A mechanistic analysis of the influence of iron-oxidizing bacteria on antimony (V) removal from water by microscale zero-valent iron

Yongchao Li, Jixin Wu, Bozhi Ren, Andrew Hursthouse

Research output: Contribution to journalArticle

Abstract

BACKGROUND
Microscale zero-valent iron (mZVI) is an efficient material for removing heavy metals from water, and iron-oxidizing bacteria are the primary microorganisms responsible for iron corrosion. We investigated the effects of Sphaerotilus natans on antimony [Sb(V)] removal by mZVI using batch experiments.

RESULTS
At an initial Fe0 dose of 0.1g·L-1, 40 mg·L-1 Sb(V) was almost completely removed in an abiotic system. Although Sphaerotilus natans exhibited significant tolerance to Sb(V), its ability to adsorb Sb(V) was poor. Most importantly, the presence of Sphaerotilus natans reduced the removal rate of aqueous Sb(V) by mZVI by up to 39%. The value of the redox potential in the biologically mediated system was lower than that in the abiotic control, indicating oxygen consumption by Sphaerotilus natans. In the presence of Sphaerotilus natans, the main reaction products were FeOOH and FeSb2O6, compared to Fe2O3 in the abiotic system. Biomineralization of Fe3+ ions by Sphaerotilus natans may have occurred during the experiment, but it did not play a significant role in Sb(V) removal.

CONCLUSION
mZVI can be efficiently used to remove Sb(V) from water. However, the presence of Sphaerotilus natans may inhibit its removal ability, likely due to the decreased mass transfer and lower corrosion of iron.
LanguageEnglish
Pages2527-2534
JournalJournal of Chemical Technology and Biotechnology
Volume93
Early online date9 Feb 2018
DOIs
StateE-pub ahead of print - 9 Feb 2018

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antimony
Antimony
Bacteria
Iron
iron
bacterium
Water
water
corrosion
Corrosion
Biomineralization
biomineralization
redox potential
analysis
removal
oxygen consumption
Reaction products
Microorganisms
Heavy metals
mass transfer

Keywords

  • Antimony
  • microscale zero-valent iron
  • iron-oxidising bacterial
  • bioinhibitory effect

Cite this

@article{c33639a2b80e42bea2c0fa653621bdc2,
title = "A mechanistic analysis of the influence of iron-oxidizing bacteria on antimony (V) removal from water by microscale zero-valent iron",
abstract = "BACKGROUNDMicroscale zero-valent iron (mZVI) is an efficient material for removing heavy metals from water, and iron-oxidizing bacteria are the primary microorganisms responsible for iron corrosion. We investigated the effects of Sphaerotilus natans on antimony [Sb(V)] removal by mZVI using batch experiments.RESULTSAt an initial Fe0 dose of 0.1g·L-1, 40 mg·L-1 Sb(V) was almost completely removed in an abiotic system. Although Sphaerotilus natans exhibited significant tolerance to Sb(V), its ability to adsorb Sb(V) was poor. Most importantly, the presence of Sphaerotilus natans reduced the removal rate of aqueous Sb(V) by mZVI by up to 39\{%}. The value of the redox potential in the biologically mediated system was lower than that in the abiotic control, indicating oxygen consumption by Sphaerotilus natans. In the presence of Sphaerotilus natans, the main reaction products were FeOOH and FeSb2O6, compared to Fe2O3 in the abiotic system. Biomineralization of Fe3+ ions by Sphaerotilus natans may have occurred during the experiment, but it did not play a significant role in Sb(V) removal.CONCLUSIONmZVI can be efficiently used to remove Sb(V) from water. However, the presence of Sphaerotilus natans may inhibit its removal ability, likely due to the decreased mass transfer and lower corrosion of iron.",
keywords = "Antimony, microscale zero-valent iron, iron-oxidising bacterial, bioinhibitory effect",
author = "Yongchao Li and Jixin Wu and Bozhi Ren and Andrew Hursthouse",
year = "2018",
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day = "9",
doi = "10.1002/jctb.5606",
language = "English",
volume = "93",
pages = "2527--2534",
journal = "Journal of Chemical Technology and Biotechnology",
issn = "0268-2575",
publisher = "Wiley",

}

TY - JOUR

T1 - A mechanistic analysis of the influence of iron-oxidizing bacteria on antimony (V) removal from water by microscale zero-valent iron

AU - Li,Yongchao

AU - Wu,Jixin

AU - Ren,Bozhi

AU - Hursthouse,Andrew

PY - 2018/2/9

Y1 - 2018/2/9

N2 - BACKGROUNDMicroscale zero-valent iron (mZVI) is an efficient material for removing heavy metals from water, and iron-oxidizing bacteria are the primary microorganisms responsible for iron corrosion. We investigated the effects of Sphaerotilus natans on antimony [Sb(V)] removal by mZVI using batch experiments.RESULTSAt an initial Fe0 dose of 0.1g·L-1, 40 mg·L-1 Sb(V) was almost completely removed in an abiotic system. Although Sphaerotilus natans exhibited significant tolerance to Sb(V), its ability to adsorb Sb(V) was poor. Most importantly, the presence of Sphaerotilus natans reduced the removal rate of aqueous Sb(V) by mZVI by up to 39%. The value of the redox potential in the biologically mediated system was lower than that in the abiotic control, indicating oxygen consumption by Sphaerotilus natans. In the presence of Sphaerotilus natans, the main reaction products were FeOOH and FeSb2O6, compared to Fe2O3 in the abiotic system. Biomineralization of Fe3+ ions by Sphaerotilus natans may have occurred during the experiment, but it did not play a significant role in Sb(V) removal.CONCLUSIONmZVI can be efficiently used to remove Sb(V) from water. However, the presence of Sphaerotilus natans may inhibit its removal ability, likely due to the decreased mass transfer and lower corrosion of iron.

AB - BACKGROUNDMicroscale zero-valent iron (mZVI) is an efficient material for removing heavy metals from water, and iron-oxidizing bacteria are the primary microorganisms responsible for iron corrosion. We investigated the effects of Sphaerotilus natans on antimony [Sb(V)] removal by mZVI using batch experiments.RESULTSAt an initial Fe0 dose of 0.1g·L-1, 40 mg·L-1 Sb(V) was almost completely removed in an abiotic system. Although Sphaerotilus natans exhibited significant tolerance to Sb(V), its ability to adsorb Sb(V) was poor. Most importantly, the presence of Sphaerotilus natans reduced the removal rate of aqueous Sb(V) by mZVI by up to 39%. The value of the redox potential in the biologically mediated system was lower than that in the abiotic control, indicating oxygen consumption by Sphaerotilus natans. In the presence of Sphaerotilus natans, the main reaction products were FeOOH and FeSb2O6, compared to Fe2O3 in the abiotic system. Biomineralization of Fe3+ ions by Sphaerotilus natans may have occurred during the experiment, but it did not play a significant role in Sb(V) removal.CONCLUSIONmZVI can be efficiently used to remove Sb(V) from water. However, the presence of Sphaerotilus natans may inhibit its removal ability, likely due to the decreased mass transfer and lower corrosion of iron.

KW - Antimony

KW - microscale zero-valent iron

KW - iron-oxidising bacterial

KW - bioinhibitory effect

U2 - 10.1002/jctb.5606

DO - 10.1002/jctb.5606

M3 - Article

VL - 93

SP - 2527

EP - 2534

JO - Journal of Chemical Technology and Biotechnology

T2 - Journal of Chemical Technology and Biotechnology

JF - Journal of Chemical Technology and Biotechnology

SN - 0268-2575

ER -