Journal of East China Normal University(Natural Sc ›› 2010, Vol. 2010 ›› Issue (2): 34-42.
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LI Dan,DENG Bing,ZHANG Guosen,ZHANG Yingying
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Abstract: The geochemistry of major ions(Ca2+,Mg2+,Na+,K+,HCO32-,SO42-,Cl-,NO3-和SiO32-)in the Yangtze River was studied, based on the monthly monitoring data at Xuliujing station for the period of 2004-2008 and the investigation result of the Yangtze River in September 2008. The study found that the concentration of main ions varies clearly in different seasons, with a negative correlation with the discharge of the River. But the difference of the concentration is less clearly than that of the discharge. There is a persistently increasing in the concentrations of K+, Na+, Ca2+, Mg2+, Cl-, NO3-, SO42-and the ratio of hardness/alkalinity; especially the concentration of SO42-and the ratio of hardness/alkalinity have a more obvious increasing trend. In contrast, the concentration of SiO32-and HCO3-show a decreasing trend. The changes of major ions mainly result from the environment acidification, the pollution emissions by human, the cyclic salt from sea, the preserved effect by reservoirs establishments etc.
Key words: chemical weathering, the Three Gorges Project, cyclic salt, industrial pollution, the Yangtze River, chemical weathering, the Three Gorges Project, cyclic salt, industrial pollution
LI Dan;DENG Bing;ZHANG Guosen;ZHANG Yingying. Change characteristics of major ions and their influence factors in Yangtze Estuary in recent years[J]. Journal of East China Normal University(Natural Sc, 2010, 2010(2): 34-42.
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