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Zhang DR, Zhang RY, Zhu XT, Kong WB, Cao C, Zheng L, Pakostova E. Novel insights into the kinetics and mechanism of arsenopyrite bio-dissolution enhanced by pyrite. JOURNAL OF HAZARDOUS MATERIALS 2024; 470:134193. [PMID: 38569341 DOI: 10.1016/j.jhazmat.2024.134193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/21/2024] [Accepted: 03/30/2024] [Indexed: 04/05/2024]
Abstract
Arsenopyrite and pyrite often coexist in metal deposits and tailings, thus simultaneous bioleaching of both sulfides has economic (as well as environmental) significance. Important targets in bio-oxidation operations are high solubilization rates and minimized accumulation of Fe(III)/As-bearing secondary products. This study investigated the role of pyrite bioleaching in the enhancement of arsenopyrite dissolution. At a pyrite to arsenopyrite mass ratio of 1:1, 93.6% of As and 93.0% of Fe were solubilized. The results show that pyrite bio-oxidation can promote arsenopyrite dissolution, enhance S0 bio-oxidation, and inhibit the formation of jarosites, tooeleite, and amorphous ferric arsenate. The dry weight of the pyrite & arsenopyrite residue was reduced by 95.1% after bioleaching, compared to the initial load, while only 5% weight loss was observed when pyrite was absent. A biofilm was formed on the arsenopyrite surface in the presence of pyrite, while a dense passivation layer was observed in the absence of pyrite. As(III) (as As2O3) was a dominant As species in the pyrite & arsenopyrite residue. Novel and detailed findings are presented on arsenopyrite bio-dissolution in the presence of pyrite, and the presented approach could contribute to the development of novel cost-effective extractive bioprocesses. ENVIRONMENTAL IMPLICATION: The oxidation of arsenopyrite presents significant environmental hazards, as it can contribute to acid mine drainage generation and arsenic mobilization from sulfidic mine wastes. Bioleaching is a proven cost-effective and environmentally friendly extractive technology, which has been applied for decades in metal recovery from minerals or tailings. In this work, efficient extraction of arsenic from arsenopyrite bioleaching was presented through coupling the process with bio-oxidation of pyrite, resulting in lowered accumulation of hazardous and metastable Fe(III)/As-bearing secondary phases. The results could help improve current biomining operations and/or contribute to the development of novel cost-effective bioprocesses for metal extraction.
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Affiliation(s)
- Duo-Rui Zhang
- College of Life Sciences, Northwest Normal University, Lanzhou 730070, China.
| | - Rui-Yong Zhang
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China
| | - Xue-Tai Zhu
- College of Life Sciences, Northwest Normal University, Lanzhou 730070, China.
| | - Wei-Bao Kong
- College of Life Sciences, Northwest Normal University, Lanzhou 730070, China
| | - Chun Cao
- Key Laboratory of Resource Environment and Sustainable Development of Oasis, Lanzhou, Gansu Province 730070, China
| | - Lei Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Eva Pakostova
- MIRARCO Mining Innovation, 935 Ramsey Lake Road, Sudbury, ON P3E 2C6, Canada; Goodman School of Mines, Laurentian University, 935 Ramsey Lake Road, Sudbury, ON P3E 2C6, Canada
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2
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Sun X, Huang D, Huang Y, Häggblom M, Soleimani M, Li J, Chen Z, Chen Z, Gao P, Li B, Sun W. Microbial-mediated oxidative dissolution of orpiment and realgar in circumneutral aquatic environments. WATER RESEARCH 2024; 251:121163. [PMID: 38266438 DOI: 10.1016/j.watres.2024.121163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 01/15/2024] [Accepted: 01/16/2024] [Indexed: 01/26/2024]
Abstract
Arsenic (As) is a toxic metalloid that causes severe environmental contamination worldwide. Upon exposure to aqueous phases, the As-bearing minerals, such as orpiment (As2S3) and realgar (As4S4), undergo oxidative dissolution, in which biotic and abiotic activities both contributed significant roles. Consequently, the dissolved As and S are rapidly discharged through water transportation to broader regions and contaminate surrounding areas, especially in aquatic environments. Despite both orpiment and realgar are frequently encountered in carbonate-hosted neutral environments, the microbial-mediated oxidative dissolution of these minerals, however, have been primarily investigated under acidic conditions. Therefore, the current study aimed to elucidate microbial-mediated oxidative dissolution under neutral aquatic conditions. The current study demonstrated that the dissolution of orpiment and realgar is synergistically regulated by abiotic (i.e., specific surface area (SSA) of the mineral) and biotic (i.e., microbial oxidation) factors. The initial dissolution of As(III) and S2- from minerals is abiotically impacted by SSA, while the microbial oxidation of As(III) and S2- accelerated the overall dissolution rates of orpiment and realgar. In As-contaminated environments, members of Thiobacillus and Rhizobium were identified as the major populations that mediated oxidative dissolution of orpiment and realgar by DNA-stable isotope probing. This study provides novel insights regarding the microbial-mediated oxidative dissolution process of orpiment and realgar under neutral conditions.
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Affiliation(s)
- Xiaoxu Sun
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Academy of Sciences, Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Duanyi Huang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Academy of Sciences, Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
| | - Yuqing Huang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Academy of Sciences, Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Max Häggblom
- Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, NJ 08901, USA
| | - Mohsen Soleimani
- Department of Natural Resources, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Jiayi Li
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Academy of Sciences, Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Zheng Chen
- Department of Health and Environmental Sciences, Xi'an Jiaotong-Liverpool University, Suzhou 215123, China
| | - Zhenyu Chen
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Academy of Sciences, Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; School of Environment, Henan Normal University, Xinxiang 453007, China
| | - Pin Gao
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Academy of Sciences, Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Baoqin Li
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Academy of Sciences, Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Weimin Sun
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Academy of Sciences, Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
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3
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Acidithiobacillus ferrooxidans and mixed Acidophilic microbiota oxidation to remove sulphur impurity from iron concentrate. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Chen HR, Zhang DR, Li Q, Nie ZY, Pakostova E. Release and fate of As mobilized via bio-oxidation of arsenopyrite in acid mine drainage: Importance of As/Fe/S speciation and As(III) immobilization. WATER RESEARCH 2022; 223:118957. [PMID: 35970106 DOI: 10.1016/j.watres.2022.118957] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 08/03/2022] [Accepted: 08/06/2022] [Indexed: 06/15/2023]
Abstract
Mining activities expose sulfidic minerals including arsenopyrite (FeAsS) to acid mine drainage (AMD). The subsequent release of toxic arsenic (As) can have great negative implications for the environment and human health. This study investigated the evolution of secondary products and As speciation transformations during arsenopyrite bio-oxidation in AMD collected from a polymetallic mine. Immobilization of the As solubilized via arsenopyrite bio-oxidation using red mud (RM) was also studied. The results show that the high ionic strength (concentrations of dissolved Fe3+, SO42-, and Ca2+ reached values up to 0.75, 3.38, and 0.35 g/L, respectively) and redox potential (up to +621 mV) of AMD (caused primarily by Fe3+) enhanced the dissolution of arsenopyrite. A high [Fe]aq/[As]aq ratio in the AMD favored the precipitation of tooeleite during arsenopyrite bio-oxidation, and the formation of other poorly crystalline products such as schwertmannite and amorphous ferric arsenate also contributed to As immobilization. Bacterial cells served as important nucleation sites for the precipitation of mineral phases. Arsenopyrite completely dissolved after 12 days of bio-oxidation in AMD and the [As]aq (mainly present as As(III)) reached 1.92 g/L, while a greater [As]aq was observed in a basal salts medium (BSM) assay (reaching 3.02 g/L). An RM addition significantly promoted As(III) immobilization, with final [As(III)]aq decreasing to 0.16 and 1.43 g/L in AMD and BSM assays respectively. No oxidation of As(III) was detected during the immobilization process. These findings can help predict As release from arsenopyrite on contact with AMD and, on a broader scale, assist in designing remediation and treatment strategies to mitigate As contamination in mining.
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Affiliation(s)
- Hong-Rui Chen
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Duo-Rui Zhang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
| | - Qian Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
| | - Zhen-Yuan Nie
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Eva Pakostova
- Centre for Sport, Exercise and Life Sciences, Coventry University, Coventry CV1 5FB, UK
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Shen C, Zhang G, Li K, Yang C. A pathway of the generation of acid mine drainage and release of arsenic in the bioleaching of orpiment. CHEMOSPHERE 2022; 298:134287. [PMID: 35283152 DOI: 10.1016/j.chemosphere.2022.134287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 03/06/2022] [Accepted: 03/07/2022] [Indexed: 06/14/2023]
Abstract
Arsenic in acid mine drainage (AMD) is commonly associated with the bioleaching of arsenic sulfide minerals. Orpiment is iron free and one of the most common arsenic sulfide minerals, but no studies are involved with the relationship between the iron free bioleaching of orpiment and the generation of arsenic-containing AMD. In this study, the iron free bioleaching experiments with Acidithiobacillus thiooxidans (T.t) or Acidithiobacillus caldus (A.c) were carried out. In the experiments with T.t, the pH value decreased with time, and the leached arsenic increased significantly. Meanwhile, the density of planktonic bacteria increased gradually, suggesting that T.t survived in the orpiment pulp. However, in the experiments with initial pH of 1, pH changed little and arsenic was nearly not leached, implying that the bioleaching of orpiment can be inhibited when the initial pH was too low. The XRD patterns and the TFESEM-EDS analyses showed that no elemental sulfur was detected on the orpiment surface. It was supposed that the sulfur was converted to sulfuric acid in the bioleaching process. The CFESEM images showed that no corrosion pits were formed though a few cells adhered to the orpiment surface, and the TEM images showed that no extracellular polymeric substances (EPS) were excreted by the attached cells on the orpiment particles. In the experiments with A.c, similar results were obtained. It is inferred that the bioleaching of orpiment under iron deficient conditions in mining areas generates arsenic-containing AMD, but can be inhibited when the initial pH is too low.
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Affiliation(s)
- Cailong Shen
- State Key Laboratory of Biochemical Engineering, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Guangji Zhang
- State Key Laboratory of Biochemical Engineering, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Kexin Li
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China
| | - Chao Yang
- State Key Laboratory of Biochemical Engineering, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, 515031, China.
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6
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Zhang Y, Li Q, Sun S, Liu X, Jiang T, Lyu X, He Y. Electrochemical behaviour of the oxidative dissolution of arsenopyrite catalysed by Ag+ in 9K culture medium. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126169] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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7
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Role of Ag+ in the Bioleaching of Arsenopyrite by Acidithiobacillus ferrooxidans. METALS 2020. [DOI: 10.3390/met10030403] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Arsenopyrite (FeAsS) is often associated with gold, but pre-treatment is necessary prior to gold leaching, mainly due to the gold encapsulation in the matrix of FeAsS. Bio-oxidation is attractive and promising, largely due to its simplicity, low cost and environmental friendliness. A critical problem that still impedes the large-scale applications of this green technology is its slow leaching kinetics. Some metal ions such as Ag+ have previously been found to expedite the bioleaching process. In this paper, the role of Ag+ in the arsenopyrite bioleaching by Acidithiobacillus ferrooxidans was investigated in detail by bioleaching experiments and a series of analyses including thermodynamics, X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Experimental results suggested that addition of 5 mg/L Ag+ to the leaching system could significantly improve the final As leaching efficiency from 30.4% to 47.8% and shorten the bioleaching period from 19 days to 15 days. Thermodynamic analysis indicates that Ag+ destabilises As2S2, As2S3 and S0 via forming Ag2S, which is confirmed by the XRD analysis on the phase transformation during bioleaching. SEM and XPS analyses further showed that Ag+ removed the passivating film consisting mainly of As2S2, As2S3 and S0 because Ag2S formed on the arsenopyrite surface from the start bioleaching of 36 h. In the presence of Fe3+, Ag2S could easily be dissolved to Ag+ again, likely leading to the establishment of the Ag+/Ag2S cycle. The bacteria utilised the two synergistic cycles of Fe3+/Fe2+ and Ag+/Ag2S to catalyse the bioleaching of arsenopyrite.
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Zhang DR, Chen HR, Xia JL, Nie ZY, Fan XL, Liu HC, Zheng L, Zhang LJ, Yang HY. Humic acid promotes arsenopyrite bio-oxidation and arsenic immobilization. JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121359. [PMID: 31635821 DOI: 10.1016/j.jhazmat.2019.121359] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 09/15/2019] [Accepted: 09/28/2019] [Indexed: 06/10/2023]
Abstract
The bio-oxidative dissolution of arsenopyrite, the most severe arsenic contamination source, can be mediated by organic substances, but pertinent studies on this subject are scarce. In this study, the bio-oxidative dissolution of arsenopyrite by Sulfobacillus thermosulfidooxidans and arsenic immobilization were evaluated in the presence of humic acid (HA). The mineral dissolution was monitored through analyses of the parameters in solution, phase and element speciation transformations on the mineral surface, and arsenic immobilization on the surfaces of cells and jarosites-HA. The results show that the presence of HA enhances the dissolution of arsenopyrite, e.g., 7.1% of arsenopyrite was in the residue after 12 d of bio-oxidation compared to 19.3% in the absence of HA. Meanwhile, the presence of HA led to changes of the fates of As and Fe and no accumulation of elemental sulfur (S0) or ferric arsenate on the mineral surface. Moreover, a flocculent porous structure was formed on the surfaces of both microbial cells and jarosites, on which a large amount of arsenic was adsorbed. These results clearly indicate that HA can simultaneously promote the dissolution of arsenopyrite and arsenic immobilization, which may be significant for bioleaching of arsenopyrite-bearing contaminated sites.
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Affiliation(s)
- Duo-Rui Zhang
- Key Lab of Biometallurgy of Ministry of Education of China, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Hong-Rui Chen
- Key Lab of Biometallurgy of Ministry of Education of China, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Jin-Lan Xia
- Key Lab of Biometallurgy of Ministry of Education of China, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
| | - Zhen-Yuan Nie
- Key Lab of Biometallurgy of Ministry of Education of China, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Xiao-Lu Fan
- Key Lab of Biometallurgy of Ministry of Education of China, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Hong-Chang Liu
- Key Lab of Biometallurgy of Ministry of Education of China, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Lei Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Li-Juan Zhang
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
| | - Hong-Ying Yang
- School of Metallurgy, Northeastern University, Shenyang 110819, China
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Zhang DR, Xia JL, Nie ZY, Chen HR, Liu HC, Deng Y, Zhao YD, Zhang LL, Wen W, Yang HY. Mechanism by which ferric iron promotes the bioleaching of arsenopyrite by the moderate thermophile Sulfobacillus thermosulfidooxidans. Process Biochem 2019. [DOI: 10.1016/j.procbio.2019.03.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Nguyen VK, Ha MG, Shin S, Seo M, Jang J, Jo S, Kim D, Lee S, Jung Y, Kang P, Shin C, Ahn Y. Electrochemical effect on bioleaching of arsenic and manganese from tungsten mine wastes using Acidithiobacillus spp. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 223:852-859. [PMID: 29986334 DOI: 10.1016/j.jenvman.2018.06.040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 06/06/2018] [Accepted: 06/12/2018] [Indexed: 06/08/2023]
Abstract
Mine wastes from tungsten mine which contain a high concentration of arsenic (As) may expose many environmental problems because As is very toxic. This study aimed to evaluate bioleaching efficiency of As and manganese (Mn) from tungsten mine wastes using the pure and mixed culture of Acidithiobacillus ferrooxidans and A. thiooxidans. The electrochemical effect of the electrode through externally applied voltage on bacterial growth and bioleaching efficiency was also clarified. The obtained results indicated that both the highest As extraction efficiency (96.7%) and the highest Mn extraction efficiency (100%) were obtained in the mixed culture. A. ferrooxidans played a more important role than A. thiooxidans in the extraction of As whereas A. thiooxidans was more significant than A. ferrooxidans in the extraction of Mn. Unexpectedly, the external voltage applied to the bioleaching did not enhance metal extraction rate but inhibited bacterial growth, resulting in a reverse effect on bioleaching efficiency. This could be due to the low electrical tolerance of bioleaching bacteria. However, this study asserted that As and Mn could be successfully removed from tungsten mine waste by the normal bioleaching using the mixed culture of A. ferrooxidans and A. thiooxidans.
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Affiliation(s)
- Van Khanh Nguyen
- Department of Environmental Engineering, Dong-A University, Busan 49315, Republic of Korea
| | - Myung-Gyu Ha
- Korea Basic Science Institute, Busan Center, Busan 46742, Republic of Korea
| | - Seunghye Shin
- BUSAN IL Science High School, Busan 49317, Republic of Korea
| | - Minhyeong Seo
- BUSAN IL Science High School, Busan 49317, Republic of Korea
| | - Jongwon Jang
- BUSAN IL Science High School, Busan 49317, Republic of Korea
| | - Seungjin Jo
- BUSAN IL Science High School, Busan 49317, Republic of Korea
| | - Donghyeon Kim
- BUSAN IL Science High School, Busan 49317, Republic of Korea
| | - Sungmin Lee
- BUSAN IL Science High School, Busan 49317, Republic of Korea
| | - Yoonho Jung
- BUSAN IL Science High School, Busan 49317, Republic of Korea
| | | | - Chajeong Shin
- BUSAN IL Science High School, Busan 49317, Republic of Korea
| | - Yeonghee Ahn
- Department of Environmental Engineering, Dong-A University, Busan 49315, Republic of Korea.
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11
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Deng S, Gu G, Wu Z, Xu X. Bioleaching of arsenopyrite by mixed cultures of iron-oxidizing and sulfur-oxidizing microorganisms. CHEMOSPHERE 2017; 185:403-411. [PMID: 28710989 DOI: 10.1016/j.chemosphere.2017.07.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 07/02/2017] [Accepted: 07/08/2017] [Indexed: 06/07/2023]
Abstract
Arsenic is a critical environmental pollutant associated with acid mine drainage. Arsenopyrite is one of the major arsenic sulfide minerals whose weathering lead to the contamination of arsenic. In this study, the leaching behaviors of arsenopyrite by two mixed cultures of iron-oxidizing and sulfur-oxidizing microorganisms (Ferroplasma thermophilum and Acidithiobacillus caldus, Sulfobacillus thermosulfidooxidans and Acidithiobacillus caldus) were investigated, accompanying with community structure analysis of free microorganisms. The ratio of F. thermophilum to A. caldus of 1/1 showed a more favorable effect on the arsenic leaching than other ratios, and F. thermophilum played a dominant role in the solution all the leaching time. While adding A. caldus in the S. thermosulfidooxidans bioleaching system, the dissolution of arsenopyrite was suppressed. Notably, when the ratio of S. thermosulfidooxidans to A. caldus was 2/1, the arsenic extraction was accelerated at the early stage, but later it slowed down. The reason was because A. caldus was the predominant species at the later stage which made the redox potential decrease faster. XRD demonstrated that the proper addition of A. caldus could eliminate the sulfur passivation and promote the leaching in a degree. These studies are helpful to evaluate the environmental impact of arsenic.
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Affiliation(s)
- Sha Deng
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, PR China
| | - Guohua Gu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, PR China.
| | - Ziteng Wu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, PR China
| | - Xiongyi Xu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, PR China
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12
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Ye M, Yan P, Sun S, Han D, Xiao X, Zheng L, Huang S, Chen Y, Zhuang S. Bioleaching combined brine leaching of heavy metals from lead-zinc mine tailings: Transformations during the leaching process. CHEMOSPHERE 2017; 168:1115-1125. [PMID: 27884516 DOI: 10.1016/j.chemosphere.2016.10.095] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 10/18/2016] [Accepted: 10/24/2016] [Indexed: 05/28/2023]
Abstract
During the process of bioleaching, lead (Pb) recovery is low. This low recovery is caused by a problem with the bioleaching technique. This research investigated the bioleaching combination of bioleaching with brine leaching to remove heavy metals from lead-zinc mine tailings. The impact of different parameters were studied, including the effects of initial pH (1.5-3.0) and solid concentration (5-20%) for bioleaching, and the effects of sodium chloride (NaCl) concentration (10-200 g/L) and temperature (25 and 50 °C) for brine leaching. Complementary characterization experiments (Sequential extraction, X-ray diffractometer (XRD), scanning electronic microscope (SEM)) were also conducted to explore the transformation of tailings during the leaching process. The results showed that bioleaching efficiency was significantly influenced by initial pH and solid concentration. Approximately 85.45% of iron (Fe), 4.12% of Pb, and 97.85% of zinc (Zn) were recovered through bioleaching in optimum conditions. Increasing the brine concentration and temperature promoted lead recovery. Lead was recovered from the bioleaching residues at a rate of 94.70% at 25 °C and at a rate of 99.46% at 50 °C when the NaCl concentration was 150 g/L. The study showed that bioleaching significantly changed the speciation of heavy metals and the formation and surface morphology of tailings. The metals were mainly bound in stable fractions after bioleaching.
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Affiliation(s)
- Maoyou Ye
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China; Key Laboratory of Mining and Metallurgy Industry Heavy Metals Pollution Control of Environmental Protection of Guangdong Province, Guangzhou 510006, China
| | - Pingfang Yan
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China; Key Laboratory of Mining and Metallurgy Industry Heavy Metals Pollution Control of Environmental Protection of Guangdong Province, Guangzhou 510006, China
| | - Shuiyu Sun
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China; Guangdong Polytechnic College of Environmental Protection Engineering, Foshan 528216, China; Key Laboratory of Mining and Metallurgy Industry Heavy Metals Pollution Control of Environmental Protection of Guangdong Province, Guangzhou 510006, China.
| | - Dajian Han
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Xiao Xiao
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Li Zheng
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China; Key Laboratory of Mining and Metallurgy Industry Heavy Metals Pollution Control of Environmental Protection of Guangdong Province, Guangzhou 510006, China
| | - Shaosong Huang
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China; Key Laboratory of Mining and Metallurgy Industry Heavy Metals Pollution Control of Environmental Protection of Guangdong Province, Guangzhou 510006, China
| | - Yun Chen
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Shengwei Zhuang
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
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Fonti V, Dell'Anno A, Beolchini F. Does bioleaching represent a biotechnological strategy for remediation of contaminated sediments? THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 563-564:302-319. [PMID: 27139303 DOI: 10.1016/j.scitotenv.2016.04.094] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 03/30/2016] [Accepted: 04/01/2016] [Indexed: 06/05/2023]
Abstract
Bioleaching is a consolidated biotechnology in the mining industry and in bio-hydrometallurgy, where microorganisms mediate the solubilisation of metals and semi-metals from mineral ores and concentrates. Bioleaching also has the potential for ex-situ/on-site remediation of aquatic sediments that are contaminated with metals, which represent a key environmental issue of global concern. By eliminating or reducing (semi-)metal contamination of aquatic sediments, bioleaching may represent an environmentally friendly and low-cost strategy for management of contaminated dredged sediments. Nevertheless, the efficiency of bioleaching in this context is greatly influenced by several abiotic and biotic factors. These factors need to be carefully taken into account before selecting bioleaching as a suitable remediation strategy. Here we review the application of bioleaching for sediment bioremediation, and provide a critical view of the main factors that affect its performance. We also discuss future research needs to improve bioleaching strategies for contaminated aquatic sediments, in view of large-scale applications.
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Affiliation(s)
- Viviana Fonti
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy.
| | - Antonio Dell'Anno
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy
| | - Francesca Beolchini
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy
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