Combination of nanoscale-zero-valent iron and organic sub-strate stimulation for efficient remediation of co-mingled plume contaminated with Cr(VI) and chlorinated solvents

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F16%3A10395531" target="_blank" >RIV/00216208:11310/16:10395531 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.nbt.2016.06.747" target="_blank" >https://doi.org/10.1016/j.nbt.2016.06.747</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nbt.2016.06.747" target="_blank" >10.1016/j.nbt.2016.06.747</a>

Result language

angličtina

Original language name

Combination of nanoscale-zero-valent iron and organic sub-strate stimulation for efficient remediation of co-mingled plume contaminated with Cr(VI) and chlorinated solvents

Original language description

Chromium and chlorinated ethenes represent typical toxic pollutants that cause pollution of groundwater and soil due to their frequent industrial application. The present work reports results of 1-year pilot-remediation in-situ study dealing with a co-mingled plume containing the above-mentioned pollutants. The successful decontamination was achieved by the sequential use of nanoscale zerovalent iron (nZVI) particles and in situ biotic reduction supported by whey injection. The results revealed that nZVI was efficient toward Cr(VI) by itself and completely removed it from the groundwater (99%) and the subsequent application of whey resulted in a high removal of chlorinated ethenes (97-99%). The persistence of the reducing conditions after the depletion of the organic substrates indicated complementarity between nZVI and the whey phases. The subsequent application of whey phase assisted the microbial regeneration of the spent nZVI by promoting its reduction into Fe(II), which further supported remediation conditions at the site. Illumina sequencing and the detection of functional genes documented a development in the reducing microbes (iron-reducing, sulfate-reducing and chlororespiring bacteria) that benefited under the conditions of the site and that was probably responsible for the high dechlorination and/or Cr(VI) reduction. The results of this study demonstrate the feasibility and high efficiency of the combined nano-biotechnological approach for the removal of Cr(VI) and chlorinated ethenes from the groundwater.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

<a href="/en/project/7F14045" target="_blank" >7F14045: Utilization of long term (passive) sampling methods combined with in situ microcosms for assessment of (bio)degradation potential</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů