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Dissimilatory iron and sulfate reduction by native microbial communities using lactate and citrate as carbon sources and electron donors.

Abstract：

:The bacterial (dissimilatory) iron and sulfate reduction (BIR and BSR) are intimately linked to the biogeochemical cycling of C, Fe, and S in acid mine drainage (AMD) environments. This study examined the response of native microbial communities to the reduction of iron and sulfate in bench experimental systems. Results showed that the reduction of ferric iron and sulfate took place when the electron acceptors coexist. Existence of Fe(III) can postpone the reduction of sulfate, but can enhance the reduction rate. Cultures grown in the presence of 10 mM iron can reach the final level of sulfate bio-reduction rate (~100%) after 35 days incubation. 16 S rDNA -based microbial community analysis revealed that the three genera Anaeromusa, Acinetobacter and Bacteroides were dominated in the ferric-reducing conditions. SRB (Desulfobulbus, Desulfosporosinus and Desulfovibrio) were dominated in the sulfate reduction process. Results in this study highlighted the highly coupled nature of C, Fe, and S biogeochemical cycles in AMD and provided insights into the potential of environmental remediation by native microbial.

journal_name

Ecotoxicol Environ Saf

journal_title

Ecotoxicology and environmental safety

authors

Xia D,Yi X,Lu Y,Huang W,Xie Y,Ye H,Dang Z,Tao X,Li L,Lu G

doi

10.1016/j.ecoenv.2019.03.005

subject

Has Abstract

pub_date

2019-06-15 00:00:00

pages

524-531

eissn

0147-6513

issn

1090-2414

pii

S0147-6513(19)30266-0

journal_volume

174

pub_type

杂志文章

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