• Role of Humic Acid and Quinone Model Compounds in Bromate ...

    Experiments were conducted to examine the role of humic acid and quinone model compounds in bromate reduction by Fe(0). The reactivity of Fe(0) toward bromate declined by a factor of − in the presence of humic acid.

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  • Complete List of Cation and Anions EndMemo

    Chemical Elements, Periodic Table » Compound Name Formula Search » Moles to Grams Calculator » Common Compounds List » Chemical Equation Balancer » Complete List of Acids » Complete List of Bases » Molar to Mass Concentration Converter » Molar Mass Calculator » Cations, Anions List » Dilution Calculator » Molarity Calculator ...

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  • Chemistry Terms: Table of Common Cations ThoughtCo

    Iron(II) Fe 2+ Ferrous Iron(III) Fe 3+ Ferric Hydrogen: H + Hydronium: H 3 O + Oxonium Lead(II) Pb 2+ Lithium: Li + Magnesium: Mg 2+ Manganese(II) Mn 2+ Manganous Manganese(III) Mn 3+ Manganic Mercury(I) Hg 2 2+ Mercurous Mercury(II) Hg 2+ Mercuric Nitronium: NO 2 + Potassium: K + Silver: Ag + Sodium: Na + Strontium: Sr 2+ Tin(II) Sn 2+ Stannous Tin(IV) Sn 4+ Stannic Zinc

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  • Redox Titrations | Introduction to Chemistry

    Other Types of Redox Titrations. Most often, the reduction of iodine to iodide is the last step in a series of reactions in which the initial reactions are used to convert an unknown amount of the analyte to an equivalent amount of iodine, which can then be titrated. Sometimes halogens (or organic compounds containing halogens)...

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  • RoomTemperature SpinTransition Iron Compounds | SciTechnol

    RoomTemperature SpinTransition Iron Compounds. Nayathuparambil Thomas Madhu 1,2 *, Esther Theresa Knittl 4, Tegene Desalegn Zeleke 3, Alemu Gonfa Robi 2 and Wolfgang Linert 4 * 1 Department of Chemistry, Adddis Ababa Science and Technology University, Addis Ababa,, Ethiopia

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  • Kinetics and oxidative mechanism for H2O2enhanced iron ...

    Kinetics and oxidative mechanism for H 2 O 2enhanced ironmediated aeration (IMA) treatment of recalcitrant organic compounds in mature landfill leachate Yang Deng, James Douglas Englehardt Civil, Architectural Environmental Engineering

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  • Complexation of Iron and Copper in Ambient Particulate ...

    A novel fractionation scheme was developed to segregate three different fractions of Fe and Cu present in ambient PM : (i) complexed with hydrophobic organic compounds, (ii) complexed with hydrophilic organic compounds, and (iii) free or inorganic metal fraction. A solid phase extraction (C18) column was used to separate these fractions.

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  • Niobium Element information, properties and uses ...

    Both niobium and tantalum are found together in the mineral columbite, a mixed oxide that also contains iron and manganese, and they have similar chemical and physical properties. In fact Niobium was originally named columbium after Columbia, because of its .

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  • CSIRO PUBLISHING | Environmental Chemistry

    Environmental context. Reactions in natural waters such as lakes and streams are thought to be extremely slow in the absence of sunlight ( at night). We demonstrate that in the presence of iron, hydrogen peroxide and certain bacteria (all of which are common in natural waters), certain reactions may occur surprisingly quickly.

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  • :::AMD Basics PYRITE REACTIONS:::

    Pyrite reactions. Thus ferrous ions and acidic hydrogen ions are released into the waters that runoff through the mine tunnels or refuge piles. The pH of the water will likely go down depending on just how often this reaction occurs. While dissolved, ferrous iron (Fe 2+ (aq) ) and sulfate ions (SO 42...

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  • Degradation of carbon tetrachloride in the presence of ...

    The effect of several sulphur compounds: sodium sulphate, sodium sulphide, ferrous sulphide, pyrite and an organosulphonic acid on the kinetics of the iron (Fe 0) induced degradation of carbon tetrachloride was examined under aerobic conditions. It was observed that all of the sulphur compounds investigated significantly accelerated the reaction.

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  • Kinetics of halogenated organic compound degradation by ...

    However, normalization of these data to iron surface area concentration yields a specific rate constant (k(SA)) that varies by only 1 order of magnitude for individual halocarbons. Correlation analysis using k(SA) reveals that dechlorination is generally more rapid at saturated carbon centers than unsaturated carbons and that high degrees of halogenation favor rapid reduction.

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  • Novel FePd/SiO2 catalytic materials for degradation of ...

    AbstractNovel reactive materials for catalytic degradation of chlorinated organic compounds in water at ambient conditions have been prepared on the basis of silicasupported PdFe nanoparticles. Nanoscale FePd particles were synthesized inside porous silica supports using (NH4)3[Fe(C2O4)3] and [Pd(NH3)4]Cl2 or Pd acetate as reaction precursors.

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  • Mössbauer study on ironpolygalacturonate coordination ...

    ICP analysis was applied to study the iron content of the coordination compounds. It was found that there are two ferrous and one ferric microenvironments in the compound. In the iron polygalacturonate compound the ferrous forms occur dominantly. A model for the bonding of Fe in the polygalacturonate chains is proposed.

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  • Mercury isotope effects in the environmental chemistry and ...

    chemical species: Hg0 atomic vapour, mono and divalent mercury salts; methylation of the latter gives the most toxic organic compounds combined by the common name, monomethylmercury CH3HgX(X=Cl,Br,OH,CH3 etc.). The mechanisms of mercury distribution among chemical compounds, phase states and geographical ranges and its routes

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  • Mössbauer characterisation of Fepolygalacturonate as a ...

    57 Fe Mössbauer spectroscopy was used to study the effect of iron concentration on the oxidation state and microenvironments of iron in Fepolygalacturonate compounds prepared by a novel method from pectin. The iron concentration of the coordination compounds was determined by inductively coupled plasma optical emission spectrometry analysis.

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  • Adsorption performance and discoloring behavior of nickel ...

    WANG Juntao1*,CHEN Lanping1,ZHAN Zhengkun2( of Chemistry and Life Science,Xianning College,Xianning 437100,Hubei,China; of Chemistry,Central China Normal University,Wuhan 430079,Hubei,China);Adsorption lead ion in waste water by metallic oxides derived from CuZnMgAlhydrotalcites[J];Chemical Research;201201

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  • (PDF) Mössbauer study on ironpolygalacturonate ...

    ICP analysis was applied to study the iron content of the coordination compounds. It was found that there are two ferrous and one ferric microenvironments in the compound. In the iron polygalacturonate compound the ferrous forms occur dominantly. A model for the bonding of Fe in the polygalactur onate chains is proposed.

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  • Need explanation for: In the compound , the ...

    Need explanation for: In the compound , the percent of iron existing as Fe (III) is In the compound Fe O, the percent of iron existing as Fe (III) is Option 1)

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  • Nanostructured Materials for Environmental Decontamination ...

    Trichloroethylene remediation using nanoscale iron/silica aerosol particles. In: Preprints of Extended Abstracts Presented at the ACS National Meeting, American Chemical Society, Division of Environmental Chemistry, 2007;47(2):.

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  • Degradation of chloropicrin in the presence of zero‐valent ...

    Batch experiments were performed to investigate the reaction pathways and kinetics of three HNMs (chloropicrin or trichloronitromethane [TCNM], dichloronitromethane [DCNM], and chloronitromethane [CNM]) with zero‐valent iron (Fe 0).

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  • Biotic and Abiotic Reductive Transformation of Chlorinated ...

    Microcosm studies will be employed to screen for dechlorination activity in pure cultures and enrichments of ironreducing bacteria with a variety of chlorinated compounds, including: hexachloroethane, tetrachloroethylene, 1,1,1trichloroethane, and carbon tetrachloride.

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