Performance of Three Reactive Materials for Treating Groundwater Contaminated by Heavy Metal Ions within PRB
Three permeable reactive barrier (PRB) columns, filled with zero valent iron, cast iron granule and mixture of cast iron granule and granular activated carbon as the primary media, were designed to treat the groundwater polluted with heavy metals Pb(Ⅱ), Cr(Ⅵ), Cd(Ⅱ), As(III,V), Mn and Fe in simulating underground conditions. All of these kinds of media were compounded with quartz grit in the same proportion. Operation was under the effective porosity changing from 60％ to 65％ and hydraulic retention time varying from 14 to 16.8h. The results indicated that removal efficiency of Pb(Ⅱ), Cr(Ⅵ), Cd(Ⅱ) and As were more than 98％ in three columns, while 98％,89％and 66％ in columns of total Mn, and 82％, 76％, 84％ respectively of Fe since steady operation. The metal removal mechanisms and the effects of pH, redox potential were discussed and compared for the three columns.
permeable reactive barrier groundwater remediation cast iron granule removal mechanism
DU Lianzhu ZHANG Lanying LIU Na FANG Fang
College of Environment and Resources, Jilin University, Changchun 130026, Jilin, China
国际会议
2007环境科学与技术国际会议(The 2007 International Symposium on Environmental Science and Technology)
北京
英文
2007-11-13（万方平台首次上网日期，不代表论文的发表时间）