Sorption of Arsenic from Drinking Water to Mg(OH)2, Sorrel's Cements, and Zirconium Doped Materials.

Moore, R. C. ; Holt, K. ; Zhao, H. ; Salas, F. ; Hasan, A. ; Lucero, D.

Technical Information Center Oak Ridge Tennessee

关键词: Arsenic;    Drinking water;    Doped materials;    Cements;    Activated carbon;   

RP-ID  :  DE2003807054

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

It was discovered that MgO or Mg(OH)(sub 2) when it reacts with water is a very strong sorbent for arsenic. Distribution constants, or K(sub d) values, are as high as 1 x 10(sup 6) L/mole. In this work, Mg(OH)(sub 2) and other compounds have been investigated as sorbents for arsenic and other contaminants. This work has resulted in several major accomplishments including: (1) design, construction, and testing of a pressure sand filter to remove Mg(OH)(sub 2) after it has sorbed arsenic from water, (2) stabilization of Mg(OH)(sub 2) as a Sorrel's cement against reaction with carbonate that results in MgCO(sub 3) formation decreasing the efficiency of Mg(OH)(sub 2) to sorb arsenic, and (3) the development of a new, very promising sorbent for arsenic based on zirconium. Zirconium is an environmentally benign material found in many common products such as toothpaste. It is currently used in water treatment and is very inexpensive. In this work, zirconium has been bonded to activated carbon, zeolites, sand and montmorillonite.