Persistent organochlorine pollutants in cyprinids from the Lake Khanka (Spassky District, Primorsky Krai, Russia)

Abstract

Present study provides data of organochlorine pesticides (DDT, HCH) and polychlorinated biphenyls (28, 52, 155, 101, 118, 143, 153, 138, 180, 207 congener) content in six carp fish from Lake Khanka. Organochlorine compounds are found in all studied samples. HCHs isomers were dominant, constituting on average 70% of all pesticides detected. α-HCH content varied from 8 to 95%. Among DDTs, o,p’- and p,p’-DDE were predominant (on average 10–100 and 15–100%, respectively). PCBs content in all fish samples was primarily presented by low-chlorinated 28 and 52 congeners. Detected isomers evidence on the long-term pollution of Lake Khanka by persistent organic pollutants. Compare to southern China and Croatia, fish from Lake Khanka showed significantly higher levels of accumulation of HCH and lower levels of DDT and PCB. When comparing the data with the requirements of regulatory documents in Russia and China, no cases of exceeding maximum permissible concentrations were identified.

Keywords

• ocps
• pops
• pcbs
• cyprinidae
• freshwater ecosystems