Degradation of PCDD/Fs by mechanochemical treatment of fly ash from medical waste incineration

Yan, Jun; Peng, Zheng; Lu, Shengyong; Li, X.D.; Ni, Mingjiang; Cen, Kefa; Dai, Hui-fen

doi:10.1016/j.jhazmat.2007.02.073

Cited by 86 publications

(34 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…in the discharged ashes of the combustion chamber, scrubber, BF1, BF2, BF1 + BF2 in MWI-A, and the singlebag filter system, scrubber, and BF in MWI-B, are listed in Table 4. The PCDD/F content in the fly ash, which was (Yan et al, 2007;Bie et al, 2007;Chen et al, 2008;Zheng et al, 2010;Wu et al, 2011). These results provide evidence that AC is an ideal adsorbent for the removal of PCDD/Fs in MWIs.…”

Section: Pcdd/f Contents In the Discharged Ashes Of The Different Apcdsmentioning

confidence: 64%

The PCDD/F Removal Efficiency of a Medical Waste Incinerator Dual-Bag Filter System

Chen

Lin

Wang

et al. 2014

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

This study investigated the polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) removal efficiencies in two medical waste incinerators (MWIs) -MWI-A and MWI-B, with waste burning capacities of 9.12 and 12 tons per day, with dual-and single-bag filter systems, respectively. The PCDD/Fs in the stack flue gas and fly ashes of each air pollution control device (APCD) unit were collected concurrently. Based on mass balance, it was determined that the major PCDD/F removal occurred in the bag filter system with activated carbon injection (ACI). The total PCDD/F emission removal efficiencies for the whole dual-bag filter system, bag filter 1 (BF1), bag filter 2 (BF2) in MWI-A and the single bag filter system (BF) in MWI-B were 99.7%, 84.8%, 98.0%, 99.0% on the mass basis, respectively. The PCDD/F emission ratio (the escaped PCDD/F ratio after all APCDs) with the dual-bag filter system was over four times lower than that with a single bag filter. The results demonstrate a very efficient way to reduce the excess PCDD/F emissions incurred by intermittent operations and irregular waste feeding.

show abstract

Section: Pcdd/f Contents In the Discharged Ashes Of The Different Apcdsmentioning

confidence: 64%

The PCDD/F Removal Efficiency of a Medical Waste Incinerator Dual-Bag Filter System

Chen

Lin

Wang

et al. 2014

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

show abstract

“…They reported the degradation behaviour of dioxins in FA caused by mechanochemical treatment. The concentration of dioxins in FA decreased from 9 ng-TEQ/g to 30 pg-TEQ/g after mechanochemical treatment for 4 h, and no dioxins was detected after 8 h. Yan et al (2007) also investigated the potential of mechanochemical treatment to degrade PCDD/Fs contained in FA via grounding with calcium oxide (CaO) under atmospheric pressure. The results indicated that PCDD/Fs included in real FA could be degraded by mechanochemical treatment.…”

Section: S/s Mechanochemistrymentioning

confidence: 99%

Fly Ash Pollutants, Treatment and Recycling

Gianoncelli

Zacco

Struis

et al. 2013

Environmental Chemistry for a Sustainable World

View full text Add to dashboard Cite

“…The extraction and clean-up procedures of fly ash samples, as well as the analytical determination of PCDD/Fs were carried out according to the standard method (Yan et al 2007). A selective pressured liquid extraction (SPLE) method was used for sample extraction by using a fully automated ASE 300 system (Dionex, Sunnyvale, CA, USA).…”

Section: Pcdd/fs Analysismentioning

confidence: 99%

“…In another study on solid waste incinerator fly ash from Taiwan, the content of PCDD/Fs was 6.5-327.0 ng kg −1 (Chen et al 2006). Shi et al (2008) and Yan et al (2007) investigated the PCDD/Fs content of fly ash from solid waste incinerators in China, which ranged from 2.5 to 183.0 ng kg −1 .…”

mentioning

confidence: 99%

Heavy metals and PCDD/Fs in solid waste incinerator fly ash in Zhejiang province, China: chemical and bio-analytical characterization

Yao

Wen-bing

Xia

et al. 2011

Environ Monit Assess

View full text Add to dashboard Cite

Fly ash samples were taken from solid waste incinerators with different feeding waste, furnace type, and air pollution control device in six cities of Zhejiang province. The solid waste incinerators there constitute one fifth of incinerators in China. Heavy metals and polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) were analyzed in the fly ash. Moreover, the fly ash samples were extracted by toxicity characteristic leaching procedure (TCLP). The biotoxicity of the leachate was evaluated by Chlorella pyrenoidosa. High variation and contents were found for both the heavy metals and PCDD/Fs. The contents of Zn, Cu, As, Pb, Cd, Cr, Ni, and Hg in the fly ash samples varied from 300 to 32,100, 62.1-1175, 1.1-57, 61.6-620, 0.4-223, 16.6-4380, 1.2-94.7, and 0.03-1.4 μg g(-1) dw, respectively. The total contents of 17 PCDD/Fs varied from 0.1128 to 127.7939 μg g(-1) dw, and the 2,3,7,8-TeCDD toxic equivalents (TEQ) of PCDD/Fs ranged from 0.009 to 6.177 μg g(-1) dw. PCDF congeners were the main contributor to the TEQ. The leachate of the fly ash showed biotoxicity to C. pyrenoidosa. A significant correlation was found between the Cd and EC(50) values. Further research is required to investigate the environmental impact of the various pollutants in the fly ash.

show abstract

Degradation of PCDD/Fs by mechanochemical treatment of fly ash from medical waste incineration

Cited by 86 publications

References 14 publications

The PCDD/F Removal Efficiency of a Medical Waste Incinerator Dual-Bag Filter System

The PCDD/F Removal Efficiency of a Medical Waste Incinerator Dual-Bag Filter System

Fly Ash Pollutants, Treatment and Recycling

Heavy metals and PCDD/Fs in solid waste incinerator fly ash in Zhejiang province, China: chemical and bio-analytical characterization

Contact Info

Product

Resources

About