Phyto/rhizoremediation studies using long-term PCB-contaminated soil |
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Authors: | Martina Mackova Petra Prouzova Petr Stursa Edita Ryslava Ondrej Uhlik Katarina Beranova Jan Rezek Veronika Kurzawova Katerina Demnerova Tomas Macek |
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Institution: | (1) Faculty of Food and Biochemical Technology, ICT Prague, Technicka 3, 166 28 Prague, Czech Republic;(2) Joint Laboratory of IOCB and ICT, Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic |
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Abstract: | Purpose Polychlorinated biphenyls (PCBs) represent a large group of recalcitrant environmental pollutants, differing in the number
of chlorine atoms bound to biphenyl ring. Due to their excellent technological properties, PCBs were used as heat-transfer
media, for filling transformers and condensers, as paint additives, etc. With increasing knowledge of their toxicity, transfer
to food chains and accumulation in living organisms, their production ended in most countries in the 1970s and in 1984 in
the former Czechoslovakia. But even a quarter of century after the PCB production ceased, from contaminated areas, the volatile
PCBs evaporate and contaminate much larger areas even at very distant parts of the world. For this reason, PCBs still represent
a global problem. The main method of PCB removal from contaminated environment is at present the expensive incineration at
high temperatures. With the aim of finding effective alternative approaches, we are studying biological methods for PCB removal
from the environment. In this paper, we summarise 10 years of studies using long-term PCB-contaminated soil from a dumpsite
in South Bohemia, targeted for the use of plants (phytoremediation) and their cooperation with microorganisms in the root
zone (rhizoremediation). |
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