Enhanced reduction of chlorophenols by nanoscale zerovalent iron supported on organobentonite
Li, Y; Zhang, Yun; Li, J; Sheng, G; Zheng, X
| HERO ID | 2128125 |
|---|---|
| In Press | No |
| Year | 2013 |
| Title | Enhanced reduction of chlorophenols by nanoscale zerovalent iron supported on organobentonite |
| Authors | Li, Y; Zhang, Yun; Li, J; Sheng, G; Zheng, X |
| Journal | Chemosphere |
| Volume | 92 |
| Issue | 4 |
| Page Numbers | 368-374 |
| Abstract | The reactivity of nanoscale zerovalent iron (NZVI) on removing chlorophenols (2-chlorophenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol and pentachlorophenol) was remarkably enhanced by using a hydrophobic support of organobentonite (CTMA-Bent), namely the bentonite modified with organic cetyltrimethylammonium (CTMA) cations. The complete dechlorination of chlorophenols and total conversion into phenol using this novel NZVI/CTMA-Bent combination was observed in batch experiments. The kinetic studies suggested that the reduction of chlorophenols by NZVI was accelerated due to the enhanced adsorption onto CTMA-Bent, which facilitated the mass transfer of chlorophenols from aqueous to iron surface. The enhanced reduction rate by NZVI/CTMA-Bent was positively related to the hydrophobicity of chlorophenols, and an increasing linear relationship was obtained between the relative enhancement on reaction rate constants (k(2)/k(1)) and logK(ow) values of chlorophenols. XPS results suggested there were fewer precipitates of ferric (hydro)xides formed on the surface of NZVI/CTMA-Bent, which may also lead to the improved reactivity and repetitive usability of NZVI/CTMA-Bent on removing chlorophenols. (c) 2013 Elsevier Ltd. All rights reserved. |
| Doi | 10.1016/j.chemosphere.2013.01.030 |
| Pmid | 23399303 |
| Wosid | WOS:000320212100005 |
| Url | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878115418&doi=10.1016%2fj.chemosphere.2013.01.030&partnerID=40&md5=c24d8a3feefb98237689e4c41815758a |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Keyword | Organobentonite; Nanoscale zerovalent iron; Chlorophenols; Reduction; Synergetic effect |