Journal
ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 68, Issue 2, Pages 225-236Publisher
SPRINGER
DOI: 10.1007/s00244-014-0087-6
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Funding
- National Natural Science Foundation of China [41103064]
- State Key Laboratory of Freshwater Ecology and Biotechnology [2014FBZ03]
- Youth Innovation Promotion Association of the Chinese Academy of Sciences
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Occurrence of five endocrine-disrupting chemicals (EDCs)-bisphenol-A (BPA), triclosan (TCS), 17 alpha-ethinyl estradiol (EE2), benzophenone-3, and 4-methylbenzylidene camphor-were monitored in East Lake, the largest urban lake in China. Other than EE2, all selected EDCs were detected at least once in the lake water with concentrations a parts per thousand currency sign89.1 ng/L. EDCs were detected with greater occurrence in spring than in other seasons. In lake sediment, TCS was detected at the greatest concentration (30.9 ng g(-1)), whereas BPA and EE2 were not detected. Spatial distribution of the EDCs in the lake water and the lake sediment showed similar patterns, and greater EDC residuals were found from those sites with known wastewater input. The linear adsorption coefficients (K (d)) varied from 17.9 to 1,017 L kg(-1) and were related to the octanol-water partition coefficient (K (ow)) values of the compounds. Photodegradation was a major process removing the EDCs from the lake water, and the presence of dissolved organic material and NO3 (-) in the lake water can accelerate the photodegradation process. Degradation of the EDCs in the lake sediment was relatively slow and occurred mainly due to the microbial processes. All compounds were found more persistent under anoxic conditions than under oxic conditions.
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