Measurement of Nitrogen Dioxide Concentration in Traffic Areas of Nakhon Si Thammarat Province and Health Risk Assessment

Janta, Rungruang; Kaewrat, Jenjira; Rattikansukha, Chuthamat; Sichum, Surasak

doi:10.14416/j.kmutnb.2020.06.006

Cited by 4 publications

(4 citation statements)

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“…The nitrogen concentration had a strong negative correlation (r s = −0.943) with humidity. The results of this study agree with those of the studies of Cros et al [44] and Janta et al [45], which also found a negative relation between NO 2 and ambient humidity. High vapor levels in the atmosphere under high solar radiation are related to the formation of hydroxyl radicals (•OH).…”

Section: Correlation Analysis Of Pollutant Distributionsupporting

confidence: 93%

Human Health Risks and Interference of Urban Landscape and Meteorological Parameters in the Distribution of Pollutant: A Case Study of Nakhon Si Thammarat Province, Thailand

Janta,

Kaewrat,

Tala

et al. 2023

Sustainability

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Recently, the air quality in urban areas has declined because of increasing traffic emissions. This paper aimed to determine the toxicity from exposure to pollutants among three sensitive groups of residents in urban areas. Moreover, this study also estimated the impacts of landscape and meteorological conditions on the accumulation of air pollutants in these areas. The results showed that the annual average concentration in the town exceeded the WHO air quality guidelines. Other areas that had a high traffic density also presented unacceptable levels according to the hazard quotient (HQ value ≥ 1). It was found that the air quality in the town had declined. This study also found that people living in a tropical monsoon climate should avoid exposure to air pollution in both the summer and rainy seasons; even though the pollutant concentration is lower in the rainy season, the longer exposure time causes unacceptable health risks. Humidity showed a strong impact on gas pollutant reduction (rs = −0.943). The pollutants tended to increase in areas with a high density of main roads. Additionally, building density affected the accumulation of pollutants in near-source areas and blocked pollutants in receptor areas. Therefore, this study suggests that local authorities should provide vegetation infrastructure for a sustainable air quality improvement in urban areas.

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Section: Correlation Analysis Of Pollutant Distributionsupporting

confidence: 93%

Human Health Risks and Interference of Urban Landscape and Meteorological Parameters in the Distribution of Pollutant: A Case Study of Nakhon Si Thammarat Province, Thailand

Janta,

Kaewrat,

Tala

et al. 2023

Sustainability

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“…This study found that the concentrations in the rainy season were approximately 0.8 times those of the summer season. The result was similar to our previous study [31], which showed the influence of meteorological conditions. In Nakhon Si Thammarat province, relative humidity (RH) and rainfall in the rainy season are higher than in the summer season.…”

Section: No 2 Concentrationsupporting

confidence: 92%

“…They usually react with nitrogen dioxide to form nitric acid (HNO 3 ) causing ambient NO 2 reduction. Additionally, the amount of higher rainfall in the rainy season can leach air pollution to the ground [31,32].…”

Section: No 2 Concentrationmentioning

confidence: 99%

Indoor Air Quality and Human Health Risk Assessment in the Open-Air Classroom

et al. 2021

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Indoor air quality is associated with academic performance and harmful health effects on students and teachers who participate in the classroom. Outdoor sources always contribute to classroom air quality. This study aims to estimate the amounts of indoor and outdoor pollutants and the influence of outdoor sources on open-air classrooms in a school located in the city. A health risk assessment was applied to assess the non-carcinogenic risk to students and teachers from exposure to the pollutants in the classroom. The concentrations of indoor NO2 ranged between 46.40 and 77.83 µg/m3, which is about 0.8 times that of outdoor NO2. A strong correlation and a high indoor/outdoor (I/O) ratio (>0.5) without a source, indicated that indoor NO2 is significantly influenced by outdoor sources. The range of indoor PM2.5 concentrations was 1.66 to 31.52 µg/m3 which was influenced by meteorological conditions. The indoor PM2.5 concentrations were affected by both indoor and outdoor sources. Although the level of indoor air pollutants met the official standard, the young children were exposed to indoor air pollutants which were above the recommended limits to human health with regard to the hazard index (HI) of 1.12. Instant measures such as regularly cleaning the classrooms, zoning the students, and installation of solid and vegetation barriers are recommended to reduce the daily dose of pollutants affecting students in open-air classrooms.

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“…Saenz-de-Miera and Rosselló [13] observed a 1 % tourist increase in Mallorca related to a 0.45 % increase in PM 10 concentration. Nitrogen dioxide concentration in Chiang Mai and Nakhon Si Thammarat's tourist cities were comparable in the range 13 to 96 µg m -3 , while the concentration in Seoul, Korea ranged 41 -181 µg m -3 [14][15][16]. Results indicated that NO 2 levels in tourist cities were influenced by factors such as tourism and other anthropogenic activities.…”

Section: Introductionmentioning

confidence: 89%

Health Risk Assessment of Residents in a Tourist City: A Case Study of Nakhon Si Thammarat Province

Kaewrat

Janta

2021

Walailak J Sci & Tech

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Nakhon Si Thammarat is one of the most popular tourist destinations among the secondary tourism cities according to economic promotions. The rapid growth of the tourism industry is evidenced by increasing road traffic, especially at weekends, contributing to high nitrogen dioxide (NO2) concentration. The concentration of NO2 was measured in the main tourist destinations of Nakhon Si Thammarat Province. Likewise, health risks from NO2 exposure were also evaluated for the local residents. Air mass movement was applied to indicate risk areas of non-cancer health effects from exposure to NO2. Air samples were collected over 24 hours using a passive sampling technique at 3 areas in the tourist destination on weekdays and weekends during the wet season in 2018 and 2019. Results showed that NO2 concentrations at weekends were 2 - 3 times higher than on weekdays due to increased vehicular traffic. Anthropogenic activities had a greater influence than meteorological conditions on pollutant concentration. The NO2 concentration was within the ambient air quality standard, but toxicological risk quotients for the residents were above the recommended limits for human health. Findings indicated that local residents risked non-cancer health effects from long-term exposure to NO2. Therefore, sensitive residents should avoid outdoor activities on weekends. Moreover, the tourism authority should consider controlling visitor numbers, providing a parking area, and providing public transportation systems to reduce traffic-related pollutants for sustainable tourism in Thailand.

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Measurement of Nitrogen Dioxide Concentration in Traffic Areas of Nakhon Si Thammarat Province and Health Risk Assessment

Cited by 4 publications

References 0 publications

Human Health Risks and Interference of Urban Landscape and Meteorological Parameters in the Distribution of Pollutant: A Case Study of Nakhon Si Thammarat Province, Thailand

Human Health Risks and Interference of Urban Landscape and Meteorological Parameters in the Distribution of Pollutant: A Case Study of Nakhon Si Thammarat Province, Thailand

Indoor Air Quality and Human Health Risk Assessment in the Open-Air Classroom

Health Risk Assessment of Residents in a Tourist City: A Case Study of Nakhon Si Thammarat Province

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