珠穆朗玛峰绒布河源区河水化学特征_刘腊山.pdfVIP

2000 9 ENVIRONMENTA L SCIENCE Sep. , 2000 , , ( , 730000, - : @ 163. ) E m ail li lashan net : , 117 , PE-2380 2+ + , Dionex-100 . : ¹ HCO , SO -Ca . : Ca K 3 4 + 2+ 2- - - 2+ 2+ 2- + + , . º , , Na M g SO4 Cl NO3 Ca Mg SO4 K Na . » , , , . : ; ; ; : X142: A: 0250-3301( 2000) 05-0059-05 Chemical Characteristics at the Head of Rongbuk River on Mt Everest. , , ( Laboratory of Ice Core and Cold Regions Environment, Lanzho Insti- Li Lashan Ren Jiaw en Qin Dahe t te of Glaciology and Geocryology , Chinese Academy of Sciences, Lanzho 730000, China E-mail: li lashan @ 163. net) Abstract: In order to st dy the wat er chemical characteristics at the head of Rongb k River, t he samples w ere collected from J ne to October in 1998. T he cation concentration w ere analyzed by PE-2380 atomic absorption spectrophot ometer and t he anion concentrations by Dionex-100 ion chromatograph. The res lt s indicated: ¹ T he - 2- 2+ , . anion and cation in streamw ater were dominat ed by HCO3 SO4 and Ca respectively According to the ionic , : 2+ + + 2+ , 2- - - . º concent rations t he order of major ions w as Ca K Na Mg SO4 Cl NO3 The high positive 2+ 2+ 2- + + correlation existed among Ca M g SO4 , so did K Na .The major ions in st reamw ater came from mineral- . » , ization of bedrock or local glacial deposits D ring the w hole s mmer the major ionic mean concent rations cor- related positively w ith the mean discharge of the river w ater in