Distribution and eco-toxicological risk characteristics of polycyclic aromatic hydrocarbons in water from Changdang Lake, China | JBES 2022

This study aimed to investigate characteristics of Polycyclic Aromatic Hydrocarbons in Changdang Lake, China during March (dry season), June (wet season) and September (Moderate Season). The average concentration of polycyclic aromatic hydrocarbons in March averaged 100.08ng /L (35.31~200.38ng/L), June 154.72ng/L (100.80~218.74ng/L), and in September 93.77ng/L (66.75~106.41ng/L). Among them, the residual benzo(a)pyrene was 5.90ng/L in water. By applying the redundancy analysis, results showed higher correlation between the fraction of 10-100kDa organic matter and the residues of higher rings PAHs (BbF, BkF, DahA, Bghip) and middle-rings PAHs (Ace and Chr). According to the risk classification of individual PAHs in water, the eco-toxicological risks of Ace, BaA, BbF, BaP and BkF in March, the Nap, Ace, Flu, Phe, Ant and BaA in June and Nap, Ace, Flu, Phe, Ant, BaA and BbF in September had reached moderate risk level. The lowest toxicological risk of PAHS in the Lake was found at site 2#and 3#, located near the center of the Lake. This study results also revealed that combine treatment processes of activated carbon and ultra-filtration membrane were quite efficient in removing PAHs from the water of Changdang Lake. Results obtained from this study meets the reqEuirements of “drinking water health standards” (GB5749-2006) (PAHs