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Environmental fate & pathways

Adsorption / desorption

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Administrative data

Endpoint:
adsorption / desorption
Remarks:
adsorption
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Secondary source, peer-reviewed data, acceptable for assessment

Data source

Referenceopen allclose all

Reference Type:
review article or handbook
Title:
Unnamed
Year:
2008
Reference Type:
review article or handbook
Title:
Unnamed
Year:
2009

Materials and methods

Principles of method if other than guideline:
Atmospheric monitoring of PAH: distribution in gas and particle phase
GLP compliance:
no
Type of method:
other: atmospheric monitoring
Media:
other: particle and gasphase

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
CAS-No. Concentration [%w/w] *
=====================================
Phenanthrene 85-01-8 0.25 - 0.30
Anthracene 120-12-7 ~ 0.06
Fluoranthene 206-44-0 0.7 - 0.85
Pyrene 129-00-0 0.6 - 0.75
Benz(a)anthracene 56-55-3 0.6 - 0.7
Chrysene 218-01-9 0.8 - 0.85
Benzo(a)pyrene 50-32-8 0.8- 1.1
=====================================
* Concentrations in coal-tar pitch CS08 (GC analysis)
Specific details on test material used for the study:
Details on properties of test surrogate or analogue material (migrated information):
no data
Radiolabelling:
no

Study design

Test temperature:
ambient temperature

HPLC method

Details on study design: HPLC method:
not applicable

Batch equilibrium or other method

Analytical monitoring:
yes
Details on sampling:
no data
Details on matrix:
air particles
Details on test conditions:
no data
Computational methods:
not applicable

Results and discussion

Results: HPLC method

Details on results (HPLC method):
not applicable

Results: Batch equilibrium or other method

Adsorption and desorption constants:
no constants given (see below)
Recovery of test material:
not applicable
Concentration of test substance at end of adsorption equilibration period:
not applicable
Concentration of test substance at end of desorption equilibration period:
not applicable
Transformation products:
not measured
Details on results (Batch equilibrium method):
not applicable
Statistics:
not applicable

Any other information on results incl. tables

Excerpt from

ANNEX XV TRANSITIONAL DOSSIER - CTPHT CAS 65996-93-2, SECTION B. INFORMATION ON HAZARD AND RISK, B.4.1.1 Atmospheric degradation (or fate in the atmosphere)

. . . In the atmosphere PAHs are partitioned between the gas and particle phases, with the gas-particle partitioning depending on a number of factors, including the liquid-phase (or sub-cooled liquid-phase) vapour pressure of the PAH at the ambient atmospheric temperature, the surface area of the particles per unit volume of air, and the nature of the particle (Wania & Mackay, 1996; Pankow, 1987; Bidleman, 1988). As a first approximation, chemical compounds with liquid-phase vapour pressure of PL< 10-5 Pa at the ambient atmospheric temperature are present in the particle phase, and those with values of PL> 10-2 Pa at the ambient atmospheric temperature are essentially totally in the gas phase (Arey & Atkinson, 2003). As shown in measurements performed in Norway (Oslo), Germany (Bayreuth) and California USA (Torrance), the 2-4 ring PAHs with vapour pressures ≥ 10-4 Pa are largely gas-phase species, whereas PAHs with 4 rings or more, with vapour pressure < 10-4 Pa are particle-associated (see Table B.4.1).

TableB.4.1.    Summary of gas-particle phase partitioning

(PAH in bold = selected components of coal-tar pitch)

PAH (number of rings)

Vapour pressure (Pa)a)

Observed % in particulate phase

Naphthalene (2)

1.1·101

0b)

0e)

Acenaphthylene (3)

1.3·10-1

Acenaphthene (3)

4.0·10-1

Fluorene (3)

1.1·10-1

0b)

Anthracene (3)

8.7·10-4

3b)

0.5e)

Phenanthrene (3)

2.0·10-2

3b)

12.4c)

1.9d)

0.4e)

Fluoranthene (4)

6.0·10-3

54b)

49.7c)

19.1d)

5.9e)

Pyrene (4)

4.4·10-4

57b)

61.4c)

29.6d)

7.5e)

Benz(a)anthracene (4)

2.1·10-6

97b)

89.4c)

62.7d)

Chrysene (4)

1.4·10-6

99b)

Benzo(b)fluoranthene(5)

1.0·10-6

100b)

92.2c)

92.3d)

Benzo(a)pyrene (5)

5.3·10-8

100b)

100c)

100d)

98.3e)

Perylene (5)

1.8·10-8

100b)

90.0e)

Dibenzo[a,c]anthracene (5)

5.7·10-9

100b)

Dibenzo(a,h)anthracene (5)

4.9·10-9

100b)

100c)

100d)

Benzo(ghi)perylene (6)

1.0·10-8

100b)

100c)

100d)

Summary as given in EC (2001b).a)Vapour pressures taken from Neiderfellner et al.(1997) and Oja & Suuberg (1998);

b)Measurements made in Oslo, January/February 1979 (Thrane & Mikalsen, 1981);

c)Annual mean measurements made in Bayreuth, Germany, May 1995-April 1996 (Horstmann & McLachlan, 1998);

d)Summer mean measurements made in Bayreuth, Germany, May-October 1995 (Horstmann & McLachlan, 1998);

e)Measurements made in Torrance, California, February 1986 (Arey et al., 1987).

References:

  • Arey J, Zielinska B, Atkinson R, Winer AM (1987) Polycyclic aromatic hydrocarbon and nitroarene concentrations in ambient air during a winter-time high NOX episode in the Los Angeles basin. Atmosph Environ 21: 1437-1444.
  • Bidleman, TF (1988) Atmospheric processes. Environ Sci Technol 22: 361-367.
  • EC (2001b) Ambient Air Pollution by Polycyclic Aromatic Hydrocarbons (PAH). Position Paper. Prepared by the Working Group on Polycyclic Aromatic Hydrocarbons. July, 2001.
  • Horstmann M, McLachlan MS (1998) Atmospheric deposition of semivolatile organic compounds to two forest canopies. Atmos Environ 32: 1799-1809.
  • Neiderfellner J, Lenoir D, Matuschek G, Rehfeldt F, Utschick H, Bruggeman R (1997) Description of vapour pressures of polycyclic aromatic hydrocarbons by graph theoretical indices. Quant Struct-Act Relat 16: 38-48.
  • Oja V, Suuberg EM (1998) Vapor pressures and enthalpies of sublimation of polycyclic aromatic hydrocarbons and their derivatives. J Chem Eng Data 43: 486-492.
  • Pankow JF (1987) Review and comparative analysis of the theories on portioning between the gas and aerosol particulate phases in the atmosphere. Atmos Environ 21: 2275-2283.
  • Thrane KE, Mikalsen A (1981) High-volume sampling of airborne polycyclic aromatic hydrocarbons using glass fibre filters and polyurethane foam. Atmos Environ 15: 909-918.
  • Wania F, Mackay D (1996) Tracking the distribution of persistent organic pollutants. Environ Sci Technol 30: 390-396.

Applicant's summary and conclusion

Validity criteria fulfilled:
not applicable