[Preliminary investigation on emission of PCDD/Fs and DL-PCBs through flue gas from coke plants in China].
Huan Jing Ke Xue
; 35(7): 2515-9, 2014 Jul.
Article
en Zh
| MEDLINE
| ID: mdl-25244832
ABSTRACT
According to the Stockholm Convention, polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (DL-PCBs) are classified into unintentionally produced persistent organic pollutants (UP-POPs), and named dioxins. Coke production as a thermal process contains organic matters, metal and chlorine, is considered to be a potential source of dioxins. Intensive studies on the emission of dioxins from coking industry are still very scarce. In order to estimate the emission properties of dioxins through coke production, isotope dilution HRGC/HRMS technique was used to determine the concentration of dioxins through flue gas during heating of coal. Three results were obtained. First, total toxic equivalents at each stationary emission source were in the range of 3.9-30.0 pg x m(-3) (at WHO-TEQ) for dioxins which was lower than other thermal processes such as municipal solid waste incineration. Second, higher chlorinated PCDD/Fs were the dominant congeners. Third, emissions of dioxins were dependent on coking pattern. Stamping coking and higher coking chamber may lead to lower emission.
Buscar en Google
Banco de datos:
MEDLINE
Asunto principal:
Polímeros
/
Benzofuranos
/
Bifenilos Policlorados
/
Coque
/
Contaminantes Atmosféricos
/
Dibenzodioxinas Policloradas
País/Región como asunto:
Asia
Idioma:
Zh
Revista:
Huan Jing Ke Xue
Año:
2014
Tipo del documento:
Article