Impact of Shewanella oneidensis on heavy metals remobilization under reductive conditions in soil of Guilan Province, Iran

Ghorbanzadeh, Nasrin; Kumar, Rahul; Lee, Sang-Hun; Park, Hyunsung; Jeon, Byong‐Hun

doi:10.1007/s12303-017-0067-8

“…Release of REEs in experimental samples could potentially be influenced by AQDS which may act as an electron shuttle for S. oneidensis and has been shown to increase iron reduction rates. 26,40 AQDS is also known to chelate iron and some REEs, and could thus potentially cause the release of REEs from the coal matrix in control samples. [41][42][43][44][45] However, the efficiency of AQDS is very low and does not account for the higher REEs extractions observed in the experimental samples.…”

Section: Biorecovery Of Rees Using S Oneidensismentioning

confidence: 99%

“…[23][24][25] In the recent times, reductive dissolution of metals by Shewanella oneidensis through extracellular electron transport (EET) system has been utilized for enhanced biorecovery of different metals including Cr, Mn, Fe, Cu, Pd, and Zn. [26][27][28][29] The reduction of metals can be achieved by accepting electrons from several electron donors including lactate, pyruvate, acetate, and formate. [30][31][32] Total amount of coal mined in a year throughout the world can provide a long-lasting and alternative source of REEs.…”

Section: Introductionmentioning

confidence: 99%

Bio-weathering Using Shewanella oneidensis MR-1 Enhances Selective Recovery of Rare Earth Elements from Alaskan Coal Mines

Sachan

¹

,

Dev

²

,

Briggs

³

et al. 2022

Preprint

0

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Coal mines in Alaska with high rare earth elements (REEs) levels (286-524 mg/kg) serve as an alternative domestic source for REEs. Existing leaching/separation technologies fail to selectively recover REEs from the feedstock and require downstream multiple purification stages that increase the overall operational cost. This study aims at bio-weathering coal from two Alaskan coal mines (Wishbone Hill and Healy) at three density fractions (1.3 float, and 1.3 and 1.5 sink) using Shewanella oneidensis MR-1 for achieving higher selective REEs recovery in one-step process. Optimizing the bio-weathering process by varying solids percentages (5.7 to14.3% w/v), particle size (-14 to -200 M), incubation temperatures (30 to 34 °C), and inoculum dosing (0.2 to 1% v/v) resulted in highest recovery of Neodymium (75.3%) and total REEs (98.4%) from 1.3 float Wishbone Hill and 1.3 sink Healy coal, respectively. When compared to the chemical leaching process, bio-weathering enhanced selective recovery of REEs including Scandium, Yttrium, Ytterbium, Terbium, Erbium, and Lutetium from Healy coal at low density, and Yttrium from Wishbone Hill coal at high density. The results indicate the future scope for developing cost-effective selective REEs recovery processes that may address the global critical minerals supply chain risk.

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“…The release of REEs in experimental samples could potentially be influenced by AQDS which may act as an electron shuttle for S. oneidensis and has been shown to increase iron reduction rates. 26,40 AQDS is also known to chelate iron and some REEs, and could thus potentially cause the release of REEs from the coal matrix in control samples. [41][42][43][44][45] However, the efficiency of AQDS is very low and does not account for the higher REEs extractions observed in the experimental samples.…”

Section: Biorecovery Of Rees Using S Oneidensismentioning

confidence: 99%

Bio-weathering Using Shewanella oneidensis MR-1 Enhances Selective Recovery of Rare Earth Elements from Alaskan Coal Mines

Sachan

¹

,

Dev

²

,

Briggs

³

et al. 2022

Preprint

0

View full text Add to dashboard Cite

Coal mines in Alaska with high rare earth elements (REEs) levels (286-524 mg/kg) serve as an alternative domestic source for REEs. Existing leaching/separation technologies fail to selectively recover REEs from the feedstock and require downstream multiple purification stages that increase the overall operational cost. This study aims at bio-weathering coal from two Alaskan coal mines (Wishbone Hill and Healy) at three density fractions (1.3 float, and 1.3 and 1.5 sink) using Shewanella oneidensis MR-1 for achieving higher selective REEs recovery in one-step process. Optimizing the bio-weathering process by varying solids percentages (5.7 to14.3% w/v), particle size (-14 to -200 M), incubation temperatures (30 to 34 °C), and inoculum dosing (0.2 to 1% v/v) resulted in highest recovery of Neodymium (75.3%) and total REEs (98.4%) from 1.3 float Wishbone Hill and 1.3 sink Healy coal, respectively. When compared to the chemical leaching process, bio-weathering enhanced selective recovery of REEs including Scandium, Yttrium, Ytterbium, Terbium, Erbium, and Lutetium from Healy coal at low density, and Yttrium from Wishbone Hill coal at high density. The results indicate the future scope for developing cost-effective selective REEs recovery processes that may address the global critical minerals supply chain risk.

show abstract

“…Shewanella oneidensis is a facultative anaerobe that is well-known for its ability to reductively dissolve metals at circumneutral pH through the extracellular electron transport (EET) system and has been utilized for enhanced biorecovery of different metals including Cr, Mn, Fe, Cu, Pd, and Zn. − While the exact mechanism is unknown, S. oneidensis has also been shown to bioweather clay minerals through successive cycling between oxic and anoxic conditions .…”

Section: Introductionmentioning

confidence: 99%

Bioweathering Using Shewanella oneidensis MR-1 Enhances Recovery of Rare Earth Elements from Alaskan Coal Mines

Sachan,

Dev,

Ghosh

et al. 2023

ACS EST Eng.

1

0

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Alaskan coal mines with high rare earth element (REE) levels (286–524 mg/kg) serve as an alternative domestic REE source. Existing leaching/separation technologies require hazardous chemicals to recover REEs from the feedstock with multiple downstream purification stages, increasing the overall operational cost. This study aims at bioweathering coal from two Alaskan coal mines (Wishbone Hill and Healy) at three specific gravity fractions (1.3 float and 1.3 and 1.5 sink) using Shewanella oneidensis MR-1 for achieving REE recovery. Optimizing the bioweathering process by varying the solids percentages (5.7 to 14.3% w/v), particle size (74 to 1180 μm), incubation temperatures (30 to 34 °C), and inoculum dosing (0.2 to 1% v/v) resulted in the highest recovery of neodymium (75.3%) and total REEs (98.4%) from 1.3 float Wishbone Hill and 1.3 sink Healy coal, respectively. Chemical leaching had higher recovery of REEs in most fractions; however, bioweathering had enhanced recovery of the individual REEs, especially scandium, yttrium, ytterbium, terbium, erbium, and lutetium from Healy coal at low specific gravity samples and yttrium from Wishbone Hill coal at high specific gravity samples. The results highlight the potential for developing cost-effective and selective REE biorecovery processes that can help address the global critical mineral supply chain risk.

show abstract

Impact of Shewanella oneidensis on heavy metals remobilization under reductive conditions in soil of Guilan Province, Iran

Cited by 13 publications

References 52 publications

Bio-weathering Using Shewanella oneidensis MR-1 Enhances Selective Recovery of Rare Earth Elements from Alaskan Coal Mines

Bio-weathering Using Shewanella oneidensis MR-1 Enhances Selective Recovery of Rare Earth Elements from Alaskan Coal Mines

Bio-weathering Using Shewanella oneidensis MR-1 Enhances Selective Recovery of Rare Earth Elements from Alaskan Coal Mines

Bioweathering Using Shewanella oneidensis MR-1 Enhances Recovery of Rare Earth Elements from Alaskan Coal Mines

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