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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1080/09593330.2019.1701564
|2 doi
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|a pubmed24n1013.xml
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|a (DE-627)NLM30399567X
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|a (NLM)31797752
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Song, Yongwei
|e verfasserin
|4 aut
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| 245 |
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|a The coupling reaction of Fe2+ bio-oxidation and resulting Fe3+ hydrolysis drastically improve the formation of iron hydroxysulfate minerals in AMD
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 09.06.2021
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|a Date Revised 09.06.2021
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a The oxidation of Fe2+ by Acidithiobacillus ferrooxidans (A. ferrooxidans) in acid mine drainage (AMD) is often accompanied by formation of iron hydroxysulfate minerals, such as schwertmannite and jarosite. This study reported that 80 mmol L-1 of Fe2+ could be completely oxidized by A. ferrooxidans LX5 within 48 h, but only 27.7% of the resultant Fe3+ precipitated to form schwertmannite. However, the conversion efficiency to jarosite was much higher (54.5%). The formation of jarosite lasted 120 h, while only 24 h when conversed to schwertmannite. By constructing a cyclic process of 'Cu-reducing coupled with bio-oxidization', the total Fe in AMD could be fully converted into mineral precipitates. The resultant mineral specie could be regulated simply by control the K+ concentration. Thermodynamically, Fe3+ cannot hydrolyze spontaneously to form schwertmannite due to the positive Gibbs free energy (ΔrGm∘ = 6.63 kJ mol-1) of the reaction. However, if Fe2+ were biologically oxidized by A. ferrooxidans, the resultant Fe3+ could spontaneously form schwertmannite because the aforementioned coupling reaction has a negative Gibbs free energy (ΔrGm∘ = -34.12 kJ mol-1). Even though Fe3+ itself could hydrolyze to form jarosite spontaneously with ΔrGm∘ = -22.20 kJ mol-1, the coupling reaction of Fe2+ bio-oxidation followed by Fe3+ hydrolysis in the presence of K+ could easily promote the formation of jarosite, which exhibited a great negative Gibbs energy (ΔrGm∘ = -67.45 kJ mol-1)
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| 650 |
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|a Journal Article
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|a Acidithiobacillus ferrooxidans
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| 650 |
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|a acid mine drainage
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| 650 |
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4 |
|a coupling
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| 650 |
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4 |
|a iron hydroxysulfate minerals
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| 650 |
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4 |
|a thermodynamics
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| 650 |
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|a Ferric Compounds
|2 NLM
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| 650 |
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7 |
|a Minerals
|2 NLM
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| 650 |
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|a Iron
|2 NLM
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| 650 |
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7 |
|a E1UOL152H7
|2 NLM
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| 700 |
1 |
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|a Yang, Linlin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Heru
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sun, Xinxin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Bai, Shuangyou
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Ning
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liang, Jianru
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhou, Lixiang
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Environmental technology
|d 1993
|g 42(2021), 15 vom: 01. Juni, Seite 2325-2334
|w (DE-627)NLM098202545
|x 1479-487X
|7 nnns
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| 773 |
1 |
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|g volume:42
|g year:2021
|g number:15
|g day:01
|g month:06
|g pages:2325-2334
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|u http://dx.doi.org/10.1080/09593330.2019.1701564
|3 Volltext
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|d 42
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