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Roy R, Samanta S, Pandit S, Naaz T, Banerjee S, Rawat JM, Chaubey KK, Saha RP. An Overview of Bacteria-Mediated Heavy Metal Bioremediation Strategies. Appl Biochem Biotechnol 2024; 196:1712-1751. [PMID: 37410353 DOI: 10.1007/s12010-023-04614-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/19/2023] [Indexed: 07/07/2023]
Abstract
Contamination-free groundwater is considered a good source of potable water. Even in the twenty-first century, over 90 percent of the population is reliant on groundwater resources for their lives. Groundwater influences the economical state, industrial development, ecological system, and agricultural and global health conditions worldwide. However, different natural and artificial processes are gradually polluting groundwater and drinking water systems throughout the world. Toxic metalloids are one of the major sources that pollute the water system. In this review work, we have collected and analyzed information on metal-resistant bacteria along with their genetic information and remediation mechanisms of twenty different metal ions [arsenic (As), mercury (Hg), lead (Pb), chromium (Cr), iron (Fe), copper (Cu), cadmium (Cd), palladium (Pd), zinc (Zn), cobalt (Co), antimony (Sb), gold (Au), silver (Ag), platinum (Pt), selenium (Se), manganese (Mn), molybdenum (Mo), nickel (Ni), tungsten (W), and uranium (U)]. We have surveyed the scientific information available on bacteria-mediated bioremediation of various metals and presented the data with responsible genes and proteins that contribute to bioremediation, bioaccumulation, and biosorption mechanisms. Knowledge of the genes responsible and self-defense mechanisms of diverse metal-resistance bacteria would help us to engineer processes involving multi-metal-resistant bacteria that may reduce metal toxicity in the environment.
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Affiliation(s)
- Rima Roy
- Department of Biotechnology, School of Life Science & Biotechnology, Adamas University, Kolkata, 700126, India.
| | - Saikat Samanta
- Department of Biotechnology, School of Life Science & Biotechnology, Adamas University, Kolkata, 700126, India
| | - Soumya Pandit
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Greater Noida, 201306, India
| | - Tahseena Naaz
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Greater Noida, 201306, India
| | - Srijoni Banerjee
- Department of Biotechnology, School of Life Science & Biotechnology, Adamas University, Kolkata, 700126, India
| | - Janhvi Mishra Rawat
- Department of Life Sciences, Graphic Era Deemed to Be University, Dehradun, 248002, Uttarakhand, India
| | - Kundan Kumar Chaubey
- Division of Research and Innovation, School of Applied and Life Sciences, Uttaranchal University, Dehradun, Uttarakhand, 248007, India
| | - Rudra P Saha
- Department of Biotechnology, School of Life Science & Biotechnology, Adamas University, Kolkata, 700126, India.
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2
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Malik AQ, Mir TUG, Kumar D, Mir IA, Rashid A, Ayoub M, Shukla S. A review on the green synthesis of nanoparticles, their biological applications, and photocatalytic efficiency against environmental toxins. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27437-9. [PMID: 37171732 DOI: 10.1007/s11356-023-27437-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 05/01/2023] [Indexed: 05/13/2023]
Abstract
Green synthesis of nanoparticles (NPs) using plant materials and microorganisms has evolved as a sustainable alternative to conventional techniques that rely on toxic chemicals. Recently, green-synthesized eco-friendly NPs have attracted interest for their potential use in various biological applications. Several studies have demonstrated that green-synthesized NPs are beneficial in multiple medicinal applications, including cancer treatment, targeted drug delivery, and wound healing. Additionally, due to their photodegradation activity, green-synthesized NPs are a promising tool in environmental remediation. Photodegradation is a process that uses light and a photocatalyst to turn a pollutant into a harmless product. Green NPs have been found efficient in degrading pollutants such as dyes, herbicides, and heavy metals. The use of microbes and flora in green synthesis technology for nanoparticle synthesis is biologically safe, cost-effective, and eco-friendly. Plants and microbes can now use and accumulate inorganic metallic ions in the environment. Various NPs have been synthesized via the bio-reduction of biological entities or their extracts. There are several biological and environmental uses for biologically synthesized metallic NPs, such as photocatalysis, adsorption, and water purification. Since the last decade, the green synthesis of NPs has gained significant interest in the scientific community. Therefore, there is a need for a review that serves as a one-stop resource that points to relevant and recent studies on the green synthesis of NPs and their biological and photocatalytic efficiency. This review focuses on the green fabrication of NPs utilizing diverse biological systems and their applications in biological and photodegradation processes.
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Affiliation(s)
- Azad Qayoom Malik
- School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, Punjab, India, 144411.
| | - Tahir Ul Gani Mir
- School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, India, 144411
| | - Deepak Kumar
- School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, Punjab, India, 144411
| | - Irtiqa Ashraf Mir
- School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, Punjab, India, 144411
| | - Adfar Rashid
- School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, Punjab, India, 144411
| | - Mehnaz Ayoub
- School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, Punjab, India, 144411
| | - Saurabh Shukla
- School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, India, 144411
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3
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Mosquera-Romero S, Anaya-Garzon J, Garcia-Timermans C, Van Dorpe J, Hoorens A, Commenges-Bernole N, Verbeken K, Rabaey K, Varia J. Combined Gold Recovery and Nanoparticle Synthesis in Microbial Systems Using Fractional Factorial Design. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 13:83. [PMID: 36615993 PMCID: PMC9824045 DOI: 10.3390/nano13010083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/15/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
Green synthesis of gold nanoparticles (AuNPs) using microorganisms has been generally studied aiming for high-yield production and morphologies appropriated for various applications, such as bioremediation, (bio)sensors, and (bio)catalysis. Numerous approaches showed the individual effect of factors influencing the synthesis of AuNPs with limited analysis of the governing factors enhancing the production and desired quality of the precipitates. This study proposes a fractional-factorial design to investigate the simultaneous influence of seven environmental factors (cell concentration, temperature, anoxic/oxic conditions, pH, gold concentration, electron donor type, and bacterial species) on the recovery yield and synthesis of targeted AuNPs. Various sizes and morphologies of the AuNPs were obtained by varying the environmental factors studied. The factors with significant effects (i.e., 0.2 mM Au and pH 5) were selected according to statistical analysis for optimal removal of 88.2 ± 3.5% of gold and with the production of valuable 50 nm AuNPs, which are known for their enhanced sensitivity. Implications of the cytochrome-C on the bacterial mechanisms and the provision of electron donors via an electrochemical system are further discussed. This study helps develop gold recovery and nanoparticle synthesis methods, focusing on the determining factor(s) for efficient, low-cost, green synthesis of valuable materials.
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Affiliation(s)
- Suanny Mosquera-Romero
- Center for Microbial Ecology & Technology (CMET), Ghent University, Coupure Links 653, B-9000 Gent, Belgium
- ESPOL Polytechnic University, Escuela Superior Politécnica del Litoral, ESPOL, Facultad de Ciencias Naturales y Matemáticas, Campus Gustavo Galindo km. 30.5 Vía Perimetral, Guayaquil P.O. Box 09-01-5863, Ecuador
| | - Juan Anaya-Garzon
- Center for Microbial Ecology & Technology (CMET), Ghent University, Coupure Links 653, B-9000 Gent, Belgium
- University Grenoble Alpes, University Savoie Mont Blanc, CNRS, Grenoble INP (Institute of Engineering and Management University Grenoble Alpes), LEPMI, 38000 Grenoble, France
| | - Cristina Garcia-Timermans
- Center for Microbial Ecology & Technology (CMET), Ghent University, Coupure Links 653, B-9000 Gent, Belgium
| | - Jo Van Dorpe
- Department of Pathology, Ghent University Hospital, Entrance 23, Corneel Heymanslaan 10, B-9000 Ghent, Belgium
| | - Anne Hoorens
- Department of Pathology, Ghent University Hospital, Entrance 23, Corneel Heymanslaan 10, B-9000 Ghent, Belgium
| | - Nadine Commenges-Bernole
- University Grenoble Alpes, University Savoie Mont Blanc, CNRS, Grenoble INP (Institute of Engineering and Management University Grenoble Alpes), LEPMI, 38000 Grenoble, France
| | - Kim Verbeken
- Department of Materials, Textiles and Chemical Engineering, Ghent University, Technologiepark-Zwijnaarde 46, B-9052 Gent, Belgium
| | - Korneel Rabaey
- Center for Microbial Ecology & Technology (CMET), Ghent University, Coupure Links 653, B-9000 Gent, Belgium
- Centre for Advanced Process Technology for Urban Resource Recovery (CAPTURE), Frieda Saeysstraat 1, B-9000 Ghent, Belgium
| | - Jeet Varia
- Center for Microbial Ecology & Technology (CMET), Ghent University, Coupure Links 653, B-9000 Gent, Belgium
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Joudeh N, Saragliadis A, Koster G, Mikheenko P, Linke D. Synthesis methods and applications of palladium nanoparticles: A review. FRONTIERS IN NANOTECHNOLOGY 2022. [DOI: 10.3389/fnano.2022.1062608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Palladium (Pd) is a key component of many catalysts. Nanoparticles (NPs) offer a larger surface area than bulk materials, and with Pd cost increasing 5-fold in the last 10 years, Pd NPs are in increasing demand. Due to novel or enhanced physicochemical properties that Pd NPs exhibit at the nanoscale, Pd NPs have a wide range of applications not only in chemical catalysis, but also for example in hydrogen sensing and storage, and in medicine in photothermal, antibacterial, and anticancer therapies. Pd NPs, on the industrial scale, are currently synthesized using various chemical and physical methods. The physical methods require energy-intensive processes that include maintaining high temperatures and/or pressure. The chemical methods usually involve harmful solvents, hazardous reducing or stabilizing agents, or produce toxic pollutants and by-products. Lately, more environmentally friendly approaches for the synthesis of Pd NPs have emerged. These new approaches are based on the use of the reducing ability of phytochemicals and other biomolecules to chemically reduce Pd ions and form NPs. In this review, we describe the common physical and chemical methods used for the synthesis of Pd NPs and compare them to the plant- and bacteria-mediated biogenic synthesis methods. As size and shape determine many of the unique properties of Pd NPs on the nanoscale, special emphasis is given to the control of these parameters, clarifying how they impact current and future applications of this exciting nanomaterial.
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5
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Kishore S, Malik S, Shah MP, Bora J, Chaudhary V, Kumar L, Sayyed RZ, Ranjan A. A comprehensive review on removal of pollutants from wastewater through microbial nanobiotechnology -based solutions. Biotechnol Genet Eng Rev 2022:1-26. [PMID: 35923085 DOI: 10.1080/02648725.2022.2106014] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 07/15/2022] [Indexed: 11/02/2022]
Abstract
Increasing wastewater pollution owing to the briskly rising human population, rapid industrialization, and fast urbanization has necessitated highly efficient wastewater treatment technologies. Although several methods of wastewater treatments are in practice, expensiveness, use of noxious chemicals, generation of unsafe by-products, and longer time consumption restrain their use to a great extent. Over the last few decades, nanotechnological wastewater treatment approaches have received widespread recognition globally. Microbially fabricated nanoparticles reduce the utilization of reducing, capping, and stabilizing agents, and exhibit higher adsorptive and catalytic efficiency than chemically synthesized nanomaterials. The present review comprehensively summarizes the applications of microbial nanotechnology in the removal of a wide range of noxious wastewater pollutants. Moreover, prospects and challenges associated with the integration of nanotechnology with other biological treatment technologies including algal-membrane bioreactor, aerobic digestion, microbial fuel cells, and microbial nanofiber webs have also been briefly discussed.
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Affiliation(s)
- Shristi Kishore
- Amity Institute of Biotechnology, Amity University Jharkhand, Ranchi, India
| | - Sumira Malik
- Amity Institute of Biotechnology, Amity University Jharkhand, Ranchi, India
| | | | - Jutishna Bora
- Amity Institute of Biotechnology, Amity University Jharkhand, Ranchi, India
| | - Vishal Chaudhary
- Research Cell & Department of Physics, Bhagini Nivedita College, University of Delhi, Delhi, India
| | - Lamha Kumar
- School of Biology, Indian Institute of Science Education and Research, Thiruvananthapuram, India
| | - Riyaz Z Sayyed
- Department of Microbiology, PSGVP Mandal's Arts, Science and Commerce College, Shahada, India
| | - Anuj Ranjan
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
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6
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Du Z, Zhang Y, Xu A, Pan S, Zhang Y. Biogenic metal nanoparticles with microbes and their applications in water treatment: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:3213-3229. [PMID: 34734337 DOI: 10.1007/s11356-021-17042-z] [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: 03/08/2021] [Accepted: 10/11/2021] [Indexed: 06/13/2023]
Abstract
Due to their unique characteristics, nanomaterials are widely used in many applications including water treatment. They are usually synthesized via physiochemical methods mostly involving toxic chemicals and extreme conditions. Recently, the biogenic metal nanoparticles (Bio-Me-NPs) with microbes have triggered extensive exploration. Besides their environmental-friendly raw materials and ambient biosynthesis conditions, Bio-Me-NPs also exhibit the unique surface properties and crystalline structures, which could eliminate various contaminants from water. Recent findings in the synthesis, morphology, composition, and structure of Bio-Me-NPs have been reviewed here, with an emphasis on the metal elements of Fe, Mn, Pd, Au, and Ag and their composites which are synthesized by bacteria, fungi, and algae. Furthermore, the mechanisms of eliminating organic and inorganic contaminants with Bio-Me-NPs are elucidated in detail, including adsorption, oxidation, reduction, and catalysis. The scale-up applicability of Bio-Me-NPs is also discussed.
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Affiliation(s)
- Zhiling Du
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing, 211800, People's Republic of China
- School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Yunhai Zhang
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing, 211800, People's Republic of China
| | - Anlin Xu
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing, 211800, People's Republic of China
| | - Shunlong Pan
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing, 211800, People's Republic of China
| | - Yongjun Zhang
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing, 211800, People's Republic of China.
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7
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Joudeh N, Saragliadis A, Schulz C, Voigt A, Almaas E, Linke D. Transcriptomic Response Analysis of Escherichia coli to Palladium Stress. Front Microbiol 2021; 12:741836. [PMID: 34690987 PMCID: PMC8533678 DOI: 10.3389/fmicb.2021.741836] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 09/03/2021] [Indexed: 12/13/2022] Open
Abstract
Palladium (Pd), due to its unique catalytic properties, is an industrially important heavy metal especially in the form of nanoparticles. It has a wide range of applications from automobile catalytic converters to the pharmaceutical production of morphine. Bacteria have been used to biologically produce Pd nanoparticles as a new environmentally friendly alternative to the currently used energy-intensive and toxic physicochemical methods. Heavy metals, including Pd, are toxic to bacterial cells and cause general and oxidative stress that hinders the use of bacteria to produce Pd nanoparticles efficiently. In this study, we show in detail the Pd stress-related effects on E. coli. Pd stress effects were measured as changes in the transcriptome through RNA-Seq after 10 min of exposure to 100 μM sodium tetrachloropalladate (II). We found that 709 out of 3,898 genes were differentially expressed, with 58% of them being up-regulated and 42% of them being down-regulated. Pd was found to induce several common heavy metal stress-related effects but interestingly, Pd causes unique effects too. Our data suggests that Pd disrupts the homeostasis of Fe, Zn, and Cu cellular pools. In addition, the expression of inorganic ion transporters in E. coli was found to be massively modulated due to Pd intoxication, with 17 out of 31 systems being affected. Moreover, the expression of several carbohydrate, amino acid, and nucleotide transport and metabolism genes was vastly changed. These results bring us one step closer to the generation of genetically engineered E. coli strains with enhanced capabilities for Pd nanoparticles synthesis.
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Affiliation(s)
- Nadeem Joudeh
- Department of Biosciences, University of Oslo, Oslo, Norway
| | | | - Christian Schulz
- Department of Biotechnology and Food Science, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - André Voigt
- Department of Biotechnology and Food Science, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Eivind Almaas
- Department of Biotechnology and Food Science, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Dirk Linke
- Department of Biosciences, University of Oslo, Oslo, Norway
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8
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Ehrlich H, Bailey E, Wysokowski M, Jesionowski T. Forced Biomineralization: A Review. Biomimetics (Basel) 2021; 6:46. [PMID: 34287234 PMCID: PMC8293141 DOI: 10.3390/biomimetics6030046] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/29/2021] [Accepted: 07/02/2021] [Indexed: 12/31/2022] Open
Abstract
Biologically induced and controlled mineralization of metals promotes the development of protective structures to shield cells from thermal, chemical, and ultraviolet stresses. Metal biomineralization is widely considered to have been relevant for the survival of life in the environmental conditions of ancient terrestrial oceans. Similar behavior is seen among extremophilic biomineralizers today, which have evolved to inhabit a variety of industrial aqueous environments with elevated metal concentrations. As an example of extreme biomineralization, we introduce the category of "forced biomineralization", which we use to refer to the biologically mediated sequestration of dissolved metals and metalloids into minerals. We discuss forced mineralization as it is known to be carried out by a variety of organisms, including polyextremophiles in a range of psychrophilic, thermophilic, anaerobic, alkaliphilic, acidophilic, and halophilic conditions, as well as in environments with very high or toxic metal ion concentrations. While much additional work lies ahead to characterize the various pathways by which these biominerals form, forced biomineralization has been shown to provide insights for the progression of extreme biomimetics, allowing for promising new forays into creating the next generation of composites using organic-templating approaches under biologically extreme laboratory conditions relevant to a wide range of industrial conditions.
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Affiliation(s)
- Hermann Ehrlich
- Institute of Electronic and Sensor Materials, TU Bergakademie Freiberg, 09599 Freiberg, Germany
- Center for Advanced Technology, Adam Mickiewicz University, 61614 Poznan, Poland
- Centre for Climate Change Research, Toronto, ON M4P 1J4, Canada
- ICUBE-University of Toronto Mississauga, Mississauga, ON L5L 1C6, Canada
| | - Elizabeth Bailey
- Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA;
| | - Marcin Wysokowski
- Faculty of Chemical Technology, Institute of Chemical Technology and Engineering, Poznan University of Technology, 60-965 Poznan, Poland
| | - Teofil Jesionowski
- Faculty of Chemical Technology, Institute of Chemical Technology and Engineering, Poznan University of Technology, 60-965 Poznan, Poland
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9
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Synthesis of Biogenic Palladium Nanoparticles Using Citrobacter sp. for Application as Anode Electrocatalyst in a Microbial Fuel Cell. Catalysts 2020. [DOI: 10.3390/catal10080838] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Palladium (Pd) is a cheap and effective electrocatalyst that is capable of replacing platinum (Pt) in various applications. However, the problem in using chemically synthesized Pd nanoparticles (PdNPs) is that they are mostly fabricated using toxic chemicals under severe conditions. In this study, we present a more environmentally-friendly process in fabricating biogenic Pd nanoparticles (Bio-PdNPs) using Citrobacter sp. isolated from wastewater sludge. Successful fabrication of Bio-PdNPs was achieved under anaerobic conditions at pH six and a temperature of 30 °C using sodium formate (HCOONa) as an electron donor. Citrobacter sp. showed biosorption capabilities with no enzymatic contribution to Pd(II) uptake during absence of HCOONa in both live and dead cells. Citrobacter sp. live cells also displayed high enzymatic contribution to the removal of Pd(II) by biological reduction. This was confirmed by Scanning Electron Microscope (SEM), Electron Dispersive Spectroscopy (EDS), and X-ray Diffraction (XRD) characterization, which revealed the presence Bio-PdNPs deposited on the bacterial cells. The bio-PdNPs successfully enhanced the anode performance of the Microbial Fuel Cell (MFC). The MFC with the highest Bio-PdNPs loading (4 mg Bio-PdNP/cm2) achieved a maximum power density of 539.3 mW/m3 (4.01 mW/m2) and peak voltage of 328.4 mV.
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10
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Quan X, Wang X, Zheng Y, Li W, Chen L, Pei Y. Effects of biogenic nanopalladium precipitation on the performance and microbial community structure of anaerobic granular sludge. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 705:135765. [PMID: 31787279 DOI: 10.1016/j.scitotenv.2019.135765] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 11/09/2019] [Accepted: 11/24/2019] [Indexed: 06/10/2023]
Abstract
Biogenic nanopalladium (BioPd) catalysts have drawn increasing attentions recently as a combination of metal catalyst over the support of biomass. Anaerobic granular sludge (AGS), as a special microbial granule, demonstrates a strong potential to reduce Pd(II) and precipitate Bio-Pd in the sludge body. The problem how the Bio-Pd precipitates would influence the function and microbial community of the Pd hosting AGS (Pd-AGS) remains unknown. In this study, Pd-AGS with different Bio-Pd loadings (1.7, 3.0, 4.4 and 8.0 wt% of Pd) was obtained through bio-reduction at different Na2PdCl4 concentrations. Effects of Bio-Pd precipitates on acidogenesis and methanogenesis of AGS were assayed. Response of bacterial and archaeal community of AGS towards Bio-Pd precipitation were also revealed based on high-throughput sequencing data on Illumina Miseq platform. Results showed that Bio-Pd precipitates affected the acidogenesis and methanogenesis process of the Pd-AGS, as the produced total volatile fatty acids (VFA) and methane were reduced by 25.8-53.0% and 33.9-87.7%, respectively, comparing to the native AGS. Bio-Pd precipitation resulted in microbial community shift and a decrease in the microbial diversity. The bacterial community suffered more influence than the archaeal community. Hydrogenotrophic methanogens were more sensitive to the toxicity of Pd(II)/Bio-Pd than acetotrophic methanogens. Overall, when the heterogeneous Pd-AGS catalyst is designed to possess both the function of microbial metabolism and Pd catalysis, it is necessary to control a suitable Pd(II) concentration during reduction process and the final Bio-Pd loading in AGS (<4.4 wt% of Pd).
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Affiliation(s)
- Xiangchun Quan
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
| | - Xinrui Wang
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Yu Zheng
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Wanlin Li
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Liang Chen
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Yuansheng Pei
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
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11
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He P, Mao T, Wang A, Yin Y, Shen J, Chen H, Zhang P. Enhanced reductive removal of ciprofloxacin in pharmaceutical wastewater using biogenic palladium nanoparticles by bubbling H2. RSC Adv 2020; 10:26067-26077. [PMID: 35519754 PMCID: PMC9055312 DOI: 10.1039/d0ra03783d] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 07/03/2020] [Indexed: 11/25/2022] Open
Abstract
To treat waste with waste and efficiently remove the organic pollutant, waste palladiums(ii) were adsorbed and reduced on microorganism surface to catalyze the reductive removal of ciprofloxacin in pharmaceutical wastewater. By optimizing conditions such as pH and temperature, the amount of biogenic palladium adsorbed and reduced on E. coli reached 139.48 mg g−1 (Pd/microorganisms). Moreover, most of the Pd(ii) was reduced to nanometer-sized Pd(0) as characterized by TEM and SEM with EDXA. Using the obtained biogenic palladium, the reductive removal of ciprofloxacin is up to 87.70% at 25 °C, 3.03 folds of that achieved in the absence of H2. The results show that waste E. coli microorganisms can efficiently adsorb and remove waste Pd(ii) and produce Bio-Pd nanoparticle catalysts in the presence of H2. This biogenic palladium presents high catalytic activity and great advantages in the reductive degradation of ciprofloxacin. Our method can also be applied to other waste metal ions to prepare the biogenic metals, facilitate their recovery and reuse in degrading organic pollutants in wastewater to achieve “treating waste using waste”. A solution has been successfully introduced to three key challenges from the wastewater containing waste microorganisms, metal and ciprofloxacin, respectively.![]()
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Affiliation(s)
- Peipei He
- College of Materials, Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310014
- P. R. China
| | - Tianyu Mao
- College of Materials, Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310014
- P. R. China
| | - Anming Wang
- College of Materials, Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310014
- P. R. China
| | - Youcheng Yin
- Holistic Integrative Pharmacy Institutes
- College of Medicine
- Hangzhou Normal University
- Hangzhou
- China
| | - Jinying Shen
- College of Materials, Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310014
- P. R. China
| | - Haoming Chen
- College of Materials, Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310014
- P. R. China
| | - Pengfei Zhang
- College of Materials, Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310014
- P. R. China
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12
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Chen Y, Hu K, Chen Y. The effect of biotic and abiotic environmental factors on Pd(II) adsorption and reduction by Bacillus megaterium Y-4. CHEMOSPHERE 2019; 220:1058-1066. [PMID: 33395792 DOI: 10.1016/j.chemosphere.2019.01.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 12/20/2018] [Accepted: 01/02/2019] [Indexed: 06/12/2023]
Abstract
In this study, we screened a new aerobic bacterium (Bacillus megaterium Y-4) that can efficiently reduce Pd(II) with different electron donors. The best electron donor was sodium formate and the best reduction of Pd(II) were by log growth phase cells. The high removal capacity of Pd(II) (1658.3 mg/g) was obtained with 30 mg/L dry cell weight and 50 mg/L Pd (II) in the presence of 5 mM sodium formate. The removal amount of Pd(II) increased with initial Pd(II) concentrations ranging from 50 to 200 mg/L with 100 mg/L Pd(II) being completely removed by 148 mg/L dry cell weight in 6 h. The cell wall, periplasmic space and intracellular contents of B. megaterium Y-4 contains different kinds of enzymes for reducing Pd(II). In addition, the activity of extracellular and periplasmic enzymes was more sensitive to temperature than intracellular enzymes. XRD and XPS analysis revealed that the enzyme for reducing Pd(II) in B. megaterium Y-4 can tolerate a broad range of temperatures (20-60 °C) and pH (2.0-7.0) but was sensitive to oxygen. TEM analysis showed that biogenic palladium nanoparticles (Pd-NPs) were mainly distributed evenly in the periplasmic space of the live cells and were released from cells into aqueous solution, which reduced the toxicity of Pd(II), allowing Pd-NP recovery without cell destruction. B. megaterium Y-4 is a potential bacterium for efficient treatment and reclamation of Pd(II) pollution and formation of Pd-NPs.
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Affiliation(s)
- Yuan Chen
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, Guangdong, PR China.
| | - Keqiang Hu
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, Guangdong, PR China
| | - Yuancai Chen
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, Guangdong, PR China.
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13
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Shi LD, Du JJ, Wang LB, Han YL, Cao KF, Lai CY, Zhao HP. Formation of nanoscale Te 0 and its effect on TeO 32- reduction in CH 4-based membrane biofilm reactor. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 655:1232-1239. [PMID: 30577115 DOI: 10.1016/j.scitotenv.2018.11.337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 11/15/2018] [Accepted: 11/22/2018] [Indexed: 06/09/2023]
Abstract
Formation and recovery of elemental tellurium (Te0) from wastewaters are required by increasing demands and scarce resources. Membrane biofilm reactor (MBfR) using gaseous electron donor has been reported as a low-cost and benign technique to reduce and recover metal (loids). In this study, we demonstrate the feasibility of nanoscale Te0 formation by tellurite (TeO32-) reduction in a CH4-based MBfR. Biogenic Te0 intensively attached on cell surface, within diameters ranging from 10 nm to 30 nm and the hexagonal nanostructure. Along with the Te0 formation, the TeO32- reduction was inhibited. After flushing, biofilm resumed the TeO32- reduction ability, suggesting that the formed nanoscale Te0 might inhibit the reduction by hindering substrate transfer of TeO32- to microbes. The 16S rRNA gene amplicon sequencing revealed that Thermomonas and Hyphomicrobium were possibly responsible for TeO32- reduction since they increased consecutively along with the experiment operation. The PICRUSt (Phylogenetic Investigation of Communities by Reconstruction of Unobserved States) analysis showed that the sulfite reductases were positively correlated with the TeO32- flux, indicating they were potential enzymes involved in reduction process. This study confirms the capability of CH4-based MBfR in tellurium reduction and formation, and provides more techniques for resources recovery and recycles.
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Affiliation(s)
- Ling-Dong Shi
- College of Environmental and Resource Science, Zhejiang University, Hangzhou, China; Zhejiang Prov Key Lab Water Pollut Control & Envi, Zhejiang University, Hangzhou, Zhejiang, China; MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, China
| | - Jia-Jie Du
- College of Environmental and Resource Science, Zhejiang University, Hangzhou, China
| | - Lu-Bin Wang
- College of Environmental and Resource Science, Zhejiang University, Hangzhou, China
| | - Yu-Lin Han
- College of Environmental and Resource Science, Zhejiang University, Hangzhou, China
| | - Ke-Fan Cao
- College of Environmental and Resource Science, Zhejiang University, Hangzhou, China
| | - Chun-Yu Lai
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - He-Ping Zhao
- College of Environmental and Resource Science, Zhejiang University, Hangzhou, China; Zhejiang Prov Key Lab Water Pollut Control & Envi, Zhejiang University, Hangzhou, Zhejiang, China; MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, China.
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14
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Quan X, Wang X, Sun Y, Li W, Chen L, Zhao J. Degradation of diclofenac using palladized anaerobic granular sludge: Effects of electron donor, reaction medium and deactivation factors. JOURNAL OF HAZARDOUS MATERIALS 2019; 365:155-163. [PMID: 30419462 DOI: 10.1016/j.jhazmat.2018.10.100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 10/29/2018] [Accepted: 10/31/2018] [Indexed: 06/09/2023]
Abstract
Biogenic nanopalladium (Bio-Pd) was formed by Anaerobic Granular Sludge (AGS). The Bio-Pd hosted in AGS (Pd-AGS) was used to degrade a pharmaceutical compound diclofenac (DCF) under the conditions of various electron donors, Pd loadings and reaction media. Results showed that hydrogen was the most effective electron donor for the Pd-AGS, followed by formate, glucose and acetate. The Pd-AGS was able to produce effective hydrogen/electron donors from organic compounds via microbial metabolism to initiate Pd activity. Over 96% of DCF (initial concentration of 20 mg L-1) was removed using the Pd-AGS within 90 min, and a maximum specific activity Kobs of 1.53 L g-1 min-1 was obtained at 3.0 wt% Pd loading, in the presence of hydrogen. The Pd-AGS exhibited a relatively high activity in the medium of PBS or Na2SO4 (25 mM) at pH = 7-7.5, but lost activity in the medium of Na2CO3 (40 mM) or NaOH (40 mM). The Pd-AGS was more resistant to deactivation by chloride or sulphide comparing to free Pd nanoparticles. The Pd-AGS could reduce DCF and nitrate simultaneously with high nitrogen selectivity. The Pd-AGS, as a novel form of Pd catalyst with AGS, shows promise for applications in reducing chlorinated organic compounds in contaminated water.
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Affiliation(s)
- Xiangchun Quan
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
| | - Xinrui Wang
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Yue Sun
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Wanlin Li
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Liang Chen
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Jinbo Zhao
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
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15
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Gautam PK, Singh A, Misra K, Sahoo AK, Samanta SK. Synthesis and applications of biogenic nanomaterials in drinking and wastewater treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 231:734-748. [PMID: 30408767 DOI: 10.1016/j.jenvman.2018.10.104] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 10/02/2018] [Accepted: 10/28/2018] [Indexed: 05/02/2023]
Abstract
The continuous increase in water pollution by various organic & inorganic contaminants has become a major issue of concern worldwide. Furthermore, the anthropogenic activities for the manufacturing of various products have boosted this problem manifold. To overcome this serious issue, nanotechnology has initiated to explore various proficient strategies to treat waste water in a more precise and accurate way with the support of various nanomaterials. In recent times, nanosized materials have proved their applicability to provide clean and affordable water treatment technologies. The exclusive features such as high surface area and mechanical properties, greater chemical reactivity, lower cost and energy, efficient regeneration for reuse allow the nanomaterials perfect for water remediation. But the conventional routes of synthesis of nanomaterials encompass the involvement of hazardous and volatile chemicals; therefore the use of nanomaterials further creates the secondary pollution. This issue has intrigued the scientists to develop biogenic pathways and procedures which are environmentally safer and inexpensive. It has led to the new trends that involve developing bio-inspired nano-scale adsorbents and catalysts for the removal and degradation of a wide range of water pollutants. Carbohydrates, proteins, polymers, flavonoids, alkaloids and several antioxidants obtained from plants, bacteria, fungi, and algae have proven their effectiveness as capping and stabilizing agents during manufacture of nanomaterials. Application of biogenic nanomaterials for waste water treatment is relatively newer but rapidly escalating area of research. In the present review, promises and challenges for the synthesis of various biogenic nanomaterials and their potential applications in waste water treatment and/or water purification have been discussed.
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Affiliation(s)
- Pavan Kumar Gautam
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Allahabad 211012, India
| | - Anirudh Singh
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Allahabad 211012, India
| | - Krishna Misra
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Allahabad 211012, India
| | - Amaresh Kumar Sahoo
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Allahabad 211012, India
| | - Sintu Kumar Samanta
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Allahabad 211012, India.
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16
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Ali I, Peng C, Khan ZM, Naz I, Sultan M, Ali M, Abbasi IA, Islam T, Ye T. Overview of microbes based fabricated biogenic nanoparticles for water and wastewater treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 230:128-150. [PMID: 30286344 DOI: 10.1016/j.jenvman.2018.09.073] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 08/14/2018] [Accepted: 09/22/2018] [Indexed: 06/08/2023]
Abstract
Treatment of toxic and emerging pollutants (T&EPs) is increasing the threats to the survival of conventional wastewater treatment (WWTs) technologies. The high installation and operational costs of advanced treatment technologies have shifted the research interest to the development of economical and reliable technology for management of T&EPs. Thus, recently biogenic nanoparticles (BNPs) fabricated using microbes/microorganisms are getting tremendous research interest due to their unique properties (i.e. high specific surface area, desired morphology, catalytic reactivity) for the biodegradation and biosorption of T&EPs. In addition, BNPs can be manufactured using metal contaminated water which indicates a hidden potential for resource recovery and utilization. Therefore, the present study discusses the adsorptive and catalytic performance of BNPs in the removal of T&EPs from water (W) and wastewater (WW). In addition, inspired by the superior performance of BNPs in advance WWT, a model of BNPs based WWT resource recovery and utilization process is also proposed. Finally, main issues i.e. mass production, leaching, poisoning/toxicity, regeneration, reusability and fabrication costs and process optimization are discussed which are main hinders in the transfer of BNPs based WWT technologies from laboratory to commercial scale.
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Affiliation(s)
- Imran Ali
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Changsheng Peng
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China; School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China.
| | - Zahid M Khan
- Department of Agricultural Engineering, Bahauddin Zakariya University, Bosan Road, Multan 60800, Pakistan
| | - Iffat Naz
- Department of Biology, Qassim University, Buraidah 51452, Saudi Arabia
| | - Muhammad Sultan
- Department of Agricultural Engineering, Bahauddin Zakariya University, Bosan Road, Multan 60800, Pakistan.
| | - Mohsin Ali
- Department of Environmental Engineering, Middle East Technical University, Ankara 0600, Turkey
| | - Irfan A Abbasi
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Tariqul Islam
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Tong Ye
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
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17
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Chen Y, Chen Y, Wu J, Zhang J. The effect of biotic and abiotic environmental factors on Pd(II) adsorption and reduction by Bacillus wiedmannii MSM. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 162:546-553. [PMID: 30029100 DOI: 10.1016/j.ecoenv.2018.07.043] [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: 06/07/2018] [Revised: 07/09/2018] [Accepted: 07/10/2018] [Indexed: 06/08/2023]
Abstract
In this paper, we found a bacteria (Bacillus wiedmannii MSM) that could not only culture quickly under aerobic condition, but also can biological reduction of Pd (II) under both aerobic and anaerobic conditions. For reducing Pd (II) by Bacillus wiedmannii MSM, the best electron donor was sodium formate and the best growth time was 24 h (mid-log growth phase cells). TEM indicated that a lot of palladium nanoparticles (Pd-NPs) were mainly located in the periplasmic space of the live cells. However, the autoclaved cells could not synthesize Pd-NPs, which proved the role of enzyme in the reduction of Pd (II). A few of Pd-NPs were only formed on the surface of Cu2+-treated cells, which proved the main but not the only role of periplasmic hydrogenase in the reduction of Pd (II). XRD and XPS also proved that Pd-NPs could be synthesized by live cells over broad ranges of temperature (20-40 °C) and pH (pH 3.0-7.0). This may be especially useful for in situ reduction and remediation of Pd (II) for both anaerobic and aerobic wastewater.
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Affiliation(s)
- Yuan Chen
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, People's Republic of China
| | - Yuancai Chen
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, People's Republic of China.
| | - Jingyi Wu
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, People's Republic of China
| | - Jianyi Zhang
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, People's Republic of China
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18
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Wang PT, Song YH, Fan HC, Yu L. Bioreduction of azo dyes was enhanced by in-situ biogenic palladium nanoparticles. BIORESOURCE TECHNOLOGY 2018; 266:176-180. [PMID: 29966927 DOI: 10.1016/j.biortech.2018.06.079] [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: 05/01/2018] [Revised: 06/20/2018] [Accepted: 06/23/2018] [Indexed: 05/24/2023]
Abstract
Biogenic nanoparticles are promising materials for their green synthesis method and good performance in stimulation on reduction of environmental contaminants. In this study, Pd(0) nanoparticles (bio-Pd) were generated by Klebsiella oxytoca GS-4-08 in fermentative condition and in-situ improved the azo dye reduction. The bio-Pd was mainly located on cell membrane with a size range of 5-20 nm by TEM and XRD data analyses. Anthraquinone-2-disulfonate (AQS) greatly increased the reduction rate of Pd(II) with a reduction efficiency as high as 96.54 ± 0.23% in 24 h. The quinone respiration theory, glucose metabolism and the biohydrogen pathway were used to explain the enhancement mechanism of the in-situ generated bio-Pd on azo dye reduction. These results indicate that the in-situ generated bio-Pd by K. oxytoca strain is efficient for azo dye reduction without complex preparation processes, which is of great significance for the removal and subsequent safe disposal of hazardous environmental compounds.
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Affiliation(s)
- Peng-Tao Wang
- Department of Environmental Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Yu-Hang Song
- Department of Environmental Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Hong-Cheng Fan
- Department of Environmental Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Lei Yu
- Department of Environmental Engineering, Nanjing Forestry University, Nanjing 210037, China; Department of Microbiology, University of Massachusetts Amherst, Amherst, MA 01003, USA.
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19
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Quan X, Zhang X, Sun Y, Zhao J. Iohexol Degradation by Biogenic Palladium Nanoparticles Hosted in Anaerobic Granular Sludge. Front Microbiol 2018; 9:1980. [PMID: 30190713 PMCID: PMC6115513 DOI: 10.3389/fmicb.2018.01980] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Accepted: 08/06/2018] [Indexed: 11/16/2022] Open
Abstract
To improve the degradation ability of anaerobic granular sludge (AGS) toward the iodinated contrast media (ICM) iohexol, biogenic nanoscale palladium (Pd) was formed in AGS via microbial reduction. The Pd hosted in AGS (Pd-AGS) was used for iohexol degradation. The effects of the electron donor, reaction medium, iodide ion fouling, and polymer embedding of the Pd-AGS on the reactivity were investigated. Our results showed the Pd-AGS increased the degradation rate of iohexol, with a conversion rate constant increased by 86.3-fold compared to the AGS control. Various organic compounds were investigated as electron donors to initiate the catalytic activity of Pd-AGS and the promotion achieved with the tested electron donors was in the following order: formate > lactate > ethanol > glucose > acetate. The Pd-AGS had high reactivity in deionized water at mild pH, and almost no reactivity under acidic (pH = 1.2) and alkaline (pH > 11) conditions. The presence of iodide ions in the medium inhibited the catalytic activity of Pd-AGS toward iohexol because of catalyst fouling. Embedding the Pd-AGS in alginate, chitosan, or polyvinyl alcohol (PVA) could prevent Pd loss but it also retarded the iohexol degradation rate. The Pd-AGS, as a combination of Pd catalyst and AGS, provides a novel strategy for iohexol degradation in polluted water and wastewater.
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Affiliation(s)
- Xiangchun Quan
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, China
| | - Xin Zhang
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, China
| | - Yue Sun
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, China
| | - Jinbo Zhao
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, China
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20
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Ghosh S. Copper and palladium nanostructures: a bacteriogenic approach. Appl Microbiol Biotechnol 2018; 102:7693-7701. [PMID: 29998411 DOI: 10.1007/s00253-018-9180-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 06/14/2018] [Accepted: 06/16/2018] [Indexed: 01/25/2023]
Abstract
Copper nanoparticles (CuNPs) and palladium nanoparticles (PdNPs) have attracted wide attention owing to their multifaceted utility in catalysis, sensors, and biomedical applications. Their therapeutic spectrum includes anticancer, antiviral, antibacterial, antifungal, antidiabetic, antioxidant potential which rationalizes the exploration of diverse physical, chemical, and biological routes for fabrication. In this article, we focused on bacterium-assisted design of nanostructured copper and palladium for applications in therapy against multidrug-resistant pathogens, dehalogenation of diatrizoate, Heck coupling of iodobenzene, polymer electric membrane fuel cell, metal recovery, and electronic waste management. Further, hypothesis behind microbial synthesis of PdNPs in E. coli containing [NiFe] hydrogenase Hyd-1 is discussed. Similarly, detailed mechanism of synthesis and stabilization in Cyanobacteria is also documented. Both CuNPs and PdNPs act as potent chemotherapeutic agents that can further be enhanced by conjugation with drugs and/or fluorophores and ligands for simultaneous diagnosis and targeted drug delivery to the cancer site or infection. These bacteriogenic nanoparticles can be used in sensors and pollution control.
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Affiliation(s)
- Sougata Ghosh
- Department of Microbiology, School of Science, RK University, Kasturbadham, Rajkot, Gujarat, 360020, India.
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21
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Yang SA, Nordmeier A, Chidambaram D. Catalytic Activity of Microbially‐formed Palladium Nanoparticles. ELECTROANAL 2017. [DOI: 10.1002/elan.201700530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sarah A. Yang
- Chemical and Materials Engineering University of Nevada, Reno 1664 N. Virginia St. Reno NV 89557-0388 USA
| | - Akira Nordmeier
- Chemical and Materials Engineering University of Nevada, Reno 1664 N. Virginia St. Reno NV 89557-0388 USA
| | - Dev Chidambaram
- Chemical and Materials Engineering University of Nevada, Reno 1664 N. Virginia St. Reno NV 89557-0388 USA
- Nevada Institute for Sustainability University of Nevada, Reno 1664 N. Virginia St. Reno NV 89557-0388 USA
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22
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Kong WQ, Lin JY, He X, Cheng YY, Zhang XS, Deng GZ, Han RS, Wu C. Reduction pathway and mechanism of chloronitrobenzenes synergistically catalyzed by bioPd and Shewanella oneidensis MR-1 assisted by calculation. CHEMOSPHERE 2017; 187:62-69. [PMID: 28841432 DOI: 10.1016/j.chemosphere.2017.07.155] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 06/21/2017] [Accepted: 07/29/2017] [Indexed: 06/07/2023]
Abstract
Although microbial synthesized palladium nanoparticles (bioPd) have been demonstrated to exhibit a great activity toward dechlorination of several chlorinated pollutants, there is no systematic investigation into the substituent effect on dechlorination. Chloronitrobenzenes are widely used for manufacturing and known as persistent pollutants with recalcitrance of biodegradation for nitro groups. In this work, bioPd was synthesized by Shewanella oneidensis MR-1. The dechlorination of 2-chloronitrobenzene, 4-chloronitrobenzene and 2,4-dichloronitrobenzene catalyzed by bioPd were investigated. Simultaneous dechlorination and nitro reduction were observed by synergistic catalysis of bioPd and S. oneidensis MR-1. Pd concentration was optimized for the reduction. Producing profiles of intermediates changed with the ratio of Pd to cell, supporting a size- or shape-controlled catalytic activity of bioPd. The removal of chloro atoms at para-position was easier than that at ortho-position in 2,4-DCNB, suggesting a position effect on the reduction, which was further supported by the frontier molecular orbital and frontier electron density of 2,4-DCNB according to density functional theory.
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Affiliation(s)
- Wan-Qin Kong
- School of Resources and Environmental Engineering, Anhui University, China; Mining Environmental Restoration and Wetland Ecological Security Collaborative Innovation Center, Anhui University, China
| | - Jin-Yu Lin
- School of Resources and Environmental Engineering, Anhui University, China
| | - Xuan He
- School of Resources and Environmental Engineering, Anhui University, China
| | | | - Xue-Sheng Zhang
- School of Resources and Environmental Engineering, Anhui University, China; Mining Environmental Restoration and Wetland Ecological Security Collaborative Innovation Center, Anhui University, China
| | - Guo-Zhi Deng
- School of Resources and Environmental Engineering, Anhui University, China; Mining Environmental Restoration and Wetland Ecological Security Collaborative Innovation Center, Anhui University, China
| | - Rui-Shan Han
- School of Resources and Environmental Engineering, Anhui University, China; Mining Environmental Restoration and Wetland Ecological Security Collaborative Innovation Center, Anhui University, China
| | - Chao Wu
- School of Resources and Environmental Engineering, Anhui University, China; Mining Environmental Restoration and Wetland Ecological Security Collaborative Innovation Center, Anhui University, China.
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23
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Palladium bionanoparticles production from acidic Pd(II) solutions and spent catalyst leachate using acidophilic Fe(III)-reducing bacteria. Extremophiles 2017; 21:1091-1100. [DOI: 10.1007/s00792-017-0969-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 09/25/2017] [Indexed: 10/18/2022]
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24
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Marusak KE, Feng Y, Eben CF, Payne ST, Cao Y, You L, Zauscher S. Cadmium sulphide quantum dots with tunable electronic properties by bacterial precipitation. RSC Adv 2016; 6:76158-76166. [PMID: 28435671 DOI: 10.1039/c6ra13835g] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We present a new method to fabricate semiconducting, transition metal nanoparticles (NPs) with tunable bandgap energies using engineered Escherichia coli. These bacteria overexpress the Treponema denticola cysteine desulfhydrase gene to facilitate precipitation of cadmium sulphide (CdS) NPs. Analysis with transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy reveal that the bacterially precipitated NPs are agglomerates of mostly quantum dots, with diameters that can range from 3 to 15 nm, embedded in a carbon-rich matrix. Additionally, conditions for bacterial CdS precipitation can be tuned to produce NPs with bandgap energies that range from quantum-confined to bulk CdS. Furthermore, inducing precipitation at different stages of bacterial growth allows for control over whether the precipitation occurs intra- or extracellularly. This control can be critically important in utilizing bacterial precipitation for the environmentally-friendly fabrication of functional, electronic and catalytic materials. Notably, the measured photoelectrochemical current generated by these NPs is comparable to values reported in the literature and higher than that of synthesized chemical bath deposited CdS NPs. This suggests that bacterially precipitated CdS NPs have potential for applications ranging from photovoltaics to photocatalysis in hydrogen evolution.
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Affiliation(s)
- K E Marusak
- Department of Mechanical Engineering & Materials Science, 144 Hudson Hall, Box 90300 Durham, NC 27708, United States
| | - Y Feng
- Department of Mechanical Engineering & Materials Science, 144 Hudson Hall, Box 90300 Durham, NC 27708, United States
| | - C F Eben
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Durham NC 27708, United States
| | - S T Payne
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Durham NC 27708, United States
| | - Y Cao
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Durham NC 27708, United States
| | - L You
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Durham NC 27708, United States
| | - S Zauscher
- Department of Mechanical Engineering & Materials Science, 144 Hudson Hall, Box 90300 Durham, NC 27708, United States
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25
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Moon JW, Phelps TJ, Fitzgerald Jr CL, Lind RF, Elkins JG, Jang GG, Joshi PC, Kidder M, Armstrong BL, Watkins TR, Ivanov IN, Graham DE. Manufacturing demonstration of microbially mediated zinc sulfide nanoparticles in pilot-plant scale reactors. Appl Microbiol Biotechnol 2016; 100:7921-31. [DOI: 10.1007/s00253-016-7556-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 04/06/2016] [Accepted: 04/14/2016] [Indexed: 10/21/2022]
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Zhou C, Ontiveros-Valencia A, Wang Z, Maldonado J, Zhao HP, Krajmalnik-Brown R, Rittmann BE. Palladium Recovery in a H2-Based Membrane Biofilm Reactor: Formation of Pd(0) Nanoparticles through Enzymatic and Autocatalytic Reductions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:2546-2555. [PMID: 26883809 DOI: 10.1021/acs.est.5b05318] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Recovering palladium (Pd) from waste streams opens up the possibility of augmenting the supply of this important catalyst. We evaluated Pd reduction and recovery as a novel application of a H2-based membrane biofilm reactor (MBfR). At steady states, over 99% of the input soluble Pd(II) was reduced through concomitant enzymatic and autocatalytic processes at acidic or near neutral pHs. Nanoparticulate Pd(0), at an average crystallite size of 10 nm, was recovered with minimal leaching and heterogeneously associated with microbial cells and extracellular polymeric substances in the biofilm. The dominant phylotypes potentially responsible for Pd(II) reduction at circumneutral pH were denitrifying β-proteobacteria mainly consisting of the family Rhodocyclaceae. Though greatly shifted by acidic pH, the biofilm microbial community largely bounced back when the pH was returned to 7 within 2 weeks. These discoveries infer that the biofilm was capable of rapid adaptive evolution to stressed environmental change, and facilitated Pd recovery in versatile ways. This study demonstrates the promise of effective microbially driven Pd recovery in a single MBfR system that could be applied for the treatment of the waste streams, and it documents the role of biofilms in this reduction and recovery process.
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Affiliation(s)
- Chen Zhou
- Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States
| | - Aura Ontiveros-Valencia
- Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States
| | - Zhaocheng Wang
- Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States
- Department of Water Engineering and Science, College of Civil Engineering, Hunan University , Changsha, China
| | - Juan Maldonado
- Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States
| | - He-Ping Zhao
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University , Hangzhou, China
| | - Rosa Krajmalnik-Brown
- Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States
| | - Bruce E Rittmann
- Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States
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Pat-Espadas AM, Field JA, Otero-Gonzalez L, Razo-Flores E, Cervantes FJ, Sierra-Alvarez R. Recovery of palladium(II) by methanogenic granular sludge. CHEMOSPHERE 2016; 144:745-753. [PMID: 26408982 DOI: 10.1016/j.chemosphere.2015.09.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 08/25/2015] [Accepted: 09/08/2015] [Indexed: 06/05/2023]
Abstract
This is the first report that demonstrates the ability of anaerobic methanogenic granular sludge to reduce Pd(II) to Pd(0). Different electron donors were evaluated for their effectiveness in promoting Pd reduction. Formate and H2 fostered both chemically and biologically mediated Pd reduction. Ethanol only promoted the reduction of Pd(II) under biotic conditions and the reduction was likely mediated by H2 released from ethanol fermentation. No reduction was observed in biotic or abiotic assays with all other substrates tested (acetate, lactate and pyruvate) although a large fraction of the total Pd was removed from the liquid medium likely due to biosorption. Pd(II) displayed severe inhibition towards acetoclastic and hydrogenotrophic methanogens, as indicated by 50% inhibiting concentrations as low as 0.96 and 2.7 mg/L, respectively. The results obtained indicate the potential of utilizing anaerobic granular sludge bioreactor technology as a practical and promising option for Pd(II) reduction and recovery offering advantages over pure cultures.
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Affiliation(s)
- Aurora M Pat-Espadas
- Department of Chemical and Environmental Engineering, University of Arizona, P.O. Box 210011, Tucson, AZ, 85721, USA; División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, Camino a la Presa San José 2055, Col. Lomas 4ª. Sección, C. P. 78216, San Luis Potosí, SLP, Mexico.
| | - James A Field
- Department of Chemical and Environmental Engineering, University of Arizona, P.O. Box 210011, Tucson, AZ, 85721, USA
| | - Lila Otero-Gonzalez
- Department of Chemical and Environmental Engineering, University of Arizona, P.O. Box 210011, Tucson, AZ, 85721, USA
| | - Elías Razo-Flores
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, Camino a la Presa San José 2055, Col. Lomas 4ª. Sección, C. P. 78216, San Luis Potosí, SLP, Mexico
| | - Francisco J Cervantes
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, Camino a la Presa San José 2055, Col. Lomas 4ª. Sección, C. P. 78216, San Luis Potosí, SLP, Mexico
| | - Reyes Sierra-Alvarez
- Department of Chemical and Environmental Engineering, University of Arizona, P.O. Box 210011, Tucson, AZ, 85721, USA
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Abstract
Due to their catalytic activity, biogenic synthesis of Pd nanparticles is of significant importance.
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Affiliation(s)
- Farah Qazi
- School of Chemical and Materials Engineering (SCME)
- National University of Sciences & Technology (NUST)
- 44000 Islamabad
- Pakistan
| | - Zakir Hussain
- School of Chemical and Materials Engineering (SCME)
- National University of Sciences & Technology (NUST)
- 44000 Islamabad
- Pakistan
| | - Muhammad Nawaz Tahir
- Institute of Inorganicand Analytical Chemistry
- Johannes Gutenberg-University of Mainz
- Mainz
- Germany
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29
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Anode decoration with biogenic Pd nanoparticles improved power generation in microbial fuel cells. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.09.157] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Immobilization of biogenic Pd(0) in anaerobic granular sludge for the biotransformation of recalcitrant halogenated pollutants in UASB reactors. Appl Microbiol Biotechnol 2015; 100:1427-1436. [PMID: 26481621 DOI: 10.1007/s00253-015-7055-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 09/23/2015] [Accepted: 09/29/2015] [Indexed: 12/14/2022]
Abstract
The capacity of anaerobic granular sludge to reduce Pd(II), using ethanol as electron donor, in an upflow anaerobic sludge blanket (UASB) reactor was demonstrated. Results confirmed complete reduction of Pd(II) and immobilization as Pd(0) in the granular sludge. The Pd-enriched sludge was further evaluated regarding biotransformation of two recalcitrant halogenated pollutants: 3-chloro-nitrobenzene (3-CNB) and iopromide (IOP) in batch and continuous operation in UASB reactors. The superior removal capacity of the Pd-enriched biomass when compared with the control (not exposed to Pd) was demonstrated in both cases. Results revealed 80 % of IOP removal efficiency after 100 h of incubation in batch experiments performed with Pd-enriched biomass whereas only 28 % of removal efficiency was achieved in incubations with biomass lacking Pd. The UASB reactor operated with the Pd-enriched biomass achieved 81 ± 9.5 % removal efficiency of IOP and only 61 ± 8.3 % occurred in the control reactor lacking Pd. Regarding 3-CNB, it was demonstrated that biogenic Pd(0) promoted both nitro-reduction and dehalogenation resulting in the complete conversion of 3-CNB to aniline while in the control experiment only nitro-reduction was documented. The complete biotransformation pathway of both contaminants was proposed by high-performance liquid chromatography-mass spectrometry (HPLC-MS) analysis evidencing a higher degree of nitro-reduction and dehalogenation of both contaminants in the experiments with Pd-enriched anaerobic sludge as compared with the control. A biotechnological process is proposed to recover Pd(II) from industrial streams and to immobilize it in anaerobic granular sludge. The Pd-enriched biomass is also proposed as a biocatalyst to achieve the biotransformation of recalcitrant compounds in UASB reactors.
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Quan X, Zhang X, Xu H. In-situ formation and immobilization of biogenic nanopalladium into anaerobic granular sludge enhances azo dyes degradation. WATER RESEARCH 2015; 78:74-83. [PMID: 25912251 DOI: 10.1016/j.watres.2015.03.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 03/22/2015] [Accepted: 03/24/2015] [Indexed: 06/04/2023]
Abstract
Azo dyes are toxic and recalcitrant wastewater pollutants. An innovative technology based on biogenic nanopalladium (Bio-Pd) supported anaerobic granular sludge (AGS) was developed for azo dyes reduction. In-situ formation of Bio-Pd in the AGS was observed by Scanning Electron Microscopy coupled with Energy Dispersive Spectrometer (SEM-EDS). The Pd associated AGS (Pd-AGS) showed enhanced decolorization rates to the three azo dyes of Congo Red, Evans Blue and Orange II, with the degradation kinetic constants increased by 2.3-10 fold compared to the control AGS in the presence of electron donor formate. Impacts of different electron donors on Orange II decolorization were further investigated. Results showed that formic acid, formate, acetate, glucose, ethanol and lactate could serve as electron and hydrogen donors to stimulate Orange II decolorization by the Pd-AGS, and their activities followed the order: formic acid > formate > ethanol > glucose > lactate > acetate. Most of the Bio-Pd was bound with microbes in the AGS with a small fraction in the extracellular polymer substances (EPS). Transmission Electronic Microscopy analysis revealed that the Bio-Pd formed in the periplasmic space, cytoplasm and on the cell walls of bacteria. This study provides a new concept for azo dye reduction, which couples sludge microbial degradation ability with Bio-Pd catalytic ability via in-situ formation and immobilization of Bio-Pd into AGS, and offers an alternative for the current azo dye treatment technology.
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Affiliation(s)
- Xiangchun Quan
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
| | - Xin Zhang
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Hengduo Xu
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
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Shen N, Xia XY, Chen Y, Zheng H, Zhong YC, Zeng RJ. Palladium nanoparticles produced and dispersed by Caldicellulosiruptor saccharolyticus enhance the degradation of contaminants in water. RSC Adv 2015. [DOI: 10.1039/c4ra14991b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study focused on examining the general applicability of coupling bio-palladium (Pd) nanoparticle generation and bio-H2 produced by Caldicellulosiruptor saccharolyticus for wastewater treatment under extreme thermophilic conditions.
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Affiliation(s)
- Nan Shen
- CAS Key Laboratory for Urban Pollutant Conversion
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Xiu-Yang Xia
- CAS Key Laboratory for Urban Pollutant Conversion
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Yun Chen
- CAS Key Laboratory for Urban Pollutant Conversion
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Hang Zheng
- School of Earth Sciences
- The University of Queensland
- St Lucia 4072
- Australia
| | - Yong-Chen Zhong
- Jiansu Zhongheng Architectural D&R Institute Co. Ltd
- Yangzhou
- People's Republic of China
| | - Raymond J. Zeng
- CAS Key Laboratory for Urban Pollutant Conversion
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- People's Republic of China
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33
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Comparative evaluation of fermentative hydrogen production using Enterobacter cloacae and mixed culture: Effect of Pd (II) ion and phytogenic palladium nanoparticles. J Biotechnol 2014; 192 Pt A:87-95. [DOI: 10.1016/j.jbiotec.2014.10.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 09/06/2014] [Accepted: 10/10/2014] [Indexed: 11/22/2022]
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Lei B, Zhang X, Zhu M, Tan W. Effect of fluid shear stress on catalytic activity of biopalladium nanoparticles produced by Klebsiella Pneumoniae ECU-15 on Cr(VI) reduction reaction. BIORESOUR BIOPROCESS 2014. [DOI: 10.1186/s40643-014-0028-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Biopalladium (bioPd(0)) nanoparticles on Klebsiella Pneumoniae ECU-15 were synthesized mainly on the microorganism's surface. Data suggest that the resistance of mass transfer around the cell surface region plays a critical role in bioPd(0) synthesis process. However, the mechanisms for its role remains elusive.
Results
The experimental results indicated that 1) diffusion resistance existed around the microorganism's cell in reaction vessel and 2) fluid shear stress affected the mass transfer rates differently according to its strength and thus had varying effects on the bioPd(0) synthesis. More than 97.9 ± 1.5% Chromium(VI)(Cr(VI)) (384 μM) was reduced to Cr(III) within 20 min with 5% Pd/bioPd(0) as catalyst, which was generated by the K. Pneumoniae ECU-15, and the catalytic performance of Pd/bioPd(0) was stable over 6 months. The optimal condition of bioreduction of Pd(II) to Pd(0) was determined at the Kolmogorov eddy length of 7.33 ± 0.5 μm and lasted for 1 h in the extended reduction process after the usual adsorption and reduction process.
Conclusions
It is concluded that a high bioPd(0) catalytic activity can be achieved by controlling the fluid shear stress intensity in an extended reduction process in the bioreactor.
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35
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Suja E, Nancharaiah YV, Venugopalan VP. Biogenic nanopalladium production by self-immobilized granular biomass: application for contaminant remediation. WATER RESEARCH 2014; 65:395-401. [PMID: 25223898 DOI: 10.1016/j.watres.2014.08.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 07/30/2014] [Accepted: 08/05/2014] [Indexed: 06/03/2023]
Abstract
Microbial granules cultivated in an aerobic bubble column sequencing batch reactor were used for reduction of Pd(II) and formation of biomass associated Pd(0) nanoparticles (Bio-Pd) for reductive transformation of organic and inorganic contaminants. Addition of Pd(II) to microbial granules incubated under fermentative conditions resulted in rapid formation of Bio-Pd. The reduction of soluble Pd(II) to biomass associated Pd(0) was predominantly mediated by H2 produced through fermentation. X-ray diffraction and scanning electron microscope analysis revealed that the produced Pd nanoparticles were associated with the microbial granules. The catalytic activity of Bio-Pd was determined using p-nitrophenol and Cr(VI) as model compounds. Reductive transformation of p-nitrophenol by Bio-Pd was ∼20 times higher in comparison to microbial granules without Pd. Complete reduction of up to 0.25 mM of Cr(VI) by Bio-Pd was achieved in 24 h. Bio-Pd synthesis using self-immobilized microbial granules is advantageous and obviates the need for nanoparticle encapsulation or use of barrier membranes for retaining Bio-Pd in practical applications. In short, microbial granules offer a dual purpose system for Bio-Pd production and retention, wherein in situ generated H2 serves as electron donor powering biotransformations.
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Affiliation(s)
- E Suja
- Biofouling and Biofilm Processes Section, Water and Steam Chemistry Division, Chemistry Group, Bhabha Atomic Research Centre, Kalpakkam 603102, Tamil Nadu, India
| | - Y V Nancharaiah
- Biofouling and Biofilm Processes Section, Water and Steam Chemistry Division, Chemistry Group, Bhabha Atomic Research Centre, Kalpakkam 603102, Tamil Nadu, India
| | - V P Venugopalan
- Biofouling and Biofilm Processes Section, Water and Steam Chemistry Division, Chemistry Group, Bhabha Atomic Research Centre, Kalpakkam 603102, Tamil Nadu, India.
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36
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Hosseinkhani B, Hennebel T, Boon N. Potential of biogenic hydrogen production for hydrogen driven remediation strategies in marine environments. N Biotechnol 2014; 31:445-50. [PMID: 24830949 DOI: 10.1016/j.nbt.2014.04.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 04/17/2014] [Accepted: 04/21/2014] [Indexed: 11/25/2022]
Abstract
Fermentative production of bio-hydrogen (bio-H2) from organic residues has emerged as a promising alternative for providing the required electron source for hydrogen driven remediation strategies. Unlike the widely used production of H2 by bacteria in fresh water systems, few reports are available regarding the generation of biogenic H2 and optimisation processes in marine systems. The present research aims to optimise the capability of an indigenous marine bacterium for the production of bio-H2 in marine environments and subsequently develop this process for hydrogen driven remediation strategies. Fermentative conversion of organics in marine media to H2 using a marine isolate, Pseudoalteromonas sp. BH11, was determined. A Taguchi design of experimental methodology was employed to evaluate the optimal nutritional composition in batch tests to improve bio-H2 yields. Further optimisation experiments showed that alginate-immobilised bacterial cells were able to produce bio-H2 at the same rate as suspended cells over a period of several weeks. Finally, bio-H2 was used as electron donor to successfully dehalogenate trichloroethylene (TCE) using biogenic palladium nanoparticles as a catalyst. Fermentative production of bio-H2 can be a promising technique for concomitant generation of an electron source for hydrogen driven remediation strategies and treatment of organic residue in marine ecosystems.
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Affiliation(s)
- Baharak Hosseinkhani
- Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Coupure Links 653, Gent B-9000, Belgium; BIOMED, University of Hasselt, Agoralaan Building C, Diepenbeek, Belgium
| | - Tom Hennebel
- Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Coupure Links 653, Gent B-9000, Belgium; Department of Civil and Environmental Engineering, University of California at Berkeley, Berkeley, CA 94720, USA
| | - Nico Boon
- Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Coupure Links 653, Gent B-9000, Belgium.
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37
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Redeker M, Wick A, Meermann B, Ternes TA. Removal of the iodinated X-ray contrast medium diatrizoate by anaerobic transformation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:10145-10154. [PMID: 25140788 DOI: 10.1021/es5014714] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The iodinated X-ray contrast medium diatrizoate is known to be very persistent in current wastewater treatment as well as in environmental compartments. In this study, the potential of anaerobic processes in soils, sediments, and during wastewater treatment to remove and transform diatrizoate was investigated. In anaerobic batch experiments with soil and sediment seven biologically formed transformation products (TPs) as well as the corresponding transformation pathway were identified. The TPs resulted from successive deiodinations and deacetylations. The final TP 3,5-diaminobenzoic acid (DABA) was stable under anaerobic conditions. However, DABA was further transformed under air atmosphere, indicating the potential for the mineralization of diatrizoate by combining anaerobic and aerobic conditions. With the development of a methodology using complementary liquid chromatography-electrospray ionization-tandem mass spectrometry and liquid chromatography-inductively coupled plasma-mass spectrometry techniques, all identified TPs were quantified and the mass balance could be closed without having authentic standards for four of the TPs available. The detection and quantification of diatrizoate TPs in groundwater, in technical wetlands with anaerobic zones, and in a pilot wastewater treatment plant established for anaerobic treatment highlights the transferability and up-scaling of the results attained by laboratory experiments to environmental conditions.
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Affiliation(s)
- Maria Redeker
- Federal Institute of Hydrology (BfG) , Am Mainzer Tor 1, D-56068, Koblenz, Germany
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38
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Hosseinkhani B, Hennebel T, Van Nevel S, Verschuere S, Yakimov MM, Cappello S, Blaghen M, Boon N. Biogenic nanopalladium based remediation of chlorinated hydrocarbons in marine environments. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 48:550-557. [PMID: 24350777 DOI: 10.1021/es403047u] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Biogenic catalysts have been studied over the last 10 years in freshwater and soil environments, but neither their formation nor their application has been explored in marine ecosystems. The objective of this study was to develop a biogenic nanopalladium-based remediation method for reducing chlorinated hydrocarbons from marine environments by employing indigenous marine bacteria. Thirty facultative aerobic marine strains were isolated from two contaminated sites, the Lagoon of Mar Chica, Morocco, and Priolo Gargallo Syracuse, Italy. Eight strains showed concurrent palladium precipitation and biohydrogen production. X-ray diffraction and thin section transmission electron microscopy analysis indicated the presence of metallic Pd nanoparticles of various sizes (5-20 nm) formed either in the cytoplasm, in the periplasmic space, or extracellularly. These biogenic catalysts were used to dechlorinate trichloroethylene in simulated marine environments. Complete dehalogenation of 20 mg L(-1) trichloroethylene was achieved within 1 h using 50 mg L(-1) biogenic nanopalladium. These biogenic nanoparticles are promising developments for future marine bioremediation applications.
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Affiliation(s)
- Baharak Hosseinkhani
- Laboratory of Microbial Ecology and Technology (LabMET), Ghent University , Coupure Links 653, B-9000 Gent, Belgium
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39
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Pereira L, Mehboob F, Stams AJM, Mota MM, Rijnaarts HHM, Alves MM. Metallic nanoparticles: microbial synthesis and unique properties for biotechnological applications, bioavailability and biotransformation. Crit Rev Biotechnol 2013; 35:114-28. [DOI: 10.3109/07388551.2013.819484] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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40
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Li J, Lin S, Wang J, Jia S, Yang M, Hao Z, Zhang X, Chen PR. Ligand-Free Palladium-Mediated Site-Specific Protein Labeling Inside Gram-Negative Bacterial Pathogens. J Am Chem Soc 2013; 135:7330-8. [DOI: 10.1021/ja402424j] [Citation(s) in RCA: 123] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Jie Li
- Synthetic and Functional Biomolecules
Center, Beijing National Laboratory for Molecular Sciences, Department
of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Shixian Lin
- Synthetic and Functional Biomolecules
Center, Beijing National Laboratory for Molecular Sciences, Department
of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Jie Wang
- Synthetic and Functional Biomolecules
Center, Beijing National Laboratory for Molecular Sciences, Department
of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Shang Jia
- Synthetic and Functional Biomolecules
Center, Beijing National Laboratory for Molecular Sciences, Department
of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Maiyun Yang
- Synthetic and Functional Biomolecules
Center, Beijing National Laboratory for Molecular Sciences, Department
of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Ziyang Hao
- Synthetic and Functional Biomolecules
Center, Beijing National Laboratory for Molecular Sciences, Department
of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xiaoyu Zhang
- College of Chemistry and Chemical
Engineering, Lanzhou University, Lanzhou
730000, China
| | - Peng R. Chen
- Synthetic and Functional Biomolecules
Center, Beijing National Laboratory for Molecular Sciences, Department
of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Sciences, Beijing, China
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41
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Tuo Y, Liu G, Zhou J, Wang A, Wang J, Jin R, Lv H. Microbial formation of palladium nanoparticles by Geobacter sulfurreducens for chromate reduction. BIORESOURCE TECHNOLOGY 2013; 133:606-611. [PMID: 23453979 DOI: 10.1016/j.biortech.2013.02.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2012] [Revised: 01/09/2013] [Accepted: 02/03/2013] [Indexed: 06/01/2023]
Abstract
Geobacter sulfurreducens was studied for the reduction of Pd(II) and production of Pd(0) nanoparticles capable of reducing Cr(VI). Transmission electronic microscopy, energy dispersive X-ray and X-ray diffraction analyses revealed that the nanoscale Pd(0) particles formed were associated with the cell surface and located inside the periplasm. The increase of cell dry weight (CDW):Pd ratio and addition of anthraquinone-2,6-disulfonate (AQDS) not only stimulated Pd(II) reduction, but also resulted in increase of nanoparticle number, decrease of particle diameter and improvement of Cr(VI) reduction efficiency. The relationship between reduction rate and initial Cr(VI) concentration (150-750 μM) followed Michaelis-Menten kinetics (Vmax=3.6 μmol h(-1) mg bio-Pd(-1) and Km=891.3 μM). These findings indicated the potential of using G. sulfurreducens cells for reclamation of palladium, formation of Pd(0) nanoparticles and efficient treatment of Cr(VI) pollution.
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Affiliation(s)
- Ya Tuo
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
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De Corte S, Bechstein S, Lokanathan AR, Kjems J, Boon N, Meyer RL. Comparison of bacterial cells and amine-functionalized abiotic surfaces as support for Pd nanoparticle synthesis. Colloids Surf B Biointerfaces 2013; 102:898-904. [DOI: 10.1016/j.colsurfb.2012.08.045] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 08/16/2012] [Accepted: 08/28/2012] [Indexed: 11/26/2022]
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De Corte S, Sabbe T, Hennebel T, Vanhaecke L, De Gusseme B, Verstraete W, Boon N. Doping of biogenic Pd catalysts with Au enables dechlorination of diclofenac at environmental conditions. WATER RESEARCH 2012; 46:2718-2726. [PMID: 22406286 DOI: 10.1016/j.watres.2012.02.036] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 02/14/2012] [Accepted: 02/16/2012] [Indexed: 05/31/2023]
Abstract
By using the metal reducing capacities of bacteria, Pd nanoparticles can be produced in a sustainable way ('bio-Pd'). These bio-Pd nanoparticles can be used as a catalyst in, for example, dehalogenation reactions. However, some halogenated compounds are not efficiently degraded using a bio-Pd catalyst. This study shows that the activity of bio-Pd can be improved by doping with Au(0) ('bio-Pd/Au'). In contrast with bio-Pd, bio-Pd/Au could perform the removal of the model pharmaceutical compound diclofenac from an aqueous medium in batch experiments at neutral pH and with H(2) as the hydrogen donor (first order decay constant of 0.078 ± 0.009 h(-1)). Dehalogenation was for both catalysts the only observed reaction. For bio-Pd/Au, a disproportional increase of catalytic activity was observed with increasing Pd-content of the catalyst. In contrast, when varying the Au-content of the catalyst, a Pd/Au mass ratio of 50/1 showed the highest catalytic activity (first order decay value of 0.52 ± 0.02 h(-1)). The removal of 6.40 μg L(-1) diclofenac from a wastewater treatment plant effluent using bio-Pd was not possible even after prolonged reaction time. However, by using the most active bio-Pd/Au catalyst, 43.8 ± 0.5% of the initially present diclofenac could be removed after 24 h. This study shows that doping of bio-Pd nanoparticles with Au(0) can be a promising approach for the reductive treatment of wastewaters containing halogenated contaminants.
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Affiliation(s)
- Simon De Corte
- Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Coupure Links 653, B-9000 Gent, Belgium
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Hennebel T, De Corte S, Verstraete W, Boon N. Microbial production and environmental applications of Pd nanoparticles for treatment of halogenated compounds. Curr Opin Biotechnol 2012; 23:555-61. [PMID: 22321940 DOI: 10.1016/j.copbio.2012.01.007] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Accepted: 01/16/2012] [Indexed: 11/19/2022]
Abstract
New biological inspired methods were recently developed to recover precious metals from waste streams and to concomitantly produce palladium nanoparticles on bacteria, that is, bio-Pd. This technology offers a variety of opportunities, as the process can considered to be green, tunable, affordable and scalable. The nanoparticle formation and the specific role of the bacteria in the reclamation process are highlighted. The effective performance of bio-Pd as catalyst in dehalogenation reactions, as well as in hydrogenation, reduction and CC coupling reactions has been extensively described in literature. Especially dehalogenation of environmental contaminants represents a promising market for application of bio-Pd. Therefore, several treatment technologies based on bio-Pd in the different environmental compartments are considered and domains, in which bio-Pd can be used at full scale are described. Finally, the perspectives for implementation of the bio-Pd technology in the future are set forward.
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Affiliation(s)
- Tom Hennebel
- Laboratory of Microbial Ecology and Technology, Department of Biochemical and Microbial Technology, Ghent University, Coupure Links 653, B-9000 Gent, Belgium
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De Corte S, Hennebel T, De Gusseme B, Verstraete W, Boon N. Bio-palladium: from metal recovery to catalytic applications. Microb Biotechnol 2012; 5:5-17. [PMID: 21554561 PMCID: PMC3815268 DOI: 10.1111/j.1751-7915.2011.00265.x] [Citation(s) in RCA: 116] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Accepted: 03/22/2011] [Indexed: 11/29/2022] Open
Abstract
While precious metals are available to a very limited extent, there is an increasing demand to use them as catalyst. This is also true for palladium (Pd) catalysts and their sustainable recycling and production are required. Since Pd catalysts exist nowadays mostly under the form of nanoparticles, these particles need to be produced in an environment-friendly way. Biological synthesis of Pd nanoparticles ('bio-Pd') is an innovative method for both metal recovery and nanocatalyst synthesis. This review will discuss the different bio-Pd precipitating microorganisms, the applications of the catalyst (both for environmental purposes and in organic chemistry) and the state of the art of the reactors based on the bio-Pd concept. In addition, some main challenges are discussed, which need to be overcome in order to create a sustainable nanocatalyst. Finally, some outlooks for bio-Pd in environmental technology are presented.
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Affiliation(s)
| | | | | | | | - Nico Boon
- Department of Biochemical and Microbial Technology, Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Coupure Links 653, B‐9000 Gent, Belgium
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De Corte S, Hennebel T, Fitts JP, Sabbe T, Bliznuk V, Verschuere S, van der Lelie D, Verstraete W, Boon N. Biosupported bimetallic Pd-Au nanocatalysts for dechlorination of environmental contaminants. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:8506-8513. [PMID: 21877727 DOI: 10.1021/es2019324] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Biologically produced monometallic palladium nanoparticles (bio-Pd) have been shown to catalyze the dehalogenation of environmental contaminants, but fail to efficiently catalyze the degradation of other important recalcitrant halogenated compounds. This study represents the first report of biologically produced bimetallic Pd/Au nanoparticle catalysts. The obtained catalysts were tested for the dechlorination of diclofenac and trichlorethylene. When aqueous bivalent Pd(II) and trivalent Au(III) ions were both added to concentrations of 50 mg L(-1) and reduced simultaneously by Shewanella oneidensis in the presence of H(2), the resulting cell-associated bimetallic nanoparticles (bio-Pd/Au) were able to dehalogenate 78% of the initially added diclofenac after 24 h; in comparison, no dehalogenation was observed using monometallic bio-Pd or bio-Au. Other catalyst-synthesis strategies did not show improved dehalogenation of TCE and diclofenac compared with bio-Pd. Synchrotron-based X-ray diffraction, (scanning) transmission electron microscopy and energy dispersive X-ray spectroscopy indicated that the simultaneous reduction of Pd and Au supported on cells of S. oneidensis resulted in the formation of a unique bimetallic crystalline structure. This study demonstrates that the catalytic activity and functionality of possibly environmentally more benign biosupported Pd-catalysts can be improved by coprecipitation with Au.
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Affiliation(s)
- Simon De Corte
- Laboratory of Microbial Ecology and Technology (LabMET), Ghent University , Coupure Links 653, B-9000 Gent, Belgium
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