pyrite oxidation lipid

The effect of adsorbed lipid on pyrite oxidation under The choice of lipid, 1,2bis(10,12tricosadiynoyl)snGlycero3Phosphocholine lipid (23:2 Diyne PC), a phosph

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pyrite oxidation lipid

  • The effect of adsorbed lipid on pyrite oxidation under

    The choice of lipid, 1,2bis(10,12tricosadiynoyl)snGlycero3Phosphocholine lipid (23:2 Diyne PC), a phosphocholine lipid, was based on earlier work that showed that this lipid inhibits the abiotic oxidation rate of pyrite Atomic force microscopy showed that under the experimental conditions used in this study, the lipid formed ~4–20 nmIn this contribution we extend our investigation of 23:2 Diyne PC as an adsorbed phase that inhibits pyrite oxidation Prior studies have shown that the ultraviolet (UV) irradiation of this lipid,[] which has diacetylene groups in its hydrocarbon tails, leads to cross linking and polymerization in circumstances where there is a favorable alignment of neighboring lipid molecule tailsPyrite oxidation inhibition by a crosslinked lipidThe effect of a diacetylenecontaining phospholipid on the oxidation of pyrite, FeS 2, was investigatedEarlier work reported by our research group showed that the adsorption of l,2bis(10,12tricosadiynoyl)snglycero3phosphocholine on pyrite suppressed the extent of its oxidation by about 75% over a specific time periodResults presented here show that the prePyrite oxidation inhibition by a crosslinked lipid

  • Pyrite oxidation inhibition by a crosslinked lipid coating

    Article Pyrite oxidation inhibition by a crosslinked lipid coating Xiang Zhang,a Michael J Borda,b Martin A A Schoonenb and Daniel R Strongin*a aDepartment of Chemistry, Temple University, Philadelphia, PA 19122 Email: bGeosciences Department, The State University of New York at Stony Brook, Stony Brook, NY 117942100Pyrite was leached with a solution containing Fe3+ but no coating agent and three different solutions or treatments: a lipid treatment, a silicate treatment, and a lipid + silicate treatment Pyrite oxidation was based on iron (Fe3+, Fe2+) leached out of a continuousflow porousbed reactor systemInhibition of pyrite oxidation by a phospholipid in theThe reaction mechanism for pyrite oxidation at pH 2 is first order for pyrite leached by solutions containing only ferric, ferric together with silicate, and ferric combined with silicate and lipid The only treatment that effectively prevented pyrite oxidation at pH 2 was the lipid treatmentInhibition of Pyrite Oxidation by a Phospholipid in the

  • Effects of phospholipid on pyrite oxidation in the

    The amount of pyrite oxidation, however, is similar for pyrite and lipid/pyrite in the presence of mixed communities of A ferrooxidans and A acidophilum after 30 days Pretreatment of lipid/pyrite with UV prior to exposure to bacteria leads to a significant oxidation suppression when compared to the corresponding system that did not receiveDetermination of the pyrite oxidation rate by either reaction parameter gave results that agreed within 1–5% In short, these control experiments indicated that the reduction in Fe 3+ release into solution during pyrite oxidation is due to the lipid impeding the pyrite oxidation process and not due to lipid complexation with aqueous Fe 3+Suppression of pyrite oxidation in acidic aqueousThe lipid is superior to the silicate in suppressing pyrite oxidation at both pH 2 and pH 6 Also, the presence of silicates decreased the ability for the lipid to suppress pyrite oxidation, bothInhibition of Pyrite Oxidation by a Phospholipid in the

  • Effect of Phospholipid on Pyrite Oxidation and Microbial

    The effect of phospholipid on the biogeochemistry of pyrite oxidation, which leads to acid mine drainage (AMD) chemistry in the environment, was investigated Metagenomic analyses were carried out to understand how the microbial community structure, which developed during the oxidation of pyriteconThe choice of lipid, 1,2bis(10,12tricosadiynoyl)snGlycero3Phosphocholine lipid (23:2 Diyne PC), a phosphocholine lipid, was based on earlier work that showed that this lipid inhibits the abiotic oxidation rate of pyrite Atomic force microscopy showed that under the experimental conditions used in this study, the lipid formed ~4–20 nmThe effect of adsorbed lipid on pyrite oxidation underThe suspension lipids as a oxidation suppression agent developed from an was sonicated for 30 min to increase the solubility of the lipid earlier observation in our laboratory that showed that and to promote the disruption of large multilamellar vesicles phosphate adsorbed alone on pyrite decreased the extent of (LMV) that were presumably(PDF) Pyrite oxidation inhibition by a crosslinked lipid

  • Inhibition of Pyrite Oxidation by a Phospholipid in the

    The reaction mechanism for pyrite oxidation at pH 2 is first order for pyrite leached by solutions containing only ferric, ferric together with silicate, and ferric combined with silicate and lipid The only treatment that effectively prevented pyrite oxidation at pH 2 was the lipid treatmentThe lipid is superior to the silicate in suppressing pyrite oxidation at both pH 2 and pH 6 Also, the presence of silicates decreased the ability for the lipid to suppress pyrite oxidation, bothInhibition of Pyrite Oxidation by a Phospholipid in theThe effect of phospholipid on the biogeochemistry of pyrite oxidation, which leads to acid mine drainage (AMD) chemistry in the environment, was investigated Metagenomic analyses were carried out to understand how the microbial community structure, which developed during the oxidation of pyriteconEffect of Phospholipid on Pyrite Oxidation and Microbial

  • Effects of phospholipid on pyrite oxidation in the

    Pyrite oxidation occurring in solutions containing iron oxidizing autotrophic bacteria, Acidithiobacillus ferrooxidans ( A ferrooxidans), and/or heterotrophic bacteria, Acidiphilium acidophilum ( A acidophilum), has been investigated Under the conditions used, the amount of pyrite oxidized in the presence of both species was similar to the amount oxidized in the报告题目:(1)纳米结构高取向旋磁铁氧体制备、结构与性能研究(2)Elucidation of Polymerized and nonPolymerized Nano Size Lipid Structure Formation Schemes on Pyrite and Their Effects on Abiotic and Biotic Pyrite Oxidation报告人:(1)南京学术报告:纳米结构高取向旋磁铁氧体制备、结构与性能研究The modelled total deep pyrite oxidation over a 3 Myr model run is 120 Pmol (10–176 Pmol for the extreme cases shown in Supplementary Fig 8c), which is roughly 60% (75–135%) of the amount ofConsistent CO2 release by pyrite oxidation on continental

  • Limited role of sessile acidophiles in pyrite oxidation

    Pyrite (FeS 2) is the most abundant sulfide mineral on earth and is found in most mining environmentsIt is frequently associated with coals and Cu, Co, Ni and Zn sulfide ores Its oxidation isThe pyrite/lipid suspension was mixed for 10 minutes and then transferred into 100 mL of pH 2 deionized water The control experiment, to which the lipid/pyrite oxidation rate results were compared, consisted of 04 g of acid washed pyrite in the 100 mL of pH 2 deionized waterMethod for inhibiting oxidation of metal sulfideBibTeX @MISC{Zhang03pyriteoxidation, author = {Xiang Zhang and A Michael J Borda and Daniel R Strongin A}, title = {Pyrite oxidation inhibition by aPyrite oxidation inhibition by a crosslinked lipid

  • Effect of Phospholipid on Pyrite Oxidation and Microbial

    The effect of phospholipid on the biogeochemistry of pyrite oxidation, which leads to acid mine drainage (AMD) chemistry in the environment, was investigated Metagenomic analyses were carried out to understand how the microbial community structure, which developed during the oxidation of pyritecontaining coal mining overburden/waste rock (OWRAn ironmediated oxidation reaction, Fentonlike reaction, produced an expected degree of lipid extraction, but pyrite was less effective than FeCl3 commercial powder That low efficiency was improved by using oxidized pyrite, which showed an equivalent lipid extraction efficiency to FeCl3, about 90%, when 20 mM of catalyst was usedLipid extraction and esterification for microalgaebased报告题目:(1)纳米结构高取向旋磁铁氧体制备、结构与性能研究(2)Elucidation of Polymerized and nonPolymerized Nano Size Lipid Structure Formation Schemes on Pyrite and Their Effects on Abiotic and Biotic Pyrite Oxidation报告人:(1)南京学术报告:纳米结构高取向旋磁铁氧体制备、结构与性能研究

  • Method for inhibiting oxidation of metal sulfide

    The pyrite/lipid suspension was mixed for 10 minutes and then transferred into 100 mL of pH 2 deionized water The control experiment, to which the lipid/pyrite oxidation rate results were compared, consisted of 04 g of acid washed pyrite in the 100 mL of pH 2 deionized waterThe exposure of pyrite (FeS2) to atmospheric conditions during mining activity causes a series of complex oxidation reactions, resulting to acid generation and the subsequent release of toxic heavy metals in the surrounding aquatic and terrestrial ecosystems The produced acidic mine waters, known as acid mine drainage (AMD), constitute one the major environmentalSuppression of Pyrite Oxidation by Surface Silica CoatingPyrite (FeS 2) is the most abundant sulfide mineral on earth and is found in most mining environmentsIt is frequently associated with coals and Cu, Co, Ni and Zn sulfide ores Its oxidation isLimited role of sessile acidophiles in pyrite oxidation

  • Adenine oxidation by pyritegenerated hydroxyl radicals

    Pyrite (FeS 2), the most common metal sulfide mineral associated with coal and metal mine waste, has been shown to generate hydrogen peroxide (H 2 O 2) [1, 2] and hydroxyl radicals (• OH) [3, 4] when placed in waterIn the presence of dissolved molecular oxygen, ferrous iron associated with pyrite can form superoxide anion (O 2 •)(eq 1), which reacts with ferrousa, Pyrite is formed and buried (olive) in shelf sediments together with carbonatesb, Pyritebearing sediments are being exposed, resulting in pyrite oxidation and the formation of acidic drainageConsistent CO2 release by pyrite oxidation on continentalFormal oxidation states for pyrite, marcasite, and arsenopyrite From the perspective of classical inorganic chemistry, which assigns formal oxidation states to each atom, pyrite is probably best described as Fe 2+ S 2 2 ThisPyrite McGill University School of Computer Science

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