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Environmental Sciences Europe

Table 1 Substance related parameter used for optimization. n.d. not determined

From: Transformation, leaching and plant uptake simulations of 6:2 and 8:2 polyfluoroalkyl phosphate diesters (diPAPs) and related transformation products under near-natural conditions

 

Dimension

Precursors

PFCA’

6:2 diPAP

8:2 diPAP

PFPeA

PFHxA

PFHpA

PFOA

KD

l/kg

1–100

1–100

0–0.40

0–0.72

0–1.25

0–3.50

θAE

%

–

–

0–10

0–10

0–5

0–5

Freundlich n

–

0.7–1.3

0.7–1.3

0.7–1.3

0.7–1.3

0.7–1.3

0.7–1.3

\(\mu\) ref,s,mi

1/days

n.d

n.d

–

–

–

0–1

\(\mu\) ref,l,mi

1/days

2

2

–

–

–

–

fc

–

0–1

0–1

0–1

0–1

0–1

0–1

  1. KD = distribution coefficient, \(\theta_{ae}\) = anion exclusion, \(\mu\) ref,s,mi = NER formation in the solid phase of the micropores, \(\mu\) ref,l,mi = transformation rate in the liquid phase of the micropores
  2. 6:2 diPAP: 6:2 polyfluoroalkyl phosphate diesters, 8:2 diPAP: 8:2 polyfluoroalkyl phosphate diesters, PFCA’: perfluorocarboxylic acids transformation product of a precursor, PFPeA: perfluoropentanoic acid, PFHxA: perfluorohexanoic acid, PFHpA: perfluoroheptanoic acid, PFOA: perfluorooctanoic acid
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