期刊
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
卷 12, 期 6, 页码 6725-6744出版社
MDPI
DOI: 10.3390/ijerph120606725
关键词
Yellow River; heavy metals; particle size; fluxes
资金
- Chinese Natural Sciences Foundation [41276070]
- National Natural Science Foundation for Creative Research Groups [41221004]
- Oceanic Public Science and Technological Research Projects Fund [201105015-9]
Variations in the concentrations of particulate heavy metals and fluxes into the sea in the Yellow River were examined based on observational and measured data from January 2009 to December 2010. A custom-built water elutriation apparatus was used to separate suspended sediments into five size fractions. Clay and very fine silt is the dominant fraction in most of the suspended sediments, accounting for >40% of the samples. Cu, Pb, Zn, Cr, Fe and Mn are slightly affected by anthropogenic activities, while Cd is moderate affected. The concentrations of heavy metals increased with decrease in particle size. For suspended sediments in the Yellow River, on average 78%-82% of the total heavy metal loading accumulated in the <16 m fraction. About 43% and 53% of heavy metal in 2009 and 2010 respectively, were readily transported to the Bohai Sea with truly suspended particles, which have potentially harmful effects on marine organisms.
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