Distribution of dioxins, furans, and dioxin-like PCBs in solid products generated by pyrolysis and melting of automobile shredder residues

Hyun Tae Joung, Yongchil Seo, Ki Heon Kim

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, and dioxin-like polychlorinated biphenyls (PCBs) in char and slag produced from automobile shredder residue by pyrolysis and melting process were analyzed to measure changes in the characteristics and distribution of their congeners caused by thermal treatment. In particular, a large quantity of dioxin-like PCBs occurred in low-chlorinated congeners. The concentration of PCDDs/PCDFs in char was 0.542 μg/kg, with mostly PCDFs dominant and its toxicity equivalent concentration (TEQ) was about 70 ng TEQ/kg. The concentration and toxicity equivalent concentration of dioxin-like PCBs in char were 0.869 μg/kg and 1.60 ng TEQ/kg, respectively. Melted char slag was produced using various cooling methods: water quenching, air cooling, and slow cooling. The concentrations of PCDDs/PCDFs in slag produced by the methods were 1.51, 1.38, and 2.43 ng TEQ/kg, respectively; those of dioxin-like PCBs were close to 0.01 ng TEQ/kg. The congener distributions varied only slightly among the cooling methods. Applying melting procedure to char reduced PCDD/PCDF concentration by 95.3%, and the corresponding TEQ concentration was reduced by 97.9%. We thus conclude that melting process is an efficient way to reduce the concentrations of PCDDs/PCDFs in solids produced by pyrolysis.

Original languageEnglish
Pages (from-to)1636-1641
Number of pages6
JournalChemosphere
Volume68
Issue number9
DOIs
Publication statusPublished - 2007 Aug 1

Fingerprint

Furans
Automobiles
Dioxins
Trout
furan
Polychlorinated Biphenyls
Polychlorinated biphenyls
dioxin
PCDF
pyrolysis
Freezing
Toxicity
automobile
PCB
Melting
Pyrolysis
melting
toxicity
PCDD
slag

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

Cite this

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title = "Distribution of dioxins, furans, and dioxin-like PCBs in solid products generated by pyrolysis and melting of automobile shredder residues",
abstract = "Polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, and dioxin-like polychlorinated biphenyls (PCBs) in char and slag produced from automobile shredder residue by pyrolysis and melting process were analyzed to measure changes in the characteristics and distribution of their congeners caused by thermal treatment. In particular, a large quantity of dioxin-like PCBs occurred in low-chlorinated congeners. The concentration of PCDDs/PCDFs in char was 0.542 μg/kg, with mostly PCDFs dominant and its toxicity equivalent concentration (TEQ) was about 70 ng TEQ/kg. The concentration and toxicity equivalent concentration of dioxin-like PCBs in char were 0.869 μg/kg and 1.60 ng TEQ/kg, respectively. Melted char slag was produced using various cooling methods: water quenching, air cooling, and slow cooling. The concentrations of PCDDs/PCDFs in slag produced by the methods were 1.51, 1.38, and 2.43 ng TEQ/kg, respectively; those of dioxin-like PCBs were close to 0.01 ng TEQ/kg. The congener distributions varied only slightly among the cooling methods. Applying melting procedure to char reduced PCDD/PCDF concentration by 95.3{\%}, and the corresponding TEQ concentration was reduced by 97.9{\%}. We thus conclude that melting process is an efficient way to reduce the concentrations of PCDDs/PCDFs in solids produced by pyrolysis.",
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Distribution of dioxins, furans, and dioxin-like PCBs in solid products generated by pyrolysis and melting of automobile shredder residues. / Joung, Hyun Tae; Seo, Yongchil; Kim, Ki Heon.

In: Chemosphere, Vol. 68, No. 9, 01.08.2007, p. 1636-1641.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Distribution of dioxins, furans, and dioxin-like PCBs in solid products generated by pyrolysis and melting of automobile shredder residues

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N2 - Polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, and dioxin-like polychlorinated biphenyls (PCBs) in char and slag produced from automobile shredder residue by pyrolysis and melting process were analyzed to measure changes in the characteristics and distribution of their congeners caused by thermal treatment. In particular, a large quantity of dioxin-like PCBs occurred in low-chlorinated congeners. The concentration of PCDDs/PCDFs in char was 0.542 μg/kg, with mostly PCDFs dominant and its toxicity equivalent concentration (TEQ) was about 70 ng TEQ/kg. The concentration and toxicity equivalent concentration of dioxin-like PCBs in char were 0.869 μg/kg and 1.60 ng TEQ/kg, respectively. Melted char slag was produced using various cooling methods: water quenching, air cooling, and slow cooling. The concentrations of PCDDs/PCDFs in slag produced by the methods were 1.51, 1.38, and 2.43 ng TEQ/kg, respectively; those of dioxin-like PCBs were close to 0.01 ng TEQ/kg. The congener distributions varied only slightly among the cooling methods. Applying melting procedure to char reduced PCDD/PCDF concentration by 95.3%, and the corresponding TEQ concentration was reduced by 97.9%. We thus conclude that melting process is an efficient way to reduce the concentrations of PCDDs/PCDFs in solids produced by pyrolysis.

AB - Polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, and dioxin-like polychlorinated biphenyls (PCBs) in char and slag produced from automobile shredder residue by pyrolysis and melting process were analyzed to measure changes in the characteristics and distribution of their congeners caused by thermal treatment. In particular, a large quantity of dioxin-like PCBs occurred in low-chlorinated congeners. The concentration of PCDDs/PCDFs in char was 0.542 μg/kg, with mostly PCDFs dominant and its toxicity equivalent concentration (TEQ) was about 70 ng TEQ/kg. The concentration and toxicity equivalent concentration of dioxin-like PCBs in char were 0.869 μg/kg and 1.60 ng TEQ/kg, respectively. Melted char slag was produced using various cooling methods: water quenching, air cooling, and slow cooling. The concentrations of PCDDs/PCDFs in slag produced by the methods were 1.51, 1.38, and 2.43 ng TEQ/kg, respectively; those of dioxin-like PCBs were close to 0.01 ng TEQ/kg. The congener distributions varied only slightly among the cooling methods. Applying melting procedure to char reduced PCDD/PCDF concentration by 95.3%, and the corresponding TEQ concentration was reduced by 97.9%. We thus conclude that melting process is an efficient way to reduce the concentrations of PCDDs/PCDFs in solids produced by pyrolysis.

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