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Soil concentrations and soil-air exchange of polycyclic aromatic hydrocarbons in five Asian countries

Title
Soil concentrations and soil-air exchange of polycyclic aromatic hydrocarbons in five Asian countries
Author
문효방
Keywords
Polycyclic aromatic hydrocarbons; Soil; Fractionation; Soil-air exchange
Issue Date
2020-03
Publisher
Elsevier B.V.
Citation
SCIENCE OF THE TOTAL ENVIRONMENT, v. 711, Article no. 135223, 10pp
Abstract
The Asia Soil and Air Monitoring Program (Asia-SAMP) is a large-scale monitoring program spanning China, Japan, South Korea, Vietnam and India. 47 polycyclic aromatic hydrocarbons (PAHs) were analyzed in 169 concurrently collected surface soil samples across the five study regions. Total PAH concentrations (Sigma(47)PAHs) ranged from 13.1 to 7310 ng/g dry weight, with a median value of 272 ng/g dry weight. Higher concentrations of Sigma PAHs were recorded in soils from urban areas, followed by soils from rural areas and background soils. Low correlation coefficients were found between PAHs concentrations with population density, surface air temperature and soil organic content. A trend of depleting high molecular weight PAHs and enrichment of low molecular weight PAHs occurred from east to west in Chinese soils. Based on atmospheric PAHs detected in almost the same sampling sites, the equilibrium status of PAHs in the atmosphere and on the ground was investigated. Sample sites with a soil -air equilibrium status for different PAH congeners recorded differences, and differences were recorded between seasons. 2 -ring PAHs were mainly volatilized, and 5- 6-ring PAHs were mainly deposited in all seasons and across all study regions. 3- 4-ring PAHs were more affected by soil -air transfer, showing a tendency to accumulate in soils in cold regions/seasons and to be re-volatilized into the atmosphere in warm regions/seasons. Partitioning and exchange of PAHs among soil and air were significantly affected by the air temperature. (C) 2019 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0048969719352155https://repository.hanyang.ac.kr/handle/20.500.11754/163104
ISSN
0048-9697
DOI
10.1016/j.scitotenv.2019.135223
Appears in Collections:
COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > MARINE SCIENCE AND CONVERGENCE ENGINEERING(해양융합공학과) > Articles
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