
Nitrogen Dioxide ◽  
Quality Improvements ◽  
Pollution Effects ◽  
Ambient Pollution ◽  
Air Pollution Effects ◽  
Monitor Data ◽  
Silver Lining

Reductions in ambient pollution have been suggested as a "silver lining" to the COVID-19 pandemic. We analyze China's pollution monitor data and account for the large annual improvements in air quality following the Lunar New Year, which essentially coincided with lock-downs. With the exception of nitrogen dioxide, China's air quality improvements in 2020 are smaller than we should expect near the pandemic's epicenter, Hubei province. We see smaller improvements in sulfur dioxide than expected, while ozone concentrations roughly doubled in Hubei. Similar patterns are found for the six provinces neighboring Hubei. We conclude that COVID-19 had ambiguous impacts on China's air quality.

Sign in / Sign up

Export Citation Format

Share Document