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Zero-valent iron particles for PCB degradation and an evaluation of their effects on bacteria,plants, and soil organisms |
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| Authors: | ?evc? Alena El-Temsah Yehia S Filip Jan Joner Erik J Bob?íková Kate?ina ?erník Miroslav |
| Institution: | 1.Institute for Nanomaterials, Advanced Technologies and Innovations, Technical University of Liberec, Studentská 2, 46117, Liberec, Czech Republic ;2.Norwegian Institute for Bioecomomy Research, Environment and Climate Department, H?gskoleveien 7, 1430, ?s, Norway ;3.Gen?k - Centre for Biosafety, Postboks 6418, 9294, Troms?, Norway ;4.Regional Centre of Advanced Technologies and Materials, Palacky University, ?lechtitel? 27, 78371, Olomouc, Czech Republic ; |
| Abstract: | 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 (mZVI) were compared for PCB degradation efficiency in water and soil. In addition, the ecotoxicity of nZVI-B and nZVI-T particles in treated water and soil was evaluated on bacteria, plants, earthworms, and ostracods. All types of nZVI and mZVI were highly efficient in degradation of PCBs in water, but had little degradation effect on PCBs in soil. Although nZVI-B had a significant negative impact on the organisms tested, treatment with nZVI-T showed no negative effect, probably due to surface passivation through controlled oxidation of the nanoparticles. |
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