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ZERO-VALENT IRON PARTICLES FOR PCB DEGRADATION AND AN EVALUATION OF THEIR EFFECTS ON BACTERIA, PLANTS, AND SOIL ORGANISMS
Sevcu, A., Y.S. El-Temsah, J. Filip, E.J. Joner, K. Bobcikova, and M. Cernik.
Environmental Science and Pollution Research 24(26):21191-21202(2017)

Two types of nano-scale zero-valent iron—NZVI-B prepared by borohydride reduction and NZVI-T produced by thermal reduction of iron oxide nanoparticles in H2—and a micro-scale ZVI were compared for PCB degradation efficiency in water and soil. All the types of ZVI were highly efficient in degrading PCBs in water but had little degradation effect on PCBs in soil. Although contact with NZVI-B had a significant negative impact on exposed bacteria, plants, earthworms, and ostracods, treatment with NZVI-T showed no negative effect, likely due to surface passivation through controlled oxidation of the nanoparticles.



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