张龙军,温志超

• 1:中国海洋大学海洋环境与生态教育部重点实验室

摘要(Abstract)：

根据2007年6月和7月采集的黄河干流及部分支流水样和河床砂样品数据,对黄河流域硅酸盐化学风化进行了探讨。在充分评估黄河流域的K+,Na+来源的基础上,确定了硅酸盐风化的K+量,并通过选定的硅酸盐风化(K/Na)比值,得到了硅酸盐风化的Na+量;通过测定流域内不同岩石类型分布的河床砂样品,得到河床砂样品硅酸盐部分(Ca/Na)和(Mg/K)的比值,确定了钙镁硅酸盐风化的Ca2+,Mg2+量;并据此估算了流域硅酸盐化学风化的CO2消耗率。如果选用黄河入海多年径流量58.02×109km3/a进行计算,则得到全流域硅酸盐风化CO2消耗率约为26.22×103mol/km2/a。若选用2007年的平均径流量24.83×109km3/a进行计算,则黄河流域硅酸盐风化引起的CO2消耗率约为11.19×103mol/km2/a。

关键词(KeyWords)： 黄河;离子浓度;河床砂;硅酸盐化学风化;CO2消耗率

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划项目(2002CB412501);; 国家自然科学基金资助项目(40476063)资助

作者(Author): 张龙军,温志超

DOI: 10.16441/j.cnki.hdxb.2009.05.030

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