Characterization of PCDD/Fs and dioxin-like PCBs in flue gas from thermal industrial processes in Vietnam: A comprehensive investigation on emission profiles and levels
| Autor: | My Hang Nguyen, Xuan Truong Nghiem, Binh Minh Tu, Hoang Quoc Anh, Mai Thi Ngoc Pham, Thi Nhung Dao |
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| Rok vydání: | 2018 |
| Předmět: |
Flue gas
Environmental Engineering Polychlorinated Dibenzodioxins Health Toxicology and Mutagenesis 0208 environmental biotechnology Industrial Waste 02 engineering and technology Incineration 010501 environmental sciences 01 natural sciences Industrial waste Environmental Chemistry 0105 earth and related environmental sciences Pollutant Air Pollutants Public Health Environmental and Occupational Health General Medicine General Chemistry Pollution Polychlorinated Biphenyls 020801 environmental engineering Vietnam Environmental chemistry Environmental science Gases Environmental Monitoring |
| Zdroj: | Chemosphere. 225 |
| ISSN: | 1879-1298 |
| Popis: | The emission profiles and levels of unintentionally produced persistent organic pollutants (U-POPs) comprising polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (dl-PCBs) were comprehensively investigated in flue gas released from 20 facilities belonging to 11 thermal industrial processes in Vietnam. Levels and patterns of PCDD/Fs and dl-PCBs in flue gas samples varied widely between sectors and different facilities in the same sector, suggesting different formation mechanisms involved. Flue gas concentrations of PCDD/Fs and dl-PCBs generally decreased in the order: industrial waste incinerator > secondary zinc production > coal fired craft boiler > coal fired power plant ≈ medical waste incinerator > steel production ≈ cement production > secondary copper production > coal fired industrial boiler > secondary tin production ≈ municipal waste incinerator. Results obtained from diagnostic ratio and fingerprint analysis have revealed that the stack emissions of PCDD/Fs and dl-PCBs were probably attributed to the de novo formation and incomplete destruction of input materials containing technical PCB oils or paints. The average emission factors of PCDD/Fs and dl-PCBs ranged from 0.011 to 374 μg WHO-TEQ tonne−1 for the studied facilities. A total emission amount of 4.89–11.4 g WHO-TEQ year−1 was estimated for the 20 facilities investigated in our study. This is the first comprehensive investigation on the unintentional emissions of PCDD/Fs and dl-PCBs from a wide range of industrial sectors in Vietnam. |
| Databáze: | OpenAIRE |
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