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Environmental Science: Processes & Impacts Vol -19

Environmental Science: Processes & Impacts Vol - 19 Issue - 4

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Outstanding Reviewers for Environmental Science: Processes & Impacts in 2016

A strategic screening approach to identify transformation products of organic micropollutants formed in natural waters

Emerging investigator series: dual role of organic matter in the anaerobic degradation of triclosan

Aqueous singlet oxygen reaction kinetics of furfuryl alcohol: effect of temperature, pH, and salt content

Arsenic in residential soil and household dust in Cornwall, south west England: potential human exposure and the influence of historical mining

Unexpectedly high concentrations of monoterpenes in a study of UK homes

Wood combustion particles induce adverse effects to normal and diseased airway epithelia

Particle size specific distribution of perfluoro alkyl substances in atmospheric particulate matter in Asian cities

Distribution, sources and ecological risk of polycyclic aromatic hydrocarbons in the estuarine–coastal sediments in the East China Sea

Concentrations and sources apportionment of polycyclic aromatic hydrocarbons in sediments from the Uganda side of Lake Victoria

Anoxia stimulates microbially catalyzed metal release from Animas River sediments

Modelling metaldehyde in catchments: a River Thames case-study

The fate and transformation of tetrabromobisphenol A in natural waters, mediated by oxidoreductase enzymes

Uranium mobility and accumulation along the Rio Paguate, Jackpile Mine in Laguna Pueblo, NM

Effects of synthetic iron and aluminium oxide surface charge and hydrophobicity on the formation of bacterial biofilm

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Environmental Science: Processes & Impacts Vol - 19 Issue - 3

Environmental Science: Processes & Impacts Vol - 19 Issue - 2

Environmental Science: Processes & Impacts Vol - 19 Issue - 1

Environmental Science: Processes & Impacts Vol -18

Effects of synthetic iron and aluminium oxide surface charge and hydrophobicity on the formation of bacterial biofilm

Content Provider	Royal Society of Chemistry (RSC)
Author	Banwart, Steve A. Romero-Gonzalez, Maria Pouran, Hamid M.
Copyright Year	2017
Abstract	In this research, bacterial cell attachments to hematite, goethite and aluminium hydroxide were investigated. The aim was to study the effects of these minerals' hydrophobicity and pH-dependent surface charge on the extent of biofilm formation using six genetically diverse bacterial strains: Rhodococcus spp. (RC92 & RC291), Pseudomonas spp. (Pse1 & Pse2) and Sphingomonas spp. (Sph1 & Sph2), which had been previously isolated from contaminated environments. The surfaces were prepared in a way that was compatible with the naturally occurring coating process in aquifers: deposition of colloidal particles from the aqueous phase. The biofilms were evaluated using a novel, in situ and non-invasive technique developed for this purpose. A manufactured polystyrene 12-well plate was used as the reference surface to be coated with synthesized minerals by deposition of their suspended particles through evaporation. Planktonic phase growth indicates that it is independent of the surface charge and hydrophobicity of the studied surfaces. The hydrophobic similarities failed to predict biofilm proliferation. Two of the three hydrophilic strains formed extensive biofilms on the minerals. The third one, Sph2, showed anomalies in contrast to the expected electrostatic attraction between the minerals and the cell surface. Further research showed how the solution's ionic strength affects Sph2 surface potential and shapes the extent of its biofilm formation; reducing the ionic strength from ≈200 mM to ≈20 mM led to a tenfold increase in the number of cells attached to hematite. This study provides a technique to evaluate biofilm formation on metal-oxide surfaces, under well-controlled conditions, using a simple yet reliable method. The findings also highlight that cell numbers in the planktonic phase do not necessarily show the extent of cell attachment, and thorough physicochemical characterization of bacterial strains, substrata and the aquifer medium is fundamental to successfully implementing any bioremediation projects.
Starting Page	622
Ending Page	634
Page Count	13
File Format	HTM / HTML PDF
ISSN	20507887
Volume Number	19
Issue Number	4
Journal	Environmental Science: Processes & Impacts
DOI	10.1039/c6em00666c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Pseudomonas Hematite Goethite Aluminium hydroxide Hydrophobe Biofilm Rhodococcus Sphingomonas Polystyrene Hydrophile Ionic strength Aquifer Bioremediation
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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Adsorption of Strontium onto Synthetic Iron(III) Oxide up to High Ionic Strength Systems

Iron oxide nanoparticles induce Pseudomonas aeruginosa growth, induce biofilm formation, and inhibit antimicrobial peptide function

Iron-oxide mineralogy of banded iron formations in the Takab region, North Western Iran

Mechanisms of selenate adsorption on iron oxides and hydroxides.

Synthetic Ni Goethite and Hematite Synthetic Ni Goethite and Hematite : Reproducing Hosts for Nickel Mineralization

Sorption of sulfate on iron oxide minerals: Hematite and goethite

Iron Ore Resources and Beneficiation Practices

The formation of corundum and aluminous hematite by the thermal dehydroxylation f aluminous goethite (1989)

Interactions of Plutonium and Neptunium with Iron Oxide Minerals Goethite and Hematite

Effects of synthetic iron and aluminium oxide surface charge and hydrophobicity on the formation of bacterial biofilm

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Iron-oxide mineralogy of banded iron formations in the Takab region, North Western Iran

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Synthetic Ni Goethite and Hematite Synthetic Ni Goethite and Hematite : Reproducing Hosts for Nickel Mineralization

Sorption of sulfate on iron oxide minerals: Hematite and goethite

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Effects of synthetic iron and aluminium oxide surface charge and hydrophobicity on the formation of bacterial biofilm