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Environmental Monitoring and Assessment

, Volume 164, Issue 1–4, pp 173–187 | Cite as

Assessment of dissolved heavy metal in the Yangtze River estuary and its adjacent sea, China

  • Qiang An
  • Yanqing Wu
  • Jinhui Wang
  • Zhien Li
Article

Abstract

The purpose of this paper is to determine the concentrations of dissolved heavy metals namely mercury (Hg), lead (Pb), cadmium (Cd), and copper (Cu) and to investigate the relationships between nutrients (nitrate-nitrogen and phosphate) and dissolved heavy metals. For this purpose, the concentrations of dissolved heavy metals were measured through 51 voyages form 1984 to 2006 in the Yangtze river estuary and its adjacent sea. Results analysis showed that dissolved heavy metals were not the main pollutants in the Yangtze river estuary, and the main source of heavy metal contamination was industrial wastewater from terrestrial pollution during the past 20 years. Heavy metal values showed significant abundance in the south branch of the Yangtze River estuary and Hangzhou Bay. In addition, Pb showed negative correlation with nutrients, while the positive correlations between Hg, Cd, and nutrients were shown. The obtained molar ratios, \(\Delta \mbox{Cd}/\Delta \mbox{N} = 1.68 \times 10^{-5}\) and \(\Delta \mbox{Cd}/\Delta \mbox{P} = 1.66 \times 10^{-4}\), are close to those in plankton, showing the biogeochemical behavior and process of dissolved cadmium.

Keywords

Dissolved heavy metal Spatial and temporal variation PCA Pearson’s correlation coefficient Yangtze River estuary 

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.School of Environmental Science and EngineeringShanghai Jiao Tong UniversityShanghaiChina
  2. 2.East China Sea Environmental Monitoring, Center of State Oceanic Administration (SOA)ShanghaiChina

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