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Bioremediation

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https://www.readbyqxmd.com/read/28545863/the-impact-of-dissolved-inorganic-nitrogen-and-phosphorous-on-responses-of-microbial-plankton-to-the-texas-city-y-oil-spill-in-galveston-bay-texas-usa
#1
Alicia K Williams, Hernando P Bacosa, Antonietta Quigg
Ongoing bioremediation research seeks to promote naturally occurring microbial polycyclic aromatic hydrocarbon (PAH) degradation during and after oil spill events. However, complex relationships among functionally different microbial groups, nutrients and PAHs remain unconstrained. We conducted a surface water survey and corresponding nutrient amendment bioassays following the Texas City "Y" oil spill in Galveston Bay, Texas. Resident microbial groups, defined as either heterotrophic or autotrophic were enumerated by flow cytometry...
May 22, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28544990/degradation-of-mecoprop-in-polluted-landfill-leachate-and-waste-water-in-a-moving-bed-biofilm-reactor
#2
Mònica Escolà Casas, Tue Kjærgaard Nielsen, Witold Kot, Lars Hestbjerg Hansen, Anders Johansen, Kai Bester
Mecoprop is a common pollutant in effluent-, storm- and groundwater as well as in leachates from derelict dumpsites. Thus, bioremediation approaches may be considered. We conducted batch experiments with moving bed biofilm (MBBR)-carriers to understand the degradation of mecoprop. As a model, the carriers were incubated in effluent from a conventional wastewater treatment plant which was spiked to 10, 50 and 100 μg L(-1) mecoprop. Co-metabolic processes as well as mineralization were studied. Initial mecoprop concentration and mecoprop degradation impacted the microbial communities...
May 17, 2017: Water Research
https://www.readbyqxmd.com/read/28540556/the-use-of-bacterial-bioremediation-of-metals-in-aquatic-environments-in-the-twenty-first-century-a-systematic-review
#3
Feliphe Lacerda Souza de Alencar, Julio Alejandro Navoni, Viviane Souza do Amaral
Metal pollution is a current environmental issue as a consequence of unregulated anthropic activiy. A wide range of bioremediation strategies have been successfully implemented to recover contaminated areas. Among them, bacterial bioremediation stands out as a promising tool to confront these types of concerns. This study aimed to compare and discuss worldwide scientific evolution of bacterial potential for metal bioremediation in aquatic ecosystems. The study consisted of a systematic review, elaborated through a conceptual hypothesis model, during the period from 2000 to 2016, using PubMed, MEDLINE, and SciELO databases as data resources...
May 24, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28537018/syntrophic-association-and-performance-of-clostridium-desulfovibrio-aeromonas-and-tetrathiobacter-as-anodic-biocatalysts-for-bioelectricity-generation-in-dual-chamber-microbial-fuel-cell
#4
Smita S Kumar, Sandeep K Malyan, Suddhasatwa Basu, Narsi R Bishnoi
Anode chamber of a dual chamber microbial fuel cell (MFC) having raw landfill leachate was inoculated with consortium of sulphate-reducing bacteria (SRB) and sulphide-oxidizing bacteria (SOB) to study the phylogenetic architecture, function and mutualism of anolyte community developed in the reactor. Enriched microbial community was analysed with the help of Illumina MiSeq and indicated the dominance of Firmicutes (41.4%), Clostridia (36.4%) and Clostridium (12.9%) at phylum, class and genus level, respectively...
May 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28536287/kisameet-glacial-clay-an-unexpected-source-of-bacterial-diversity
#5
Sarah L Svensson, Shekooh Behroozian, Wanjing Xu, Michael G Surette, Loretta Li, Julian Davies
Widespread antibiotic resistance among bacterial pathogens is providing the impetus to explore novel sources of antimicrobial agents. Recently, the potent antibacterial activity of certain clay minerals has stimulated scientific interest in these materials. One such example is Kisameet glacial clay (KC), an antibacterial clay from a deposit on the central coast of British Columbia, Canada. However, our understanding of the active principles of these complex natural substances is incomplete. Like soils, clays may possess complex mixtures of bacterial taxa, including the Actinobacteria, a clade known to be rich in antibiotic-producing organisms...
May 23, 2017: MBio
https://www.readbyqxmd.com/read/28535595/enhancement-of-carbon-and-nitrogen-removal-by-helophytes-along-subsurface-water-flowpaths-receiving-treated-wastewater
#6
Miquel Ribot, Susana Bernal, Myrto Nikolakopoulou, Timothy N Vaessen, Joaquín Cochero, Esperança Gacia, Albert Sorolla, Alba Argerich, Francesc Sabater, Manel Isnard, Eugènia Martí
Wastewater treatment plant (WWTP) effluents are sources of dissolved organic carbon (DOC) and inorganic nitrogen (DIN) to receiving streams, which can eventually become saturated by excess of DIN. Aquatic plants (i.e., helophytes) can modify subsurface water flowpaths as well as assimilate nutrients and enhance microbial activity in the rhizosphere, yet their ability to increase DIN transformation and removal in WWTP-influenced streams is poorly understood. We examined the influence of helophytes on DIN removal along subsurface water flowpaths and how this was associated with DOC removal and labile C availability...
May 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28533069/enrichment-and-characterization-of-hydrocarbon-degrading-bacteria-from-petroleum-refinery-waste-as-potent-bioaugmentation-agent-for-in-situ-bioremediation
#7
Poulomi Sarkar, Ajoy Roy, Siddhartha Pal, Balaram Mohapatra, Sufia K Kazy, Mrinal K Maiti, Pinaki Sar
Intrinsic biodegradation potential of bacteria from petroleum refinery waste was investigated through isolation of cultivable strains and their characterization. Pseudomonas and Bacillus spp. populated the normal cultivable taxa while prolonged enrichment with hydrocarbons and crude oil yielded hydrocarbonoclastic bacteria of genera Burkholderia, Enterobacter, Kocuria, Pandoraea, etc. Strains isolated through enrichment showed assemblages of superior metabolic properties: utilization of aliphatic (C6-C22) and polyaromatic compounds, anaerobic growth with multiple terminal electron acceptors and higher biosurfactant production...
May 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28531662/microencapsulation-of-gulosibacter-molinativorax-on4-t-cells-by-a-spray-drying-process-using-different-biopolymers
#8
Berta N Estevinho, A Rita Lopes, Vera Sousa, Fernando Rocha, Olga C Nunes
Molinate is a thiocarbamate herbicide used in rice crop protection. As other pesticides, molinate is a recognized environmental pollutant and bio-accumulated by some wildlife forms. Gulosibacter molinativorax ON4(T) is able to hydrolyse molinate into metabolites which are further degraded by other un-related bacteria. Hence, it can be used in molinate bioremediation processes. The aim of this work was to investigate the possibility of producing G. molinativorax ON4(T) microparticles, using different non-toxic biopolymers (arabic gum, modified chitosan, calcium alginate and sodium alginate) as encapsulating agents by a spray-drying process...
May 11, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28530199/synthesis-of-ag-nps-impregnated-cellulose-composite-material-its-possible-role-in-wound-healing-and-photocatalysis
#9
Attarad Ali, Ihsan Ul Haq, Javeed Akhtar, Muhammad Sher, Naveed Ahmed, Muhammad Zia
Cellulose is the natural biopolymer normally used as supporting agent with enhanced applicability and properties. In present study, cellulose isolated from citrus waste is used for silver nanoparticles (Ag-NPs) impregnation by a simple and reproducible method. The Ag-NPs fabricated cellulose (Ag-Cel) was characterised by powder X-rays diffraction, Fortier transform infrared spectroscopy and scanning electron microscopy. The thermal stability was studied by thermo-gravimetric analysis. The antibacterial activity performed by disc diffusion assay reveals good zone of inhibition against Staphylococcus aureus and Escherichia coli by Ag-Cel as compared Ag-NPs...
June 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28527762/effects-of-rhamnolipids-on-microorganism-characteristics-and-applications-in-composting-a-review
#10
REVIEW
Binbin Shao, Zhifeng Liu, Hua Zhong, Guangming Zeng, Guansheng Liu, Mingda Yu, Yang Liu, Xin Yang, Zhigang Li, Zhendong Fang, Juntao Zhang, Chenghao Zhao
Biosurfactant rhmnolipids have been applied in many fields, especially in environmental bioremediation. According to previous researches, many research groups have studied the influence of rhamnolipids on microorganism characteristics and/or its application in composting. In this review, the effects of rhamnolipids on the cell surface properties of microorganisms was discussed firstly, such as cell surface hydrophobicity (CSH), electrical, surface compounds, etc. Moreover, the deeper mechanisms were also discussed, such as the effects of rhamnolipids on the structural characteristics and functional characteristics of the cell membrane, and the effects of rhamnolipids on the related enzymes and genes...
July 2017: Microbiological Research
https://www.readbyqxmd.com/read/28527408/subcellular-localization-based-comparative-study-on-radioresistant-bacteria-a-novel-approach-to-mine-proteins-involve-in-radioresistance
#11
Divya Vishambra, Malay Srivastava, Kamal Dev, Varun Jaiswal
Radioresistant bacteria (RRB) are among the most radioresistant organisms and has a unique role in evolution. Along with the evolutionary role, radioresistant organisms play important role in paper industries, bioremediation, vaccine development and possibility in anti-aging and anti-cancer treatment. The study of radiation resistance in RRB was mainly focused on cytosolic mechanisms such as DNA repair mechanism, cell cleansing activity and high antioxidant activity. Although it was known that protein localized on outer areas of cell play role in resistance towards extreme condition but the mechanisms/proteins localized on the outer area of cells are not studied for radioresistance...
May 10, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/28527375/surfactant-enhanced-remediation-of-polycyclic-aromatic-hydrocarbons-a-review
#12
REVIEW
Shanti Lamichhane, K C Bal Krishna, Ranjan Sarukkalige
Polycyclic aromatic hydrocarbons (PAHs) are toxic, mutagenic and carcinogenic organic compounds that are widely present in the environment. The bioremediation of PAHs is an economical and environmentally friendly remediation technique, but it is limited because PAHs have low water solubility and fewer bioavailable properties. The solubility and bioavailability of PAHs can be increased by using surfactants to reduce surface tension and interfacial tension; this method is called surfactant-enhanced remediation (SER)...
May 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28527323/revealing-the-ability-of-a-novel-polysaccharide-bioflocculant-in-bioremediation-of-heavy-metals-sensed-in-a-vibrio-bioluminescence-reporter-assay
#13
Arya Sajayan, G Seghal Kiran, S Priyadharshini, Navya Poulose, Joseph Selvin
A bioflocculant-producing bacterial strain, designated MSI021, was isolated from the marine sponge Dendrilla nigra and demonstrated 94% flocculation activity in a kaolin clay suspension. MSI021 was identified as Bacillus cereus based on phylogenetic affiliation and biochemical characteristics. The purified extra-cellular bioflocculant was chemically elucidated as a polysaccharide molecule. The polysaccharide bioflocculant was stable under both acidic and alkaline conditions (pH 2.0-10.0) and temperatures up to 100 °C...
May 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28526282/an-oleaginous-filamentous-microalgae-tribonema-minus-exhibits-high-removing-potential-of-industrial-phenol-contaminants
#14
Tianyou Cheng, Wei Zhang, Wenlei Zhang, Guanhua Yuan, Hui Wang, Tianzhong Liu
Discharge of industrial phenol contaminants could cause great harm on natural environment. Through oleaginous microalgae cultivation in phenolic wastewater, pollutants can be phototrophically biofixed into biomass as feedstock for bioenergy production. It was firstly reported in this study that, an oleaginous filamentous microalgae Tribonema minus exhibited strong environmental phenol removal ability. T. minus filaments showed 449.46mgg(-1) of phenol-uptake capacity, obviously higher than those strains with low phenol absorption such as Scenedesmus dimorphus...
May 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28521164/biotransformation-of-hexabromocyclododecanes-with-hexachlorocyclohexane-transforming-sphingobium-chinhatense-strain-ip26
#15
Norbert V Heeb, Andreas Grubelnik, Birgit Geueke, Hans-Peter E Kohler, Peter Lienemann
Bacterial evolution has resulted in the appearance of several Sphingomonadacea strains that gained the ability to metabolize hexachlorocyclohexanes (HCHs). HCHs have been widely used as pesticides but were banned under the Stockholm Convention on persistent organic pollutants (POPs) in 2009. Here we present evidence for bacterial transformation reactions of hexabromocyclododecanes (HBCDs), which are structurally related to HCHs. HBCDs were used as flame retardants. They are now also considered as POPs and their production and use is restricted since 2013...
May 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28516418/improvement-of-the-stabilization-and-activity-of-protocatechuate-3-4-dioxygenase-isolated-from-rhizobium-sp-lmb-1-and-immobilized-on-fe3o4-nanoparticles
#16
Li-Shuang Zhang, Yue Fang, Ying Zhou, Bang-Ce Ye
Protocatechuate 3,4-dioxygenase (P34O), which is isolated from Rhizobium sp. LMB-1, catalyzes the ring cleavage step in the metabolism of aromatic compounds, and has great potential for environmental bioremediation. However, its structure is very sensitive to different environmental factors, which weaken its activity. Immobilization of the enzyme can improve its stability, allow reusability, and reduce operation costs. In this work, the relative molecular mass of the native P34O enzyme was determined to be 500 kDa by gel filtration chromatography on Sephadex G-200, and the enzyme was immobilized onto (3-aminopropyl) triethoxysilane-modified Fe3O4 nanoparticles (NPs) by the glutaraldehyde method...
May 17, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28516205/applications-of-white-rot-fungi-in-bioremediation-with-nanoparticles-and-biosynthesis-of-metallic-nanoparticles
#17
REVIEW
Kai He, Guiqiu Chen, Guangming Zeng, Zhenzhen Huang, Zhi Guo, Tiantian Huang, Min Peng, Jiangbo Shi, Liang Hu
White rot fungi (WRF) are important environmental microorganisms that have been widely applied in many fields. To our knowledge, the application performance of WRF in bioremediation can be greatly improved by the combination with nanotechnology. And the preparation of metallic nanoparticles using WRF is an emerging biosynthesis approach. Understanding the interrelation of WRF and nanoparticles is important to further expand their applications. Thus, this mini-review summarizes the currently related reports mainly from the two different point of views...
May 17, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28515083/self-healing-capacity-of-deep-sea-ecosystems-affected-by-petroleum-hydrocarbons-understanding-microbial-oil-degradation-at-hydrocarbon-seeps-is-key-to-sustainable-bioremediation-protocols
#18
Alberto Scoma, Michail M Yakimov, Daniele Daffonchio, Nico Boon
No abstract text is available yet for this article.
May 17, 2017: EMBO Reports
https://www.readbyqxmd.com/read/28512321/restoration-of-the-growth-of-escherichia-coli-under-k-deficient-conditions-by-cs-incorporation-via-the-k-transporter-kup
#19
Souichiro Kato, Yoshiki Kanata, Wataru Kitagawa, Teruo Sone, Kozo Asano, Yoichi Kamagata
Biological incorporation of cesium ions (Cs(+)) has recently attracted significant attention in terms of the possible applications for bioremediation of radiocesium and their significant roles in biogeochemical cycling. Although high concentrations of Cs(+) exhibit cytotoxicity on microorganisms, there are a few reports on the promotive effects of Cs(+) on microbial growth under K(+)-deficient conditions. However, whether this growth-promoting effect is a common phenomenon remains uncertain, and direct correlation between growth promotion and Cs(+) uptake abilities has not been confirmed yet...
May 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28511355/identification-of-polar-transformation-products-and-high-molecular-weight-polycyclic-aromatic-hydrocarbons-pahs-in-contaminated-soil-following-bioremediation
#20
Leah Chibwe, Cleo L Davie-Martin, Michael D Aitken, Eunha Hoh, Staci L Massey Simonich
Bioremediation is a technique commonly used to reduce the toxicity associated with polycyclic aromatic hydrocarbons (PAHs) in contaminated soils. However, the efficacy of bioremedial applications is evaluated based on the removal of a subset of parent (or unsubstituted) PAHs and does not incorporate toxic polar transformation products or the more mutagenic high molecular weight PAHs (MW≥302amu or MW302-PAHs). Previously, an effects-directed analysis approach was used to assess the effect of bioremediation on the toxicity of a coal tar-contaminated soil...
May 12, 2017: Science of the Total Environment
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