CHANGES OF HEAVY METAL CONTENT IN SEDIMENTS AT HAIZHOU BAY AND RISK ASSESSMENT

Y M ZHANG
2019 Applied Ecology and Environmental Research  
This research studied the six heavy metal contents, their distribution and the level of pollution in sediments at Haizhou Bay in 2009 and 2014. It was found that the content of cadmium (Cd), lead (Pb), zinc (Zn) and copper (Cu) accounted for the major factors in the sediments at Haizhou Bay. The content of major pollutants presented a declining trend from south to north, and the Pb-intensive area moved from the southern waters of the study area in 2009 to the northern waters of Ganyu Port in
more » ... 4. Analysis of the pollution load index shows that the study area suffers from medium-level pollution; the most polluted area was the waters around the estuary of Dragon-King River in 2009 and Ganyu Port in 2014, which meant that development of the port had significant impact on the heavy metal contents. Assessment based on the geo-accumulation index shows that Pb pollution deteriorated and Cd pollution abated slightly over the past 5 years. Analysis of comprehensive potential risk index indicates that the ecological risk of the study area from 2009 to 2014 was at the low-medium level, with Cd being the major contributor to the risks.
doi:10.15666/aeer/1705_1132711339 fatcat:xutho6grhvb6bfgdzshzu27btq