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Microbial reduction of nitrate in the presence of nanoscale zero-valent iron.
Chemosphere. 2008 May; 72(2):257-62.C

Abstract

Microbial reduction of nitrate in the presence of nanoscale zero-valent iron (NZVI) was evaluated to assess the feasibility of employing NZVI in the biological nitrate treatment. Nitrate was completely reduced within 3d in a nanoscale Fe(0)-cell reactor, while only 50% of the nitrate was abiotically reduced over 7d at 25 degrees C. The removal rate of nitrate in the integrated NZVI-cell system was unaffected by the presence of high amounts of sulfate. Efficient removal of nitrate by Fe(II)-supported anaerobic culture in 14 d indicated that Fe(II), which is produced during anaerobic iron corrosion in the Fe(0)-cell system, might act as an electron donor for nitrate. Unlike abiotic reduction, microbial reduction of nitrate was not significantly affected by low temperature conditions. This study demonstrated the potential applicability of employing NZVI iron as a source of electrons for biological nitrate reduction. Use of NZVI for microbial nitrate reduction can obviate the disadvantages associated with traditional biological denitrification, that relies on the use of organic substrates or explosive hydrogen gas, and maintain the advantages offered by nano-particle technology such as higher surface reactivity and functionality in suspensions.

Authors+Show Affiliations

Department of Civil and Environmental Engineering, University of Delaware, Newark, DE 19716, USA. khshin@kei.re.krNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

18331753

Citation

Shin, Kyung-Hee, and Daniel K. Cha. "Microbial Reduction of Nitrate in the Presence of Nanoscale Zero-valent Iron." Chemosphere, vol. 72, no. 2, 2008, pp. 257-62.
Shin KH, Cha DK. Microbial reduction of nitrate in the presence of nanoscale zero-valent iron. Chemosphere. 2008;72(2):257-62.
Shin, K. H., & Cha, D. K. (2008). Microbial reduction of nitrate in the presence of nanoscale zero-valent iron. Chemosphere, 72(2), 257-62. https://doi.org/10.1016/j.chemosphere.2008.01.043
Shin KH, Cha DK. Microbial Reduction of Nitrate in the Presence of Nanoscale Zero-valent Iron. Chemosphere. 2008;72(2):257-62. PubMed PMID: 18331753.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Microbial reduction of nitrate in the presence of nanoscale zero-valent iron. AU - Shin,Kyung-Hee, AU - Cha,Daniel K, Y1 - 2008/03/10/ PY - 2007/05/31/received PY - 2008/01/22/revised PY - 2008/01/22/accepted PY - 2008/3/12/pubmed PY - 2008/9/23/medline PY - 2008/3/12/entrez SP - 257 EP - 62 JF - Chemosphere JO - Chemosphere VL - 72 IS - 2 N2 - Microbial reduction of nitrate in the presence of nanoscale zero-valent iron (NZVI) was evaluated to assess the feasibility of employing NZVI in the biological nitrate treatment. Nitrate was completely reduced within 3d in a nanoscale Fe(0)-cell reactor, while only 50% of the nitrate was abiotically reduced over 7d at 25 degrees C. The removal rate of nitrate in the integrated NZVI-cell system was unaffected by the presence of high amounts of sulfate. Efficient removal of nitrate by Fe(II)-supported anaerobic culture in 14 d indicated that Fe(II), which is produced during anaerobic iron corrosion in the Fe(0)-cell system, might act as an electron donor for nitrate. Unlike abiotic reduction, microbial reduction of nitrate was not significantly affected by low temperature conditions. This study demonstrated the potential applicability of employing NZVI iron as a source of electrons for biological nitrate reduction. Use of NZVI for microbial nitrate reduction can obviate the disadvantages associated with traditional biological denitrification, that relies on the use of organic substrates or explosive hydrogen gas, and maintain the advantages offered by nano-particle technology such as higher surface reactivity and functionality in suspensions. SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/18331753/Microbial_reduction_of_nitrate_in_the_presence_of_nanoscale_zero_valent_iron_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(08)00111-2 DB - PRIME DP - Unbound Medicine ER -