Reactive barrier treatment wall technology for remediation of inorganic contaminated groundwater.

Taylor, T.

Technical Information Center Oak Ridge Tennessee

关键词: Water pollution;    Contamination;    Ground water;    Ammonium chlorides;    Apatites;   

RP-ID  :  DE2001776190

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The potential for subsurface reactive barrier wall technology to aid in remediation of contaminated groundwater in situ has prompted testing of novel porous media. Treatability testing of contaminants contacted with various media has been conducted using equilibrium batch techniques, one-dimensional (1-D) columns and 2-D boxes. Continuous mode column and box experiments are useful for assessing critical design parameters under dynamic flow conditions. Experiments have been conducted using a multi-layer barrier treatment approach to immobilize a suite of contaminants. For example, basalt coated with a cationic polymer (poly diallyl dimethyl ammonium chloride (Catfloc(reg-sign))) was used to agglomerate colloids, Apatite II(reg-sign) sorbed aqueous phase metals and radionuclides including (sup 85,87)Sr and (sup 235)U and facilitated reduction of nitrate and perchlorate, crushed pecan shells sorbed aqueous phase metals and served as a secondary medium for reduction of nitrate and perchlorate concentrations, and finally limestone raised the pH of exiting pore waters close to natural levels.