AN XPS AND SEM/EDS CHARACTERIZATION OF LEACHING EFFECTS ON LEAD-DOPED AND ZINC-DOPED PORTLAND-CEMENT

被引：50

作者：

COCKE, DL ^{[1
]}

MOLLAH, MYA ^{[1
]}

PARGA, JR ^{[1
]}

HESS, TR ^{[1
]}

ORTEGO, JD ^{[1
]}

机构：

[1] UNIV DHAKA,DEPT CHEM,DHAKA,BANGLADESH

来源：

JOURNAL OF HAZARDOUS MATERIALS | 1992年 / 30卷 / 01期

关键词：

D O I：

10.1016/0304-3894(92)87076-R

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The characterization of leaching effects on portland cement doped with lead and zinc has been carried out by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS). Evidence is presented from XPS and SEM/EDS results that the dopant metal ions are preferentially adsorbed on the surface of the cementitious materials. Leaching tests reveal that most of the Zn2+ ions and some of the Pb2+ ions are dissolved. A chemical shift with respect to the Si (2p) XPS peak occurs due to the increased polymerization of the silicates present in cement. The distribution of the cations before and after leaching is discussed in relation to the XPS and SEM/EDS results.

引用

页码：83 / 95

页数：13

共 26 条

[1] HYDRATION OF PORTLAND-CEMENT FOLLOWED BY SI-29 SOLID-STATE NMR-SPECTROSCOPY [J].