中国河流沉积物化学ppt课件

发布时间:2014-02-25

课件大小:2.10 MB

所属栏目:工程类

课件格式:.rar(压缩解压).ppt(使用格式)

课件等级:中国河流沉积物化学ppt课件推荐等级为3星

简略标题:中国河流沉积物化学

应用环境:应用于多媒体教学

制作使用软件:PowerPoint

应用阶段:环境

中国河流沉积物化学ppt课件介绍及下载


中国河流沉积物化学ppt课件内容预览:River sediments in China are poorly studied and documented.Results of studies are useful in understanding the baselines for contamination assessment and in giving insight into the fate of micro-pollutants in sediments.OBJECTIVESto provide basic values of element contents,geo-chemical substrates,surface properties,and trace metal association in the sediments;to study the regional variations of sediment characteristics and trace metal distributions;to analyze the relations between geo-chemical and surface properties of the sediments,and the relations between sediment characteristics and trace metal concentrations.中国东部11条河流流域自然条件特征Fig.1 Sediment sampling sitesThe representativeness of samplesThe coefficients of variation for the contents of most elements in the same river sediments from the Yangtze and Yellow were only less than 0.20(Li Yuanhui et al.and Qu et al.)The coefficients of variation for the contents of most elements in the Rhine in a 5year monitoring were less than 0.30(Martin et al.)The coefficients of variation for trace metals in river particles are little higher,but not exceeding one order of magnitude (Chen et al.).中国东部11条河流沉积物的元素组成中国与世界河流沉积物Ca,Al含量比较对不同研究者世界河流沉积物元素平均组成的比较中国东部河流颗粒物的粒径分布范围(n=44)ppt中国河流沉积物黏土矿物组成中国东部河流颗粒物中高龄石,蒙脱石与伊利石的相对含量中国东部河流颗粒物中铁,锰,铝,钛氧化物的含量中国东部河流颗粒物的pH值中国东部河流颗粒物腐殖质的含量和组成中国东部河流悬浮物和表层沉积物的TOC含量中国东部河流颗粒物腐殖质的组成中国东部11条河流颗粒物的比表面Fig.2 Cu, Zn, Pb and Cd concentrations and associations in sediments of 11major rivers in eastern China(I:exchangeable and carbonate-bound metals; II:metal bound to cryptocrystalline manganese oxides and reactive iron oxides; III:metal bound to amorphous iron oxides; IV:metal bound to organize and sulfides; V:metal in residual fraction)Fig.2 Cu, Zn, Pb and Cd concentrations and associations in sediments of 11major rivers in eastern China(I:exchangeable and carbonate-bound metals; II:metal bound to cryptocrystalline manganese oxides and reactive iron oxides; III:metal bound to amorphous iron oxides; IV:metal bound to organize and sulfides; V:metal in residual fraction)中国东部11条河流颗粒物的比表面中国东部河流颗粒物零盐效应点和永久电荷中国东部11条河流沉积物的表面酸度常数和表面位密度Surface charges in the
课件关键字:中国河流沉积物化学,沉积,物化,河流。
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