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| Occurrence and ecological risk assessment of persistent organic pollutants in Meizhou Bay |
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Abstract A comprehensive survey on the pollution characteristics of persistent organic pollutants (POPs) of surface water body in Meizhou Bay was carried out. The survey showed that the concentration of organic chlorine pesticides (OCPs), polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) were determined in surface water body of Meizhou Bay, with their concentration ranged from 1.51 to 10.3ng/L (natural average (4.28±2.72) ng/L)、5.31~42.6ng/L (natural average (18.5±10.6) ng/L) and 125~167ng/L (natural average( 145±11.8) ng/L), respectively. Compared with other domestic sea water, POPs levels of Meizhou Bay were in the lower medium level. Different kinds of POPs of Meizhou bay water body were significantly different in spatial distribution. The HCHs distribution proved the uses of industrial HCHs and Lindane in this region; DDTs was mainly industrial residue with new input; the main source of PCBs was possible from the sewage of chemical enterprises along the coast. PAHs were mostly from oil; it was caused by intensive oil terminals and frequent transportation. According to the environment quality criteria, the concentration of PCBs in surface water was beyond the risk limit value, which may harm the ecological environment. Therefore the corresponding pollution control and emission reduction measures should be taken.
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Received: 17 December 2013
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