AOX contamination in Hangzhou Bay, China: Levels, distribution and point sources
2018
Xie, Ya-Wei | Chen, Lu-Jun | Liu, Rui | Tian, Jin-Ping
The parameter AOX (adsorbable organic halogens) indicates the total amount of organic halogens in an environment. Seawater and surface sediment samples from 12 sample sites in the Hangzhou Bay (HZB), China, were analyzed for AOX to investigate its contamination status. In this study, the AOX concentration ranged from 140.6 ± 45.6 μg/L to 716.1 ± 62.3 μg/L in seawater of the HZB, and from 11.3 ± 2.4 mg/kg to 112.7 ± 7.2 mg/kg in the sediment. Ocean currents, fluvial currents and the Yangtze River exerted profound influences on the distribution of AOX in the HZB. The point sources around the HZB, represented by wastewater treatment plants, discharged at least 645.4 t AOX into the HZB every year, most of which was generated by industrial activities rather than the human daily activities.
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