title: Effect of geochemical properties on degradation of trichloroethylene by stabilized zerovalent iron nanoparticle with Na-acrylic copolymer.
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 23 kJ/mol. The degradation rate constants of TCE decreased from 0.064 to 0.026 min(-1) with decrease in initial pH from 9.03 to 4.23. Common groundwater anions including NO3(-), Cl(-), HCO3(-), and SO4(2-) 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.
authors.affiliation: Department of Agricultural Chemistry, National Taiwan University, Taipei 106, Taiwan, ROC.
authors.forename: Meng-yi
authors.initials: MY
authors.lastname: Chen
authors.affiliation: Department of Agricultural Chemistry, National Taiwan University, Taipei 106, Taiwan, ROC. Electronic address: yuhfan.su@gmail.com.
authors.forename: Yuh-fan
authors.initials: YF
authors.lastname: Su
authors.affiliation: Department of Agricultural Chemistry, National Taiwan University, Taipei 106, Taiwan, ROC. Electronic address: yhs@ntu.edu.tw.
authors.forename: Yang-hsin
authors.initials: YH
authors.lastname: Shih
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D060587:Groundwater / Q000032:analysis*; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D053758:Nanoparticles / Q000737:chemistry*; D012964:Sodium / Q000737:chemistry*; D014241:Trichloroethylene / Q000737:chemistry*
chemical_list: D000180:Acrylic Resins; D014241:Trichloroethylene; D012964:Sodium; D007501:Iron
keywords: Anion; Nanoscale zero-valent iron (NZVI); Stabilized; Temperature; Trichloroethylene; pH