Abstract

Employing a special anaerobic membrane biofilm batch reactor (MBBR), we demonstrated antimonate (Sb(V)) reduction using methane (CH4) as the sole electron donor. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Raman and photoluminescence (PL) spectra identified that Sb2O3 microcrystals were the main reduced products. The Sb(V) reduction rate increased continually over the 111-day experiment, which supports the enrichment of the microorganisms responsible for Sb(V) reduction to Sb(III). Copy numbers of the mcrA gene and archaeal and bacterial 16 S rRNA genes increased in parallel. Clone library and Illumina sequencing of 16S rRNA gene demonstrated that Methanosarcina became the dominant archaea in the biofilm, suggesting that Methanosarcina might play an important role in Sb(V) reduction in the CH4-based MBBR.

Original languageEnglish (US)
Pages (from-to)8693-8700
Number of pages8
JournalEnvironmental Science and Technology
Volume52
Issue number15
DOIs
StatePublished - Aug 7 2018

Fingerprint

Methane
Batch reactors
Biofilms
biofilm
methane
membrane
Membranes
oxidation
Oxidation
Genes
X-ray spectroscopy
gene
Microcrystals
Microorganisms
Energy dispersive spectroscopy
clone
Photoluminescence
X ray photoelectron spectroscopy
microorganism
scanning electron microscopy

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Bioreduction of Antimonate by Anaerobic Methane Oxidation in a Membrane Biofilm Batch Reactor. / Lai, Chun Yu; Dong, Qiu Yi; Rittmann, Bruce; Zhao, He Ping.

In: Environmental Science and Technology, Vol. 52, No. 15, 07.08.2018, p. 8693-8700.

Research output: Contribution to journalArticle

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N2 - Employing a special anaerobic membrane biofilm batch reactor (MBBR), we demonstrated antimonate (Sb(V)) reduction using methane (CH4) as the sole electron donor. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Raman and photoluminescence (PL) spectra identified that Sb2O3 microcrystals were the main reduced products. The Sb(V) reduction rate increased continually over the 111-day experiment, which supports the enrichment of the microorganisms responsible for Sb(V) reduction to Sb(III). Copy numbers of the mcrA gene and archaeal and bacterial 16 S rRNA genes increased in parallel. Clone library and Illumina sequencing of 16S rRNA gene demonstrated that Methanosarcina became the dominant archaea in the biofilm, suggesting that Methanosarcina might play an important role in Sb(V) reduction in the CH4-based MBBR.

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