Journal of Marine Sciences ›› 2016, Vol. 34 ›› Issue (2): 75-82.DOI: 10.3969/j.issn.1001-909X.2016.02.010

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The horizontal distribution and affecting factors of dissolved heavy metals in seawater of Dongshan Bay, Fujian Province

YANG Miao-feng, ZHENG Sheng-hua, XI Ying-yu, ZHONG Shuo-liang*   

  1. Key Laboratory of Cultivation and High-value Utilization of Marine Organisms in Fujian Province, Fishery Research Institute of Fujian, Xiamen 361013, China
  • Received:2015-10-14 Revised:2016-03-01 Online:2016-06-15 Published:2022-11-24

Abstract: Base on the investigation of Dongshan Bay in May (spring) and August (summer) 2011, the horizontal distribution and its influencing mechanism of dissolved heavy metals (Cu, Pb, Zn, Cd and Cr(T)) in seawater were analyzed. The results indicated that: (1) The distribution of the heavy metals tended to be a peak source in the southwest sea areas and gradually decreased from west to east, whereas the trend of seasonal variation showed that the heavy metal contents in summer were higher than those in spring except Zn. (2) Since 1980s, changing trend of Cu, Pb and Cd contamination basically showed inverse “U” pattern conforming to environmental Kuznets curves while the content of Zn in seawater increased year after year. (3) The correlations between the dissolved heave metals were analyzed using the mathematic statistic method. It showed that except Cr(T), among the rest 4 heavy metals, each two had a significant positive correlation in spring, while in summer, only Cu-Cd and Cd-Cr(T) had a positive correlation. (4) Temperature, salinity, pH, COD, DO, nutrient and the biological effects were the main affecting factors for the variation of dissolved heavy metal contents in seawater.

Key words: Dongshan Bay, heavy metal, horizontal distribution, affecting factor

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