Preparation of Cellulose Acetate Supported Zero-Valent Iron Nanoparticles for the Dechlorination of Trichloroethylene in Water

Chlorinated hydrocarbons are an immense concern for human health and the environment because they␣are highly toxic and are present in many contaminated sites. Zero-valent iron has been shown to be very effective for the dechlorination of chlorinated olefins and paraffins. This behavior is enhanced when the particle size is in the nanometer range. The activity of these nanoparticles is very high, and thus supporting the particles is important to preserve their chemical nature by inhibiting oxidation until they can be contacted with the chlorinated stream. In this paper, we present the preparation of membrane (cellulose acetate) supported zero-valent iron nanoparticles. The highly active nanoparticles were synthesized in a water-oil micro-emulsion, mixed with cellulose acetate-acetone solution, and then formed into a porous membrane by phase inversion. The unsupported iron particles and membrane supported iron particles were characterized using transmission electron microscopy. Batch experiments were conducted to characterize the activity of the supported zero-valent iron nanoparticles to dechlorinate trichloroethylene in water, as well as to investigate synergistic effects of the polymer support matrix.

[1]  M. Pileni,et al.  NANOMETER METALLIC COPPER PARTICLE SYNTHESIS IN REVERSE MICELLES , 1993 .

[2]  N. Pumford,et al.  Environmental contaminant and disinfection by-product trichloroacetaldehyde stimulates T cells in vitro. , 2004, International immunopharmacology.

[3]  Robert W. Gillham,et al.  Dechlorination of Trichloroethene in Aqueous Solution Using Fe0 , 1996 .

[4]  Timothy L. Johnson,et al.  Degradation of carbon tetrachloride by iron metal: Complexation effects on the oxide surface , 1998 .

[5]  S. Haram,et al.  Some aspects of the role of surfactants in the formation of nanoparticles , 1998 .

[6]  T. Mallouk,et al.  Ferragels: A new family of materials for remediation of aqueous metal ion solutions , 1999 .

[7]  T. Mallouk,et al.  Remediation of Cr(VI) and Pb(II) aqueous solutions using supported, nanoscale zero-valent iron , 2000 .

[8]  D. Burris,et al.  Sorption of trichloroethylene and tetrachloroethylene in a batch reactive metallic iron-water system. , 1995, Environmental science & technology.

[9]  S. Ganguli,et al.  Surface oxidation of iron nanoparticles , 2001 .

[10]  Cumaraswamy Vipulanandan,et al.  Microemulsion and solution approaches to nanoparticle iron production for degradation of trichloroethylene , 2003 .

[11]  Wei-xian Zhang,et al.  Synthesizing Nanoscale Iron Particles for Rapid and Complete Dechlorination of TCE and PCBs , 1997 .

[12]  J. Nuckols,et al.  Neurobehavioral effects of exposure to trichloroethylene through a municipal water supply. , 2003, Environmental research.

[13]  Hsing-Lung Lien,et al.  Treatment of chlorinated organic contaminants with nanoscale bimetallic particles , 1998 .

[14]  Thomas E. Mallouk,et al.  Hydrodechlorination of Trichloroethylene to Hydrocarbons Using Bimetallic Nickel-Iron Nanoparticles , 2002 .

[15]  Everett E. Carpenter,et al.  Iron nanoparticles as potential magnetic carriers , 2001 .

[16]  N. Ruiz,et al.  Ultrasound pretreatment of elemental iron: kinetic studies of dehalogenation reaction enhancement and surface effects. , 2002, Water research.

[17]  C. H. Bartholomew,et al.  The synthesis and characterization of iron colloid catalysts in inverse micelle solutions , 1997 .

[18]  J. Gotpagar,et al.  Reductive dehalogenation of trichloroethylene using zero-valent iron , 1997 .

[19]  J. Schnoor,et al.  Reductive dechlorination of carbon tetrachloride with elemental iron , 1995 .