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Table 3 Estimated risk quotients of 6 PFCs in surface water in Liaohe River

From: Partitioning behavior, source identification, and risk assessment of perfluorinated compounds in an industry-influenced river

Compound Range of concentrations in surface water (ng/L) EQSa (ng/L) RQ
PFBA n.d–22.26 1400 0–0.0159
PFPA n.d–7.26 600 0–0.0121
PFHxA n.d–33.14 200 0–0.1657
PFOA 0.37–73.94 20 0.01889–3.3971
PFNA n.d–11.56 100,000 0–0.0001
PFDA n.d–1.76 11,000 0–0.0001
PFBS n.d–6.44 600 0–0.0107
PFOS n.d–46.12 50 0–0.9223
  1. aEQS of PFBA, PFPA, PFHxA, PFOA, PFBS were obtained from Valsecchi et al. [42]; EQS of PFOS was obtained from Brooke et al. [43]; EQS of PFNA and PFDA were obtained from Hoke et al. [44]