Competition by aquifer materials in a bimetallic nanoparticle/persulfate system for the treatment of trichloroethylene.
It has been suggested in the literature that aquifer materials can compete with the target organic compounds in an activated peroxygen system. In this study, we employed a rapid treatment method using persulfate activated with bimetallic nanoparticles to investigate the competition between aquifer materials and the dissolved phase of a target organic compound. The concentration of dissolved trichloroethylene (TCE) remaining after using the activated persulfate system was two- to three-fold higher in a soil slurry batch system than in an aqueous batch system. For all five aquifer materials investigated, an increase in the mass of the aquifer solids significantly decreased the degradation of TCE. A linear relationship was observed between the mass of aquifer materials and the initial TCE degradation rate, suggesting that the organic carbon and/or aquifer material constituents (e.g., carbonates and bicarbonates) compete with the oxidation of TCE.
Department of Civil & Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada. mass414@hotmail.com.
Mohammed Ahmad
MA
Al-Shamsi
Neil R
NR
Thomson
D002244:Carbon / Q000737:chemistry; D002254:Carbonates / Q000737:chemistry; D052918:Environmental Restoration and Remediation / Q000379:methods; D060587:Groundwater / Q000737:chemistry*; D006812:Humic Substances / Q000032:analysis; D006841:Hydrocarbons, Aromatic / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D012995:Solubility; D013431:Sulfates / Q000737:chemistry*; D014241:Trichloroethylene / Q000302:isolation & purification*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
D002254:Carbonates; D006812:Humic Substances; D006841:Hydrocarbons, Aromatic; D013431:Sulfates; D014874:Water Pollutants, Chemical; D014241:Trichloroethylene; D002244:Carbon