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Published on: April 19, 2018
Heavy metal pollution in the Jiaodong peninsula: Spatial patterns, elemental mobility, and source-derived ecological
Yang Liu1, Xiaoyuan Gu2, Jianwei Sun2
1Qingdao Institute of Marine Geology, China Geological Survey, Qingdao, 266237, China; Laboratory for Marine Geology, Qingdao Marine Science and Technology Center, Qingdao, 266237, China; Chinese Academy of Geological Sciences, 100037, Beijing, China.
None:
This study investigates heavy metal (HM) pollution in the Jiaodong Peninsula and adjacent marine areas, focusing on spatial distribution, ecological assessment, elemental mobility, and source-specific contributions. About 90.6 % of the land area is in a low contamination state, and localized hotspots were evident, particularly in Penglai, which emerged as a center of multi-element accumulation. Most HMs originated from terrestrial inputs and nearby marine waters, with minimal influence from long-range transport. Distinct transport mechanisms were observed: Cr, Cu, Ni, Pb, and Zn were mainly carried by fine particles; As and Cd occurred predominantly in dissolved phases; and Hg was introduced via dissolved gaseous species or inorganic chloride complexes. In the sea area, As exhibits the highest mobility, followed by Cd and Cr. Source apportionment revealed four major contributors and ecological impact: industrial (12.89 % and 66.7), traffic (29.81 % and 15.4), natural (38.95 % and 5.5), and agricultural (18.36 % and 4.4). Industrial and traffic pollution pose the greatest ecological risks and should be prioritized for control.
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