NIDA in News

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Contributions of aerosol composition and sources to particulate optical properties in a southern coastal city of China

โดย Jie Tian, Qiyuan Wang, Yongming Han, Jianhuai Ye, Ping Wang, ศ.ดร.ศิวัช พงษ์เพียจันทร์* อาจารย์ประจำคณะพัฒนาสังคมและยุทธศาสตร์การบริหาร สถาบันบัณฑิตพัฒนบริหารศาสตร์, Haiyan Ni, Yaqing Zhou, Meng Wang, Youzhi Zhao, Junji Cao

Abstract

The contributions of chemical composition and emission sources to aerosol optical properties were evaluated for a coastal city in southern China. The average dry light scattering coefficient (b_{scat ,dry}) and light absorption coefficient (b_abs) were 32.5 ± 15.5 Mm-1 and 8.8 ± 4.7 Mm-1, respectively. Diurnal cycles in b_{scat ,dry} and b_abs were observed with peak values in the morning and at night. Both b_{scat ,dry} and b_abs varied with wind speeds and directions, and thus affected by transport pathways.

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Characteristics of PM_2.5 at a High-Altitude Remote Site in the Southeastern Margin of the Tibetan Plateau in Premonsoon Season

โดย Zhuzi Zhao, Qiyuan Wang, Li Li, Yongming Han, Zhaolian Ye, ศ.ดร.ศิวัช พงษ์เพียจันทร์* อาจารย์ประจำคณะพัฒนาสังคมและยุทธศาสตร์การบริหาร สถาบันบัณฑิตพัฒนบริหารศาสตร์, Yong Zhang, Suixin Liu, Ruixia Tian and Junji Cao

Abstract

The Tibetan Plateau (TP) is one of the world’s most sensitive areas for climate change. Previous studies have revealed that air pollutants emitted from South and Southeast Asia can be transported to and have a negative impact on the TP. However, the majority of the investigators have focused on the pollutant transport processes from South Asian regions (i.e., India and Bangladesh) and parts of Southeast Asia, while the regions adjacent to the southeast fringe of the TP (i.e., Burma and the Sino-Burmese border) have been neglected.

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Assessment of selected metals in the ambient air PM₁₀ in urban sites of Bangkok (Thailand)

โดย ศ.ดร.ศิวัช พงษ์เพียจันทร์* อาจารย์ประจำคณะพัฒนาสังคมและยุทธศาสตร์การบริหาร สถาบันบัณฑิตพัฒนบริหารศาสตร์, Akihiro Iijima

Abstract

Estimating the atmospheric concentrations of PM10-bounded selected metals in urban air is crucial for evaluating adverse health impacts. In the current study, a combination of measurements and multivariate statistical tools was used to investigate the influence of anthropogenic activities on variations in the contents of 18 metals (i.e., Al, Sc, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Cd, Sb, Ba, La, Ce and Pb) in ambient air. The concentrations ofPM10-bounded metals were measured simultaneously at eight air quality observatory sites during a half-year period at heavily trafficked roads and in urban residential zones in Bangkok, Thailand.

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Assessing human exposure to PM10-bound polycyclic aromatic hydrocarbons during fireworks displays

โดย ศ.ดร.ศิวัช พงษ์เพียจันทร์* อาจารย์ประจำคณะพัฒนาสังคมและยุทธศาสตร์การบริหาร สถาบันบัณฑิตพัฒนบริหารศาสตร์, Mattanawadee Hattayanone, Oramas Suttinun, Chukkapong Khumsup, Itthipon Kittikoon, Phoosak Hirunyatrakul, Junji Cao

Abstract

The “Loy Krathong” festival is a major annual Thai event that includes firework displays. It takes place on the evening of the full moon in the 12th month of the traditional Thai lunar calendar. Since fireworks are widely considered a major source of PAHs, it is considered reasonable to expect a significant increase in PAH levels during this event. The overall PAH profile at the six air quality observatories operated by the Pollution Control Department (PCD), Ministry of Natural Resources and Environment (MNRE), showed that the Kingdom of Thailand's atmosphere was dominated by 5e6-ring PAHs during the firework display period.

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Application of Binary Diagnostic Ratios of Polycyclic Aromatic Hydrocarbons for Identification of Tsunami 2004 Backwash Sediments in Khao Lak, Thailand

โดย ศ.ดร.ศิวัช พงษ์เพียจันทร์* อาจารย์ประจำคณะพัฒนาสังคมและยุทธศาสตร์การบริหาร สถาบันบัณฑิตพัฒนบริหารศาสตร์

Identification of Tsunami deposits has long been a controversial issue among geologists. Although there are many identification criteria based on the sedimentary characteristics of unequivocal Tsunami deposits, the concept still remains ambiguous. Apart from relying on some conventional geological, sedimentological, and geoscientific records, geologists need some alternative “proxies” to identify the existence of Tsunami backwash in core sediments.

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Ambient PM2.5, Polycyclic Aromatic Hydrocarbons and Biomass Burning Tracer in Mae Sot District, Western Thailand

โดย Radshadaporn Janta, Kazuhiko Sekiguchi, Ryosuke Yamaguchi, Khajornsak Sopajaree, ศ.ดร.ศิวัช พงษ์เพียจันทร์* อาจารย์ประจำคณะพัฒนาสังคมและยุทธศาสตร์การบริหาร สถาบันบัณฑิตพัฒนบริหารศาสตร์, Thaneeya Chetiyanukornkul

Abstract

Levoglucosan, as a biomass tracer, and sixteen polycyclic aromatic hydrocarbons (PAHs) in PM_2.5 ambient air samples collected from Tak Province during smoke and non-smoke episodes were analyzed. The average PM_2.5, levoglucosan and total PAHs concentrations in the smoke episode were 61.64 ± 22.85, 1.00 ± 0.41 μg/m³ and 6.32 ± 2.26 ng/m³, respectively. This figures were significantly higher than those recorded during the non-episode (13.76 ± 5.58, 0.12 ± 0.03 μg/m³ and 2.59 ± 0.15 ng/m³, respectively).

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A preliminary study of using polycyclic aromatic hydrocarbons as chemical tracers for traceability in soybean products

Abstract

Polycyclic Aromatic Hydrocarbons (PAHs) are a class of very stable organic molecules made up of only carbon and hydrogen and contain two to eight fused aromatic rings. PAHs are formed during incomplete combustion of organic materials such as fossil fuels, coke and wood. PAHs can be found in environment, the atmosphere, surface water, sediment, soil, food and in lipid tissues of both aquatic and terrestrial organisms.

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The Schooling Gap between the Deep South and the Rest of the South in Thailand

โดย Md. Nasir Uddin และ ผศ.ดร. ศรัณย์ ศานติศาสน์* (อาจารย์ประจำคณะพัฒนาการเศรษฐกิจ สถาบันบัณฑิตพัฒนบริหารศาสตร์)

ABSTRACT

This paper aims to compare the educational attainment of a conflict region (the Deep South) and a non-conflict region (the rest of the South) of Thailand using the Socio-Economic Survey, 2015. This paper employs the Instrumental Variable approach and Oaxaca-Blinder decomposition in an intergenerational regression model. When controlling parental schooling, household income and size, religion, and gender, the results show that children from the Deep

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Spatial distribution, sources and quantitative human health risk assessments of polycyclic aromatic hydrocarbons in urban and suburban soils of Chile

โดย Ronbanchob Apiratikul, ศ.ดร.ศิวัช พงษ์เพียจันทร์* อาจารย์ประจำคณะพัฒนาสังคมและยุทธศาสตร์การบริหาร สถาบันบัณฑิตพัฒนบริหารศาสตร์, Woranuch Deelaman

Abstract

This work investigated the concentrations and health risks of polycyclic aromatic hydrocarbons (PAHs) found in Chilean soils for the first time. The urban and suburban soils were collected from 28 sampling sites in three regions of Chile: Magallanes (in Punta Arenas commune), Valparaı´so and the Santiago metropolitan area. The PAH concentrations, fractions and their potential sources were studied.

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Does Marriage Discourage Female Labor Force Participation? Empirical Evidence from Thailand

โดย Tumsarp, P., ศ.ดร.พิริยะ ผลพิรุฬห์* อาจารย์ประจำคณะพัฒนาการเศรษฐกิจ สถาบันบัณฑิตพัฒนบริหารศาสตร์

Abstract

In labor supply theory, marriage can be one of the obstacles making it less likely for a woman to participate in the labor market. However, the relationship between marriage and a female’s working outside the home can vary according to a country’s stage of economic development. This paper therefore aims to investigate the impact of marital status on labor force participation of women in developing countries by using Thailand as a case study.

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