价铁在土壤及地下水污染整治之应用

1、 (Zero-valent iron, ZVI (Nanoscale Zero- valent iron, NZVI (Permeable reactive barrier, PRB 1. ( ( (Transformation (Immobilization 2. (Nanometer nm 1 nm 10-9 1100 nm (RNIP 4060 nm 2002 ( 1. (Plume ( 1 ( 2 3 (Preliminary site assessment (Site characterization (Treatability testing 1 ( USEPA 1998 2 (

2、USEPA 2001 3( Arun R. Gavaskar 1999 ( 0.5% (CaSO4 (MgCO3 25 30 (12 (Funnel-and-gate 4 4 ( USEPA 19982. (Lehigh University D. Elliot 2001 (In situ pilot test 5 5 ( 939 (1Fe(H2O 63+ + 3BH4- + 3H2O Æ Fe0 + 3 B(OH3 + 10.5 H2Fe 2+ + N2H 4 + 4 OH- Æ Fe0 + N2 + 4 H2O(2 H 2 101,000 (Slurry (Hot sp

3、ot 1100 nm 101,000 (Delivery vehicle ( 20 pH (Rh 1. (The Remediation Technologies Development Forum, RTDF /public/permbarr/prbsumms/default.cfm 60 2. 2002 CVOC 14,000 g/L( 30 ( 10-3 cm/sec 5 g/L Research Triangle Park (Pilot-scale test (Chlorinated volatile organic compound RCRA 43

4、 1 3 7 5 125 63 22 1 1,600 (gpm 90% 1.9 g/L 2 0.6 CVOC ( 2.8 g/L 99% 14,000 g/L 10 1. 2. 15 3. 3 93 9 94 3 23 10 92 10 25 84 4. 91 10 5. 8 91 6.USEPA, Technology News and Trend, Issue No. 17, March 2005. 7.USEPA, A Citizens Guide to Permeable Reactive Barriers, April 2001. 8.Arun R. Gavaskar, Design and Construction Techniques for Permeable Reactive Barriers, Journal of Hazardous Materials, 68, 1999. 9.USEPA, Permeable Reactive Barrier Technologies for Containment Remediation, September 1998. 10.The Remediation Technologies D