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- W2355963833 abstract "In May,2010,surface sediment samples were collected from the high,middle and low inter-tidal zones along five sections in the Yellow River Estuary,and analysis were carried out on their physico-chemical properties as well as the distribution characteristics of heavy metals and nutrient elements across the area.Through adopting the index number techniques of single factor and Hakanson ecological risk and referring the sediment quality standards of Environment and Energy Department in the province of Ontario,Canada,quality status of these sediments were evaluated.Results showed that concentrations of most heavy metals and nutrient elements exhibited a higher tendency in the northern bank than the southern bank,except Cu and Pb;Concentrations of heavy metals and nutrient elements showed no significant differences among high,middle and low tidal flats except Hg,and hence no prominent vertical characteristics of a mature tidal flat were exhibited.The concentration of Pb was higher than the maximum value of surface sediment in Bohai Sea,making it the most important pollution factor in the research area;The concentration of Hg of low tidal flat at two stations near estuary severely exceeded the class Ⅰ standard of GB 18668-2002,namely,1.7 and 1.8 times of it respectively and possessed a certain potential ecological risk.TN and TOC were in the range of safety level,while TP at 20% stations exceeded the lowest safety level and possessed security risk to some extent.Compared with other tidal flats,the concentrations of Zn,Cd,Hg and As in sediments of the study area were at a relatively low level,those of Cu and Pb were at a moderate level;concentrations of TOC and TP were equivalent to those in the intertidal zone of Yangtze River;while that of TN was relatively low.The results of this study would supply some basic data for the ecological protection,environmental management and pollution controlling in Yellow River Delta." @default.
- W2355963833 created "2016-06-24" @default.
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- W2355963833 date "2011-01-01" @default.
- W2355963833 modified "2023-09-22" @default.
- W2355963833 title "Distribution characteristics of heavy metals and nutrient elements in inter-tidal surface sediments of Yellow River estuary" @default.
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