Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 369, Issue 1-3, Pages 232-239Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2010.08.031
Keywords
Iron nanoparticle; Poly(methyl methacrylate); Solvent-response; Trichloroethylene
Categories
Funding
- National Natural Science Foundation of China [20676121]
- Natural Science Foundation of Tianjin Province [09JCYBJC08000]
- Nankai University Basic Research Foundation for Youths and Returned Scholars [65010431]
- National Water Project [2008ZX07526-002, 2008ZX07314-001]
- NCET [08-0296]
- SRF for ROCS, SEM [2009-1001]
- Opening Foundation of Applied Chemistry Discipline, Zhejiang University of Technology [56310101630]
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For safe and effective targeted nanoparticles delivery in natural environments, we have presented a solvent-responsive polymer coated nanoscale zerovalent iron (PNZVI), which can be easily synthesized by the modified microemulsion method followed by a in situ surface-radical graft polymerization. The prepared PNZVI was used for the degradation of trichloroethylene (TCE). The factors controlling the reduction of TCE, such as pH, ionic strength, iron content as well as the initial TCE concentration were discussed. The experiment results demonstrated the ability of polymer to modify the Fe nanoparticles surface chemistry in a way that protected the Fe core from excessive oxidation by air, water and nontarget compounds. Most interestingly, the PNZVI can be miscible with TCE due to the stimuli response of outer polymer layer, which provided a possibility of nanoparticles delivery between immiscible water/oil phases. Furthermore, such responsive capability of polymer enhanced the selectivity of PNZVI to target contaminant TCE. (C) 2010 Elsevier B.V. All rights reserved.
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