Atmospheric PCDD/F concentration and source apportionment in typical rural, Agent Orange hotspots, and industrial areas in Vietnam.
Chemosphere
; 182: 647-655, 2017 Sep.
Article
en En
| MEDLINE
| ID: mdl-28527418
ABSTRACT
Vietnam has a double burden of dioxin from both industrial sources and historical sources. To evaluate the concentration of PCDD/Fs in ambient air in different areas of Vietnam and their possible sources, atmospheric samples were collected from three areas namely Son La (rural area) and Da Nang (harbor - Agent Orange hotspot area), and Ho Chi Minh City (metropolitan - industrial city). Vapor and solid phases of PCDD/Fs were collected and analyzed following the TO-9A sampling method. Principal Component Analysis and Positive Matrix Factorization model were applied to characterize the possible source. The average concentrations of PCDD/Fs were found to be 21.3 ± 13 fg I-TEQ/m3 in Son La (n = 32), 65.2 ± 34 fg I-TEQ/m3 in Da Nang (n = 16) and 139 ± 84 fg I-TEQ/m3 in Ho Chi Minh City (n = 8). The findings of this study targeted open burning (42%) and biomass burning (51%) as the major emission sources of PCDD/Fs in ambient air of Son La, Vietnam. Major possible sources of PCDD/Fs in Da Nang could be transportation activities (64%), however, the other factor (36%) was suspected to be contaminated with 2,3,7,8-TeCDD from Agent Orange. Most of PCDD/Fs emitted in Ho Chi Minh City related to industrial activities (93%).
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Ácido 2,4,5-Triclorofenoxiacético
/
Benzofuranos
/
Contaminantes Atmosféricos
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Ácido 2,4-Diclorofenoxiacético
/
Dioxinas
/
Dibenzodioxinas Policloradas
Tipo de estudio:
Prognostic_studies
País/Región como asunto:
Asia
Idioma:
En
Revista:
Chemosphere
Año:
2017
Tipo del documento:
Article
País de afiliación:
Taiwán