Geobacter sp. SD-1 with enhanced electrochemical activity in high-salt concentration solutions

Dan Sun, Douglas Call, Aijie Wang, Shaoan Cheng, Bruce E. Logan

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Summary: An isolate, designated strain SD-1, was obtained from a biofilm dominated by Geobacter sulfurreducens in a microbial fuel cell. The electrochemical activity of strain SD-1 was compared with type strains, G.sulfurreducensPCA and Geobacter metallireducensGS-15, and a mixed culture in microbial electrolysis cells. SD-1 produced a maximum current density of 290±29Am-3 in a high-concentration phosphate buffer solution (PBS-H, 200mM). This current density was significantly higher than that produced by the mixed culture (189±44Am-3) or the type strains (<70Am-3). In a highly saline water (SW; 50mM PBS and 650mM NaCl), current by SD-1 (158±4Am-3) was reduced by 28% compared with 50mM PBS (220±4Am-3), but it was still higher than that of the mixed culture (147±19Am-3), and strains PCA and GS-15 did not produce any current. Electrochemical tests showed that the improved performance of SD-1 was due to its lower charge transfer resistance and more negative potentials produced at higher current densities. These results show that the electrochemical activity of SD-1 was significantly different than other Geobacter strains and mixed cultures in terms of its salt tolerance.

Original languageEnglish (US)
Pages (from-to)723-729
Number of pages7
JournalEnvironmental Microbiology Reports
Volume6
Issue number6
DOIs
StatePublished - Dec 1 2014

Fingerprint

Geobacter
salt concentration
Salts
mixed culture
salt
density current
Bioelectric Energy Sources
Electrolysis
Salt-Tolerance
Passive Cutaneous Anaphylaxis
Biofilms
Buffers
Geobacter sulfurreducens
fuel cell
Phosphates
microbial fuel cells
biofilm
electrokinesis
tolerance
phosphate

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Agricultural and Biological Sciences (miscellaneous)

Cite this

Sun, Dan ; Call, Douglas ; Wang, Aijie ; Cheng, Shaoan ; Logan, Bruce E. / Geobacter sp. SD-1 with enhanced electrochemical activity in high-salt concentration solutions. In: Environmental Microbiology Reports. 2014 ; Vol. 6, No. 6. pp. 723-729.
@article{0f070a34e8094d62971413c19213313e,
title = "Geobacter sp. SD-1 with enhanced electrochemical activity in high-salt concentration solutions",
abstract = "Summary: An isolate, designated strain SD-1, was obtained from a biofilm dominated by Geobacter sulfurreducens in a microbial fuel cell. The electrochemical activity of strain SD-1 was compared with type strains, G.sulfurreducensPCA and Geobacter metallireducensGS-15, and a mixed culture in microbial electrolysis cells. SD-1 produced a maximum current density of 290±29Am-3 in a high-concentration phosphate buffer solution (PBS-H, 200mM). This current density was significantly higher than that produced by the mixed culture (189±44Am-3) or the type strains (<70Am-3). In a highly saline water (SW; 50mM PBS and 650mM NaCl), current by SD-1 (158±4Am-3) was reduced by 28{\%} compared with 50mM PBS (220±4Am-3), but it was still higher than that of the mixed culture (147±19Am-3), and strains PCA and GS-15 did not produce any current. Electrochemical tests showed that the improved performance of SD-1 was due to its lower charge transfer resistance and more negative potentials produced at higher current densities. These results show that the electrochemical activity of SD-1 was significantly different than other Geobacter strains and mixed cultures in terms of its salt tolerance.",
author = "Dan Sun and Douglas Call and Aijie Wang and Shaoan Cheng and Logan, {Bruce E.}",
year = "2014",
month = "12",
day = "1",
doi = "10.1111/1758-2229.12193",
language = "English (US)",
volume = "6",
pages = "723--729",
journal = "Environmental Microbiology Reports",
issn = "1758-2229",
publisher = "Wiley-Blackwell",
number = "6",

}

Geobacter sp. SD-1 with enhanced electrochemical activity in high-salt concentration solutions. / Sun, Dan; Call, Douglas; Wang, Aijie; Cheng, Shaoan; Logan, Bruce E.

In: Environmental Microbiology Reports, Vol. 6, No. 6, 01.12.2014, p. 723-729.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Geobacter sp. SD-1 with enhanced electrochemical activity in high-salt concentration solutions

AU - Sun, Dan

AU - Call, Douglas

AU - Wang, Aijie

AU - Cheng, Shaoan

AU - Logan, Bruce E.

PY - 2014/12/1

Y1 - 2014/12/1

N2 - Summary: An isolate, designated strain SD-1, was obtained from a biofilm dominated by Geobacter sulfurreducens in a microbial fuel cell. The electrochemical activity of strain SD-1 was compared with type strains, G.sulfurreducensPCA and Geobacter metallireducensGS-15, and a mixed culture in microbial electrolysis cells. SD-1 produced a maximum current density of 290±29Am-3 in a high-concentration phosphate buffer solution (PBS-H, 200mM). This current density was significantly higher than that produced by the mixed culture (189±44Am-3) or the type strains (<70Am-3). In a highly saline water (SW; 50mM PBS and 650mM NaCl), current by SD-1 (158±4Am-3) was reduced by 28% compared with 50mM PBS (220±4Am-3), but it was still higher than that of the mixed culture (147±19Am-3), and strains PCA and GS-15 did not produce any current. Electrochemical tests showed that the improved performance of SD-1 was due to its lower charge transfer resistance and more negative potentials produced at higher current densities. These results show that the electrochemical activity of SD-1 was significantly different than other Geobacter strains and mixed cultures in terms of its salt tolerance.

AB - Summary: An isolate, designated strain SD-1, was obtained from a biofilm dominated by Geobacter sulfurreducens in a microbial fuel cell. The electrochemical activity of strain SD-1 was compared with type strains, G.sulfurreducensPCA and Geobacter metallireducensGS-15, and a mixed culture in microbial electrolysis cells. SD-1 produced a maximum current density of 290±29Am-3 in a high-concentration phosphate buffer solution (PBS-H, 200mM). This current density was significantly higher than that produced by the mixed culture (189±44Am-3) or the type strains (<70Am-3). In a highly saline water (SW; 50mM PBS and 650mM NaCl), current by SD-1 (158±4Am-3) was reduced by 28% compared with 50mM PBS (220±4Am-3), but it was still higher than that of the mixed culture (147±19Am-3), and strains PCA and GS-15 did not produce any current. Electrochemical tests showed that the improved performance of SD-1 was due to its lower charge transfer resistance and more negative potentials produced at higher current densities. These results show that the electrochemical activity of SD-1 was significantly different than other Geobacter strains and mixed cultures in terms of its salt tolerance.

UR - http://www.scopus.com/inward/record.url?scp=84913594885&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84913594885&partnerID=8YFLogxK

U2 - 10.1111/1758-2229.12193

DO - 10.1111/1758-2229.12193

M3 - Article

C2 - 25756125

AN - SCOPUS:84913594885

VL - 6

SP - 723

EP - 729

JO - Environmental Microbiology Reports

JF - Environmental Microbiology Reports

SN - 1758-2229

IS - 6

ER -