Degradation of perchloroethylene in cosolvent solutions by zero-valent iron

被引:76
作者
Clark, CJ [1 ]
Rao, PSC
Annable, MD
机构
[1] Univ Florida, Dept Civil Engn, Inter Disciplinary Program Hydrolog Sci, Gainesville, FL 32611 USA
[2] Purdue Univ, Dept Civil Engn, W Lafayette, IN 47907 USA
[3] Univ Florida, Dept Environm Engn Sci, Gainesville, FL 32611 USA
关键词
zero-valent iron; PCE; cosolvents; adsorption; dechlorination;
D O I
10.1016/S0304-3894(02)00162-0
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Remediation of sites contaminated by chlorinated organic compounds is a significant priority in the environmental field. Subsequently, the addition of cosolvent solutions for in situ flushing of contaminated source zones has been successfully field tested. However, the treatment of effluent fluids in such cleanup efforts is an often overlooked component of this technology implementation. The purpose of this research was to evaluate the effectiveness of zero-valent iron (Fe-0) in treating perchloroethylene (PCE) in an aqueous solution, and how the presence of a cosolvent (ethanol) and modification of the iron surface altered dechlorination. The modified iron surfaces included in this study were nickel-plated iron, acid-treated iron, and untreated iron surfaces. PCE dechlorination in the presence of each of the iron surfaces displayed pseudo first-order kinetics. The highest degradation rate of PCE occurred on the nickel-plated iron surface, 5.83 x 10(-3) h(-1), followed by the acid-treated iron, 4.92 x 10(-3) h(-1), and the untreated iron, 3.34 x 10(-3) h(-1). Dechlorination on each of the surfaces decreased with increasing cosolvent fractions. It was shown that as cosolvent fractions increased, PCE adsorption decreased and resulted in a concomitant decrease in PCE degradation rates. (C) 2002 Elsevier Science B.V All rights reserved.
引用
收藏
页码:65 / 78
页数:14
相关论文
共 48 条
[1]   Reduction of nitro aromatic compounds by zero-valent iron metal [J].
Agrawal, A ;
Tratnyek, PG .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1996, 30 (01) :153-160
[2]   Synergistic effect of cationic surfactants on perchloroethylene degradation by zero-valent iron [J].
Alessi, DS ;
Li, ZH .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2001, 35 (18) :3713-3717
[3]   Pathways and kinetics of chlorinated ethylene and chlorinated acetylene reaction with Fe(O) particles [J].
Arnold, WA ;
Roberts, AL .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2000, 34 (09) :1794-1805
[4]   Pathways of chlorinated ethylene and chlorinated acetylene reaction with Zn(0) [J].
Arnold, WA ;
Roberts, AL .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1998, 32 (19) :3017-3025
[5]   REMEDIATION OF CONTAMINATED SOILS BY SOLVENT FLUSHING [J].
AUGUSTIJN, DCM ;
JESSUP, RE ;
RAO, PSC ;
WOOD, AL .
JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE, 1994, 120 (01) :42-57
[6]  
BOULDING JR, 1996, EPA ENV ENG SOURCEBO, P317
[7]   Reductive dechlorination of tetrachloroethylene and trichloroethylene catalyzed by vitamin B-12 in homogeneous and heterogeneous systems [J].
Burris, DR ;
Delcomyn, CA ;
Smith, MH ;
Roberts, AL .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1996, 30 (10) :3047-3052
[8]   SORPTION OF TRICHLOROETHYLENE AND TETRACHLOROETHYLENE IN A BATCH REACTIVE METALLIC IRON-WATER SYSTEM [J].
BURRIS, DR ;
CAMPBELL, TJ ;
MANORANJAN, VS .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1995, 29 (11) :2850-2855
[9]  
BUTLER BJ, 1996, DENSE CHLORINATED SO
[10]   Decontamination of TCE- and U-rich waters by granular iron: Role of sorbed Fe(II) [J].
Charlet, L ;
Liger, E ;
Gerasimo, P .
JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE, 1998, 124 (01) :25-30