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논문 기본 정보

자료유형
학술저널
저자정보
Lee, Nara (Department of Civil and Environmental Engineering, Korea Advanced Institute for Science and Technology) Choi, Kyunghoon (Department of Civil and Environmental Engineering, Korea Advanced Institute for Science and Technology) Uthuppu, Basil (Department of Micro- and Nanotechnology, Technical University of Denmark) Jakobsen, Mogens H. (Department of Micro- and Nanotechnology, Technical University of Denmark) Hwang, Yuhoon (Department of Environmental Engineering, Technical University of Denmark) Broholm, Mette M. (Department of Environmental Engineering, Technical University of Denmark) Lee, Woojin (Department of Civil and Environmental Engineering, Korea Advanced Institute for Science and Technology)
저널정보
테크노프레스 Advances in environmental research Advances in environmental research 제3권 제2호
발행연도
2014.1
수록면
107 - 116 (10page)

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This study aimed to synthesize dispersed and reactive nanoscale zero-valent iron (nZVI) with poly(1-vinylpyrrolidone-co-vinyl acetate) (PVP/VA), nontoxic and biodegradable stabilizer. The nZVI used for the experiments was prepared by reduction of ferric solution in the presence of PVP/VA with specific weight ratios to iron contents. Colloidal stability was investigated based on the rate of sedimentation, hydrodynamic radius and zeta potential measurement. The characteristic time, which demonstrated dispersivity of particles resisting aggregation, increased from 21.2 min (bare nZVI) to 97.8 min with increasing amount of PVP/VA (the ratios of 2). For the most stable nZVI coated by PVP/VA, its reactivity was examined by nitrate reduction in a closed batch system. The pseudo-first-order kinetic rate constants for the nitrate reduction by the nanoparticles with PVP/VA ratios of 0 and 2 were 0.1633 and $0.1395min^{-1}$ respectively. A nitrogen mass balance, established by quantitative analysis of aqueous nitrogen species, showed that the addition of PVP/VA to nZVI can change the reduction capacity of the nanoparticles.

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