Turgut C, Pepe M, Teresa J C. The effect of EDTA and citric acid on phytoremediation of Cd, Cr, and Ni from soil using Helianthus[J]. Environ Pollut,2004, 131: 147- 154.
[2]
Cheng S.Heavy metal pollution in China: origin, pattern and control [J].Environ Sci Pollut Res,2003,10: 192- 198.
[3]
Robert M P,Robert W P,Sharon K H,et al.Coupled iron corrosion and chromate reduction : mechanisms for subsurface remediation[J]. Environ Sci Technol, 1995, 29: 1913- 1922.
[4]
Blowes D W,Ptacek C J,Jambor J L.In- situ remediation of chromate contaminated groundwater using permeable reactive walls[J].Environ Sci Technol,1997,31: 3348- 3357.
[5]
Puls R W,Paul C J,Powell R M. The application of in situpermeable reactive (zero- valent iron) barrier technologyfor the remediation of chromate- contaminated groundwater : a field test[J].Appl Geochem, 1999, 14: 989- 1000.
[6]
Alowitz M J, Scherer M M. Kinetics of nitrate, nitrite, and Cr(Ⅵ ) re-duction by iron metal[J].Environ Sci Technol,2002,36:299- 306.
[7]
Westerhoff P, James J.Nitrate removal in zero- valent iron packed columns[J].Water Res, 2003 ,37: 1818- 1830.
[8]
Benner S G,Blowes D W,Ptacek C J,et al.Rates of sulfate reduction and metal sulfide precipitation in a permeable reactive barrier[J].Appl Geochem,2002,17:301- 320.
[9]
Mayer U. A numerical model for multicomponent reactive transport in variably saturated porous media[D].Ph.D.Thesis,Dept. of Earth Sci-ences, University of Waterloo, Waterloo, Ontario, Canada.
[10]
Rodenas L A, Iglesias A M, Weisz A D, et al. Surface Complexation Description of the Dissolution of Chromium(III) Hydrous Oxides by Ox-alic Acid[J].Inorg Chem,1997,36:6423- 6430.