Effect of geochemical properties on degradation of trichloroethylene by stabilized zerovalent iron nanoparticle with Na-acrylic copolymer
Journal
Journal of Environmental Management
Journal Volume
144
Journal Volume
144
Pages
88-92
Start Page
88
End Page
92
ISSN
03014797
Date Issued
2014-11-01
Author(s)
Abstract
Stable nanoscale zero-valent iron (NZVI) particles have been developed to remediate chlorinated compounds. The degradation kinetics and efficiency of trichloroethylene (TCE) by a commercial stabilized NZVI with Na-acrylic copolymer (acNZVI) were investigated and compared with those by laboratory-synthesized NZVI and carboxymethyl cellulose (CMC)-stabilized NZVI particles. Results show that the degradation of TCE by acNZVI was faster than that by NZVI and CMC-NZVI. Increase in temperature enhanced the degradation rate and efficiency of TCE with acNZVI. The activation energy of TCE degradation by acNZVI was estimated to be 23kJ/mol. The degradation rate constants of TCE decreased from 0.064 to 0.026min-1 with decrease in initial pH from 9.03 to 4.23. Common groundwater anions including NO3-, Cl-, HCO3-, and SO42- inhibited slightly the degradation efficiencies of TCE by acNZVI. The Na-acrylic copolymer-stabilized NZVI, which exhibited high degradation kinetics and efficiency, could be a good remediation agent for chlorinated organic compounds.
Subjects
Anion
Nanoscale zero-valent iron (NZVI)
PH
Stabilized
Temperature
Trichloroethylene
SDGs
Publisher
Academic Press
Type
journal article