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Elemental Composition of River Particulates in the Eastern China

CHEN Jingsheng;WANG Feiyue;CHENG Chengqi;CHEN Jianglin;SONG Jijie (Department of Geography,Peking University,Beijing,100871)  
A total of 42 aquatic particulate samples (suspended matter and 63μmsurficial sediments) was collected from 11 large rivers in the eastern China.Theserivers include,from north to south,the Amur,Nenjiang,Songhua,Ussuri,Tu-men,Yalu,Liaohe,Luanhe,Yellow,Huaihe,Yangtze,Qiantang,Minjiang,andPearl rivers.Contents of both major elements (Al,Si,Ca,Mg,K,Na,Ti,Fe,Mn) and trace elements (Cu,Pb,Zn,Cd,Cr,Co,Ni,V)in the paniculate sam-ples were analysed.Based on the data set,to which were added literature data forthe Yellow,Yangtze and Pearl rivers,the geographic variations of river particulatecompositions in the eastern China were studied.The results showed that the Yel-low River particulates contained a notably high content of Ca and low content ofAl.Except for the Yellow River,Al contents in particulates increased from the northern rivers to the southern rivers,while K and Na decreased.Trace elementswere relatively enriched in the southern river particulates.The geographic varia-tions were suggested to be related to the weathering types and geological back-ground within the river basins.The average composition of river particulates inChina was then estimated.Based on the Chinese river data from this paper,as wellas on the literature data for other main world rivers,a new estimation of the globalaverage particulate composition was reported.Since the earlier estimations on theliterature were not concerned with or only concerned with few of the Chinese riverswhich contribute a great proportion to the global load of river particulates,this newestimation may be more reasonable.
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