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Table 4 Evaluation indices of PAHs for the water from Lake Taihu

From: Characteristics of petroleum contaminants and their distribution in Lake Taihu, China

Index

Combustion sources

Sources of oil pollution

Lake water

Phe/Ant a

Less than 10

Greater than 15

Greater than 15

Chr/BaA

less than 1

Greater than 1

0.70-4.03

Flu/(Flu + Pyr)

Greater than 0.4

Less than 0.4

0.25-0.67

IP/(IP + BghiP)

Less than 0.2

Less than 0.2

-b

LMW/HMW

Low

High

10.57-112.84

  1. Note:
  2. a: Phe: Phenanthrene; Ant: Anthracene; Chr: Chrysene; BaA: Benz[a]anthracene; Flu: fluoranthene; Pyr: pyrene; IP: Indenoindenes; BghiP: Benzo[ghi]perylene;
  3. LMW/HMW: The ratio of 2-ring and 3-ring PAHs to 4-ring PAHs.
  4. b: Not detected.
  5. The evaluation indices of PAHs in Lake Taihu are shown in Table 4, these indices include Phe/Ant, Chr/BaA, Flu/(Flu + Pyr), IP/(IP + BghiP) and LMW/HMW, from which the sources of PAHs can be distinguished