Table 3 Source profiles of PFASs obtained from the PCA-MLR and PMF models.

From: Spatial distribution and source apportionment of PFASs in surface sediments from five lake regions, China

Compound

PCA factor loadings

PMF source composition (ng/g dw)

Factor 1

Factor 2

Source 1

Source 2

Source 3

PFBA

−0.015

0.719

0.0034

0.0000

0.0509

PFPeA

0.027

0.900

0.0000

0.0034

0.0316

PFHxA

0.366

0.766

0.0000

0.0045

0.0317

PFHpA

0.730

0.461

0.0058

0.0034

0.0122

PFOA

0.823

0.202

0.0756

0.0454

0.0471

PFNA

0.698

0.247

0.0570

0.0022

0.0093

PFDA

0.862

0.154

0.0468

0.0290

0.0038

PFUnDA

0.900

0.034

0.1124

0.0197

0.0067

PFDoDA

0.951

0.068

0.0140

0.0116

0.0002

PFTrDA

0.903

0.100

0.0332

0.0097

0.0021

PFTeDA

0.834

0.015

0.0033

0.0034

0.0000

PFOS

0.674

0.028

0.0224

0.1602

0.0072

Possible source

Food-packaging, textile, electroplating, firefighting and semiconductor industry

Precious metals and coating industry

Food-packaging industry

Textile, electroplating, firefighting and semiconductor industry

Precious metals and coating industry

Contribution (%)

77.7

22.3

43.2

33.6

23.2

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