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Statements

Subject Item
n2:RIV%2F46747885%3A24620%2F14%3A%230000539%21RIV15-TA0-24620___
rdf:type
skos:Concept n16:Vysledek
rdfs:seeAlso
http://www.sciencedirect.com/
dcterms:description
Because of its high toxicity and mobility, hexavalent chromium is considered to be a high priority pollutant. This study was performed to carry out a pilot-scale in-situ remediation test in the saturated zone of a historically Cr(VI)-contaminated site using commercially available nanoscale zero-valent iron (nZVI). The site was monitored before and after the nZVI application by means of microbial cultivation tests, phospholipid fatty acid analysis (PLFA) and toxicological tests with Vibrio fischeri. Injection of nZVI resulted in a rapid decrease in the Cr(VI) and total Cr concentrations in the groundwater without any substantial effect on its chemical properties. The ecotoxicological test with V. fischeri did not indicate any negative changes in the toxicity of the groundwater following the application of nZVI and no significant changes were observed in cultivable psychrophilic bacteria densities and PLFA concentrations in the groundwater samples during the course of the remediation test However, PLFA of soil samples revealed that the application of nZVI significantly stimulated the growth of Gram-positive bacteria. Principle component analysis (PCA) was applied to the PLFA results for the soil samples from the site in order to explain how Cr(VI) reduction and the presence of Fe influence the indigenous populations. The PCA results clearly indicated a negative correlation between the Cr concentrations and the biota before the application of nZVI and a significant positive correlation between bacteria and the concentration of Fe after the application of nZVI. Because of its high toxicity and mobility, hexavalent chromium is considered to be a high priority pollutant. This study was performed to carry out a pilot-scale in-situ remediation test in the saturated zone of a historically Cr(VI)-contaminated site using commercially available nanoscale zero-valent iron (nZVI). The site was monitored before and after the nZVI application by means of microbial cultivation tests, phospholipid fatty acid analysis (PLFA) and toxicological tests with Vibrio fischeri. Injection of nZVI resulted in a rapid decrease in the Cr(VI) and total Cr concentrations in the groundwater without any substantial effect on its chemical properties. The ecotoxicological test with V. fischeri did not indicate any negative changes in the toxicity of the groundwater following the application of nZVI and no significant changes were observed in cultivable psychrophilic bacteria densities and PLFA concentrations in the groundwater samples during the course of the remediation test However, PLFA of soil samples revealed that the application of nZVI significantly stimulated the growth of Gram-positive bacteria. Principle component analysis (PCA) was applied to the PLFA results for the soil samples from the site in order to explain how Cr(VI) reduction and the presence of Fe influence the indigenous populations. The PCA results clearly indicated a negative correlation between the Cr concentrations and the biota before the application of nZVI and a significant positive correlation between bacteria and the concentration of Fe after the application of nZVI.
dcterms:title
Nanoscale Zero-valent Iron Application for in Situ Reduction of Hexavalent Chromium and Its Effects on Indigenous Microorganism Populations Nanoscale Zero-valent Iron Application for in Situ Reduction of Hexavalent Chromium and Its Effects on Indigenous Microorganism Populations
skos:prefLabel
Nanoscale Zero-valent Iron Application for in Situ Reduction of Hexavalent Chromium and Its Effects on Indigenous Microorganism Populations Nanoscale Zero-valent Iron Application for in Situ Reduction of Hexavalent Chromium and Its Effects on Indigenous Microorganism Populations
skos:notation
RIV/46747885:24620/14:#0000539!RIV15-TA0-24620___
n5:aktivita
n6:P n6:I
n5:aktivity
I, P(TA01021792), P(TE01020218)
n5:cisloPeriodika
485
n5:dodaniDat
n12:2015
n5:domaciTvurceVysledku
n19:2486407
n5:druhVysledku
n7:J
n5:duvernostUdaju
n10:S
n5:entitaPredkladatele
n17:predkladatel
n5:idSjednocenehoVysledku
31525
n5:idVysledku
RIV/46747885:24620/14:#0000539
n5:jazykVysledku
n13:eng
n5:klicovaSlova
REMEDIATION; REMOVAL; SOIL; NANOPARTICLES; GROUNDWATER; IMPACT
n5:klicoveSlovo
n8:REMEDIATION n8:SOIL n8:REMOVAL n8:GROUNDWATER n8:NANOPARTICLES n8:IMPACT
n5:kodStatuVydavatele
NL - Nizozemsko
n5:kontrolniKodProRIV
[432E9A2BFC2A]
n5:nazevZdroje
Science of The Total Environment
n5:obor
n18:DJ
n5:pocetDomacichTvurcuVysledku
1
n5:pocetTvurcuVysledku
3
n5:projekt
n14:TA01021792 n14:TE01020218
n5:rokUplatneniVysledku
n12:2014
n5:svazekPeriodika
2014
n5:tvurceVysledku
Cajthaml, Tomáš Němeček, Jan Lhotský, Ondřej
n5:wos
000337259000077
s:issn
0048-9697
s:numberOfPages
9
n15:organizacniJednotka
24620