Sulfur and oxygen isotope tracing in zero valent iron based In situ remediation system for metal contaminants.

In the present study, controlled laboratory column experiments were conducted to understand the biogeochemical changes during the microbial sulfate reduction. Sulfur and oxygen isotopes of sulfate were followed during sulfate reduction in zero valent iron incubated flow through columns at a constant temperature of 20±1°C for 90 d. Sulfur isotope signatures show considerable variation during biological sulfate reduction in our columns in comparison to abiotic columns where no changes were observed. The magnitude of the enrichment in δ(34)S values ranged from 9.4‰ to 10.3‰ compared to initial value of 2.3‰, having total fractionation δS between biotic and abiotic columns as much as 6.1‰. Sulfur isotope fractionation was directly proportional to the sulfate reduction rates in the columns. Oxygen isotopes in this experiment seem less sensitive to microbial activities and more likely to be influenced by isotopic exchange with ambient water. A linear relationship is observed between δ(34)S and δ(18)O in biotic conditions and we also highlight a good relationship between δ(34)S and sulfate reduction rate in biotic columns.

[1]  P. Fritz,et al.  Oxygen isotope exchange between sulphate and water during bacterial reduction of sulphate , 1989 .

[2]  M. Böttcher,et al.  SULFATE REDUCTION AND RELATED STABLE ISOTOPE ( 34 S , 18 O ) VARIATIONS IN INTERSTITIAL WATERS FROM THE EASTERN MEDITERRANEAN , 1998 .

[3]  N. Aristov,et al.  Heterogeneous reductive dehalogenation of PCB contaminated transformer oil and brominated diphenyl ethers with zero valent iron. , 2012, Chemosphere.

[4]  H. Richnow,et al.  Hydrochemical and isotopic effects associated with petroleum fuel biodegradation pathways in a chalk aquifer. , 2005, Journal of contaminant hydrology.

[5]  K. Knöller,et al.  Sulfur and oxygen isotope fractionation during benzene, toluene, ethyl benzene, and xylene degradation by sulfate-reducing bacteria. , 2006, Environmental science & technology.

[6]  M. Jekel,et al.  Removal of dissolved metals by zero-valent iron (ZVI): kinetics, equilibria, processes and implications for stormwater runoff treatment. , 2005, Water research.

[7]  Klas Lackschewitz,et al.  Proceedings of the Ocean Drilling Program , 2002 .

[8]  Dirk Springael,et al.  Impact of microbial activities on the mineralogy and performance of column-scale permeable reactive iron barriers operated under two different redox conditions. , 2007, Environmental science & technology.

[9]  O. R. West,et al.  Predicting the Precipitation of Mineral Phases in Permeable Reactive Barriers , 2003 .

[10]  K. Jørgensen.  In situ bioremediation. , 2007, Advances in applied microbiology.

[11]  R. Puls,et al.  In situ remediation of arsenic in simulated groundwater using zerovalent iron: laboratory column tests on combined effects of phosphate and silicate. , 2003, Environmental science & technology.

[12]  M. Schroth,et al.  A model for oxygen and sulfur isotope fractionation in sulfate during bacterial sulfate reduction processes , 2005 .

[13]  R. Rowland.  Sulfate-Reducing Bacteria in the Zero Valent Iron Permeable Reactive Barrier at Fry Canyon, Utah , 2003 .

[14]  Feng Ying,et al.  Bioaugmented sulfate reduction using enriched anaerobic microflora in the presence of zero valent iron. , 2008, Chemosphere.

[15]  Jizhong Zhou,et al.  Microbiological Characteristics in a Zero-Valent Iron Reactive Barrier , 2002, Environmental Monitoring & Assessment.

[16]  K. Vanbroekhoven,et al.  Stability investigations of zinc and cobalt precipitates immobilized by in situ bioprecipitation (ISBP) process. , 2010, Journal of hazardous materials.

[17]  M. Böttcher,et al.  29. SULFATE REDUCTION AND RELATED STABLE ISOTOPE ( 34 S, 18 O) VARIATIONS IN INTERSTITIAL WATERS FROM THE EASTERN MEDITERRANEAN 1 , 1998 .

[18]  D. Blowes,et al.  Geochemistry of a Permeable Reactive Barrier for Metals and Acid Mine Drainage , 1999 .

[19]  R. Wilkin,et al.  High-level Arsenite Removal from Groundwater by Zero-valent Iron , 2022 .

[20]  A. G. Harrison,et al.  Mechanism of the bacterial reduction of sulphate from isotope fractionation studies , 1958 .

[21]  D. Burghardt,et al.  Development of a reactive zone technology for simultaneous in situ immobilisation of radium and uranium , 2005 .

[22]  R. Zbořil,et al.  Zero-valent iron nanoparticles in treatment of acid mine water from in situ uranium leaching. , 2011, Chemosphere.

[23]  J. Kuever,et al.  Diversity of Sulfur Isotope Fractionations by Sulfate-Reducing Prokaryotes , 2001, Applied and Environmental Microbiology.

[24]  N. Nikolaidis,et al.  Arsenic removal by zero-valent iron: field, laboratory and modeling studies. , 2003, Water research.

[25]  R. Dong,et al.  Sulfur transformations in pilot-scale constructed wetland treating high sulfate-containing contaminated groundwater: a stable isotope assessment. , 2011, Water research.

[26]  D. Blowes,et al.  Treatment of mine drainage using permeable reactive barrers: column experiments. , 2002, Environmental science & technology.

[27]  Reyes Sierra-Alvarez,et al.  Zero valent iron as an electron-donor for methanogenesis and sulfate reduction in anaerobic sludge. , 2005, Biotechnology and bioengineering.

[28]  L. Bastiaens,et al.  Ten year performance evaluation of a field-scale zero-valent iron permeable reactive barrier installed to remediate trichloroethene contaminated groundwater. , 2010, Environmental science & technology.

[29]  H. Thode,et al.  The mechanism of the bacterial reduction of sulphate and of sulphite from isotope fractionation studies , 1968 .

[30]  R. Wilkin,et al.  Laboratory evaluation of zero-valent iron to treat water impacted by acid mine drainage. , 2003, Chemosphere.

[31]  D. Voutsa,et al.  Arsenite removal from waters by zero valent iron: batch and column tests. , 2010, Chemosphere.

[32]  R. O. Johnson,et al.  Mineral Precipitation Upgradient from a Zero‐Valent Iron Permeable Reactive Barrier , 2008 .

[33]  S. Rittenberg,et al.  MICROBIOLOGICAL FRACTIONATION OF SULPHUR ISOTOPES. , 1964, Journal of general microbiology.

[34]  Ruey-an Doong,et al.  Effect of metal ions and humic acid on the dechlorination of tetrachloroethylene by zerovalent iron. , 2006, Chemosphere.

[35]  P. Cappellen,et al.  34S/32S fractionation by sulfate-reducing microbial communities in estuarine sediments , 2011 .

[36]  D. Naftz.  Handbook of groundwater remediation using permeable reactive barriers : applications to radionuclides, trace metals, and nutrients , 2002 .

[37]  H. Roche,et al.  Can we use stable isotopes for ecotoxicological studies? Effect of DDT on isotopic fractionation in Perca fluviatilis. , 2009, Chemosphere.

[38]  D. Springael,et al.  Combined removal of chlorinated ethenes and heavy metals by zerovalent iron in batch and continuous flow column systems. , 2005, Environmental Science and Technology.

[39]  Isotopic fractionation during reductive dechlorination of trichloroethene by zero-valent iron: influence of surface treatment. , 2002, Chemosphere.

[40]  D. Canfield,et al.  The reactivity of sedimentary iron minerals toward sulfide , 1992 .

[41]  Qing X. Li,et al.  Reduction of nitroaromatic pesticides with zero-valent iron. , 2004, Chemosphere.

[42]  R. Nogueira,et al.  Zero valent iron mediated degradation of the pharmaceutical diazepam. , 2012, Chemosphere.

[43]  C. Larroche,et al.  In situ bioremediation of monoaromatic pollutants in groundwater: a review. , 2008, Bioresource technology.

[44]  L. Liang,et al.  Reductive precipitation of uranium(VI) by zero-valent iron , 1998 .