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Feng G, Mao Y, Xie G, Chen H, Wang J, Mao P, Lv J. Bioremediation of uranium (Ⅵ) using a native strain Halomonas campaniensis ZFSY-04 isolated from uranium mining and milling effluent: Potential and mechanism. CHEMOSPHERE 2024; 346:140646. [PMID: 37944766 DOI: 10.1016/j.chemosphere.2023.140646] [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: 05/02/2023] [Revised: 09/30/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023]
Abstract
A significant surge in the exploitation of uranium resources has resulted in considerable amounts of radioactive effluents. Thus, efficient and eco-friendly uranium removal strategies need to be explored to ensure ecological safety and resource recovery. In this study, we investigated the resistance of Halomonas campaniensis strain ZFSY-04, isolated from an evaporation pool at a uranium mine site, and its potential mechanism of uranium (Ⅵ) removal. The results showed that the strain exhibited unique uranium tolerance and its growth was not significantly inhibited under a uranium concentration of 700 mg/L. It had a maximum loading capacity of 865.40 mg/g (dry weight), achieved following incubation under uranium concentration of 100 mg/L, pH 6.0, and temperature 30 °C, for 2 h, indicating that the removal of uranium by the strain was efficient and rapid. Combined with kinetic, isothermal, thermodynamic, and microspectral analyses, the mechanism of uranium loading by strain ZFSY-04 was metabolism-dependent and diverse, including, physical and chemical adsorption on the cell surface, extracellular biomineralisation, intracellular bioaccumulation, and biomineralisation. Our results highlight the unique properties of indigenous strains, including high resistance, high efficiency, rapid uranium removal, and various uranium removal strategies, which make it suitable as a new tool for in situ bioremediation and uranium-contaminated environmental resource recovery.
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Affiliation(s)
- Guangwen Feng
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Yu Mao
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Gen Xie
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Henglei Chen
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Jun Wang
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Peihong Mao
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Jie Lv
- College of Life Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China.
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Chen X, Cai S, Zhang N, Yang J, Peng T, Yang F. Biosorption of U(VI) and mechanisms by live and dead cells of Sphingopyxis sp. YF1. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:109469-109480. [PMID: 37924175 DOI: 10.1007/s11356-023-29881-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 09/10/2023] [Indexed: 11/06/2023]
Abstract
Heavy metal pollution seriously threatens the environment and human health. The biosorption of heavy metals has attracted worldwide attention due to its cost-effectiveness and environmental friendliness. It is significant to develop biosorbents with excellent adsorption performance. Sphingopyxis is widely used in the removal of various organic pollutants, but its potential application in heavy metal adsorption has been largely overlooked. This study investigates the biosorption of U(VI) onto live and dead cells of a Sphingopyxis strain YF1. The effects of pH, contact time and initial ion concentration on U(VI) adsorption investigated, and kinetic and isothermal models were used to fit the adsorption results. The results show that under pH 3-6, the adsorption of U(VI) by YF1 live cells increased with the increase of the pH. Both the pseudo-first order and pseudo-second order models can satisfactorily interpret the adsorption by live and dead cells. Three isothermal adsorption models (Langmuir, Freundlich, and Sips) were used to fit the adsorption process. The adsorption of uranium by live and dead cells was best fitted by the Sips model. The maximal adsorption capacities of U(VI) by live and dead cells were 140.7 mg g-1 and 205.7 mg g-1, respectively. The mechanisms of U(VI) adsorption by Sphingopyxis sp. YF1 were revealed. Scanning electron microscopy and energy dispersive spectroscopy (SEM-EDS) show that U(VI) was deposited on the surface of the bacterial cells. Fourier-transform infrared spectroscopy (FTIR) shows that amine, hydroxyl, alkyl, amide I, amide II, phosphate, carboxylates and carboxylic acids were the major functional groups that are involved in U(VI) adsorption by live and dead cells. X-ray photoelectron spectroscopy (XPS) suggests that the main functional groups of live cells involved in adsorption were O = C-O, C-OH/C-O-C and N-C = O. This study indicates Sphingopyxis sp. YF1 is a high-efficiency U(VI)-adsorbing strain, promising to remove U(VI) from aquatic environment.
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Affiliation(s)
- Xinxin Chen
- School of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Siheng Cai
- School of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Nan Zhang
- School of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Jieqiu Yang
- School of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Tangjian Peng
- Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, School of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Fei Yang
- Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, School of Public Health, Hengyang Medical School, University of South China, Hengyang, China.
- Hunan Provincial Key Laboratory of Clinical Epidemiology, Xiangya School of Public Health, Central South University, Changsha, China.
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3
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Zhou K, Zhou Y, Zhou H, Cheng H, Xu G. Kinetic process of the biosorption of Cu(II), Ni(II) and Cr(VI) by waste Pichia pastoris cells. ENVIRONMENTAL TECHNOLOGY 2023; 44:1730-1750. [PMID: 34842065 DOI: 10.1080/09593330.2021.2012266] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 11/19/2021] [Indexed: 06/13/2023]
Abstract
Waste biomass of Pichia pastoris (P.pastoris) cells from the fermentation industry is an environmentally friendly biosorption material. The present study aimed to explore the biosorption behaviour of waste P.pastoris cells for Cu(II), Ni(II) and Cr(VI) in aqueous solution conditions. The results showed that the adsorption kinetics of three kinds of metals were well-fitted with lineared Elovich, pseudo-second-order kinetics models, non-linear kinetics and adsorption isotherms. The effective biosorption rates for Cu(II), Ni(II) and Cr(VI) removal were 71.3%, 59.7% and 16.25% respectively. The maximum Cu(II) adsorption capacity of waste P.pastoris was 40 mg/g at pH = 4 and 225 mg/L of solute concentration for 0.4 g biomass, better than that of the living yeasts. The pattern of Fourier transform infrared (FTIR) indicated that functional groups such as -NH, -OH, Si-O, P-O-C were involved in Cu(II) adsorption process. The analysis of SEM-EDS, XRD and TEM-EDS can be concluded that Cu(II) occupied Ca(II) binding sites by ion exchange mechanism to remove flocculation, and Cu(II) adsorbed onto the diatomite containing in the industrial waste P.pastoris. Thus the adsorption mechanism of the industrial waste P.pastoris was proposed taking Cu(II) as the example. And consecutive biosorption/desorption cycles were used for the evaluation of the regeneration efficiency, suggesting the good regeneration and reusability of waste P.pastoris.
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Affiliation(s)
- Kaiyan Zhou
- School of Minerals Processing and Bioengineering, Central South University, Changsha, People's Republic of China
| | - Yulu Zhou
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, People's Republic of China
| | - Hongbo Zhou
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, People's Republic of China
| | - Haina Cheng
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, People's Republic of China
| | - Gang Xu
- Hunan Flag Bio-Tech Co., Ltd., Changsha, People's Republic of China
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Hu Z, Zhou Z, Zhou Y, Zheng L, Guo J, Liu Y, Sun Z, Yang Z, Yu X. Synergy of surface adsorption and intracellular accumulation for removal of uranium with Stenotrophomonas sp: Performance and mechanisms. ENVIRONMENTAL RESEARCH 2023; 220:115093. [PMID: 36574801 DOI: 10.1016/j.envres.2022.115093] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/10/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
Uranium is well-known to have serious adverse effects on the ecological environment and human health. Bioremediation stands out among many remediation methods owing to its being economically feasible and environmentally friendly. This study reported a great promising strategy for eliminating uranium by Stenotrophomonas sp. CICC 23833 in the aquatic environment. The bacterium demonstrated excellent uranium adsorption capacity (qmax = 392.9 mg/g) because of the synergistic effect of surface adsorption and intracellular accumulation. Further analysis revealed that hydroxyl, carboxyl, phosphate groups and proteins of microorganisms were essential in uranium adsorption. Intracellular accumulation was closely related to cellular activity, and the efficiency of uranium processing by the permeabilized bacterial cells was significantly improved. In response to uranium stress, the bacterium was found to release multiple ions in conjunction with uranium adsorption, which facilitates the maintenance of bacterial life activities and the conversion of uranyl to precipitates. These above results indicated that Stenotrophomonas sp. Had great potential application value for the remediation of uranium.
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Affiliation(s)
- Zhongqiang Hu
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Zhongkui Zhou
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Yaoyu Zhou
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China; College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
| | - Lili Zheng
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jianping Guo
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Yong Liu
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Zhanxue Sun
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Zhihui Yang
- School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
| | - Xiaoxia Yu
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China
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5
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Li Z, He Y, Sonne C, Lam SS, Kirkham MB, Bolan N, Rinklebe J, Chen X, Peng W. A strategy for bioremediation of nuclear contaminants in the environment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 319:120964. [PMID: 36584860 DOI: 10.1016/j.envpol.2022.120964] [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: 09/27/2022] [Revised: 12/12/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
Radionuclides released from nuclear contamination harm the environment and human health. Nuclear pollution spread over large areas and the costs associated with decontamination is high. Traditional remediation methods include both chemical and physical, however, these are expensive and unsuitable for large-scale restoration. Bioremediation is the use of plants or microorganisms to remove pollutants from the environment having a lower cost and can be upscaled to eliminate contamination from soil, water and air. It is a cheap, efficient, ecologically, and friendly restoration technology. Here we review the sources of radionuclides, bioremediation methods, mechanisms of plant resistance to radionuclides and the effects on the efficiency of biological adsorption. Uptake of radionuclides by plants can be facilitated by the addition of appropriate chemical accelerators and agronomic management, such as citric acid and intercropping. Future research should accelerate the use of genetic engineering and breeding techniques to screen high-enrichment plants. In addition, field experiments should be carried out to ensure that this technology can be applied to the remediation of nuclear contaminated sites as soon as possible.
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Affiliation(s)
- Zhaolin Li
- Henan Province International Collaboration Lab of Forest Resources Utilization, School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Yifeng He
- Henan Province International Collaboration Lab of Forest Resources Utilization, School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Christian Sonne
- Henan Province International Collaboration Lab of Forest Resources Utilization, School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China; Department of Ecoscience, Arctic Research Centre (ARC), Aarhus University, Frederiksborgvej 399, PO Box 358, DK-4000, Roskilde, Denmark
| | - Su Shiung Lam
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | | | - Nanthi Bolan
- UWA School of Agriculture and Environment, The UWA Institute of Agriculture, M079, Perth, WA, 6009, Australia
| | - Jörg Rinklebe
- Henan Province International Collaboration Lab of Forest Resources Utilization, School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China; University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation, Engineering, Water and Waste Management, Laboratory of Soil and Groundwater Management, Pauluskirchstraße 7, 42285, Wuppertal, Germany
| | - Xiangmeng Chen
- Henan Province International Collaboration Lab of Forest Resources Utilization, School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Wanxi Peng
- Henan Province International Collaboration Lab of Forest Resources Utilization, School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China.
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He Z, Dong L, Zhang K, Zhang D, Pan X. Lactic acid bacteria induce phosphate recrystallization for the in situ remediation of uranium-contaminated topsoil: Principle and application. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 314:120277. [PMID: 36167164 DOI: 10.1016/j.envpol.2022.120277] [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: 07/13/2022] [Revised: 09/10/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
Uranium (U) contamination often occurs in the topsoil (arable layer), and is a serious threat to crop growth. However, conventional microbial reduction methods are sensitive to oxygen and cannot be used to treat aerobic topsoils. In this study, phosphate-solubilizing microorganisms (PSM) were isolated from U-contaminated topsoil and used for soil remediation. Microbial metabolites and products were analyzed, and the pathways and mechanisms of PSM immobilization were revealed. The results showed that strain PSM8 had the highest phosphate-solubilizing capacity (dissolved P was 208 ± 5 mg/L) and the highest U removal rate (97.3 ± 0.1%). Multi-technical analyses indicated that bacterial surface functional groups adsorbed (UO2)2+ ions on the cell surface, glycolysis produced 3-10 mg/L of lactic acid (pH 4.7-6.0), and lactic acid solubilized Ca3(PO4)2 to form stable chernikovite (a type of uranyl phosphate) on the cell surface. The coupled application of Ca3(PO4)2 and strain PSM8 significantly reduced the bioavailability of soil U (62 ± 11%), converting U from the exchangeable to the residual phase and P from the steady to the available form. In addition, pot experiments showed that soil remediation promoted crop growth and significantly reduced U uptake and toxicity to photosynthetic systems. These findings demonstrate that PSM and Ca3(PO4)2 are good coupled fertilizers for U-contaminated agricultural soil.
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Affiliation(s)
- Zhanfei He
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, China
| | - Lingfeng Dong
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, China
| | - Keqing Zhang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, China
| | - Daoyong Zhang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, China; Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China.
| | - Xiangliang Pan
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, China; Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
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7
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Wang J, Tian Q, Cui L, Cheng J, Zhou H, Peng A, Qiu G, Shen L. Effect of extracellular proteins on Cd(II) adsorption in fungus and algae symbiotic system. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 323:116173. [PMID: 36115246 DOI: 10.1016/j.jenvman.2022.116173] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 08/03/2022] [Accepted: 09/01/2022] [Indexed: 06/15/2023]
Abstract
Fungus-algae symbiotic systems (FASS) are typically used to assist in the immobilization of algae and strengthen the adsorption of heavy metals. However, the adsorption behavior of the symbiotic system and the molecular regulation mechanism of extracellular proteins in the adsorption of heavy metals have not been reported in detail. In this study, a stable FCSS (fungus-cyanobacterium symbiotic system) was used to study Cd(II) adsorption behavior. The fixation efficiency of fungus to cyanobacterium reached more than 95% at pH7.0, 30 °C, 150 rpm, and a medium ratio of 100%. The biomass, chlorophyll content, and total fatty acid content of the symbiotic system were much higher than those of cyanobacterium and fungus alone. The photosynthetic fluorescence parameters showed that the presence of fungus enhanced the light tolerance of cyanobacterium. The original light energy conversion efficiency and potential activity of PSII were enhanced, indicating that symbiosis could promote the photosynthetic process of cyanobacterium. The Cd(II) adsorption efficiency can achieve 90%. The system maintained excellent adsorption after six adsorption cycles. Differential proteins were mainly enriched in areas such as metabolism, ABC transport system, and pressure response. Cd(II) stress promotes an increase in efflux proteins. Moreover, cadmium can be fixed as much as possible by secreting extracellular proteins, and the toxicity of cadmium to cells can be alleviated by regulating the metabolism of glutathione, reducing oxidative phosphorylation level, and reducing oxidative stress, thus improving the resistance to Cd(II). Meanwhile, the expression of enzymes involved in glycolysis and the pentose phosphate pathway was upregulated, while the expression of those in the TCA cycle was downregulated. The expression of substances related to PSI and PSII in the photosynthetic system and rubisco, a key enzyme in the Calvin cycle, was significantly upregulated, indicating that the glucose metabolism and photosynthetic pathways of the symbiotic system were involved in resistance to Cd toxicity. This revealed the response mechanism of the fungus-algal symbiotic system in the process of Cd adsorption, and also provided reference value for industrial application in water treatment.
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Affiliation(s)
- Junjun Wang
- School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
| | - Qinghua Tian
- School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
| | - Linlin Cui
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Jinju Cheng
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Hao Zhou
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Anan Peng
- School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China
| | - Guanzhou Qiu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Li Shen
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China.
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8
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Huang L, Li S, Zhou W, Gao J, Yin J, Wang Z, Li J. Cellular transport of uranium and its cytotoxicity effects on CHO-k1 cells. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 246:114166. [PMID: 36228352 DOI: 10.1016/j.ecoenv.2022.114166] [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: 06/30/2022] [Revised: 09/21/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
Uranium is a radioactive heavy metal and a significant public health concern; however, its associated underlying toxicological mechanisms remain largely unknown. In this work, the uptake and efflux processes of uranium in CHO-k1 cells were studied and the cytotoxicity effects were explored. It was found that both the uptake and efflux processes took place rapidly and half of the internalized uranium was expelled within 8 h. The uranium exposure caused a decrease of cell viability and adhesion ability in a dose-dependent manner and blocked the cell cycle at the G1 stage. In addition, gene expression analysis revealed relative changes in the transcription of metabolism related genes. Further studies revealed that the cytotoxicity of uranium could be alleviated by exposing cells to a lower temperature or by the addition of amantadine-HCl, an endocytosis inhibitor. Interestingly, after uranium exposure, needle-like precipitates were observed in both intracellular and extracellular regions. These findings collectively suggest that the cellular transport of uranium is a rapid process that disturbs cell metabolism and induces cytotoxicity, and this impact could be reduced by slowing down endocytic processes.
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Affiliation(s)
- Liqun Huang
- China Institute for Radiation Protection, Taiyuan 030006, China; Department of Radiation Safety, China Institute of Atomic Energy, Beijing 102413, China
| | - Shufang Li
- China Institute for Radiation Protection, Taiyuan 030006, China
| | - Wenhua Zhou
- China Institute for Radiation Protection, Taiyuan 030006, China
| | - Jie Gao
- China Institute for Radiation Protection, Taiyuan 030006, China
| | - Jingjing Yin
- China Institute for Radiation Protection, Taiyuan 030006, China
| | - Zhongwen Wang
- Department of Radiation Safety, China Institute of Atomic Energy, Beijing 102413, China
| | - Jianguo Li
- China Institute for Radiation Protection, Taiyuan 030006, China.
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Zhang L, Li J, Lai JL, Yang X, Zhang Y, Luo XG. Non-targeted metabolomics reveals the stress response of a cellulase-containing penicillium to uranium. J Environ Sci (China) 2022; 120:9-17. [PMID: 35623776 DOI: 10.1016/j.jes.2021.12.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 12/29/2021] [Accepted: 12/29/2021] [Indexed: 06/15/2023]
Abstract
Human industrial activities have caused environmental uranium (U) pollution, resulting in uranium(VI) had radiotoxicity and chemical toxicity. Here, a cellulase-producing Penicillium fungus was screened and characterized by X-ray fluorescence (XRF), and Fourier transform infrared reflection (FT-IR), as well as by GC/MS metabolomics analysis, to study the response to uranium(VI) stress. The biomass of Penicillium decreased after exposure to 100 mg/L U. Uranium combined with carboxyl groups, amino groups, and phosphate groups to form uranium mineralized deposits on the surface of this fungal strain. The α-activity concentration of uranium in the strain was 2.57×106 Bq/kg, and the β-activity concentration was 2.27×105 Bq/kg. Metabolomics analysis identified 118 different metabolites, as well as metabolic disruption of organic acids and derivatives. Further analysis showed that uranium significantly affected the metabolism of 9 amino acids in Penicillium. These amino acids were related to the TCA cycle and ABC transporter. At the same time, uranium exhibited nucleotide metabolism toxicity to Penicillium. This study provides an in-depth understanding of the uranium tolerance mechanism of Penicillium and provides a theoretical basis for Penicillium to degrade hyper-enriched plants.
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Affiliation(s)
- Li Zhang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Jie Li
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Jin-Long Lai
- Engineering Research Center of Biomass Materials, Ministry of Education of, SWUST, Mianyang 621010, China
| | - Xu Yang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Yu Zhang
- Engineering Research Center of Biomass Materials, Ministry of Education of, SWUST, Mianyang 621010, China.
| | - Xue-Gang Luo
- Engineering Research Center of Biomass Materials, Ministry of Education of, SWUST, Mianyang 621010, China
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10
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Biosorption behavior and biomineralization mechanism of low concentration uranium (VI) by pseudomonas fluorescens. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08551-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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11
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Mukherjee D, Pramanik K, Mandal S, Mandal NC. Augmented growth of Cd-stressed rice seedlings with the application of phytostimulating, root-colonizing, Cd-tolerant, leaf-endophytic fungi Colletotrichum spp. isolated from Eupatorium triplinerve. JOURNAL OF HAZARDOUS MATERIALS 2022; 438:129508. [PMID: 35999719 DOI: 10.1016/j.jhazmat.2022.129508] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 06/28/2022] [Accepted: 06/29/2022] [Indexed: 06/15/2023]
Abstract
The potential of plant growth-promoting endophytic fungi (PGPEF) in mycoremediation has received notable attention in recent years. Unlike other root-colonizing microorganisms, PGPEF colonization under Cadmium (Cd) stress is a less-revealed phenomenon. Among eighteen fungal isolates from the leaves of Eupatorium triplinerve, twelve were found as the species of Colletotrichum and remaining six belong to Fusarium based on phenotypic characterization. However, only two PGPEF isolates (ALE15 and ALE18) were finally selected based on possession of ACCD activity (~0.84 and 0.47 nM/µg protein/h, respectively) and higher Cd tolerance (1000 and 750 µg/mL, respectively). Moreover, the said isolates showed IAA production (~248 and 289 µg/mL), GA production (~86 and 88 AUs), phosphate solubilization (~165 and 256 µg/mL, respectively) under Cd stress. ALE18 strain was found to produce siderophore too. Molecular identification through sequencing of ITS region of both isolates confirmed their identity as species of Colletotrichum. Furthermore, FESEM-EDAX and AAS analyses supported their Cd bioaccumulation ability in mycelial cells that directly impacted to assist rice seedlings' (IR-36 cultivar) growth under Cd stress. Successful root colonization was also observed through FESEM and fluorescence microscopic studies. Finally, the detached leaf experiment with six economically important crops assured their applicability on field-scale as non-pathogenic PGPEF candidates.
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Affiliation(s)
- Debosmita Mukherjee
- Mycology and Plant Pathology Laboratory, Department of Botany, Visva-Bharati, Santiniketan 731235, West Bengal, India.
| | - Krishnendu Pramanik
- Mycology and Plant Pathology Laboratory, Department of Botany, Visva-Bharati, Santiniketan 731235, West Bengal, India.
| | - Subhrangshu Mandal
- Department of Earth and Environmental Science, University of Minnesota Twin Cities, Minneapolis, United States.
| | - Narayan Chandra Mandal
- Mycology and Plant Pathology Laboratory, Department of Botany, Visva-Bharati, Santiniketan 731235, West Bengal, India.
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12
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Gandhi TP, Sampath PV, Maliyekkal SM. A critical review of uranium contamination in groundwater: Treatment and sludge disposal. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 825:153947. [PMID: 35189244 DOI: 10.1016/j.scitotenv.2022.153947] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/24/2022] [Accepted: 02/13/2022] [Indexed: 06/14/2023]
Abstract
Dissolved uranium in groundwater at high concentrations is an emerging global threat to human and ecological health due to its radioactivity and chemical toxicity. Uranium can enter groundwater by geochemical reactions, natural deposition from minerals, mining, uranium ore processing, and spent fuel disposal. Although much progress has been made in uranium remediation in recent years, most published reviews on uranium treatment have focused on specific methods, particularly adsorption. This article systematically reviews the major treatment technologies, explains their mechanism and progress of uranium removal, and compares their performance under various environmental conditions. Of all treatment methods, adsorption has received much attention due to its ease of use and adaptability under various conditions. However, salinity and competition from other ions limit its application in actual field conditions. Biosorption and bioremediation are also promising methods due to their low-cost and chemical-free operation. Strong base anion exchange resins are more effective at typical groundwater pH conditions. Advanced oxidation processes like photocatalysis produce less sludge and are effective even at low uranium concentrations. Electrocoagulation shows significantly improved performance when organic ligands are added prior to treatment. The significant advantages of membrane filtration are high removal efficiency and the ability to recover uranium. While each technology has its merits and demerits, no single technology is entirely suitable under all conditions. One major area of concern with all technologies is the need to dispose of liquid and solid waste generated after treatment safely. Future research must focus on developing hybrid and state-of-the-art technologies for effective and sustainable uranium removal from groundwater. Developing holistic management strategies for uranium removal will hinge on understanding its speciation, mechanisms of fate and transport, and socio-economic conditions of the affected areas.
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Affiliation(s)
- T Pushparaj Gandhi
- Department of Civil and Environmental Engineering, Indian Institute of Technology Tirupati, Yerpedu, 517619, India
| | - Prasanna Venkatesh Sampath
- Department of Civil and Environmental Engineering, Indian Institute of Technology Tirupati, Yerpedu, 517619, India
| | - Shihabudheen M Maliyekkal
- Department of Civil and Environmental Engineering, Indian Institute of Technology Tirupati, Yerpedu, 517619, India.
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13
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Transformation of radionuclide occurrence state in uranium and strontium recycling by Saccharomyces cerevisiae. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08308-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Yu Q, Yuan Y, Feng L, Sun W, Lin K, Zhang J, Zhang Y, Wang H, Wang N, Peng Q. Highly efficient immobilization of environmental uranium contamination with Pseudomonas stutzeri by biosorption, biomineralization, and bioreduction. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127758. [PMID: 34801303 DOI: 10.1016/j.jhazmat.2021.127758] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 10/26/2021] [Accepted: 11/09/2021] [Indexed: 06/13/2023]
Abstract
Uranium is a heavy metal with both chemotoxicity and radiotoxicity. Due to the increasing consumption of uranium, the remediation of uranium contamination and recovery of uranium from non-conventional approach is highly needed. Microorganism exhibits high potential for immobilization of uranium. This study for the first time isolated a marine Pseudomonas stutzeri strain MRU-UE1 with high uranium immobilization capacity of 308.72 mg/g, which is attributed to the synergetic mechanisms of biosorption, biomineralization, and bioreduction. The uranium is found to be immobilized in forms of tetragonal chernikovite (H2(UO2)2(PO4)2·8H2O) by biomineralization and CaU(PO4)2 by bioreduction under aerobic environment, which is rarely observed and would broaden the application of this strain in aerobic condition. The protein, phosphate group, and carboxyl group are found to be essential for the biosorption of uranium. In response to the stress of uranium, the strain produces inorganic phosphate group, which transformed soluble uranyl ion to insoluble uranium-containing precipitates, and poly-β-hydroxybutyrate (PHB), which is observed for the first time during the interaction between microorganism and uranium. In summary, P. stutzeri strain MRU-UE1 would be a promising alternative for environmental uranium contamination remediation and uranium extraction from seawater.
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Affiliation(s)
- Qiuhan Yu
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China
| | - Yihui Yuan
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China.
| | - Lijuan Feng
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China
| | - Wenyan Sun
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China
| | - Ke Lin
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China
| | - Jiacheng Zhang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China
| | - Yibin Zhang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou 571158, PR China
| | - Hui Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China
| | - Ning Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China.
| | - Qin Peng
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou 571158, PR China.
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15
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Geng R, Yuan L, Shi L, Qiang S, Li Y, Liang J, Li P, Zheng G, Fan Q. New insights into the sorption of U(VI) on kaolinite and illite in the presence of Aspergillus niger. CHEMOSPHERE 2022; 288:132497. [PMID: 34626657 DOI: 10.1016/j.chemosphere.2021.132497] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 10/03/2021] [Accepted: 10/05/2021] [Indexed: 06/13/2023]
Abstract
The regulation effect of Aspergillus niger to the sorption behavior of U(VI) on kaolinite and illite was studied through investigating the enrichment of U(VI) on kaolinite-Aspergillus niger and illite-Aspergillus niger composites. Kaolinite- or illite-A. niger composites were prepared through co-culturation method. Results showed that U(VI) sorption on kaolinite and illite in different pH ranges could be attributed to ion exchange, outer-sphere complexes (OSCs), and inner-sphere complexes (ISCs), while only the ISCs on the bio-composites. Moreover, micro-spectroscopy tests revealed that U(VI) coordinate with phosphate, amide, and carboxyl groups on illite- and kaolinite- A. niger composites. X-ray photoelectron spectroscopy (XPS) further found that U(VI) was partly reduced to non-crystalline U(IV) by A. niger in the bio-composites, occurring as phosphate coordination polymers or biomass-associated monomers. The findings herein provide further insight into the immobilization and migration of uranium in environments.
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Affiliation(s)
- Rongyue Geng
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Longmiao Yuan
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Leiping Shi
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shirong Qiang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Yuqiang Li
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
| | - Jianjun Liang
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China
| | - Ping Li
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China
| | - Guodong Zheng
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China
| | - Qiaohui Fan
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China.
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16
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Zeng L, Huang J, Feng P, Zhao X, Si Z, Long X, Cheng Q, Yi Y. Transcriptomic analysis of formic acid stress response in Saccharomyces cerevisiae. World J Microbiol Biotechnol 2022; 38:34. [PMID: 34989900 DOI: 10.1007/s11274-021-03222-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 12/26/2021] [Indexed: 12/23/2022]
Abstract
Formic acid is a representative small molecule acid in lignocellulosic hydrolysate that can inhibit the growth of Saccharomyces cerevisiae cells during alcohol fermentation. However, the mechanism of formic acid cytotoxicity remains largely unknown. In this study, RNA-Seq technology was used to study the response of S. cerevisiae to formic acid stress at the transcriptional level. Scanning electron microscopy and Fourier transform infrared spectroscopy were conducted to observe the surface morphology of yeast cells. A total of 1504 genes were identified as being differentially expressed, with 797 upregulated and 707 downregulated genes. Transcriptomic analysis showed that most genes related to glycolysis, glycogen synthesis, protein degradation, the cell cycle, the MAPK signaling pathway, and redox regulation were significantly induced under formic acid stress and were involved in protein translation and synthesis amino acid synthesis genes were significantly suppressed. Formic acid stress can induce oxidative stress, inhibit protein biosynthesis, cause cells to undergo autophagy, and activate the intracellular metabolic pathways of energy production. The increase of glycogen and the decrease of energy consumption metabolism may be important in the adaptation of S. cerevisiae to formic acid. In addition, formic acid can also induce sexual reproduction and spore formation. This study through transcriptome analysis has preliminarily reveal the molecular response mechanism of S. cerevisiae to formic acid stress and has provided a basis for further research on methods used to improve the tolerance to cell inhibitors in lignocellulose hydrolysate.
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Affiliation(s)
- Lingjie Zeng
- College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Liuzhou, 545006, China
| | - Jinxiang Huang
- College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Liuzhou, 545006, China
| | - Pixue Feng
- College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Liuzhou, 545006, China
| | - Xuemei Zhao
- College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Liuzhou, 545006, China
| | - Zaiyong Si
- College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Liuzhou, 545006, China
| | - Xiufeng Long
- College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Liuzhou, 545006, China
| | - Qianwei Cheng
- College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Liuzhou, 545006, China
| | - Yi Yi
- College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China.
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Liuzhou, 545006, China.
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17
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Fan M, Wang X, Song Q, Zhang L, Ren B, Yang X. Review of biomass-based materials for uranium adsorption. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-08003-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Li S, Zhu Q, Luo J, Shu Y, Guo K, Xie J, Xiao F, He S. Application Progress of Deinococcus radiodurans in Biological Treatment of Radioactive Uranium-Containing Wastewater. Indian J Microbiol 2021; 61:417-426. [PMID: 34744197 DOI: 10.1007/s12088-021-00969-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 08/03/2021] [Indexed: 02/04/2023] Open
Abstract
Radioactive uranium wastewater contains a large amount of radionuclide uranium and other heavy metal ions. The radioactive uranium wastewater discharged into the environment will not only pollute the natural environment, but also threat human health. Therefore, the treatment of radioactive uranium wastewater is a current research focus for many researchers. The treatment in radioactive uranium wastewater mainly includes physical, chemical and biological methods. At present, the using of biological treatment to treat uranium in radioactive uranium wastewater has been gradually shown its superiority and advantages. Deinococcus radiodurans is a famous microorganism with the most radiation resistant to ionizing radiation in the world, and can also resist various other extreme pressures. D. radiodurans can be directly used for the adsorption of uranium in radioactive waste water, and it can also transform other functional genes into D. radiodurans to construct genetically engineered bacteria, and then applied to the treatment of radioactive uranium containing wastewater. Radionuclides uranium in radioactive uranium-containing wastewater treated by D. radiodurans involves a lot of mechanisms. This article reviews currently the application of D. radiodurans that directly or construct genetically engineered bacteria in the treatment of radioactive uranium wastewater and discusses the mechanism of D. radiodurans in bioremediation of uranium. The application of constructing an engineered bacteria of D. radiodurans with powerful functions in uranium-containing wastewater is prospected.
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Affiliation(s)
- Shanshan Li
- School of Public Health, University of South China, Hengyang, 421001 Hunan China
| | - Qiqi Zhu
- School of Public Health, University of South China, Hengyang, 421001 Hunan China
| | - Jiaqi Luo
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001 Hunan China
| | - Yangzhen Shu
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001 Hunan China
| | - Kexin Guo
- School of Public Health, University of South China, Hengyang, 421001 Hunan China
| | - Jingxi Xie
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001 Hunan China
| | - Fangzhu Xiao
- School of Public Health, University of South China, Hengyang, 421001 Hunan China
| | - Shuya He
- School of Public Health, University of South China, Hengyang, 421001 Hunan China
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19
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Zhong J, Hu X, Liu X, Cui X, Lv Y, Tang C, Zhang M, Li H, Qiu L, Sun W. Isolation and Identification of Uranium Tolerant Phosphate-Solubilizing Bacillus spp. and Their Synergistic Strategies to U(VI) Immobilization. Front Microbiol 2021; 12:676391. [PMID: 34326819 PMCID: PMC8313988 DOI: 10.3389/fmicb.2021.676391] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 05/03/2021] [Indexed: 11/13/2022] Open
Abstract
The remediation of uranium (U) through phosphate-solubilizing bacteria (PSB) is an emerging technique as well as an interesting phenomenon for transforming mobile U into stable minerals in the environment. While studies are well needed for in-depth understanding of the mechanism of U(VI) immobilization by PSB. In this study, two PSB were isolated from a U-tailing repository site. These bacterial strains (ZJ-1 and ZJ-3) were identified as Bacillus spp. by the sequence analysis of 16S ribosomal RNA (rRNA) genes. Incubation of PSB in liquid medium showed that the isolate ZJ-3 could solubilize more than 230 mg L-1 P from glycerol-3-phosphate and simultaneously removed over 70% of 50 mg L-1 U(VI) within 1 h. During this process, the rapid appearance of yellow precipitates was observed. The microscopic and spectroscopic analysis demonstrated that the precipitates were associated with U-phosphate compound in the form of saleeite-like substances. Besides, scanning electron microscopy coupled with energy-dispersive X-ray (SEM-EDS) and Fourier transform infrared spectroscopy (FTIR) analysis of the precipitates confirmed that the extracellular polymeric substances (EPS) might also play a key role in U sequestration. Furthermore, SEM and FTIR analysis revealed that part of U(VI) was adsorbed on the bacterial surface through cellular phosphate, hydroxy, carboxyl, and amide groups. This study provides new insights into the synergistic strategies enhancing U immobilization rates by Bacillus spp. that uses glycerol-3-phosphate as the phosphorus source, the process of which contributes to harmful pollutant biodegradation.
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Affiliation(s)
- Juan Zhong
- GRINM Resources and Environment Tech. Co., Ltd., Beijing, China.,National Engineering Laboratory of Biohydrometallurgy, GRINM Group Co., Ltd., Beijing, China.,GRIMAT Engineering Institute Co., Ltd., Beijing, China
| | - Xuewu Hu
- GRINM Resources and Environment Tech. Co., Ltd., Beijing, China.,National Engineering Laboratory of Biohydrometallurgy, GRINM Group Co., Ltd., Beijing, China.,School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, China
| | - Xingyu Liu
- GRINM Resources and Environment Tech. Co., Ltd., Beijing, China.,National Engineering Laboratory of Biohydrometallurgy, GRINM Group Co., Ltd., Beijing, China
| | - Xinglan Cui
- GRINM Resources and Environment Tech. Co., Ltd., Beijing, China.,National Engineering Laboratory of Biohydrometallurgy, GRINM Group Co., Ltd., Beijing, China
| | - Ying Lv
- GRINM Resources and Environment Tech. Co., Ltd., Beijing, China.,National Engineering Laboratory of Biohydrometallurgy, GRINM Group Co., Ltd., Beijing, China
| | - Chuiyun Tang
- GRINM Resources and Environment Tech. Co., Ltd., Beijing, China.,National Engineering Laboratory of Biohydrometallurgy, GRINM Group Co., Ltd., Beijing, China
| | - Mingjiang Zhang
- GRINM Resources and Environment Tech. Co., Ltd., Beijing, China.,National Engineering Laboratory of Biohydrometallurgy, GRINM Group Co., Ltd., Beijing, China
| | - Hongxia Li
- GRINM Resources and Environment Tech. Co., Ltd., Beijing, China.,National Engineering Laboratory of Biohydrometallurgy, GRINM Group Co., Ltd., Beijing, China
| | - Lang Qiu
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou, China
| | - Weimin Sun
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou, China
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20
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Chen X, Tian Z, Cheng H, Xu G, Zhou H. Adsorption process and mechanism of heavy metal ions by different components of cells, using yeast ( Pichia pastoris) and Cu 2+ as biosorption models. RSC Adv 2021; 11:17080-17091. [PMID: 35479686 PMCID: PMC9033084 DOI: 10.1039/d0ra09744f] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 05/01/2021] [Indexed: 01/14/2023] Open
Abstract
Microbial biomass has been recognized as an essential biosorbent to remove heavy metal ions, but the biosorption process and mechanism of different components of microbial cells have not been elucidated. In present study, Pichia pastoris X33 and Cu2+ was used as a biosorption model to reveal the biosorption process and mechanism of different components of microbial cells. For the biosorption of whole cells, the maximum removal efficiency was 41.1%, and the adsorption capacity was 6.2 mg g−1. TEM-EDX analysis proved the existence of Cu2+ on the cell surface and cytoplasm. The maximum Cu2+ removal efficiency of the cell wall, cell membrane and cytoplasm were 21.2%, 20.7% and 18.5%, respectively. The optimum pH of Cu2+ biosorption of the P. pastoris cell, cell wall, cell membrane and cytoplasm was 6. Moreover, the maximum adsorption capacity of the cell, cell wall, cell membrane and cytoplasm was 16.13, 11.53, 10.97 and 8.87 mg g−1, respectively. The maximum removal efficiencies of P. pastoris biomass treated with proteinase K and P. pastoris biomass treated with β-mannanase were 18.1% and 28.2%, respectively. The maximum removal efficiencies of mannan and glucan were 34% and 12%, respectively. The FTIR spectra showed that the amino group (N–H), hydroxyl (O–H), carbon oxygen bond (C–O), –CH, C–N and carbonyl group (C
Created by potrace 1.16, written by Peter Selinger 2001-2019
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O) of a ketone or aldehyde may interact with Cu2+. Thus, our work provides guidance for further understanding the effect of different cell components on biosorption. The Cu2+ first bound to the outer mannan and finally entered the cytoplasm. During the whole adsorption process, the number of adsorption sites in the outer and middle cell walls was the largest, and then gradually decreased. ![]()
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Affiliation(s)
- Xinggang Chen
- School of Minerals Processing and Bioengineering, Central South University Changsha 410083 Hunan China .,Key Laboratory of Biometallurgy of Ministry of Education Changsha 410083 China
| | - Zhuang Tian
- School of Minerals Processing and Bioengineering, Central South University Changsha 410083 Hunan China .,Key Laboratory of Biometallurgy of Ministry of Education Changsha 410083 China
| | - Haina Cheng
- School of Minerals Processing and Bioengineering, Central South University Changsha 410083 Hunan China .,Key Laboratory of Biometallurgy of Ministry of Education Changsha 410083 China
| | - Gang Xu
- Hunan Flag Bio-Tech Co., Ltd Changsha Hunan 410083 China
| | - Hongbo Zhou
- School of Minerals Processing and Bioengineering, Central South University Changsha 410083 Hunan China .,Key Laboratory of Biometallurgy of Ministry of Education Changsha 410083 China
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21
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Zhang M, Wen Y, Luo X, Wang X, Li J, Liu A, He L, Chen S, Ao X, Yang Y, Zou L, Liu S. Characterization, mechanism of cypermethrin biosorption by Saccharomyces cerevisiae strains YS81 and HP and removal of cypermethrin from apple and cucumber juices by inactive cells. JOURNAL OF HAZARDOUS MATERIALS 2021; 407:124350. [PMID: 33176957 DOI: 10.1016/j.jhazmat.2020.124350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 10/15/2020] [Accepted: 10/19/2020] [Indexed: 06/11/2023]
Abstract
Cypermethrin is a common food contaminant and environmental pollutant that cause health threats to animals and humans. In this study, the characterization, mechanism, and application of cypermethrin removal by Saccharomyces cerevisiae were investigated. The binding of cypermethrin by the strains S. cerevisiae YS81 and HP was rapid and reached equilibrium at 2-8 h. The removal efficiency was dependent on incubation temperature and yeast concentration, whereas cypermethrin binding was not affected by pH. Heat and acid treatments enhanced the binding ability. Both strains survived in simulated digestion juices and removed cypermethrin effectively under simulated gastrointestinal conditions. Among the strains tested, the YS81 strain was the better candidate for cypermethrin concentration reduction. For the two S. cerevisiae strains, the biosorption kinetics and isotherm followed the pseudo-second-order model and Langmuir model well. The cell walls and the protoplasts were the main yeast cell components involved in cypermethrin binding. Fourier transformed infrared spectroscopy analysis revealed that -OH, -NH, -C-N, -COO-, and -C-O played a major role in binding cypermethrin. Inactive cells effectively removed cypermethrin from apple and cucumber juices and did not affect the physico-chemical properties. Therefore, S. cerevisiae strains YS81 and HP may be used for cypermethrin reduction in food or feed.
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Affiliation(s)
- Mengmei Zhang
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China
| | - Yunling Wen
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China
| | - Xiaoli Luo
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China
| | - Xingjie Wang
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China
| | - Jianlong Li
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China
| | - Aiping Liu
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China
| | - Li He
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China
| | - Shujuan Chen
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China
| | - Xiaolin Ao
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China; Institute of Food Processing and Safety, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China
| | - Yong Yang
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China; Institute of Food Processing and Safety, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China
| | - Likou Zou
- College of Resources, Sichuan Agricultural University, Chengdu, Sichuan 611130, People's Republic of China
| | - Shuliang Liu
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China; Institute of Food Processing and Safety, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China.
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22
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Kolhe N, Kulkarni A, Zinjarde S, Acharya C. Transcriptome Response of the Tropical Marine Yeast Yarrowia lipolytica on Exposure to Uranium. Curr Microbiol 2021; 78:2033-2043. [PMID: 33772621 DOI: 10.1007/s00284-021-02459-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 03/11/2021] [Indexed: 11/30/2022]
Abstract
In our earlier investigation, we reported the consequences of uranium (U)-induced oxidative stress and cellular defense mechanisms alleviating uranium toxicity in the marine yeast Yarrowia lipolytica NCIM 3589. However, there is lack of information on stress response towards uranium toxicity at molecular level in this organism. To gain an insight on this, transcriptional response of Y. lipolytica after exposure to 50 µM uranium was investigated by RNA sequencing at the global level in this study. The de novo transcriptome analysis (in triplicates) revealed 56 differentially expressed genes with significant up-regulation and down-regulation of 33 and 23 transcripts, respectively, in U-exposed yeast cells as compared to the control, U-unexposed cells. Highly up-regulated genes under U-treated condition were identified to be primarily involved in transport, DNA damage repair and oxidative stress. The major reaction of Y. lipolytica to uranium exposure was the activation of oxidative stress response mechanisms to protect the important biomolecules of the cells. On the other hand, genes involved in cell wall and cell cycle regulation were significantly down-regulated. Overall, the transcriptional profiling by RNA sequencing to stress-inducing concentration of uranium sheds light on the various responses of Y. lipolytica for coping with uranium toxicity, providing a foundation for understanding the molecular interactions between uranium and this marine yeast.
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Affiliation(s)
- Nilesh Kolhe
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, 411007, India.,Molecular Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - Abhijeet Kulkarni
- Bioinformatics Centre, Savitribai Phule Pune University, Pune, 411007, India
| | - Smita Zinjarde
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, 411007, India.
| | - Celin Acharya
- Molecular Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India. .,Homi Bhabha National Institute, Anushakti Nagar, Trombay, Mumbai, 400094, India.
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Enhancement of U(VI) biosorption by Trichoderma harzianum mutant obtained by a cold atmospheric plasma jet. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07615-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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24
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Kolhe N, Zinjarde S, Acharya C. Removal of uranium by immobilized biomass of a tropical marine yeast Yarrowia lipolytica. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2020; 223-224:106419. [PMID: 32950912 DOI: 10.1016/j.jenvrad.2020.106419] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/08/2020] [Accepted: 09/03/2020] [Indexed: 06/11/2023]
Abstract
A marine yeast, Yarrowia lipolytica isolated from an oil polluted sea water and shown earlier to sequester dissolved uranium (U) at pH 7.5, was utilized in the present study for developing an immobilized-cell process for U removal from aqueous solutions under batch and continuous flow through systems. In batch system, optimum biosorption conditions for U removal were assessed by investigating the effects of biomass dose, initial U concentration, contact time and pH of solution using Y. lipolytica cells immobilized in calcium alginate beads. Appreciable uranium-binding capabilities over a wide pH range (3-9) were observed with the alginate beads bearing yeast cells. Out of Langmuir and Freundlich models employed for describing the sorption equilibrium data under batch mode, uranyl adsorption followed Langmuir approach with satisfactory correlation coefficient higher than 0.9. Uranyl adsorption kinetics by Y. lipolytica entrapped in alginate beads was best described by the pseudo-second-order model. While the environmental scanning electron microscopy established the immobilization and the uniform distribution of Y. lipolytica cells in the alginate beads, the Energy Dispersive X-ray spectroscopy analysis confirmed the deposition of U in the beads following their exposure to uranyl solution. Fixed bed flow-through column comprising of Y. lipolytica biomass immobilized in polyacrylamide matrix displayed high efficacy for continuous removal of uranium at pH 7.5 up to five adsorption-desorption cycles. Adsorbed U by immobilized cells could be significantly desorbed using 0.1 N HCl. Overall, our results present the superior efficiency of immobilized Y. lipolytica biomass for U removal using batch and regenerative approaches.
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Affiliation(s)
- Nilesh Kolhe
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune 411007, India; Molecular Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Smita Zinjarde
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune 411007, India; Department of Microbiology, Savitribai Phule Pune University, Pune 411007, India
| | - Celin Acharya
- Molecular Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India; Homi Bhabha National Institute, Anushakti Nagar, Trombay, Mumbai 400094, India.
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25
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Cuevas-González PF, González-Córdova AF, Vallejo-Cordoba B, Aguilar-Toalá JE, Hall FG, Urbizo-Reyes UC, Liceaga AM, Hernandez-Mendoza A, García HS. Protective role of lactic acid bacteria and yeasts as dietary carcinogen-binding agents - a review. Crit Rev Food Sci Nutr 2020; 62:160-180. [PMID: 32901514 DOI: 10.1080/10408398.2020.1813685] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The importance of food contaminants in the link between diet and cancer has been widely demonstrated. Therefore, different physical and chemical strategies for the control of human exposure to such dietary carcinogens has been explored; however, most of these strategies are complex, costly, and have low efficiency which limited their applications. Hence, microbiological methods have been receiving more attention. Recent in vitro and in vivo studies have indicated that lactic acid bacteria (LAB) and yeast may act as dietary carcinogen-binding agents. This review describes the promising protective role of strains belonging mainly to the Lactobacillus, Bifidobacterium and Saccharomyces genera by acting as dietary carcinogen-binding agents. This property suggests that these microorganisms may have a protective role by reducing the bioaccessibility of dietary carcinogens, thereby decreasing their toxic effects. The mechanisms by which the binding process takes place have not been completely elucidated; thus, the possible underlying mechanisms and factors influencing carcinogens-binding will be addressed.
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Affiliation(s)
- P F Cuevas-González
- Laboratorio de Química y Biotecnología de Productos Lácteos, Centro de Investigación en Alimentación y Desarrollo A.C. (CIAD), Carretera Gustavo Enrique Astiazarán Rosas, Hermosillo, Mexico
| | - A F González-Córdova
- Laboratorio de Química y Biotecnología de Productos Lácteos, Centro de Investigación en Alimentación y Desarrollo A.C. (CIAD), Carretera Gustavo Enrique Astiazarán Rosas, Hermosillo, Mexico
| | - B Vallejo-Cordoba
- Laboratorio de Química y Biotecnología de Productos Lácteos, Centro de Investigación en Alimentación y Desarrollo A.C. (CIAD), Carretera Gustavo Enrique Astiazarán Rosas, Hermosillo, Mexico
| | - J E Aguilar-Toalá
- Laboratorio de Química y Biotecnología de Productos Lácteos, Centro de Investigación en Alimentación y Desarrollo A.C. (CIAD), Carretera Gustavo Enrique Astiazarán Rosas, Hermosillo, Mexico
| | - F G Hall
- Department of Food Science, Purdue University, West Lafayette, Indiana, United States
| | - U C Urbizo-Reyes
- Department of Food Science, Purdue University, West Lafayette, Indiana, United States
| | - A M Liceaga
- Department of Food Science, Purdue University, West Lafayette, Indiana, United States
| | - A Hernandez-Mendoza
- Laboratorio de Química y Biotecnología de Productos Lácteos, Centro de Investigación en Alimentación y Desarrollo A.C. (CIAD), Carretera Gustavo Enrique Astiazarán Rosas, Hermosillo, Mexico
| | - H S García
- Tecnológico Nacional de México, Instituto Tecnológico de Veracruz, UNIDA, Veracruz, Mexico
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Zhang J, Chen X, Zhou J, Luo X. Uranium biosorption mechanism model of protonated Saccharomyces cerevisiae. JOURNAL OF HAZARDOUS MATERIALS 2020; 385:121588. [PMID: 31744728 DOI: 10.1016/j.jhazmat.2019.121588] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 09/22/2019] [Accepted: 10/31/2019] [Indexed: 06/10/2023]
Abstract
Further understanding absorption uranium mechanism of the regenerational biosorbent is very interesting in application of the biosorbent. The regeneration adsorbent of Saccharomyces cerevisiae biomass was made by hydrochloric acid. Using it to absorb uranium at low constant pH(2.50), accompanied with proton releasing the ratio almost 1:2 which is to be analyzed in this paper. The type and amount of functional groups in the biomass such as carboxyl, amino, phosphoryl were determined by Potentiometric titrations and FTIR analysis. Chemical modification showed that the contribution of functional groups to uranium adsorption was carboxyl, phosphoryl and amino in turn. Analysis of SEM-EDX and staining microscopy showed that uranium on the surface of cells did not exist in the form of precipitation at lower pH 2.98, but at higher pH 4.52. The effects of phosphorus release and pH on uranium species was analyzed by MINTEQ software 3.0. Based on the above boundary conditions of the model construction, a multi-site of functional groups model equation of ion exchange absorption mechanism was built in which the final uranium ion concentration and pH as functions. It could well describe the exchange equilibrium of proton with uranium ion at pH2.50 to pH4.00.
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Affiliation(s)
- Jianguo Zhang
- School of Environmental and Resources, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China; School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China; National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China; State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, PR China
| | - Xiaoming Chen
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China; National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China; State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, PR China
| | - Jian Zhou
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China; National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China.
| | - Xuegang Luo
- School of Environmental and Resources, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China; School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China; National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China; State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, PR China.
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27
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Chen C, Hu J, Wang J. Biosorption of uranium by immobilized Saccharomyces cerevisiae. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2020; 213:106158. [PMID: 31983440 DOI: 10.1016/j.jenvrad.2020.106158] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/31/2019] [Accepted: 01/02/2020] [Indexed: 06/10/2023]
Abstract
A novel biosorbent was prepared and applied for the removal of uranium from aqueous solution. A new immobilization method was studied and used to embed living yeast cells of Saccharomyces cerevisiae (2% w/v) by sodium sulfate (0.5 mol/L) based on saturated boric acid-alginate calcium cross-linking method. The swelling ratio, hydraulic and chemical stability and bioactivity of immobilized microbial cells were examined. Their ultra-microstructure and property were observed by SEM, TEM and FTIR techniques. The influencing factors, such as contact time, initial uranium concentration, and initial pH were investigated. The adsorption capacity of biosorbent increased from 0.75 to 113.4 μmol/g when the equilibrium concentration of U was 0.9, and 43.9 μmol/L, respectively. U adsorption followed pseudo first-order kinetic model. SEM-EDS and TEM-EDS observation indicated that uranium was adsorbed both on the surface and the inner parts of the biosorbent. FTIR and the XPS results confirmed the role of oxygen in capturing uranium from aqueous solution. XPS analysis showed that the mixture of U (VI) and U (IV) existed on the surface of biosorbent, which evidenced that uranium was microbiologically reduced.
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Affiliation(s)
- Can Chen
- Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing, 100084, PR China
| | - Jun Hu
- Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing, 100084, PR China
| | - Jianlong Wang
- Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing, 100084, PR China; Beijing Key Laboratory of Radioactive Waste Treatment, Tsinghua University, Beijing, 100084, PR China.
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28
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Xie S, Xiao X, Tan W, Lv J, Deng Q, Fang Q. Influence of Leifsonia sp. on U(VI) removal efficiency and the Fe-U precipitates by zero-valent iron. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:5584-5594. [PMID: 31853852 DOI: 10.1007/s11356-019-07306-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 12/05/2019] [Indexed: 06/10/2023]
Abstract
Zero-valent iron (ZVI) has been widely applied to the remediation of uranium (U)-contaminated water. Notably, indigenous bacteria may possess potential positive or unfavorable influence on the mechanism and stability of Fe-U precipitates. However, the focus of the researches in this field has mainly been on physical and/or chemical aspects. In this study, batch experiments were conducted to explore the effects of an indigenous bacterium (Leifsonia sp.) on Fe-U precipitates and the corresponding removal efficiency by ZVI under different environmental factors. The results showed that the removal rate and capacity of U(VI) was significantly inhibited and decreased by ZVI when the pH increased to near-neutral level (pH = 6~8). However, in the ZVI + Leifsonia sp. coexistence system, the U(VI) removal efficiency were maintained at high levels (over 90%) within the experimental scope (pH = 3~8). This revealed that Leifsonia sp. had a synergistic effect on U(VI) remove by ZVI. According to scanning electron microscope and energy dispersive X-ray detector (SEM-EDX) analysis, dense scaly uranium-phosphate precipitation was observed on ZVI + Leifsonia sp. surface. The X-photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) analysis indicated that Leifsonia sp. facilitated the generation of U(VI)-phosphates precipitates. The X-ray diffraction (XRD) analyses further revealed that new substances, such as (Fe(II)Fe(III)2(PO4)2(OH)2), Fe(II)(UO2)2(PO4)2·8H2O, Fe(II)Fe(III)5(PO4)4(OH)2·4H2O, etc., were produced in the coexisting system of ZVI and Leifsonia sp. This study provides new insights on the feasibility and validity of site application of ZVI to U(VI)-contaminated subsurface water in situ. Graphical abstract.
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Affiliation(s)
- Shuibo Xie
- Key Discipline Laboratory for National Defense of Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
| | - Xue Xiao
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China
| | - Wenfa Tan
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China.
- Hengyang Key Laboratory of Soil Pollution Control and Remediation, University of South China, Hengyang, 421001, China.
| | - Junwen Lv
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China
| | - Qinwen Deng
- Hengyang Key Laboratory of Soil Pollution Control and Remediation, University of South China, Hengyang, 421001, China
| | - Qi Fang
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China
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29
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Kolhe N, Zinjarde S, Acharya C. Impact of uranium exposure on marine yeast, Yarrowia lipolytica: Insights into the yeast strategies to withstand uranium stress. JOURNAL OF HAZARDOUS MATERIALS 2020; 381:121226. [PMID: 31557712 DOI: 10.1016/j.jhazmat.2019.121226] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 08/17/2019] [Accepted: 09/12/2019] [Indexed: 06/10/2023]
Abstract
A marine yeast, Yarrowia lipolytica, was evaluated for morphological, physiological and biochemical responses towards uranium (U) exposure at pH 7.5. The yeast revealed biphasic U binding - a rapid biosorption resulting in ∼35% U binding within 15-30 min followed by a slow biomineralization process, binding up to ∼45.5% U by 24 h on exposure to 50 μM of uranyl carbonate. Scanning electron microscopy coupled with Energy Dispersive X-ray spectroscopy analysis of 24 h U challenged cells revealed the deposition of uranyl precipitates due to biomineralization. The loss of intracellular structures together with surface and subcellular localization of uranyl precipitates in 24 h U exposed cells were visualized by transmission electron microscopy. Cells treated with 50 μM U exhibited membrane permeabilization which was higher at 200 μM U. Enhanced reactive oxygen species (ROS) accumulation and lipid peroxidation, transient RNA degradation and protein oxidation were observed in U exposed cells. High superoxide dismutase levels coupled with uranium binding and bioprecipitation possibly helped in counteracting U stress in 50 μM U treated cells. Resistance to U toxicity apparently developed under prolonged uranyl (50 μM) incubations. However, cells could not cope up with toxicity at 200 μM U due to impairment of resistance mechanisms.
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Affiliation(s)
- Nilesh Kolhe
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune 411007, India; Molecular Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - Smita Zinjarde
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune 411007, India; Department of Microbiology, Savitribai Phule Pune University, Pune, 411007, India
| | - Celin Acharya
- Molecular Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India; Homi Bhabha National Institute, Anushakti Nagar, Trombay, Mumbai, 400094, India.
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30
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Keerthisinghe TP, Nguyen LN, Kwon EE, Oh S. Antiseptic chlorhexidine in activated sludge: Biosorption, antimicrobial susceptibility, and alteration of community structure. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 237:629-635. [PMID: 30851591 DOI: 10.1016/j.jenvman.2019.02.043] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 12/13/2018] [Accepted: 02/07/2019] [Indexed: 06/09/2023]
Abstract
Chlorhexidine (CHX) is a broad-spectrum antimicrobial, which may pose environmental health risks. This study examined the removal potential and the mechanisms regulating the fate of CHX in activated sludge (AS). Bioreactors inoculated with AS removed 74 ± 8% and 81 ± 6% of CHX at steady state while receiving 0.5 and 1 mg/L CHX, respectively. Analysis of the removal pathways showed that biosorption, rather than biological breakdown or other abiotic losses, largely (>70%) regulated the removal of CHX. 16S rRNA gene-based analysis revealed that CHX selected for Luteolibacter (4.3-10.1-fold change) and Runella (6.2-14.1-fold change) with potential multi-drug resistance mechanisms (e.g., efflux pumps). In contrast, it significantly reduced core members (Comamonadaceae and Flavobacteriaceae) of AS, playing a key role in contaminant removal and floc formation directly associated with the performance of WWTPs (e.g., wastewater effluent quality). Antimicrobial susceptibility testing showed that 0.4-1.3 mg/L of CHX can be sublethal to AS. Our work provided new insights into the fate of CHX in urban waste streams and the potential toxicity and effects on the structure and function of AS, which has practical implications for the management of biological WWTPs treating CHX.
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Affiliation(s)
- Tharushi P Keerthisinghe
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Ave, Singapore, 639798, Singapore
| | - Luong N Nguyen
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Ave, Singapore, 639798, Singapore
| | - Eilhann E Kwon
- Department of Environment and Energy, Sejong University, Seoul 05006, Republic of Korea
| | - Seungdae Oh
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Ave, Singapore, 639798, Singapore; Department of Civil Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 17104, Republic of Korea.
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31
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He D, Tan N, Luo X, Yang X, Ji K, Han J, Chen C, Liu Y. Preparation, uranium (VI) absorption and reuseability of marine fungus mycelium modified by the bis-amidoxime-based groups. RADIOCHIM ACTA 2019. [DOI: 10.1515/ract-2018-3063] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Abstract
Bis-amidoxime-based claw-like-functionalized marine fungus material (ZZF51-GPTS-DCDA-AM) was prepared for study to absorb the low concentration uranium (VI) from aqueous solution. A series of characterization methods such as SEM, TGA and FT-IR were applied for the functionalized materials before and after modification and adsorption. The experimental results suggested that the amidoxime groups were successfully grafted onto the surface of mycelium powder and provided the special binding sites for the absorption of uranium (VI). In the absorption research, uranium (VI) initial concentration, pH and equilibrium time were optimized as 40 mg L−1, 6.0, and 110 min by L4
3 orthogonal experiment, respectively, and the maximum absorption capacity of the prepared material was 370.85 mg g−1 under the optimum batch conditions. After five cycling process, the desorption rate and regeneration efficiency of the modified mycelium were found to be 80.29 % and 94.51 %, respectively, which indicated that the material had an adequately high reusability property as a cleanup tool. The well known Langmuir and Freundlich isotherm adsorption model fitting found that the modified materials had both monolayer and bilayer adsorption to uranium (VI) ions. Simultaneously, the pseudo-second-order model was better to illustrated the adsorption kinetics process. The enhanced adsorption capacity of uranium (VI) by the modified fungus materials over raw biomass was mainly owing to the strong chelation of amidoxime groups and uranium (VI) ions.
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Affiliation(s)
- Dianxiong He
- School of Chemistry and Chemical Engineering, University of South China , Hengyang 421001 , Hunan Province , P.R. China
| | - Ni Tan
- School of Chemistry and Chemical Engineering, University of South China , Hengyang 421001 , Hunan Province , P.R. China
| | - Xiaomei Luo
- School of Chemistry and Chemical Engineering, University of South China , Hengyang 421001 , Hunan Province , P.R. China
| | - Xuechun Yang
- School of Chemistry and Chemical Engineering, University of South China , Hengyang 421001 , Hunan Province , P.R. China
| | - Kang Ji
- School of Chemistry and Chemical Engineering, University of South China , Hengyang 421001 , Hunan Province , P.R. China
| | - Jingwen Han
- School of Chemistry and Chemical Engineering, University of South China , Hengyang 421001 , Hunan Province , P.R. China
| | - Can Chen
- School of Chemistry and Chemical Engineering, University of South China , Hengyang 421001 , Hunan Province , P.R. China
| | - Yaqing Liu
- School of Chemistry and Chemical Engineering, University of South China , Hengyang 421001 , Hunan Province , P.R. China
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32
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Zhang Z, Liu H, Liu L, Song W, Sun Y. Effect of Staphylococcus epidermidis on U(VI) sequestration by Al-goethite. JOURNAL OF HAZARDOUS MATERIALS 2019; 368:52-62. [PMID: 30665108 DOI: 10.1016/j.jhazmat.2019.01.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/08/2019] [Accepted: 01/10/2019] [Indexed: 06/09/2023]
Abstract
Effect of Staphylococcus epidermidis (S. epidermidis) on U(VI) sequestration by Al-goethite were conducted under different geologic conditions. The batch experiments showed that S. epidermidis significantly enhanced the adsorption rates of U(VI) at pH < 9.0 due to the additional metal binding sites. The maximum adsorption capacities of U(VI) on Al-goethite and Al-goethite +S. epidermidis at pH 4.0 and 310 K were calculated from Langmuir equation to be 13.16 and 47.86 mg/g, respectively. The decreased adsorption of U(VI) on Al-goethite+ S. epidermidis at high carbonate and pH conditions were primarily driven by the electrostatic repulsion between negatively charged U(VI)-carbonate complexes and the negatively charged adsorbents. According to XPS analysis, the adsorbed U(VI) can be reduced to U(IV) by S. epidermidis, whereas inhibited reduction of U(VI) on Al-goethite + S. epidermidis at high pH could be attributed to the complexation of structural Fe(III) with the oxygen-containing functional groups of S. epidermidis. FT-IR analysis further demonstrated that the bonding of structural Fe(III) with functional groups (e.g., carboxyl and phosphate groups) of S. epidermidis. These results herein are important to understand the fate and transport of U(VI) on the mineral-bacteria ternary systems in the near-surface environment.
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Affiliation(s)
- Zexin Zhang
- Key Laboratory of Nano-Mineral and Pollution Control, School of Resources and Environmental Engineering, Hefei University of Technology, 230009, Hefei, PR China; Anhui Province Key Laboratory of Medical Physics and Technology, Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 230031, Hefei, PR China
| | - Haibo Liu
- Key Laboratory of Nano-Mineral and Pollution Control, School of Resources and Environmental Engineering, Hefei University of Technology, 230009, Hefei, PR China.
| | - Lei Liu
- Anhui Province Key Laboratory of Medical Physics and Technology, Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 230031, Hefei, PR China
| | - Wencheng Song
- Anhui Province Key Laboratory of Medical Physics and Technology, Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 230031, Hefei, PR China.
| | - Yubing Sun
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, 102206, Beijing, PR China; Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, School for Radiological and Interdisciplinary Sciences, Soochow University, 215123, Suzhou, PR China.
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33
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Choi D, Oh S. Removal of Chloroxylenol Disinfectant by an Activated Sludge Microbial Community. Microbes Environ 2019; 34:129-135. [PMID: 30799319 PMCID: PMC6594741 DOI: 10.1264/jsme2.me18124] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Chloroxylenol (CHL) is an antimicrobial ingredient that is frequently used in antiseptics/disinfectants for skin (e.g. hand soap) and non-living surfaces. CHL is an alternative to triclosan and triclocarban, the use of which has recently been banned in some countries. Accordingly, the more widespread use of CHL may significantly increase its occurrence and level in aquatic environments in the near future, eventually resulting in potential ecological risks. Wastewater treatment plants (WWTPs) may be a point source of CHL in natural environments due to extensive discharge through urban waste stream disposal. While the satisfactory removal of CHL in WWTPs is critical for maintaining healthy aquatic ecosystems, the extent of CHL removal and whether CHL causes system upset/failure in WWTPs currently remain unknown. In the present study, we conducted bioreactor operation and batch experiments to investigate the fate and effects of CHL and elucidate the mechanisms underlying degradation at various levels from environmentally relevant to high levels (0.5–5 mg L−1). Bioreactors partially removed CHL (44–87%) via a largely biological route. Microbial association networks constructed using 16S rRNA gene sequencing data revealed selective enrichment and a correlation between Sphingobium and CHL, implying its involvement in the biological breakdown of CHL through dehalogenation and ring hydroxylation pathways. The present results provide insights into the behavior and effects of CHL in activated sludge communities and important information for the sustainable management of CHL that may be an emerging issue in the urban water cycle.
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Affiliation(s)
- Donggeon Choi
- Department of Civil Engineering, Kyung Hee University
| | - Seungdae Oh
- Department of Civil Engineering, Kyung Hee University
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34
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A synergistic biosorption and biomineralization strategy for Kocuria sp. to immobilizing U(VI) from aqueous solution. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.11.079] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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35
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Biosorption of U(VI) by active and inactive Aspergillus niger: equilibrium, kinetic, thermodynamic and mechanistic analyses. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06420-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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36
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Su S, Liu Q, Liu J, Zhang H, Li R, Jing X, Wang J. Polyethyleneimine-functionalized Luffa cylindrica for efficient uranium extraction. J Colloid Interface Sci 2018; 530:538-546. [DOI: 10.1016/j.jcis.2018.03.102] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 03/27/2018] [Accepted: 03/28/2018] [Indexed: 02/06/2023]
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37
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Zhang J, Song H, Chen Z, Liu S, Wei Y, Huang J, Guo C, Dang Z, Lin Z. Biomineralization mechanism of U(VI) induced by Bacillus cereus 12-2: The role of functional groups and enzymes. CHEMOSPHERE 2018; 206:682-692. [PMID: 29783053 DOI: 10.1016/j.chemosphere.2018.04.181] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Revised: 04/26/2018] [Accepted: 04/29/2018] [Indexed: 06/08/2023]
Abstract
Current studies reveal that the biomineralization of U(VI) by anaerobes normally produces nano-sized U(IV) minerals that can easily re-migrate/re-oxidize, while the biomineralization of U(VI) by aerobes has been constrained because the general mechanism has not yet been fully characterized. The biomineralization of U(VI) by Bacillus cereus 12-2 was investigated in this work. The maximum biosorption capability of intact cells was 448.68 mg U/g biomass (dry weight) at pH 5, while a decrease over 60% was induced when phosphate, amino, and especially carboxyl groups were shielded. X-ray diffraction, electron microscopy, and tracing the concentration of soluble intracellular U(VI) demonstrated that extracellular amorphous uranium particles can directly enter cells as solid, and about 10 nm-sized (NH4)(UO2)PO4·3H2O was formed subsequently. It was also revealed that the biosorption capability was not affected by a high uranium concentration, while biomineralization was inhibited, suggesting that a high concentration of heavy metals may inhibit the enzyme activity involved in biomineralization. Besides, U(VI) could trigger the overexpression of proteins with a molecular weight of 22 kD, including various phosphatases, kinases, and other enzymes that are related to metabolism and stimulus response, which may contribute to the intracellular transformation of U(VI) compounds from amorphous to crystalline phase. Taken together, the immobilization of U(VI) by B. cereus 12-2 contains two major steps: (1) fast immobilization of U(VI) on the cell surface as amorphous compounds, in which the carboxyl groups served as the predominant coordination functional groups and (2) transport of amorphous particles to cells directly and enzyme-related formation of uramphite.
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Affiliation(s)
- Jian Zhang
- School of Environment and Energy, South China University of Technology, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, Guangdong 510006, China.
| | - Han Song
- School of Geoscience and Surveying Engineering, China University of Mining & Technology, D11, Xueyuan Road, Haidian District, Beijing 100083, China.
| | - Zhi Chen
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Shasha Liu
- School of Environment and Energy, South China University of Technology, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, Guangdong 510006, China.
| | - Yali Wei
- School of Environment and Energy, South China University of Technology, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, Guangdong 510006, China.
| | - Jingyi Huang
- School of Environment and Energy, South China University of Technology, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, Guangdong 510006, China.
| | - Chuling Guo
- School of Environment and Energy, South China University of Technology, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, Guangdong 510006, China.
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, Guangdong 510006, China.
| | - Zhang Lin
- School of Environment and Energy, South China University of Technology, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, Guangdong 510006, China.
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Metabolism-dependent bioaccumulation of uranium by Rhodosporidium toruloides isolated from the flooding water of a former uranium mine. PLoS One 2018; 13:e0201903. [PMID: 30089169 PMCID: PMC6082562 DOI: 10.1371/journal.pone.0201903] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 07/24/2018] [Indexed: 01/18/2023] Open
Abstract
Remediation of former uranium mining sites represents one of the biggest challenges worldwide that have to be solved in this century. During the last years, the search of alternative strategies involving environmentally sustainable treatments has started. Bioremediation, the use of microorganisms to clean up polluted sites in the environment, is considered one the best alternative. By means of culture-dependent methods, we isolated an indigenous yeast strain, KS5 (Rhodosporidium toruloides), directly from the flooding water of a former uranium mining site and investigated its interactions with uranium. Our results highlight distinct adaptive mechanisms towards high uranium concentrations on the one hand, and complex interaction mechanisms on the other. The cells of the strain KS5 exhibit high a uranium tolerance, being able to grow at 6 mM, and also a high ability to accumulate this radionuclide (350 mg uranium/g dry biomass, 48 h). The removal of uranium by KS5 displays a temperature- and cell viability-dependent process, indicating that metabolic activity could be involved. By STEM (scanning transmission electron microscopy) investigations, we observed that uranium was removed by two mechanisms, active bioaccumulation and inactive biosorption. This study highlights the potential of KS5 as a representative of indigenous species within the flooding water of a former uranium mine, which may play a key role in bioremediation of uranium contaminated sites.
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Xie J, Lin J, Zhou X. pH-dependent microbial reduction of uranium(VI) in carbonate-free solutions: UV-vis, XPS, TEM, and thermodynamic studies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:22308-22317. [PMID: 29808405 DOI: 10.1007/s11356-018-2326-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 05/15/2018] [Indexed: 06/08/2023]
Abstract
U(VI)aq bioreduction has an important effect on the fate and transport of uranium isotopes in groundwater at nuclear test sites. In this study, we focus on the pH-dependent bioreduction of U(VI)aq in carbonate-free solutions and give mechanistic insight into the removal kinetics of U(VI)aq. An enhancement in the removal of U(VI)aq with increasing pH was observed within 5 h, e.g., from 19.4% at pH 4.52 to 99.7% at pH 8.30. The removal of U(VI)aq at pH 4.52 was due to the biosorption of U(VI)aq onto the living cells of Shewanella putrefaciens, as evidenced by the almost constant UV-vis absorption intensity of U(VI)aq immediately after contact with S. putrefaciens. Instead, the removal observed at pH 5.97 to 8.30 resulted from the bioreduction of U(VI)aq. The end product of U(VI)aq bioreduction was analyzed using XPS and HRTEM and identified as nanosized UO2. An increasing trend in the biosorption of U(VI)aq onto heat-killed cells was also observed, e.g., ~ 80% at pH 8.38. Evidently, the U(VI)aq that sorbed onto the living cells at pH > 4.52 was further reduced to UO2, although biosorption made a large contribution to the initial removal of U(VI)aq. These results may reveal the removal mechanism, in which the U(VI)aq that was sorbed onto cells rather than the U(VI)aq complexed in solution was reduced. The decreases in the redox potentials of the main complex species of U(VI)aq (e.g., [Formula: see text] and [Formula: see text]) with increasing pH support the proposed removal mechanism.
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Affiliation(s)
- Jinchuan Xie
- Northwest Institute of Nuclear Technology, P.O. Box 69-14, Xi'an City, 710024, Shanxi Province, People's Republic of China.
| | - Jianfeng Lin
- Northwest Institute of Nuclear Technology, P.O. Box 69-14, Xi'an City, 710024, Shanxi Province, People's Republic of China
| | - Xiaohua Zhou
- Northwest Institute of Nuclear Technology, P.O. Box 69-14, Xi'an City, 710024, Shanxi Province, People's Republic of China
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40
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Kolhe N, Zinjarde S, Acharya C. Responses exhibited by various microbial groups relevant to uranium exposure. Biotechnol Adv 2018; 36:1828-1846. [PMID: 30017503 DOI: 10.1016/j.biotechadv.2018.07.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 07/08/2018] [Accepted: 07/09/2018] [Indexed: 11/28/2022]
Abstract
There is a strong interest in knowing how various microbial systems respond to the presence of uranium (U), largely in the context of bioremediation. There is no known biological role for uranium so far. Uranium is naturally present in rocks and minerals. The insoluble nature of the U(IV) minerals keeps uranium firmly bound in the earth's crust minimizing its bioavailability. However, anthropogenic nuclear reaction processes over the last few decades have resulted in introduction of uranium into the environment in soluble and toxic forms. Microbes adsorb, accumulate, reduce, oxidize, possibly respire, mineralize and precipitate uranium. This review focuses on the microbial responses to uranium exposure which allows the alteration of the forms and concentrations of uranium within the cell and in the local environment. Detailed information on the three major bioprocesses namely, biosorption, bioprecipitation and bioreduction exhibited by the microbes belonging to various groups and subgroups of bacteria, fungi and algae is provided in this review elucidating their intrinsic and engineered abilities for uranium removal. The survey also highlights the instances of the field trials undertaken for in situ uranium bioremediation. Advances in genomics and proteomics approaches providing the information on the regulatory and physiologically important determinants in the microbes in response to uranium challenge have been catalogued here. Recent developments in metagenomics and metaproteomics indicating the ecologically relevant traits required for the adaptation and survival of environmental microbes residing in uranium contaminated sites are also included. A comprehensive understanding of the microbial responses to uranium can facilitate the development of in situ U bioremediation strategies.
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Affiliation(s)
- Nilesh Kolhe
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune 411007, India; Molecular Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Smita Zinjarde
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune 411007, India; Department of Microbiology, Savitribai Phule Pune University, Pune 411007, India.
| | - Celin Acharya
- Molecular Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India; Homi Bhabha National Institute, Anushakti Nagar, Trombay, Mumbai 400094, India.
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41
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Zheng XY, Shen YH, Wang XY, Wang TS. Effect of pH on uranium(VI) biosorption and biomineralization by Saccharomyces cerevisiae. CHEMOSPHERE 2018; 203:109-116. [PMID: 29614403 DOI: 10.1016/j.chemosphere.2018.03.165] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Revised: 03/07/2018] [Accepted: 03/24/2018] [Indexed: 06/08/2023]
Abstract
Biosorption of radionuclides by microorganisms is a promising and effective method for the remediation of contaminated areas. pH is the most important factor during uranium biosorption by Saccharomyces cerevisiae because the pH value not only affects the biosorption rate but also affects the precipitation structure. This study investigated the effect of pH on uranium (VI) biosorption and biomineralization by S. cerevisiae. Cells have the ability to buffer the solution to neutral, allowing the biosorption system to reach an optimal level regardless of the initial pH value. This occurs because there is a release of phosphate and ammonium ions during the interaction between cells and uranium. The uranyl and phosphate ions formed nano-particles, which is chernikovite H2(UO2)2(PO4)2·8H2O (PDF #08-0296), on cell surface under the initial acidic conditions. However, under the initial alkaline conditions, the uranyl, phosphate and ammonium ions formed a large amount of scale-like precipitation, which is uramphite (NH4)(UO2)PO4·3H2O (PDF #42-0384), evenly over on cell surface.
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Affiliation(s)
- X Y Zheng
- School of Nuclear Science and Technology, Lanzhou University, Address: NO.222, Tianshui South Road, Chengguan District, Lanzhou 730000, China.
| | - Y H Shen
- School of Nuclear Science and Technology, Lanzhou University, Address: NO.222, Tianshui South Road, Chengguan District, Lanzhou 730000, China.
| | - X Y Wang
- School of Nuclear Science and Technology, Lanzhou University, Address: NO.222, Tianshui South Road, Chengguan District, Lanzhou 730000, China.
| | - T S Wang
- School of Nuclear Science and Technology, Lanzhou University, Address: NO.222, Tianshui South Road, Chengguan District, Lanzhou 730000, China.
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42
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Sun Z, Chen D, Chen B, Kong L, Su M. Enhanced uranium(VI) adsorption by chitosan modified phosphate rock. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.02.043] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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43
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Qiu L, Feng J, Dai Y, Chang S. Biosorption of strontium ions from simulated high-level liquid waste by living Saccharomyces cerevisiae. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:17194-17206. [PMID: 29651726 DOI: 10.1007/s11356-018-1662-6] [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: 09/07/2017] [Accepted: 02/28/2018] [Indexed: 06/08/2023]
Abstract
In this study, the Saccharomyces cerevisiae (S. cerevisiae) was modified by γ-ray. The RNA-seq results reflect that the high γ-ray energies could change some gene fragments, such as deletion, recombination, and mutation. The biosorption of strontium ions (Sr2+) to different types of S. cerevisiae (S. cerevisiae (K-0), modified S. cerevisiae (Y-7), and non-living S. cerevisiae (H-K)) from the simulated high-level liquid waste (S-HLLW) was assessed at different experimental conditions. The sorption experimental results show that, under an appropriate condition, γ-ray radiation can enhance its biosorption capacity slightly of Sr2+ to S. cerevisiae. The maximum metal uptake and efficiency of Y-7 under S-HLLW were 11.656 mg g-1 and 37.91% at 32 h (wet weight), respectively. They decreased to 9.46 mg g-1 and 30.76% under radiation conditions. SEM-EDX and TEM analysis indicates that Sr2+ was adsorbed both on the cellular surface and the inner parts of the cells. Our experimental results fit well to the Langmuir and Freundlich model isotherms (r2 > 0.94), and the maximum biosorption capacity values reached qmax > 24.74 mg g-1 at 32 °C. Negative values of ΔG0 and positive values of ΔH0 were observed, indicating the spontaneous and endothermic nature of Sr2+ biosorption on modified S. cerevisiae. The biosorption kinetics follow a pseudo-second-order equation at 32 °C (r2 > 0.94). The desorption efficiency of Sr2+ adsorbed onto Y-7 was 7.65 ± 0.52%, 76.51 ± 2.13%, and 65.62 ± 2.42% by deionized water, 1 M HCl, and 0.1 M EDTA-Na, respectively. However, they were lower than H-K (18.82, 83.32, and 73.32%). Our findings demonstrate that living S. cerevisiae (Y-7) is a promising sorbent material for the treatment of radioactive process streams.
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Affiliation(s)
- Liang Qiu
- Department of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, People's Republic of China
| | - Jundong Feng
- Department of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, People's Republic of China.
| | - Yaodong Dai
- Department of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, People's Republic of China
| | - Shuquan Chang
- Department of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, People's Republic of China
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44
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Hu W, Li M, Chen T, Zhang Z, Chen D, Liu H. Enrichment of U(VI) on Bacillus subtilis/Fe3O4 nanocomposite. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.03.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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45
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Lopez-Fernandez M, Romero-González M, Günther A, Solari PL, Merroun ML. Effect of U(VI) aqueous speciation on the binding of uranium by the cell surface of Rhodotorula mucilaginosa, a natural yeast isolate from bentonites. CHEMOSPHERE 2018; 199:351-360. [PMID: 29453061 DOI: 10.1016/j.chemosphere.2018.02.055] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 02/06/2018] [Accepted: 02/08/2018] [Indexed: 06/08/2023]
Abstract
This study presents the effect of aqueous uranium speciation (U-hydroxides and U-hydroxo-carbonates) on the interaction of this radionuclide with the cells of the yeast Rhodotorula mucigilanosa BII-R8. This strain was isolated from Spanish bentonites considered as reference materials for the engineered barrier components of the future deep geological repository of radioactive waste. X-ray absorption and infrared spectroscopy showed that the aqueous uranium speciation has no effect on the uranium binding process by this yeast strain. The cells bind mobile uranium species (U-hydroxides and U-hydroxo-carbonates) from solution via a time-dependent process initiated by the adsorption of uranium species to carboxyl groups. This leads to the subsequent involvement of organic phosphate groups forming uranium complexes with a local coordination similar to that of the uranyl mineral phase meta-autunite. Scanning transmission electron microscopy with high angle annular dark field analysis showed uranium accumulations at the cell surface associated with phosphorus containing ligands. Moreover, the effect of uranium mobile species on the cell viability and metabolic activity was examined by means of flow cytometry techniques, revealing that the cell metabolism is more affected by higher concentrations of uranium than the cell viability. The results obtained in this work provide new insights on the interaction of uranium with bentonite natural yeast from genus Rhodotorula under deep geological repository relevant conditions.
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Affiliation(s)
| | | | - Alix Günther
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
| | - Pier L Solari
- MARS Beamline, Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, Gif-sur-Yvette Cedex, France
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46
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Shen Y, Zheng X, Wang X, Wang T. The biomineralization process of uranium(VI) by Saccharomyces cerevisiae - transformation from amorphous U(VI) to crystalline chernikovite. Appl Microbiol Biotechnol 2018; 102:4217-4229. [PMID: 29564524 DOI: 10.1007/s00253-018-8918-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 03/05/2018] [Accepted: 03/06/2018] [Indexed: 11/30/2022]
Abstract
Microorganisms play a significant role in uranium(VI) biogeochemistry and influence U(VI) transformation through biomineralization. In the present work, the process of uranium mineralization was investigated by Saccharomyces cerevisiae. The toxicity experiments showed that the viability of cell was not significantly affected by 100 mg L-1 U(VI) under 4 days of exposure time. The batch experiments showed that the phosphate concentration and pH value increased over time during U(VI) adsorption. Meanwhile, thermodynamic calculations demonstrated that the adsorption system was supersaturated with respect to UO2HPO4. The X-ray powder diffraction spectroscopy (XRD), field emission scanning electron microscopy (FE-SEM) equipped with energy dispersive spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) analyses indicated that the U(VI) was first attached onto the cell surface and reacted with hydroxyl, carboxyl, and phosphate groups through electrostatic interactions and complexation. As the immobilization of U(VI) transformed it from the ionic to the amorphous state, lamellar uranium precipitate was formed on the cell surface. With the prolongation of time, the amorphous uranium compound disappeared, and there were some crystalline substances observed extracellularly, which were well-characterized as tetragonal-chernikovite. Furthermore, the size of chernikovite was regulated at nano-level by cells, and the perfect crystal was formed finally. These findings provided an understanding of the non-reductive transformation process of U(VI) from the amorphous to crystalline state within microbe systems, which would be beneficial for the U(VI) treatment and reuse of nuclides and heavy metals.
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Affiliation(s)
- Yanghao Shen
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Xinyan Zheng
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Xiaoyu Wang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Tieshan Wang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China.
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47
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Ji G, Zhu G, Wang X, Wei Y, Wu H, Yuan J, Gao C. Granulation of short channel SBA-15 adsorbent and application for the removal of U(VI) by packed column. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-018-5748-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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48
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Su S, Liu Q, Liu J, Zhang H, Li R, Jing X, Wang J. Functionalized Sugarcane Bagasse for U(VI) Adsorption from Acid and Alkaline Conditions. Sci Rep 2018; 8:793. [PMID: 29335591 PMCID: PMC5768879 DOI: 10.1038/s41598-017-18698-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 12/14/2017] [Indexed: 01/09/2023] Open
Abstract
The highly efficient removal of uranium from mine tailings effluent, radioactive wastewater and enrichment from seawater is of great significance for the development of nuclear industry. In this work, we prepared an efficient U(VI) adsorbent by EDTA modified sugarcane bagasse (MESB) with a simple process. The prepared adsorbent preserves high adsorptive capacity for UO22+ (pH 3.0) and uranyl complexes, such as UO2(OH)+, (UO2)2(OH)22+ and (UO2)3(OH)5+ (pH 4.0 and pH 5.0) and good repeatability in acidic environment. The maximum adsorption capacity for U(VI) at pH 3.0, 4.0 and 5.0 is 578.0, 925.9 and 1394.1 mg/g and the adsorption capacity loss is only 7% after five cycles. With the pH from 3.0 to 5.0, the inhibitive effects of Na+ and K+ decreased but increased of Mg2+ and Ca2+. MESB also exhibits good adsorption for [UO2(CO3)3]4- at pH 8.3 from 10 mg/L to 3.3 μg/L. Moreover, MESB could effectively extract U(VI) from simulated seawater in the presence of other metals ions. This work provided a general and efficient uranyl enriched material for nuclear industry.
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Affiliation(s)
- Shouzheng Su
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, P. R. China
| | - Qi Liu
- Institute of Advanced Marine Materials, Harbin Engineering University, Harbin, 150001, P. R. China.
- Harbin Shipbuilding Engineering Design & Research Academy, Harbin, China.
| | - Jingyuan Liu
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, P. R. China
| | - Hongsen Zhang
- Modern Analysis, Test and Research Center, Heilongjiang University of Science and Technology, Harbin, 150027, P. R. China
| | - Rumin Li
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, P. R. China
| | - Xiaoyan Jing
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, P. R. China
| | - Jun Wang
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, P. R. China.
- Institute of Advanced Marine Materials, Harbin Engineering University, Harbin, 150001, P. R. China.
- Harbin Shipbuilding Engineering Design & Research Academy, Harbin, China.
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Li X, Li D, Yan Z, Ao Y. Adsorption of cadmium by live and dead biomass of plant growth-promoting rhizobacteria. RSC Adv 2018; 8:33523-33533. [PMID: 35548138 PMCID: PMC9086479 DOI: 10.1039/c8ra06758a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 09/15/2018] [Indexed: 11/28/2022] Open
Abstract
Plant growth-promoting rhizobacteria (PGPR) have been extensively investigated in combination remediation with plants in heavy metal contaminated soil. However, being biosorbent, few studies of live and dead cells of PGPR have been undertaken. Meanwhile, the application of live or dead biomass for the removal of heavy metals continues to be debated. Therefore, this study uses living and non-living biosorbents of Cupriavidus necator GX_5, Sphingomonas sp. GX_15, and Curtobacterium sp. GX_31 to compare their Cd(ii) adsorption capacities by SEM-EDX, FTIR, and adsorption experiments. In the present study, whether the cells were living or dead and whatever the initial Cd(ii) concentration was, removal efficiency and adsorption capacity can be arranged as GX_31 > GX_15 > GX_5 (p < 0.05). However, removal efficiency in live and dead biosorbents was quite different and it greatly affected by the initial Cd(ii) concentrations. The dead cells exhibited a higher adsorption capacity than the live cells of GX_31. Nevertheless, for GX_5 and GX_15, the loading capacity of the non-living biomass was stronger than that of the living biomass at 20 mg L−1 of Cd(ii), but the capacity was similar at 100 mg L−1 of Cd(ii). Minor changes of spectra were found after autoclaving and it seemed that more functional groups of the dead biosorbent were involved in Cd(ii) binding by FTIR analysis, which also illustrated that the hydroxyl, amino, amide, and carboxyl groups played an important role in complexation with Cd(ii). Based on these findings, we concluded that the dead cells were more potent for Cd(ii) remediation, especially for GX_31. Plant growth-promoting rhizobacteria (PGPR) have been extensively investigated in combination remediation with plants in heavy metal contaminated soil.![]()
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Affiliation(s)
- Xingjie Li
- School of Agriculture and Biology
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Dongbo Li
- School of Agriculture and Biology
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Zhenning Yan
- School of Agriculture and Biology
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Yansong Ao
- School of Agriculture and Biology
- Shanghai Jiao Tong University
- Shanghai 200240
- China
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Wang P, Dong F, Wang X, Liu M, Nie X, Zhou L, Huo T, Zhang W, Wei H. Effects of riboflavin and AQS as electron shuttles on U(vi) reduction and precipitation byShewanella putrefaciens. RSC Adv 2018; 8:30692-30700. [PMID: 35548745 PMCID: PMC9085505 DOI: 10.1039/c8ra05715j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 08/19/2018] [Indexed: 11/21/2022] Open
Abstract
Understanding the mechanisms for electron shuttles (ESs) in microbial extracellular electron transfer (EET) is important in biogeochemical cycles, bioremediation applications, as well as bioenergy strategies.
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Affiliation(s)
- Pingping Wang
- The Key Laboratory of Solid Waste Treatment and Resource
- Ministry of Education
- Southwest University of Science and Technology
- Mianyang
- China
| | - Faqin Dong
- The Key Laboratory of Solid Waste Treatment and Resource
- Ministry of Education
- Southwest University of Science and Technology
- Mianyang
- China
| | - Xuhui Wang
- School of Life Science and Engineering
- Southwest University of Science and Technology
- Mianyang
- China
| | - Mingxue Liu
- The Key Laboratory of Solid Waste Treatment and Resource
- Ministry of Education
- Southwest University of Science and Technology
- Mianyang
- China
| | - Xiaoqin Nie
- The Key Laboratory of Solid Waste Treatment and Resource
- Ministry of Education
- Southwest University of Science and Technology
- Mianyang
- China
| | - Lei Zhou
- The Key Laboratory of Solid Waste Treatment and Resource
- Ministry of Education
- Southwest University of Science and Technology
- Mianyang
- China
| | - Tingting Huo
- The Key Laboratory of Solid Waste Treatment and Resource
- Ministry of Education
- Southwest University of Science and Technology
- Mianyang
- China
| | - Wei Zhang
- The Key Laboratory of Solid Waste Treatment and Resource
- Ministry of Education
- Southwest University of Science and Technology
- Mianyang
- China
| | - Hongfu Wei
- School of Life Science and Engineering
- Southwest University of Science and Technology
- Mianyang
- China
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