Adsorption and photodegradation of pyrene on magnetic, carbonaceous, and mineral subfractions of coal stack ash

Previous studies have shown that pollutants from incineration include heavy metal, PAH, PCB, PCDD and PCDF, which pose a threat to human health. It was also shown that most heavy metals were adsorbed on paniculate matter. However, the relations among heavy metals and organic compounds were seldom mentioned. The present study focuses on the relations among particle pollutants, PAH, heavy metals and carbon.The experiments were carried out in a bubbling fluidized bed with two consecutive cyclones, a wet scrubber and an activated carbon scrubber. The feedstocks primarily simulated sawdust, paint, and plastic containers that from the furniture manufacturing process. The results indicated that the influences of heavy metals on PAH formation during the incineration were due to metal catalysis and carbon adsorption.

show abstract

“…The fly ash collected by cyclones were refered as "solid phase PAH". (2). stainless sampling probe (3).…”

Section: Methodsmentioning

confidence: 99%

The influences of heavy metals on PAH formation during incineration

Wey

Chao

1996

Toxicological & Environmental Chemistry

View full text Add to dashboard Cite

show abstract

“…It has also been reported that carbonaceous materials such as soot, carbon black and fly ash can act as shields against PAHs photodegradation [10,11] while methoxyphenols, anthraquinones and benzophenone-like compounds on carbonaceous aerosol can act as atmospheric photosensitizers and greatly enhance the photodegradation of PAHs [12][13][14][15][16][17]. The atmospheric impact of methoxyphenol-enhanced photodegradation of PAHs associated with particles is potentially important because wood smoke as well as urban atmospheric aerosols are enriched in methoxyphenols and PAHs [18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Effect of phenolic compounds on photodegradation of anthracene and benzo[a]anthracene in media of different polarity

Schwab

Yang

et al. 2015

Journal of Photochemistry and Photobiology A: Chemistry

View full text Add to dashboard Cite

“…Carbonaceous particles can inhibit the photoreactivity of PAHs, while mineral particles can accelerate the photoreactivity of PAHs (Behymer and Hites, 1985;Dunstan et al, 1989;Korfmacher et al, 1980;Wang et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous photochemical reaction of ozone with anthracene adsorbed on mineral dust

Ma¹,

Ma²,

Liu³

et al. 2013

Atmospheric Environment

View full text Add to dashboard Cite

h i g h l i g h t s< Reactions of O 3 with anthracene on TiO 2 and Asian dust were photo-enhanced. < Anthraquinone can react with O 3 quickly in the presence of light. < Reactions of O 3 with anthracene adsorbed on Asian dust proceed by the LeH mechanism. a r t i c l e i n f o b s t r a c tThe heterogeneous reactions of O 3 with anthracene adsorbed on TiO 2 and on Asian dust storm particles were investigated in the dark and in the presence of light. The reaction rate constants of the heterogeneous reaction between O 3 and anthracene adsorbed on TiO 2 were increased by a factor of 1.5 in the presence of light compared to the dark conditions. Anthraquinone, which was identified as the main surface product of anthracene reacted with O 3 in the dark, can react with O 3 quickly in the presence of light. The reactions on Asian dust storm particles exhibited pseudo-first-order kinetics for anthracene loss, and the reactions between O 3 and anthracene adsorbed on Asian dust storm particles proceed by the LangmuireHinshelwood mechanism in the dark and in the presence of light. At extremely high ozone concentrations, the degradation of anthracene is enhanced by a factor of 3 in the presence of light compared to the dark conditions. Crown

show abstract

Adsorption and photodegradation of pyrene on magnetic, carbonaceous, and mineral subfractions of coal stack ash

Cited by 59 publications

References 23 publications

The influences of heavy metals on PAH formation during incineration

The influences of heavy metals on PAH formation during incineration

Effect of phenolic compounds on photodegradation of anthracene and benzo[a]anthracene in media of different polarity

Heterogeneous photochemical reaction of ozone with anthracene adsorbed on mineral dust

Contact Info

Product

Resources

About