1
|
Hui CY, Ma BC, Hu SY, Wu C. Tailored bacteria tackling with environmental mercury: Inspired by natural mercuric detoxification operons. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 341:123016. [PMID: 38008253 DOI: 10.1016/j.envpol.2023.123016] [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: 08/01/2023] [Revised: 10/30/2023] [Accepted: 11/19/2023] [Indexed: 11/28/2023]
Abstract
Mercury (Hg) and its inorganic and organic compounds significantly threaten the ecosystem and human health. However, the natural and anthropogenic Hg environmental inputs exceed 5000 metric tons annually. Hg is usually discharged in elemental or ionic forms, accumulating in surface water and sediments where Hg-methylating microbes-mediated biotransformation occurs. Microbial genetic factors such as the mer operon play a significant role in the complex Hg biogeochemical cycle. Previous reviews summarize the fate of environmental Hg, its biogeochemistry, and the mechanism of bacterial Hg resistance. This review mainly focuses on the mer operon and its components in detecting, absorbing, bioaccumulating, and detoxifying environmental Hg. Four components of the mer operon, including the MerR regulator, divergent mer promoter, and detoxification factors MerA and MerB, are rare bio-parts for assembling synthetic bacteria, which tackle pollutant Hg. Bacteria are designed to integrate synthetic biology, protein engineering, and metabolic engineering. In summary, this review highlights that designed bacteria based on the mer operon can potentially sense and bioremediate pollutant Hg in a green and low-cost manner.
Collapse
Affiliation(s)
- Chang-Ye Hui
- Shenzhen Prevention and Treatment Center for Occupational Diseases, 2019 Buxin Road, Shenzhen, 518020, China.
| | - Bing-Chan Ma
- Shenzhen Prevention and Treatment Center for Occupational Diseases, 2019 Buxin Road, Shenzhen, 518020, China; School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, China
| | - Shun-Yu Hu
- Shenzhen Prevention and Treatment Center for Occupational Diseases, 2019 Buxin Road, Shenzhen, 518020, China; Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou, 510515, China
| | - Can Wu
- Shenzhen Prevention and Treatment Center for Occupational Diseases, 2019 Buxin Road, Shenzhen, 518020, China; Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou, 510515, China
| |
Collapse
|
2
|
Dell'Anno F, Joaquim van Zyl L, Trindade M, Buschi E, Cannavacciuolo A, Pepi M, Sansone C, Brunet C, Ianora A, de Pascale D, Golyshin PN, Dell'Anno A, Rastelli E. Microbiome enrichment from contaminated marine sediments unveils novel bacterial strains for petroleum hydrocarbon and heavy metal bioremediation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 317:120772. [PMID: 36455775 DOI: 10.1016/j.envpol.2022.120772] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/24/2022] [Accepted: 11/26/2022] [Indexed: 06/17/2023]
Abstract
Petroleum hydrocarbons and heavy metals are some of the most widespread contaminants affecting marine ecosystems, urgently needing effective and sustainable remediation solutions. Microbial-based bioremediation is gaining increasing interest as an effective, economically and environmentally sustainable strategy. Here, we hypothesized that the heavily polluted coastal area facing the Sarno River mouth, which discharges >3 tons of polycyclic aromatic hydrocarbons (PAHs) and ∼15 tons of heavy metals (HMs) into the sea annually, hosts unique microbiomes including marine bacteria useful for PAHs and HMs bioremediation. We thus enriched the microbiome of marine sediments, contextually selecting for HM-resistant bacteria. The enriched mixed bacterial culture was subjected to whole-DNA sequencing, metagenome-assembled-genomes (MAGs) annotation, and further sub-culturing to obtain the major bacterial species as pure strains. We obtained two novel isolates corresponding to the two most abundant MAGs (Alcanivorax xenomutans strain-SRM1 and Halomonas alkaliantarctica strain-SRM2), and tested their ability to degrade PAHs and remove HMs. Both strains exhibited high PAHs degradation (60-100%) and HMs removal (21-100%) yield, and we described in detail >60 genes in their MAGs to unveil the possible genetic basis for such abilities. Most promising yields (∼100%) were obtained towards naphthalene, pyrene and lead. We propose these novel bacterial strains and related genetic repertoire to be further exploited for effective bioremediation of marine environments contaminated with both PAHs and HMs.
Collapse
Affiliation(s)
- Filippo Dell'Anno
- Department of Marine Biotechnology, Stazione Zoologica "Anton Dohrn", Villa Comunale, 80121, Naples, Italy.
| | - Leonardo Joaquim van Zyl
- Department of Biotechnology, Institute for Microbial Biotechnology and Metagenomics, University of the Western Cape, Bellville, 7535, Cape Town, South Africa.
| | - Marla Trindade
- Department of Biotechnology, Institute for Microbial Biotechnology and Metagenomics, University of the Western Cape, Bellville, 7535, Cape Town, South Africa.
| | - Emanuela Buschi
- Department of Marine Biotechnology, Stazione Zoologica "Anton Dohrn", Fano Marine Centre, Viale Adriatico 1-N, 61032, Fano, Italy.
| | - Antonio Cannavacciuolo
- Department of Integrative Marine Ecology, Stazione Zoologica "Anton Dohrn", Fano Marine Centre, Viale Adriatico 1-N, 61032, Fano, Italy.
| | - Milva Pepi
- Department of Integrative Marine Ecology, Stazione Zoologica "Anton Dohrn", Fano Marine Centre, Viale Adriatico 1-N, 61032, Fano, Italy.
| | - Clementina Sansone
- Department of Marine Biotechnology, Stazione Zoologica "Anton Dohrn", Villa Comunale, 80121, Naples, Italy.
| | - Christophe Brunet
- Department of Marine Biotechnology, Stazione Zoologica "Anton Dohrn", Villa Comunale, 80121, Naples, Italy.
| | - Adrianna Ianora
- Department of Marine Biotechnology, Stazione Zoologica "Anton Dohrn", Villa Comunale, 80121, Naples, Italy.
| | - Donatella de Pascale
- Department of Marine Biotechnology, Stazione Zoologica "Anton Dohrn", Villa Comunale, 80121, Naples, Italy.
| | - Peter N Golyshin
- Centre for Environmental Biotechnology, School of Natural Sciences, Bangor University, Gwynedd LL57 2UW, UK.
| | - Antonio Dell'Anno
- Department of Life and Environmental Sciences, Università Politecnica Delle Marche, Via Brecce Bianche, 60131, Ancona, Italy.
| | - Eugenio Rastelli
- Department of Marine Biotechnology, Stazione Zoologica "Anton Dohrn", Fano Marine Centre, Viale Adriatico 1-N, 61032, Fano, Italy.
| |
Collapse
|
3
|
Vaid N, Sudan J, Dave S, Mangla H, Pathak H. Insight Into Microbes and Plants Ability for Bioremediation of Heavy Metals. Curr Microbiol 2022; 79:141. [PMID: 35320423 DOI: 10.1007/s00284-022-02829-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 03/04/2022] [Indexed: 01/07/2023]
Abstract
Contamination of ground and surface water, soil, and air by harmful and carcinogenic chemicals is one of the most prevalent problems in the modern industrialized world. Heavy metal toxicity has demonstrated to be paramount hazardous and there are various risks associated with it. In addition, these heavy metals have adverse effects on human health and plant physiology. The field of bioremediation has undergone an impactful revolution in recent years due to an exponential increase in various issues related to soil and water pollution. Bioremediation is an advanced and efficient technology, which involves the use of biological means such as microorganisms and plants to degrade heavy metal contaminants. Among the millions of microbes present in the ecosystem, the highest metal adsorption ability is possessed by species belonging to genus Penicillium, Streptomyces, Bacillus, Rhizopus, Chlorella, Ascophyllum, Sargassum, and Aspergillus. Among different plant species, Allium, Eucalyptus, Helianthus, and Hibiscus are the main heavy metal absorbers. The present review concentrates on the research in the bioremediation of important heavy metals through the use of plants and microbes.
Collapse
Affiliation(s)
- Nishtha Vaid
- Department of Plant Biotechnology, JECRC University, Jaipur, Rajasthan, India
| | - Jebi Sudan
- Department of Plant Biotechnology, JECRC University, Jaipur, Rajasthan, India
| | - Saurabh Dave
- Department of Chemistry, JECRC University, Jaipur, Rajasthan, India
| | - Himanshi Mangla
- Department of Plant Biotechnology, JECRC University, Jaipur, Rajasthan, India
| | - Hardik Pathak
- Department of Plant Biotechnology, JECRC University, Jaipur, Rajasthan, India.
| |
Collapse
|
4
|
Díaz A, Marrero J, Cabrera G, Coto O, Gómez JM. Optimization of nickel and cobalt biosorption by native Serratia marcescens strains isolated from serpentine deposits using response surface methodology. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 194:167. [PMID: 35142917 PMCID: PMC8831376 DOI: 10.1007/s10661-022-09816-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 01/22/2022] [Indexed: 05/28/2023]
Abstract
The treatment of metal-polluted wastes is a challenging issue of environmental concern. Metals can be removed using microbial biomass, and this is an interesting approach towards the design of eco-friendly technologies for liquid waste treatment. The study reported here aimed to optimize nickel and cobalt biosorption from aqueous solutions using three native metal-resistant Serratia marcescens strains. Ni(II) and Co(II) biosorption by S. marcescens strains was found to fit better to Langmuir's model, with maximum uptake capacities of 13.5 mg g-1 for Ni(II) ions and 19.9 mg g-1 for Co(II) ions. Different experimental conditions of initial metal concentration, pH, initial biomass, and temperature were optimized using the Plackett-Burman method, and, finally, biomass and metal concentration were studied using the response surface methodology (RSM) to improve biosorption. The optimum uptake capacities for Co(II) ions by the three biosorbents used were obtained for initial metal concentrations of 35-40 mg L-1 and an initial biomass of 6 mg. For Ni(II) ions, the optimum uptake capacity was achieved with 1 mg of initial biomass for S. marcescens C-1 and C-19, and with 7 mg for S. marcescens C-16, with initial concentrations of 20-50 mg L-1. The results obtained demonstrate the viability of native S. marcescens strains as biosorbents for Ni(II) and Co(II) removal. This study also contributes to our understanding of the potential uses of serpentine microbial populations for the design of environmental cleanup technologies.
Collapse
Affiliation(s)
- A Díaz
- Metal Biotechnology Laboratory, Faculty of Biology, University of Havana (Cuba), Calle 25 #455 Vedado, 10400, La Habana, Cuba
| | - J Marrero
- Metal Biotechnology Laboratory, Faculty of Biology, University of Havana (Cuba), Calle 25 #455 Vedado, 10400, La Habana, Cuba
| | - G Cabrera
- Biological and Enzymatic Reactors Group, Department of Chemical Engineering and Food Technology, Faculty of Sciences, 11510, Puerto Real, Cadiz, Spain
| | - O Coto
- Metal Biotechnology Laboratory, Faculty of Biology, University of Havana (Cuba), Calle 25 #455 Vedado, 10400, La Habana, Cuba
| | - J M Gómez
- Biological and Enzymatic Reactors Group, Department of Chemical Engineering and Food Technology, Faculty of Sciences, 11510, Puerto Real, Cadiz, Spain.
| |
Collapse
|
5
|
Priyadarshanee M, Chatterjee S, Rath S, Dash HR, Das S. Cellular and genetic mechanism of bacterial mercury resistance and their role in biogeochemistry and bioremediation. JOURNAL OF HAZARDOUS MATERIALS 2022; 423:126985. [PMID: 34464861 DOI: 10.1016/j.jhazmat.2021.126985] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 08/17/2021] [Accepted: 08/19/2021] [Indexed: 06/13/2023]
Abstract
Mercury (Hg) is a highly toxic element that occurs at low concentrations in nature. However, various anthropogenic and natural sources contribute around 5000 to 8000 metric tons of Hg per year, rapidly deteriorating the environmental conditions. Mercury-resistant bacteria that possess the mer operon system have the potential for Hg bioremediation through volatilization from the contaminated milieus. Thus, bacterial mer operon plays a crucial role in Hg biogeochemistry and bioremediation by converting both reactive inorganic and organic forms of Hg to relatively inert, volatile, and monoatomic forms. Both the broad-spectrum and narrow-spectrum bacteria harbor many genes of mer operon with their unique definitive functions. The presence of mer genes or proteins can regulate the fate of Hg in the biogeochemical cycle in the environment. The efficiency of Hg transformation depends upon the nature and diversity of mer genes present in mercury-resistant bacteria. Additionally, the bacterial cellular mechanism of Hg resistance involves reduced Hg uptake, extracellular sequestration, and bioaccumulation. The presence of unique physiological properties in a specific group of mercury-resistant bacteria enhances their bioremediation capabilities. Many advanced biotechnological tools also can improve the bioremediation efficiency of mercury-resistant bacteria to achieve Hg bioremediation.
Collapse
Affiliation(s)
- Monika Priyadarshanee
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology Rourkela, Rourkela 769 008, Odisha, India
| | - Shreosi Chatterjee
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology Rourkela, Rourkela 769 008, Odisha, India
| | - Sonalin Rath
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology Rourkela, Rourkela 769 008, Odisha, India
| | - Hirak R Dash
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology Rourkela, Rourkela 769 008, Odisha, India
| | - Surajit Das
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology Rourkela, Rourkela 769 008, Odisha, India.
| |
Collapse
|
6
|
Díaz A, Marrero J, Cabrera G, Coto O, Gómez JM. Biosorption of nickel, cobalt, zinc and copper ions by Serratia marcescens strain 16 in mono and multimetallic systems. Biodegradation 2022; 33:33-43. [PMID: 34657229 PMCID: PMC8803796 DOI: 10.1007/s10532-021-09964-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 10/05/2021] [Indexed: 12/18/2022]
Abstract
The metallurgical industry is one of the main sources of heavy metal pollution, which represents a severe threat to life. Metals can be removed from aqueous solutions by using microbial biomasses. This paper analyses the heavy metal biosorption capacity of Serratia marcescens strain 16 in single and multimetallic systems. The results obtained show that Co(II), Ni(II) and Zn(II) biosorption in monometallic systems is two to three times higher than in the presence of bi-metallic and multimetallic solutions. Fourier transform infrared spectroscopy confirmed that carbonyl, carboxyl and hydroxyl were the main functional groups, as well as the amide bands I and II involved in metal uptake, which are present in external structures of the bacterial cell. The results obtained demonstrated the viability of S. marcescens strain 16 as a biosorbent for the design of eco-friendly technologies for the treatment of waste liquor.
Collapse
Affiliation(s)
- A Díaz
- Metal Biotechnology Laboratory, Faculty of Biology, University of Havana (Cuba), 25th Street #455 Vedado, 10400, La Habana, Cuba
| | - J Marrero
- Metal Biotechnology Laboratory, Faculty of Biology, University of Havana (Cuba), 25th Street #455 Vedado, 10400, La Habana, Cuba
| | - G Cabrera
- Biological and Enzymatic Reactors Group, Department of Chemical Engineering and Food Technology, Faculty of Sciences, Puerto Real, 11510, Cádiz, Spain
| | - O Coto
- Metal Biotechnology Laboratory, Faculty of Biology, University of Havana (Cuba), 25th Street #455 Vedado, 10400, La Habana, Cuba
| | - J M Gómez
- Biological and Enzymatic Reactors Group, Department of Chemical Engineering and Food Technology, Faculty of Sciences, Puerto Real, 11510, Cádiz, Spain.
| |
Collapse
|
7
|
Wang J, Zhao S, Ling Z, Zhou T, Liu P, Li X. Enhanced removal of trivalent chromium from leather wastewater using engineered bacteria immobilized on magnetic pellets. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 775:145647. [PMID: 33631574 DOI: 10.1016/j.scitotenv.2021.145647] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 01/29/2021] [Accepted: 01/31/2021] [Indexed: 06/12/2023]
Abstract
Leather wastewater contains various toxic contaminants, with trivalent chromium (Cr(III)) having high concentration and adversely affecting wastewater treatment. In this study, a Cr(III) adsorption protein (MerP) was displayed on the cell surface of Escherichia coli and then coupled with a magnetic pellet system to facilitate Cr(III) adsorption. The results showed the engineered strain M-BL21 achieved an in vitro Cr(III) adsorption capacity of 2.38 mmol/g. Next, the magnetic pellets were prepared as component ratios of sodium alginate (2.5%), polyvinyl alcohol (8%), Fe3O4 nanoparticles (3.5%), and M-BL21 at 3 g/L. The optimized system was capable of Cr(III) adsorption at an efficiency of 91.29%, which was substantially higher than that of the magnetic carrier alone (67%). Results of scanning electron microscopy with energy-dispersive X-ray analysis proved that Cr(III) was absorbed on the magnetic pellet. The recyclable performance of magnetic property (13.34185 emu/g) and high Cr(III) adsorption efficiency (68.75%) remained after five cycles of Cr(III) absorption. In the medium-scale experiment, 25 L of leather wastewater were treated with magnetic pellet and the Cr(III) removal efficiency reached 88.2%. Thus, our results present an advanced, fully operational, and eco-friendly method for in situ removal of Cr(III) from contaminated wastewater.
Collapse
Affiliation(s)
- Jicun Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshui South Road #222, Lanzhou, Gansu 730000, People's Republic of China
| | - Shuai Zhao
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshui South Road #222, Lanzhou, Gansu 730000, People's Republic of China
| | - Zhenming Ling
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshui South Road #222, Lanzhou, Gansu 730000, People's Republic of China
| | - Tuoyu Zhou
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshui South Road #222, Lanzhou, Gansu 730000, People's Republic of China
| | - Pu Liu
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshui South Road #222, Lanzhou, Gansu 730000, People's Republic of China; Key Laboratory for Resources Utilization Technology of Unconventional Water of Gansu Province, Gansu Academy of Membrane Science and Technology, Lanzhou 730020, Gansu, People's Republic of China
| | - Xiangkai Li
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshui South Road #222, Lanzhou, Gansu 730000, People's Republic of China; Key Laboratory for Resources Utilization Technology of Unconventional Water of Gansu Province, Gansu Academy of Membrane Science and Technology, Lanzhou 730020, Gansu, People's Republic of China.
| |
Collapse
|
8
|
Hoseini AAS, Kaboosi H, Ahmady-Asbchin S, Ghorbanalinezhad E, Peyravii Ghadikolaii F. Binary Biosorption of Cadmium(II) and Nickel(II) onto Planococcus sp. Isolated from Wastewater: Kinetics, Equilibrium and Thermodynamic Studies. Ind Biotechnol (New Rochelle N Y) 2020. [DOI: 10.1089/ind.2020.0021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - Hami Kaboosi
- Department of Microbiology, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran
| | - Salman Ahmady-Asbchin
- Department of Microbiology, Faculty of Basic Science, University of Mazandaran, Babolsar, Iran
| | - Esmayel Ghorbanalinezhad
- Department of Microbiology, School of Biology Sciences, Islamic Azad University, Tonekabon branch, Tonekabon, Iran
| | | |
Collapse
|
9
|
Zhang J, Zeng Y, Liu B, Deng X. MerP/MerT-mediated mechanism: A different approach to mercury resistance and bioaccumulation by marine bacteria. JOURNAL OF HAZARDOUS MATERIALS 2020; 388:122062. [PMID: 31955028 DOI: 10.1016/j.jhazmat.2020.122062] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 01/08/2020] [Accepted: 01/08/2020] [Indexed: 06/10/2023]
Abstract
Currently, mechanism underlying mercury resistance and bioaccumulation of marine bacteria remains little understood. A marine bacterium Pseudomonas pseudoalcaligenes S1 is resistant to 120 mg/L Hg2+ with bioaccumulation capacity of 133.33 mg/g. Accordingly, Hg2+ resistance and bioaccumulation mechanism of S1 was investigated at molecular and cellular level. Annotation of S1 transcriptome reveals 772 differentially expressed genes, including Hg2+-relevant genes merT, merP and merA. Both merT and merP gene have three complete copies in S1 genome, while merA gene has only one. In order to evaluate the function of these Hg2+-relevant genes, three recombinant strains were constructed to express MerA (named as A), MerT/MerP (TP) and MerT/MerP/MerA (TPA), respectively. The results show that Hg2+ resistance of strain TP, TPA, and A are improved with minimum inhibition concentration (MIC) being 60 mg/L, 40 mg/L, and 20 mg/L, respectively compared to 2 mg/L of host strain. Strain TP and TPA exhibit enhanced Hg2+ bioaccumulation capacity, while strain A does not differ from the control. Their equilibrium Hg2+ bioaccumulation capacities are 110.48 mg/g, 94.49 mg/g, 83.76 mg/g and 82.29 mg/g, respectively. Summarily, different from most microorganisms that exhibit Hg2+ resistance by MerA-mediated mechanism, marine bacterium S1 achieves Hg2+ resistance and bioaccumulation capability via MerT/MerP-mediated strategy.
Collapse
Affiliation(s)
- Jinlong Zhang
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China
| | - Yiting Zeng
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China
| | - Bing Liu
- School of Traffic and Environment, Shenzhen Institute of Information Technology, Shenzhen 518172, China
| | - Xu Deng
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China.
| |
Collapse
|
10
|
Aryal M. A comprehensive study on the bacterial biosorption of heavy metals: materials, performances, mechanisms, and mathematical modellings. REV CHEM ENG 2020. [DOI: 10.1515/revce-2019-0016] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Discharges of waste containing heavy metals (HMs) have been a challenging problem for years because of their adverse effects in the environment. This article provides a comprehensive review of recent findings on bacterial biosorption and their performances for sequestration of HMs. It highlights the significance of HM removal and presents a brief overview on bacterial functionality and biosorption technology. It also discusses the achievements towards utilisation of bacterial biomass with biosorption of HMs from aqueous solutions. This article includes different types of kinetic, equilibrium, and thermodynamic models used for HM treatments using different bacterial species, as well as biosorption mechanisms along with desorption of metal ions and regeneration of bacterial biosorbents. Its fast kinetics of metal biosorption and desorption, low operational cost, and no production of toxic by-products provide attraction to many researchers. Bacteria can easily be produced using inexpensive growth media or obtained as a by-product from industries. A systematic comparison of the literature for a metal-binding capacity of bacterial biomass under different conditions is provided here. The properties of the cell wall constituents such as peptidoglycan and the role of functional groups for metal sorption are presented on the basis of their biosorption potential. Many bacterial biosorbents as reported in scientific literature have a high biosorption capacity, where some are better than commercial adsorbents. Based on the reported results, it seems that most bacteria have the potential for industrial applications for detoxification of HMs.
Collapse
Affiliation(s)
- Mahendra Aryal
- Department of Chemistry, Tri-Chandra Multiple Campus , Tribhuvan University , Kathmandu 00977 , Nepal
| |
Collapse
|
11
|
Kapahi M, Sachdeva S. Bioremediation Options for Heavy Metal Pollution. J Health Pollut 2019; 9:191203. [PMID: 31893164 PMCID: PMC6905138 DOI: 10.5696/2156-9614-9.24.191203] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Accepted: 08/20/2019] [Indexed: 05/02/2023]
Abstract
BACKGROUND Rapid industrialization and anthropogenic activities such as the unmanaged use of agro-chemicals, fossil fuel burning and dumping of sewage sludge have caused soils and waterways to be severely contaminated with heavy metals. Heavy metals are non-biodegradable and persist in the environment. Hence, remediation is required to avoid heavy metal leaching or mobilization into environmental segments and to facilitate their extraction. OBJECTIVES The present work briefly outlines the environmental occurrence of heavy metals and strategies for using microorganisms for bioremediation processes as reported in the scientific literature. METHODS Databases were searched from different libraries, including Google Scholar, Medline and Scopus. Observations across studies were then compared with the standards for discharge of environmental pollutants. DISCUSSION Bioremediation employs microorganisms for removing heavy metals. Microorganisms have adopted different mechanisms for bioremediation. These mechanisms are unique in their specific requirements, advantages, and disadvantages, the success of which depends chiefly upon the kind of organisms and the contaminants involved in the process. CONCLUSIONS Heavy metal pollution creates environmental stress for human beings, plants, animals and other organisms. A complete understanding of the process and various alternatives for remediation at different steps is needed to ensure effective and economic processes. COMPETING INTERESTS The authors declare no competing financial interests.
Collapse
Affiliation(s)
- Meena Kapahi
- Department of Biotechnology, Manav Rachna International Institute of Research and Studies, Faridabad, India
- Department of Chemistry, Manav Rachna University, Faridabad, India
| | - Sarita Sachdeva
- Department of Biotechnology, Manav Rachna International Institute of Research and Studies, Faridabad, India
| |
Collapse
|
12
|
Cai X, Zheng X, Zhang D, Iqbal W, Liu C, Yang B, Zhao X, Lu X, Mao Y. Microbial characterization of heavy metal resistant bacterial strains isolated from an electroplating wastewater treatment plant. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 181:472-480. [PMID: 31228823 DOI: 10.1016/j.ecoenv.2019.06.036] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 06/09/2019] [Accepted: 06/12/2019] [Indexed: 06/09/2023]
Abstract
Heavy metal pollution is one of the most widespread and complex environmental issues globally, posing a great threat to the ecosystem as well as human health. Bioremediation through heavy metal-resistant bacteria (HMRB) is currently the most promising technology to address this issue. To obtain HMRB to remediate heavy metal pollution potentially, 15 culturable HMRB strains were isolated from the sludge samples of an electroplating wastewater treatment plant (EWWTP), which belonged to the Bacillus, Shewanella, Lysinibacillus, and Acinetobacter genera. Their maximum tolerance concentrations to Cu2+, Ni2+, Mn2+, Co2+, and Cr2O72- were 40 mM, 10 mM, 200 mM, 40 mM, and 10 mM, respectively, and strain Mn1-4 showed much higher Mn2+ tolerance and removal effectiveness (3.355 g/L) than previously published reports. Moreover, multiple heavy metal-resistant genotypes and phenotypes were identified among these strains, of which strain Co1-1 carried the most of resistant gene sequences (10) and exhibited resistance to 7 categories of heavy metals, and the co-occurrence of heavy metal and antibiotic resistance were clearly observed in strain Ni1-3. In addition, flanked insert sequence (IS) elements on the heavy metal resistant genes (HMRGs) suggested that horizontal gene transfer (HGT) events may have resulted in multiple heavy metal resistance phenotypes and genotypes in these strains, and IS982 family transposase was presumed to result in the high Ni2+ tolerance in strain Ni1-3. This study expands our understanding of bacterial heavy metal resistance and provides promising candidates for heavy metal bioremediation.
Collapse
Affiliation(s)
- Xunchao Cai
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, China
| | - Xin Zheng
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, China
| | - Dunnan Zhang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, China
| | - Waheed Iqbal
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, China
| | - Changkun Liu
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, China
| | - Bo Yang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, China
| | - Xu Zhao
- Key Laboratory of Drinking Water Science and Technology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Xiaoying Lu
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, China; Faculty of Science and Technology, Technological and Higher Education Institute of Hong Kong, Tsing Yi, N.T, Hong Kong, China
| | - Yanping Mao
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, China.
| |
Collapse
|
13
|
Safari M, Ahmady-Asbchin S. Biosorption of zinc from aqueous solution by cyanobacterium Fischerella ambigua ISC67: optimization, kinetic, isotherm and thermodynamic studies. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2018; 78:1525-1534. [PMID: 30427793 DOI: 10.2166/wst.2018.437] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this present study, biosorption of Zn(II) from aqueous solution by cyanobacterium Fischerella ambigua was investigated in batch experiments. The effects of pH, bacterial dosage, initial Zn(II) concentration, contact time and temperature were studied. Removal process was influenced significantly by the variation of pH, biosorbent concentration, initial Zn(II) ion concentration, temperature and contact time. Optimum biosorption conditions were found to be initial pH of 5, bacterial dosage of 0.2 g/l and initial Zn(II) ion concentration of 175 mg/l at room temperature and contact time of 90 min. The maximum uptake capacity of F. ambigua for Zn(II) ions was found to be 98.03 mg/g at optimum conditions. The correlation coefficient for the second-order kinetic model was 0.995. The Freundlich isotherm model showed better fit to the equilibrium of the system, compared with the Langmuir model. Fourier transform infrared analysis of bacterial biomass revealed the presence of carboxyl, hydroxyl, sulfite and amino groups, which are likely responsible for the biosorption of Zn(II). The negative values of Gibbs free energy, ΔG°, confirm the spontaneous nature of the biosorption process. Finally, F. ambigua adsorption capacity was compared with other biosorbents. Results showed that F. ambigua was an efficient biosorbent in the removal of Zn(II) ions from an aqueous solution.
Collapse
Affiliation(s)
- Moein Safari
- Faculty of Basic Science, Department of Biology, Ilam University, Ilam, Iran E-mail:
| | - Salman Ahmady-Asbchin
- Faculty of Basic Science, Department of Molecular and Cell Biology, University of Mazandaran, Babolsar, Iran
| |
Collapse
|
14
|
Hassan SHA, Koutb M, Nafady NA, Hassan EA. Potentiality of Neopestalotiopsis clavispora ASU1 in biosorption of cadmium and zinc. CHEMOSPHERE 2018; 202:750-756. [PMID: 29605794 DOI: 10.1016/j.chemosphere.2018.03.114] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 03/16/2018] [Accepted: 03/17/2018] [Indexed: 06/08/2023]
Abstract
In this study, a fungal isolate was isolated from avocado fruit collected from a market in Makkah city, Saudi Arabia, and identified as Neopestalotiopsis clavispora ASU1. The biomass of Neopestalotiopsis clavispora ASU1 was used as a natural bio-sorbent for removal of Cd(II) and Zn(II) from aqueous solutions. Characterization of fungal biomass was performed using Fourier transform infrared spectroscopy, X-ray Diffractometer, and BET surface area. Different factors on Cd(II) and Zn(II) biosorption were studied to evaluate the maximum conditions for metals biosorption. The (qmax) for Cd(II) and Zn (II) by N. clavispora ASU1 calculated from the Langmuir adsorption isotherm was 185.3 ± 0.25 and 153.8 ± 0.21 mg/g, respectively. Based on r2, the equilibrium biosorption isotherms fitted well with Langmuir model than Freundlich isotherm. The adsorption kinetics was studied, and the biosorption followed to the pseudo-second-order model. Thus, the current study indicated that the biomass of N. clavispora ASU1 is an effective adsorbent for the removal of heavy metals from aqueous solutions.
Collapse
Affiliation(s)
- Sedky H A Hassan
- Botany & Microbiology Department, Faculty of Science, Assiut University, New Valley Branch, 72511, El-Kharga, Egypt.
| | - Mostafa Koutb
- Botany & Microbiology Department, Faculty of Science, Assiut University, 71516, Assiut, Egypt; Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Nivien Allam Nafady
- Botany & Microbiology Department, Faculty of Science, Assiut University, 71516, Assiut, Egypt
| | - Elhagag Ahmed Hassan
- Botany & Microbiology Department, Faculty of Science, Assiut University, 71516, Assiut, Egypt
| |
Collapse
|
15
|
Kosek K, Kozak K, Kozioł K, Jankowska K, Chmiel S, Polkowska Ż. The interaction between bacterial abundance and selected pollutants concentration levels in an arctic catchment (southwest Spitsbergen, Svalbard). THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 622-623:913-923. [PMID: 29227942 DOI: 10.1016/j.scitotenv.2017.11.342] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 11/28/2017] [Accepted: 11/29/2017] [Indexed: 06/07/2023]
Abstract
Persistent organic pollutants (POPs) have been a topic of interest in environmental sciences for >60years. POPs in the Arctic have been investigated since the 1970s, when first atmospheric measurements revealed the presence of these pollutants in the polar regions. Major contaminant transport routes to the Arctic include atmospheric and oceanic transport, as well as inflow from rivers and sea ice. The sources of pollutants, such as industry, power generators, vehicle and ship exhausts, introduce the PAHs, phenols, formaldehyde or metals into the Arctic. Transport via sea currents, however, can take several years. The highest concentration levels of total PAHs were observed in two samples from the tributaries in July 2015 and were 1069ngL-1 and 3141ngL-1 and in September 2015, the highest concentrations were observed in samples collected from Revvatnet lake and were 978ngL-1 and 1823ngL-1. The highest concentrations of trace elements in both months were 41μgL-1 in the sample from the highest tributary (July 2015) and 79μgL-1 in the same sample (September 2015). The purpose of this study was also to determine abundance of bacteria in the Arctic freshwater of different types. Microbes are omnipresent and represent diverse biological communities. In the freshwater ecosystems, microorganisms form the base of the food chain supporting higher trophic levels. Although microbes are generally thought to live in the warm regions of Earth, many of them develop in cold climates. In the Revelva catchment, the biggest number of bacteria were detected at the river estuary in July 2015 and at the sampling point located in the Revvatnet lake in September 2015. Generally, the bacterial abundance indices depended on nutrient levels to a small extent, showing the environment of the Revelva catchment not to be nutrient limited, which is in accordance with its rich biological life also in macroscale.
Collapse
Affiliation(s)
- Klaudia Kosek
- Department of Analytical Chemistry, Faculty of Chemistry, Gdansk University of Technology, 11/12 Narutowicza St., Gdansk 80-233, Poland.
| | - Katarzyna Kozak
- Department of Analytical Chemistry, Faculty of Chemistry, Gdansk University of Technology, 11/12 Narutowicza St., Gdansk 80-233, Poland
| | - Krystyna Kozioł
- Institute of Geophysics, Polish Academy of Sciences, ul. KsięciaJanusza 64, 01-452 Warsaw, Poland
| | - Katarzyna Jankowska
- Department of Water and Waste-Water Technology, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, 11/12 Narutowicza St., Gdansk 80-233, Poland
| | - Stanisław Chmiel
- Faculty of Earth Sciences and Spatial Management, Maria Curie-Skłodowska University, 2 C-D Kraśnicka Ave., Lublin 20-718, Poland
| | - Żaneta Polkowska
- Department of Analytical Chemistry, Faculty of Chemistry, Gdansk University of Technology, 11/12 Narutowicza St., Gdansk 80-233, Poland.
| |
Collapse
|
16
|
Ranawat P, Rawat S. Metal-tolerant thermophiles: metals as electron donors and acceptors, toxicity, tolerance and industrial applications. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:4105-4133. [PMID: 29238927 DOI: 10.1007/s11356-017-0869-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 11/28/2017] [Indexed: 06/07/2023]
Abstract
Metal-tolerant thermophiles are inhabitants of a wide range of extreme habitats like solfatara fields, hot springs, mud holes, hydrothermal vents oozing out from metal-rich ores, hypersaline pools and soil crusts enriched with metals and other elements. The ability to withstand adverse environmental conditions, like high temperature, high metal concentration and sometimes high pH in their niche, makes them an interesting subject for understanding mechanisms behind their ability to deal with multiple duress simultaneously. Metals are essential for biological systems, as they participate in biochemistries that cannot be achieved only by organic molecules. However, the excess concentration of metals can disrupt natural biogeochemical processes and can impose toxicity. Thermophiles counteract metal toxicity via their unique cell wall, metabolic factors and enzymes that carry out metal-based redox transformations, metal sequestration by metallothioneins and metallochaperones as well as metal efflux. Thermophilic metal resistance is heterogeneous at both genetic and physiology levels and may be chromosomally, plasmid or transposon encoded with one or more genes being involved. These effective response mechanisms either individually or synergistically make proliferation of thermophiles in metal-rich habitats possibly. This article presents the state of the art and future perspectives of responses of thermophiles to metals at genetic as well as physiological levels.
Collapse
Affiliation(s)
- Preeti Ranawat
- Department of Botany and Microbiology, Hemvati Nandan Bahuguna Garhwal University, Srinagar (Garhwal), Uttarakhand, India
| | - Seema Rawat
- School of Life Sciences, Central University of Gujarat, Gandhinagar, Gujarat, India.
| |
Collapse
|
17
|
Hsueh YH, Lin KS, Wang YT, Chiang CL. Copper, nickel, and zinc cations biosorption properties of Gram-positive and Gram-negative MerP mercury-resistance proteins. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.06.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
18
|
Artificial neural network (ANN) approach for modeling Zn(II) adsorption in batch process. KOREAN J CHEM ENG 2017. [DOI: 10.1007/s11814-017-0157-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
19
|
Gürel L. Applications of the Biosorption Process for Nickel Removal from Aqueous Solutions – A Review. CHEM ENG COMMUN 2017. [DOI: 10.1080/00986445.2017.1306698] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Levent Gürel
- Environmental Engineering Department, Faculty of Engineering, Pamukkale University, Denizli, Turkey
| |
Collapse
|
20
|
Mohapatra RK, Parhi PK, Patra JK, Panda CR, Thatoi HN. Biodetoxification of Toxic Heavy Metals by Marine Metal Resistant Bacteria- A Novel Approach for Bioremediation of the Polluted Saline Environment. Microb Biotechnol 2017. [DOI: 10.1007/978-981-10-6847-8_15] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
21
|
Matyja K, Małachowska-Jutsz A, Mazur AK, Grabas K. Assessment of toxicity using dehydrogenases activity and mathematical modeling. ECOTOXICOLOGY (LONDON, ENGLAND) 2016; 25:924-939. [PMID: 27021434 DOI: 10.1007/s10646-016-1650-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/14/2016] [Indexed: 06/05/2023]
Abstract
Dehydrogenase activity is frequently used to assess the general condition of microorganisms in soil and activated sludge. Many studies have investigated the inhibition of dehydrogenase activity by various compounds, including heavy metal ions. However, the time after which the measurements are carried out is often chosen arbitrarily. Thus, it can be difficult to estimate how the toxic effects of compounds vary during the reaction and when the maximum of the effect would be reached. Hence, the aim of this study was to create simple and useful mathematical model describing changes in dehydrogenase activity during exposure to substances that inactivate enzymes. Our model is based on the Lagergrens pseudo-first-order equation, the rate of chemical reactions, enzyme activity, and inactivation and was created to describe short-term changes in dehydrogenase activity. The main assumption of our model is that toxic substances cause irreversible inactivation of enzyme units. The model is able to predict the maximum direct toxic effect (MDTE) and the time to reach this maximum (TMDTE). In order to validate our model, we present two examples: inactivation of dehydrogenase in microorganisms in soil and activated sludge. The model was applied successfully for cadmium and copper ions. Our results indicate that the predicted MDTE and TMDTE are more appropriate than EC50 and IC50 for toxicity assessments, except for long exposure times.
Collapse
Affiliation(s)
- Konrad Matyja
- Environmental Engineering Faculty, Department of Ecologistics and Environmental Risk Management, Wrocław University of Technology, Wroclaw, Poland.
| | - Anna Małachowska-Jutsz
- Environmental Biotechnology Department, Silesian University of Technology, Gliwice, Poland
| | - Anna K Mazur
- Faculty of Chemistry, Department of Advanced Material Technologies, Wrocław University of Technology, Wrocław, Poland
| | - Kazimierz Grabas
- Environmental Engineering Faculty, Department of Ecologistics and Environmental Risk Management, Wrocław University of Technology, Wroclaw, Poland
| |
Collapse
|
22
|
Aryal M, Liakopoulou-Kyriakides M. Bioremoval of heavy metals by bacterial biomass. ENVIRONMENTAL MONITORING AND ASSESSMENT 2015; 187:4173. [PMID: 25471624 DOI: 10.1007/s10661-014-4173-z] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 11/17/2014] [Indexed: 05/22/2023]
Abstract
Heavy metals are among the most common pollutants found in the environment. Health problems due to the heavy metal pollution become a major concern throughout the world, and therefore, various treatment technologies such as reverse osmosis, ion exchange, solvent extraction, chemical precipitation, and adsorption are adopted to reduce or eliminate their concentration in the environment. Biosorption is a cost-effective and environmental friendly technique, and it can be used for detoxification of heavy metals in industrial effluents as an alternative treatment technology. Biosorption characteristics of various bacterial species are reviewed here with respect to the results reported so far. The role of physical, chemical, and biological modification of bacterial cells for heavy metal removal is presented. The paper evaluates the different kinetic, equilibrium, and thermodynamic models used in bacterial sorption of heavy metals. Biomass characterization and sorption mechanisms as well as elution of metal ions and regeneration of biomass are also discussed.
Collapse
Affiliation(s)
- Mahendra Aryal
- Faculty of Chemical Engineering, Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | | |
Collapse
|
23
|
Vaiopoulou E, Gikas P. Effects of chromium on activated sludge and on the performance of wastewater treatment plants: A review. WATER RESEARCH 2012; 46:549-570. [PMID: 22154108 DOI: 10.1016/j.watres.2011.11.024] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2011] [Revised: 10/31/2011] [Accepted: 11/08/2011] [Indexed: 05/31/2023]
Abstract
Chromium is a heavy metal of commercial importance, thus significant amounts are released in wastewaters. Chromium in wastewaters and in the aquatic environment is primarily encountered in oxidation stages +3 (Cr((III))) and +6 (Cr((VI))). Recent publications suggest that Cr((VI)) compounds are more toxic than Cr((III)) ones, while Cr((III)) has been identified as trace element, at least for complex organisms. With respect to chromium species mobility, Cr((VI)) can cross cellular membranes, which then may be oxidized to Cr((III)) and react with intracellular biomolecules. Clear conclusions cannot be derived about the critical chromium concentrations that affect activated sludge growth, as the latter is a function of a number of factors. Broadly, may be supported that activated sludge growth is stimulated at Cr((III)) concentrations up to 15 mg L(-1), above which is inhibited, with lethal doses lying above 160 mg Cr((III)) L(-1). On the other hand, literature data on Cr((VI)) effects on activated sludge are even more controversial. A number of reports support that Cr((VI)) is toxic to activated sludge at concentrations above 5 mg L(-1), while others report growth stimulation at concentrations up to 25 mg L(-1). However, all reports agree that Cr((VI)) is definitely an activated sludge growth inhibitor at higher concentrations, while 80 mg Cr((VI)) L(-1) have been identified as lethal dose. A number of factors have been identified to influence chromium toxicity on activated sludge, such as, pH, biomass concentration, presence of organic substances or other heavy metals, acclimation process, exposure time, etc. Naturally, the presence of chromium species in wastewaters may affect the performance of wastewater treatment plants often causing malfunctions, particularly for industrial wastewaters containing relatively high chromium concentrations. The present work reviews in a critical way the published literature on chromium effects on activated sludge, and on the operation of wastewater treatment plants.
Collapse
Affiliation(s)
- Eleni Vaiopoulou
- Prefecture of Kavala, East Macedonia and Thrace Periphery, 65110 Kavala, Greece.
| | | |
Collapse
|
24
|
Wu Y, Li T, Yang L. Mechanisms of removing pollutants from aqueous solutions by microorganisms and their aggregates: a review. BIORESOURCE TECHNOLOGY 2012; 107:10-8. [PMID: 22257855 DOI: 10.1016/j.biortech.2011.12.088] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Revised: 12/16/2011] [Accepted: 12/18/2011] [Indexed: 05/18/2023]
Abstract
With the public's enhanced awareness of eco-safety, environmentally benign measures based on microorganisms and microbial aggregates have become more accepted as methods of removing pollutants from aquatic systems. In this review, the application of microorganisms and microbial aggregates for removing pollutants from aqueous solutions is introduced and described based on mechanisms such as assimilation, adsorption, and biodegradation. The advantages of and future studies regarding the use of microorganisms and microbial aggregates to remove pollutants are discussed. Due to the limitation of a single microorganism species in adapting to heterogeneous conditions, this review demonstrates that the application of microbial aggregates consisting of multiple photoautotrophic and heterotrophic microorganisms, is a promising method of removing multiple pollutants from complex wastewaters and warrants further research.
Collapse
Affiliation(s)
- Yonghong Wu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No. 71, East Beijing Road, Nanjing 210008, PR China.
| | | | | |
Collapse
|
25
|
Genetic expression of bacterial merC fused with plant SNARE in Saccharomyces cerevisiae increased mercury accumulation. Biochem Eng J 2011. [DOI: 10.1016/j.bej.2011.05.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
26
|
Suazo-Madrid A, Morales-Barrera L, Aranda-García E, Cristiani-Urbina E. Nickel(II) biosorption by Rhodotorula glutinis. J Ind Microbiol Biotechnol 2010; 38:51-64. [DOI: 10.1007/s10295-010-0828-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Accepted: 07/26/2010] [Indexed: 10/19/2022]
|
27
|
Kao WC, Wu JY, Chang CC, Chang JS. Cadmium biosorption by polyvinyl alcohol immobilized recombinant Escherichia coli. JOURNAL OF HAZARDOUS MATERIALS 2009; 169:651-658. [PMID: 19398152 DOI: 10.1016/j.jhazmat.2009.03.140] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2009] [Revised: 03/29/2009] [Accepted: 03/31/2009] [Indexed: 05/27/2023]
Abstract
Recombinant Escherichia coli expressing human metallothionein protein was immobilized with polyvinyl alcohol (PVA) for the removal of cadmium from solution. The adsorption ability was strongly affected by pH with optimal performance at pH 5.0, while it was less sensitive to temperature over the range of 20-42 degrees C. The adsorption kinetics and equilibrium of PVA-immobilized cells was best described by pseudo-second order model and Langmuir isotherm, respectively. Over the Cd concentrations range of 10-150 mg/l, PVA-cells had the highest Cd removal percentage (82.7%) at 10mg Cd/l and a biomass loading of 15.4 wt.%. Better adsorption ability was obtained when biomass loading was increased, as the highest adsorption capacity of 4.29 mg/g was achieved at 33.0 wt.% of biomass (initial Cd concentration=100mg/l). An aqueous solution of 0.01 M Na(3)NTA displayed the best desorption efficiency (57-89%) for four A/D cycles, while 51-61% of the original adsorption capacity was retained after regeneration.
Collapse
Affiliation(s)
- Wei-Chen Kao
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | | | | | | |
Collapse
|
28
|
Amini M, Younesi H, Bahramifar N. Biosorption of nickel(II) from aqueous solution by Aspergillus niger: response surface methodology and isotherm study. CHEMOSPHERE 2009; 75:1483-91. [PMID: 19285703 DOI: 10.1016/j.chemosphere.2009.02.025] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2008] [Revised: 02/09/2009] [Accepted: 02/09/2009] [Indexed: 05/17/2023]
Abstract
In the present study, the effects of biosorbent Aspergillus niger dosage, initial solution pH and initial Ni(II) concentration on the uptake of Ni(II) by NaOH pretreated biomass of A. niger from aqueous solution were investigated. Batch experiments were carried out in order to model and optimize the biosorption process. The influence of three parameters on the uptake of Ni(II) was described using a response surface methodology (RSM) as well as Langmuir and Freundlich isotherm models. Optimum Ni(II) uptake of 4.82 mg Ni(II)g(-1) biomass (70.30%) was achieved at pH 6.25, biomass dosage of 2.98 gL(-1) and initial Ni(II) concentration of 30.00 mgL(-1) Ni(II). Langmuir and Freundlich were able to describe the biosorption isotherm fairly well. However, prediction of Ni(II) biosorption using Langmuir and Freundlich isotherms was relatively poor in comparison with RSM approaches. The biosorption mechanism was also investigated by using Fourier transfer infrared (FT-IR) analysis of untreated, NaOH pretreated, and Ni(II) loaded A. niger biomass.
Collapse
Affiliation(s)
- Malihe Amini
- Department of Environmental Science, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, PO Box 64414-356, Iran
| | | | | |
Collapse
|