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Thursday, July 30, 2020 | History

2 edition of Microbially enhanced chemisorption of heavy metals(MECHM) found in the catalog.

Microbially enhanced chemisorption of heavy metals(MECHM)

Gabriella Basnak

Microbially enhanced chemisorption of heavy metals(MECHM)

by Gabriella Basnak

  • 329 Want to read
  • 28 Currently reading

Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D) - University of Birmingham, School of Biological Sciences, Faculty of Science.

Statementby Gabriella Basnak.
ID Numbers
Open LibraryOL18057806M

biomineralization, microbially enhanced chemisorption of metals, biodegradation of chelating agents and bioleaching. Biosorption is chosen as the most Fig. 1 — Effect of heavy metal salt (up to 12 mM concentration) on cell viability after 48 hrs and 72 hrs exposure. The use of microbially produced surfactants (biosurfactants) is an alternative with potential for remediation of metal-contaminated soils. The distinct advantage of biosurfactants over whole cells or exopolymers is their small size, generally biosurfactant molecular weights are .

Define microbially. microbially synonyms, microbially pronunciation, microbially translation, English dictionary definition of microbially. n. A minute life form; a microorganism, especially a bacterium that causes disease. @article{osti_, title = {Literature review on the use of bioaccumulation for heavy metal removal and recovery. Volume 2}, author = {Benemann, J R and Wilde, E W}, abstractNote = {Bioaccumulation of metals by microbes -- `` bioremoval`` -- is a powerful new technology for the concentration, recovery, and removal of toxic heavy metals and radionuclides from waste .

Based on the myriad discoveries of microbially produced drugs useful as antibiotics, immune-suppressive agents, and anticancer compounds from terrestrial sources, the marine and freshwater environment--especially the deep-sea sediments and hydrothermal vents--should provide for unusual small and macromolecules with unique and exploitable functions. Microbially enhanced uptake of metals by plants has been observed for various plants, microorganisms, and metals (20,– 29). Farinati et al. (28, 29) grew A. halleri in hydroponic cultures, which they inoculated with an “extracted” rhizosphere microbial community.


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Microbially enhanced chemisorption of heavy metals(MECHM) by Gabriella Basnak Download PDF EPUB FB2

Immobilized cells of a Citrobacter sp. removed neptunium and plutonium negligibly from solution using an established technique that used biologically-produced phosphate ligand (Pi) for metal phosphate bioprecipitation. Removal of these transuranic radionuclides was enhanced by prior exposure of the biomass to lanthanum in the presence of organophosphate substrate to form Cited by:   Basnakova G, Macaskie LE () Microbially enhanced chemisorption of nickel into biologically synthesized hydrogen uranyl phosphate: a novel system for the removal and recovery of metals from aqueous solutions.

Biotechnol. Bioeng. Cited by: 8. A new mechanism for the removal of heavy metals via microbially enhanced chemisorption is proposed. Keywords In Biosorption of heavy metals, B.

Volesky ed., 93–, CRC. Press, Boca Raton, FL. Google Scholar. Pham-Thi, M., Colomban, P. () Solid State Ion Cited by: 9. Transuranic element removal by this technique, generically described as microbially-enhanced chemisorption of heavy metals (MECHM), is via a hybrid of bioaccumulative and chemisorptive mechanisms.

Microbially-Enhanced Chemisorption of Heavy Metals: A Method for the Bioremediation of Solutions Containing Long-Lived Isotopes of Neptunium and Plutonium Cited by: Basnakova, G.

and Macaskie, L.E. () Microbially enhanced chemisorption of nickel into biologically synthesized hydrogen uranyl phosphate: A novel system for the removal and recovery of metals from aqueous solutions, Biotechnol. Bioengrg. 54, Cited by: 3.

We propose ‘Microbially Enhanced Chemisorption of Heavy Metals’ (MECHM) to describe this hybrid mechanism of metal bioaccu-mulation via intercalation into preformed, biogenic crystals, and note.

The effects of mesopore architecture in hierarchical zeolites on heavy metal removal were investigated. • Adsorption of Ni 2+ was dependent on pore geometry due to the phyllosilicate nanosheet formation. Adsorption of Pb 2+ or Cu 2+ was dependent on cation exchange determined by the framework composition.

Zeolite crystallinity, mesoporosity, and adsorbate. Biological methods however offer wide range of inexpensive treatment techniques for safe removal of toxic e-waste components. The major bioremediation techniques used for e-waste management are bioleaching, biosorption, bioaccumulation, biotransformation, biomineralization, microbially enhanced chemisorption of metals, and phytoremediation.

Elevated heavy metal soils and water contamination have been shown to impose toxic effects on plants, animals, and human health. The extent of toxicity depends on the nature of the metals, soil and aquatic system characteristics, and the complex interactions between metals and the.

Xing, J.J. Pignatello, in Encyclopedia of Soils in the Environment, Chemisorption. Chemisorption entails appreciable overlap of molecular orbitals between sorbate and sorbent, such as ligand–metal coordination bonds and covalent bonds.

Molecules capable of chemisorption may also be capable of physisorption. Despite a great number of reports in the literature about the adsorption of heavy metals by carbon adsorbents, few have conducted quantitative evaluation of the roles of function groups in heavy metal adsorption.In general, the inter-molecular interactions between functional groups and heavy metals are complex, depending on the heterogeneity.

Basnakova, G. and Macaskie, L. () Microbially enhanced chemiosorption of nickel into biologically synthesized hydrogen uranyl phosphate: a novel system for the removal and recovery of metals from aqueous solutions.

Biotechnol. Bioeng. 54, – PubMed CrossRef Google Scholar. Journals & Books; Help Volume 8, Is OctoberPages Heavy metal adsorption on bacterially produced FeS Microbially produced adsorbent.

iron sulphide. heavy metals. chemical stability. chemisorption. Recommended articles Citing articles (0). This technique for efficient removal of Ni from solution has been generically termed microbially enhanced chemisorption of heavy metals (MECHM).

The nickel uranyl phosphate deposits bound to Citrobacter sp. cells immobilized in polyacrylamide gel (PAG) were analyzed using scanning transmission electron microscopy with electron probe X-ray microanalysis (EPXMA) and.

Heavy metal migration through compacted, saturated sand and bentonite/soil admixtures were investigated using kinetic, batch sorption tests, and column tests. Sorption of Pb, Zn, and Cd at pH 5 by bentonite is found to be, and mL/g, respectively. 3. Heavy metals: negative impact and water remediation.

Poisonous heavy metals are any relatively metalloid and dense metals which have high potential toxicity (Srivastava and Goyal, ). In general, heavy metals have an atomic weight range of between andand a density greater than 5 g/cm3 (Fu and Wang, ).

Heavy metals can. Microbially-Enhanced Chemisorption of Heavy Metals: A Method for the Bioremediation of Solutions Containing Long-Lived Isotopes of Neptunium and Plutonium Article Jan Heavy oil contains asphaltenes and resins.

It is “heavy” (dense and viscous) due to the high ratio of aromatics and naphthenes to paraffins (linear alkanes) and high amounts of NSOs (nitrogen, sulfur, oxygen, and heavy metals).

The carbon chain in heavy oil has over 60 carbon atoms which results in a high boiling point and molecular weight. Efficiency of microbially assisted phytoremediation of heavy-metal contaminated soils.

Katarzyna Hrynkiewicz, a b Michał Złoch, b c Tomasz Kowalkowski, b c Christel Baum, d Bogusław Buszewski b c. a Department of Microbiology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Lwowska 1, Torun, Poland.

Fresh water accounts for 3% of water resources on the Earth. Human and industrial activities produce and discharge wastes containing heavy metals into the water resources making them unavailable and threatening human health and the ecosystem.

Conventional methods for the removal of metal ions such as chemical precipitation and. In microbially-enhanced chemisorption of metals a series of chemical reactions in which microbes first precipitate a bio-mineral of a non-target metal known as priming deposits, the priming deposits, then act as a nucleation focus for the subsequent deposition of the target metal.How is Microbially Enhanced Chemisorption of Heavy Metals abbreviated?

MECHM stands for Microbially Enhanced Chemisorption of Heavy Metals. MECHM is defined as Microbially Enhanced Chemisorption of Heavy Metals very rarely.(English) In: Environmental Science and Technology, ISSN X, E-ISSNVol.

32, no 6, p. Article in journal (Refereed) Published Abstract [en] Immobilized cells of a Citrobacter sp. can remove heavy metals from wastewaters by deposition ofmetals with enzymatically liberated phosphate.