Bioremediation process and bioremoval mechanism of heavy metal ions in acidic mine drainage

Zhao, Ying; Fu, Zhijing; XiaoFei, Chen; Zhang, Guoyan

doi:10.1007/s40242-018-7255-6

Cited by 8 publications

(9 citation statements)

References 22 publications

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“…One of these isolates (UDEC_USS ASMT5 isolate) was confirmed to belong to the SRB group, responsible for the production of sulfides in the bioreactors, while the other three isolates did not present evidence of sulfidogenesis. The first isolate and the predominant culturable bacteria in effluent samples (between 55-70%; data not shown) corresponded to the neutrophilic sulfate-reducing species Desulfovibrio marrakechensis, which has been reported in other sulfidogenic reactors for the treatment of AMD [43][44][45]. The second isolate was a facultative anaerobic species of the genus Streptococcus, which has been reported within the microbial diversity present in an anaerobic sulfate-reducing bioreactor [46].…”

Section: Identification Of Bacterial Isolatesmentioning

confidence: 66%

Evaluation of Dispersed Alkaline Substrate and Diffusive Exchange System Technologies for the Passive Treatment of Copper Mining Acid Drainage

Schwarz

Nancucheo

Gaete

et al. 2020

Water

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The study evaluates the performance of the novel ADES (alkaline diffusive exchange System), SDES (sulfidogenic diffusive exchange system) and DAS (Dispersed Alkaline Substrate) technologies for the passive treatment of high-strength acid mine drainage (AMD) from copper mining (pH~3, 633 mg Cu L−1). The chemical DAS and ADES prototypes showed the best performance in the removal of Cu, Al, and Zn (98–100%), while the biochemical SDES reactors achieved a high sulfate removal rate (average of 0.28 mol m−3 day-1). Notably, the DES technology was effective in protecting the sulfate-reducing communities from the high toxicity of the AMD, and also in maintaining bed permeability, an aspect that was key in the ADES reactor. The DAS reactor showed the highest reactivity, accumulating the metallic precipitates in a lower reactor volume, allowing to conclude that it requires the lowest hydraulic residence time among all the reactors. However, the concentration of precipitates resulted in the formation of a hardpan, which may trigger the need of removing it to avoid compromising the continuity of the treatment process. This study suggests the development of new treatment alternatives by combining the strengths of each technology in combined or serial treatments.

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Section: Identification Of Bacterial Isolatesmentioning

confidence: 66%

Evaluation of Dispersed Alkaline Substrate and Diffusive Exchange System Technologies for the Passive Treatment of Copper Mining Acid Drainage

Schwarz

Nancucheo

Gaete

et al. 2020

Water

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“…From the eighth day to the tenth, SRB formed a dense biofilm on the surface of X80 steel, which caused the corrosion rate of the substrate to decrease. At the same time, the sulfide produced by SRB during growth and metabolism attaches to the gap of the biofilm, which further strengthens the effect of the biofilm on the surface of X80 steel on the diffusion of solution ions [ 31 ]. In addition, the presence of straight line is warburg impedance in the high frequency region, which This shows that there is a diffusion control process in the electrochemical corrosion process.…”

Section: Resultsmentioning

confidence: 99%

Study on corrosion behavior of X80 steel under stripping coating by sulfate reducing bacteria

2021

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Background At present, microorganism has been considered as important factors that threaten to buried pipelines with disbonded coatings. Aiming at the problem of unknown corrosion mechanism of sulfate-reducing bacteria (SRB), a series of studies have been carried out in this paper. Spectrophotometer and fluorescent labeling technology are used to study the growth and attachment of SRB in the simulated soil solution. The corrosion behavior of X80 pipeline steel with or without SRB was researched by electrochemical methods such as open circuit potential, dynamic potential polarization curve, and electrochemical impedance spectroscopy. The microscopic morphology of the corrosion products on the surface was observed with a scanning electron microscope (SEM), and the element content of the corrosion products on the surface of the sample after corrosion was observed using X-ray energy spectrum (EDS) analysis. Results The results showed that the growth and reproduction of SRB caused the pH of the soil simulated solution to increase, which may promote the corrosion of X80 steel. In addition, the cathode reaction of X80 steel in a sterile environment is the reduction of H+, and the main corrosion product is iron oxide. When the soil simulation solution contains SRB, the cathodic reaction is controlled by both H+ reduction and sulfide depolarization reactions, and FeS appears in the corrosion products. Conclusion Although the life cycle of SRB is only about 14 days, the corrosion of X80 steel is greatly promoted by SRB, and even causes corrosion perforation, which will bring huge economic losses and serious safety hazards.

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“…SRB formed a dense biofilm on the surface of X80 steel, which caused the corrosion rate of the substrate to decrease and the corresponding impedance arc radius to increase. At the same time, the sulfide produced by SRB during growth and metabolism attaches to the gap of the biofilm, which further strengthens the effect of the biofilm on the surface of X80 steel on the diffusion of solution ions [33] . According to Fig.…”

Section: Growth Of Srbmentioning

confidence: 90%

Study on Corrosion Behavior of X80 Steel under Stripping Coating by Sulfate Reducing Bacteria

Cui

Qin

Gao

2020

Preprint

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Background: At present, microorganism has been considered as important factors that threaten to buried pipelines with disbonded coatings. Aiming at the problem of unknown corrosion mechanism of sulfate-reducing bacteria (SRB), a series of studies have been carried out in this paper. Spectrophotometer and fluorescent labeling technology are used to study the growth and attachment of SRB in the simulated soil solution. The electrochemical behavior of X80 pipeline steel with or without SRB was researched by electrochemical methods such as open circuit potential, dynamic potential polarization curve, and electrochemical impedance spectroscopy. The microscopic morphology of the corrosion products on the surface of the sample was observed with a scanning electron microscope (SEM), and the element content of the corrosion products on the surface of the sample after corrosion was observed using X-ray energy spectrum (EDS) analysis. Results: The results showed that the growth and reproduction of SRB caused the pH of the soil simulated solution to increase, which promoted the corrosion of X80 steel. In addition, the cathode reaction of X80 steel in a sterile environment is the reduction of H+, and the main corrosion product is Fe oxides. When the soil simulation solution contains SRB, the cathodic reaction is controlled by both H+ reduction and sulfide depolarization reactions, and FeS appears in the corrosion products. Conclusion: Although the life cycle of SRB is only about 14 days, the corrosion of X80 steel is greatly promoted by SRB, and even causes corrosion perforation, which will bring huge economic losses and serious safety hazards.

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Bioremediation process and bioremoval mechanism of heavy metal ions in acidic mine drainage

Cited by 8 publications

References 22 publications

Evaluation of Dispersed Alkaline Substrate and Diffusive Exchange System Technologies for the Passive Treatment of Copper Mining Acid Drainage

Evaluation of Dispersed Alkaline Substrate and Diffusive Exchange System Technologies for the Passive Treatment of Copper Mining Acid Drainage

Study on corrosion behavior of X80 steel under stripping coating by sulfate reducing bacteria

Study on Corrosion Behavior of X80 Steel under Stripping Coating by Sulfate Reducing Bacteria

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