Removal of PCDD/Fs from Flue Gas by a Fixed-Bed Activated Carbon Filter in a Hazardous Waste Incinerator

Karademır, Aykan; Bakoǧlu, Mithat; Taşpınar, Fatih; Ayberk, Savaş

doi:10.1021/es034681k

Cited by 77 publications

(53 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All initial concentrations are average values of three samples. The distribution of 17 toxic PCDD/Fs congeners is shown in Table1, nearly similar with previous investigation Karademir et al, 2004;Yu et al, 2016b). The I-TEQ concentration of PCDFs is higher than PCDDs and 2,3,4,7 and 8-PeCDF is the dominant I-TEQ contributor.…”

Section: The Effect Of Initial Concentration On the Removal Of Pcdd/fssupporting

confidence: 85%

“…In present study, the contact time is fixed due to constant flow rate of carrier gas. And the low removal efficiency of PCDD/Fs at low concentration may be attribute to that the contact time is not enough long for the adsorption of dioxin at lower concentration level (Karademir et al, 2004). Both of them explain that small contact area and short contact time can result in low RE at low concentration.…”

Section: The Effect Of Initial Concentration On the Removal Of Pcdd/fsmentioning

confidence: 99%

“…Relative study (Lee et al, 2016) also showed that higher chlorinated PCDD/Fs are much easier captured by particle. Probably, vapour pressure plays a dominant role (Karademir et al, 2004;Hung et al, 2011;Ji et al, 2014;Yu et al, 2016a). Generally, high chlorinated PCDD/Fs with lower vapour pressure have lower gaseous fractions at a specific temperature as compared to low chlorinated ones.…”

Section: The Effect Of Adsorption Temperature On the Removal Pcdd/fsmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Study on PCDD/Fs Adsorption onto Nano-Graphite

Lin

et al. 2016

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

The adsorption of the 17 toxic 2,3,7,8-substituted dioxin congeners onto graphite was investigated using a laboratoryscale fixed-bed adsorption system. First, the morphology and microstructure of graphite were characterized by Scanning Electron Microscopy and Brunauer-Emmer-Teller surface estimation. Removal efficiency of the 17 toxic PCDD/Fs varies from 89.31% to 99.96% and the amount adsorbed on graphite is a linear function of the inlet concentration of PCDD/Fs, as it was varied from 2.3-20.7 ng I-TEQ Nm -3 . Operating over 3 hours, it is observed that the saturation time of fixed-bed adsorbers is less when the inlet concentration is higher. The removal efficiency of dioxin depends on vapour pressure and rises strongly with increasing chlorine substitution number. Removal efficiencies strongly correlate with vapour pressure, with R 2 0.96 for PCDDs and 0.99 for PCDFs, respectively. The removal efficiency of dioxin decreases linearly as the temperature increased (R 2 = 0.99). Possibly, π-π interactions between PCDD/Fs and graphite sheets lead to a high adsorption capacity of dioxin. The high mesopores volume and pore structure of graphite are critical factors when adsorbing dioxin.

show abstract

Section: The Effect Of Initial Concentration On the Removal Of Pcdd/fssupporting

confidence: 85%

Section: The Effect Of Initial Concentration On the Removal Of Pcdd/fsmentioning

confidence: 99%

Section: The Effect Of Adsorption Temperature On the Removal Pcdd/fsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Study on PCDD/Fs Adsorption onto Nano-Graphite

Lin

et al. 2016

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

show abstract

“…The PCB homolog removal efficiency by the desulfurization systems increased with increasing chlorination levels of the congeners. Generally, lower chlorinated PCBs with higher vapor pressures are more likely to distribute to gaseous phase, while higher chlorinated PCBs are more likely to distribute to solid phase (Karademir et al 2004). Solid particles in sintering flue gas were intercepted by desulfurization systems, since the systems can effectively remove solid-phase PCBs and it is ineffective in removing particle-phase PCBs.…”

Section: Pcb Concentration Profiles In Flue Gas and Gypsum Samplesmentioning

confidence: 99%

Removal of polychlorinated biphenyls by desulfurization and emissions of polychlorinated biphenyls from sintering plants

Wang

Hou

Zhao

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

The influence of desulfurization on polychlorinated biphenyls (PCBs) from sintering plants was investigated. The concentrations of dioxin-like (dl) PCBs, toxic equivalents (TEQs), indicator PCBs, and total tri-to deca-chlorinated PCB homolog groups (∑PCBs) in the flue gases at the desulfurization system inlets were 290-1906 pg m −3 (2.4-18.8 pg World Health Organization (WHO) TEQ m −3 ), 420-2885 pg m −3 , and 6496-22,648 pg m −3 , respectively. Desulfurization reduced the values to 43.3-500 pg m −3 (0.46-9.5 pg WHO-TEQ m −3 ), 183-587 pg m −3 , and 2383-11,639 pg m −3 , respectively. The removed PCBs were adsorbed by gypsum from the flue gas; the PCB concentration distributions at the inlets and outlets and in the gypsum samples were similar. The emission factors were 9.86 ng WHO-TEQ t −1 for the flue gas and 8.37 ng WHO-TEQ t −1 for gypsum. Desulfurization decreased the annual atmospheric PCB emissions from 48.6 to 30.7 g WHO-TEQ, and the estimated annual emissions in gypsum were 8.06 g WHO-TEQ. PCBs in the gypsum have not been effectively eliminated and will probably reenter the environment and in turn become a new source of PCB emission. The PCB concentrations in fly ashes from series-connected electrostatic precipitators clearly increased.

show abstract

“…First, combustion had not sufficiently when waste was fed, PIC still existed. The second reason might be that the highly chlorinated PCDD/Fs with low vapor pressure easily adhered to the particles that were removed by bag filter when APCDs applied (Chang et al, 2002;Karadenir et al, 2004), so the chlorination degree of PCDD/Fs continued to decrease when waste was fed. Precursor formation of PCDD/Fs is a main pathway during start-up (Hunsinger et al, 2002;Aurell and Marklund, 2009) since high amounts of PIC (including chlorophenols) are formed and formation of PCDF (especially low-chlorinated) is favoured (Nakahata and Mulholland, 2000).…”

Section: Pcdd/f Emission At the Stackmentioning

confidence: 99%

PCDD/F and PCBz Emissions during Start-up and Normal Operation of a Hazardous Waste Incinerator in China

Lin

Huang

Chen

et al. 2014

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

The PCDD/F emissions from incinerator start-up are a major contributor to the total amount of such emissions, as has been reported in studies of numerous municipal solid waste incinerators. However, very few studies have examined the start-up process at hazardous waste incinerators (HWIs). In this work we studied the emissions of PCDD/Fs and other pollutants, such as PCBz, at the stack during start-up and normal operations in a HWI. We found that the PCDD/F emissions during start-up were greater than during normal operations, and were comparable to the annual emissions during the normal combustion regime. The emissions of PCDD/Fs were highest during start-up when the temperature was around 500°C, reaching 59.5 ng/Nm 3 (5.49 ng I-TEQ/Nm 3 ) when no APCDs were applied. The emission values of PCDD/Fs during start-up with the application of APCDs and during normal operations were very low, which indicates the importance of APCDs when starting up a HWI, as well as before feeding waste. The chlorination degree, the ratio of PCDFs/PCDDs and the congener profiles were also discussed during start-up and normal operations, with the results suggesting different formation mechanisms of PCDD/Fs. PCBz emissions are two or three orders of magnitude higher than those of PCDD/Fs, and 1,2,4,5-TeCBz was the best correlated PCBz used as a PCDD/F indicator in real HWI flue gas.

show abstract

Removal of PCDD/Fs from Flue Gas by a Fixed-Bed Activated Carbon Filter in a Hazardous Waste Incinerator

Cited by 77 publications

References 16 publications

Experimental Study on PCDD/Fs Adsorption onto Nano-Graphite

Experimental Study on PCDD/Fs Adsorption onto Nano-Graphite

Removal of polychlorinated biphenyls by desulfurization and emissions of polychlorinated biphenyls from sintering plants

PCDD/F and PCBz Emissions during Start-up and Normal Operation of a Hazardous Waste Incinerator in China

Contact Info

Product

Resources

About