Journal
MARINE POLLUTION BULLETIN
Volume 117, Issue 1-2, Pages 124-130Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2017.01.041
Keywords
Trihalomethanes; Spatiotemporal distribution; Species sensitivity distribution model; Ecological risk assessment; Haihe River estuary
Funding
- National Nature Science Foundation of China [51308305]
- National Key Research and Development Programme of China [2016YFC040118]
- Programme for New Century Talents in University of China
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To characterize the spatiotemporal distribution and potential ecological risk for trihalomethanes (THMs) in the surface water of a river estuary, surface water samples were collected over five consecutive months (from March to July 2016) from four sites in the Haihe River estuary of Bohai Bay. The potential ecological risks of THMs were evaluated quantitatively based on a species sensitivity distribution (SSD) model. The results demonstrate that trichloromethane (TCM) was the predominant THM in surface water of the Haihe River estuary (2.93 +/- 1.98 mu g/L) followed by tribromomethane (TBM) (0.42 +/- 0.33 mu g/L), bromodichloromethane (BDCM) (0.14 +/- 0.06 mu g/L) and dibromochloromethane (DBCM) (0.09 +/- 0.10 mu g/L). The concentration of TCM was higher in summer than that in spring, while TBM displayed the opposite trend. The TCM concentration decreased from the estuary to the adjacent sea. However, the levels of TBM and DBCM in the adjacent sea were higher than those in the estuary. The ecological risks of THMs in surface water of Haihe River were notably low, and the ecological risks of THMs in freshwater were generally higher than those in seawater. Compared with other contaminants in water and surface sediment from rivers and coastal areas, the ecological risk levels of THMs in surface water can be considered low. This study is a contribution to the progress of ecological risk assessment of THMs. (C) 2017 Published by Elsevier Ltd.
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