Reductive dechlorination of trichloroethylene by polyvinylpyrrolidone stabilized nanoscale zerovalent iron particles with Ni
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- Title
- Reductive dechlorination of trichloroethylene by polyvinylpyrrolidone stabilized nanoscale zerovalent iron particles with Ni
- Authors
- Kumar, Macharla Arun; Bae, Sungjun; Hang, Seunghee; Chang, Yoonseok; Lee, Woojin
- Date Issued
- 2017-10
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- We developed a novel stabilized nanoscale zerovalent iron (NZVI) particles with Ni using an electron conducting polymer, polyvinylpyrrolidone (PVP), to selectively dechlorinate trichloroethylene (TCE) to non-toxic intermediates. The size of the PVP stabilized NZVI-Ni ((PVP-NZVI-Ni), average diameter: similar to 20nm) is smaller than that of bare NZVI (50-80nm) due to the prevention of agglomeration of the resultant iron particles by PVP. PVP-NZVI-Ni showed a complete removal of TCE in 1 h with superior dechlorination kinetics (k(obs) =5.702 h(-1)) and ethane selectivity (98%), while NZVI-Ni showed 5 times slower dechlorination kinetics (1.218 h(-1)). Other PVP-NZVI-metals (i.e., Cu, Sn, Co, and Mn) also enhanced the TCE dechlorination, but they were much slower (k(obs) =0.024-0.411 h(-1)) than that of PVP-NZVI-Ni. In column test, PVP-NZVI-Ni exhibited better mobility (95% of PVP-NZVI-Ni recovery in the eluent) than NZVI-Ni (1%). In addition, PVP-NZVI-Ni reductively transform TCE to ethane even under 10 cycles of repeated TCE dechlorination treatment. (C) 2017 Elsevier B.V. All rights reserved.
- Keywords
- BIMETALLIC NANOPARTICLES; NITRATE REDUCTION; CATALYST; HYDRODECHLORINATION; HYDROCARBONS; DEGRADATION; REACTIVITY; WATER; SIZE; FE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/50564
- DOI
- 10.1016/j.jhazmat.2017.07.030
- ISSN
- 0304-3894
- Article Type
- Article
- Citation
- JOURNAL OF HAZARDOUS MATERIALS, vol. 340, page. 399 - 406, 2017-10
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