manganese Articles

  • Welding Fumes and the effects of Manganese

    The potential risks of welding operations include the potential to breathe in metal fumes and toxic gases. Fume particles are formed from the vaporisation of molten metal that occurs during the process. These particles are very fine in size and may join together to form larger particles.. The biggest risk is exposure to the manganese contained in fumes that are given off during welding. ...


    By Shawcity Limited

  • Manganese in Madison’s Drinking Water

    Public concern over events of manganese-discolored drinking water and the potential for adverse health effects from exposure to excess manganese reached a high level in 2005. In response, Public Health Madison Dane County, together with the Madison Water Utility, conceived and implemented a public health/water utility strategy to quantify the extent of the manganese problem, determine the ...

  • Filtration and manganese removal

    Manganese removal through a filter bed is generally carried out and accepted by practitioners and researchers as occurring through catalytic oxidation at the surface of MnO2 coated media, although manganese passage through a coated media filter has been little investigated. To better understand the kinetics of Mn removal through a naturally coated filter, a pilot plant consisting of four filter ...


    By IWA Publishing

  • Manganese waste water treatment by fungi derived from manganese slag

    The aim of this study was to isolate a mould from the surface of manganese slag which had strong resistance and high adsorption of Mn2 + , and to determine the effects of initial Mn2 +  concentration, incubation temperature, rotation speed and inoculation amount on adsorption of Mn2 +  from manganese waste water solution. The result showed that a mould (A5) which was isolated from manganese slag ...


    By IWA Publishing

  • Manganese-catalyzed degradation of phosphonic acids

    Abstract The non-biodegradable and chemically very stable phosphonates are used in a variety of industrial applications including cooling waters, oil production and textile industry. We show here that they are degraded in the presence of Mn(II) and oxygen. The half-life for the reaction is 9 min near neutral pH. The presence of other cations such as Ca(II) and Zn(II) considerably slows down the ...


    By Springer

  • Biokinetics of Thiobacillus thiooxidans for manganese bioleaching

    The waste tailing of metals generated during mining processes is degrading the environment by increasing the soil toxicity, leading to disturbances in the ecosystem. This study was initiated to determine the biokinetics of Thiobacillus thiooxidans for manganese bioleaching in the presence of excess sulphur. In batch studies, the effect of manganese concentration on the leaching efficiency of T. ...


    By Inderscience Publishers

  • Efficiencies of advanced formulation Manganese - Case Study

    With manganese being the most commonly deficient trace element in UK soils and potentially impacting on the development, health, quality and yield of arable and vegetable crops, countering deficiencies is a necessity for many farms. John Bird from F D Bird & Sons, tells us how switching to a lower volume product has brought efficiencies in both time and cost.  Treatment of manganese ...


    By Ilex EnviroSciences Limited

  • Rethinking aesthetic guidelines for manganese and iron in drinking water

    Manganese and iron are both internationally known causes of aesthetic issues in drinking water, however, there are limited data supporting their specific aesthetic guidelines, of which typical values are 0.05 mg/L Mn and 0.3 mg/L Fe. This study aims to clarify the concentrations at which off-flavors and off-colors caused by manganese and iron may be detected by consumers. Triangle tests of ...


    By IWA Publishing

  • Impact of speciation on removal of manganese and organic matter by nanofiltration

    The removal of manganese and humic acid (HA) by two nanofiltration membranes, TFC-SR2 and TFC-SR3, was investigated in order to highlight the influence of speciation on manganese and HA retention. Manganese speciation and complexation with HA were modelled to understand how speciation could affect NF removal mechanisms. The behaviour of the two membranes was dramatically different in terms of ...


    By IWA Publishing

  • Biodegradation and decolorization of melanoidin solutions by manganese peroxidase yeasts

    The ability of selected manganese peroxidase (MnP) yeast strains, isolated from the mixed liquor of an activated sludge bioreactor treating melanoidins wastewater, was investigated in this work, aiming to examine the degradation potential of melanoidins, in the presence or absence of nutrients. Ten yeast strains were initially isolated from the mixed liquor; four yeast strains (Y1, Y2, Y3 and ...


    By IWA Publishing

  • Total organic carbon in soils and its relation with manganese concentrations in soils and vegetation close to an abandoned manganese mine

    Abstract: This study aimed at quantifying the total organic carbon (TOC) present in soils within the proximity of the Kgwakgwe Mn oxide ore abandoned mine, Botswana, and establish its relationship with Mn concentrations in soils and vegetation based on multivariate and Geographical Information Systems (GIS) analytical techniques. Four hundred soil samples and 200 vegetation set samples were ...

  • Manganese (Mn) toxicity to tropical freshwater species in low hardness water

    Elevated Manganese (Mn) is a common contaminant issue for mine water discharges and previous studies have reported that its toxicity is ameliorated by H + , Ca2+ and Mg2+ ions. The toxicity of manganese (Mn) was assessed in a high risk scenario, i.e. the slightly acidic, soft waters of Magela Creek, Kakadu National Park, Northern Territory, Australia. Toxicity estimates were derived for six ...


    By John Wiley & Sons, Ltd.

  • City of Moulton, Texas - Arsenic, Iron, Manganese Treatment System

    AdEdge Technologies Inc. (AdEdge) was selected by the City of Moulton and Hejl, Lee, and Associates (HLA) to design a full-scale arsenic treatment project using its Granular Ferric Oxide (GFO) adsorption technology. In addition to designing the system, AdEdge assisted HLA in obtaining a construction permit from the Texas Commission on Environmental Quality (TCEQ) for the system. Supporting ...

  • Project profile - City of Moulton, Texas arsenic, iron, manganese treatment system

    Background AdEdge Technologies Inc. (AdEdge) was selected by the City of Moulton and Hejl, Lee, and Associates (HLA) to design a full-scale arsenic treatment project using its AD26 and Granular Ferric Oxide (GFO) adsorption technology. In addition to designing the system, AdEdge assisted HLA in obtaining a construction permit from the Texas Commission on Environmental Quality (TCEQ) for ...

  • Biological iron and manganese removal, pilot and full scale applications

    Both manganese and iron are found in surface and ground waters at varying concentration levels. When present even at low concentrations they can be linked to the following problems: discolouration, turbidity and taste problems or form slime and iron noxide or manganese dioxide accumulations in pipes. Both metals promote the growth of certain types of chlorine tolerant micro-organisms in water ...

  • Removal of iron and manganese from aqueous solutions using carbon nanotube filters

    Carbon nanotubes (CNTs) have become the focus of attention of many scientists and companies worldwide. CNT-based filters have a prospective advantage in comparison to the commercial filters already in operation because they are light weight and do not require electricity to operate. This investigation handles the filtration efficiency of manganese and iron from aqueous solution using ...


    By IWA Publishing

  • Impact of Redox Cycles on manganese, iron, cobalt, and lead in Nodules

    Redox processes are responsible for Fe and Mn segregation as Fe–Mn oxide coatings or nodules. These nodules are also trace element scavengers in soils. Redox processes are of particular importance in seasonally saturated soil containing naturally high concentrations of trace metals. We investigated the dynamics of Fe–Mn nodules and two associated trace elements, Co and Pb, under controlled redox ...

  • Levels of cadmium, manganese and lead in water and algae; Spirogyra aequinoctialis

    This study assessed the ability of filamentous green algae; Spirogyra aequinoctialis to accumulate manganese, cadmium and lead from water. Water pH was also determined. Samples of S. aequinoctialis and their respective water environments were taken from designated sampling points in the city of Blantyre and Malawi during the ...

  • Manganese levels and chemical fractionation in street dust in South Africa

    Mn in street dust and soil from selected roads was studied to assess the contribution of combustion of vehicular methylcyclopentadienyl manganese tricarbonyl (MMT) to Mn levels and distribution in Pretoria, South Africa. Total Mn concentrations ranged from (329.1-863.9 μg g−1) for dust and (215.8-450.6 μg g−1) for soil. These values were significantly higher than the mean value (278.9 μg g−1) ...


    By Inderscience Publishers

  • Iron and manganese removal from groundwater by filtration through a chalcedonite bed

    The aim of this research was to determine the effectiveness of iron and manganese removal from groundwater using chalcedonite sand as a filter bed in rapid filtration. The experiment was conducted at a pilot plant. At the first stage of research, chalcedonite and silica sand were compared. The ripening time for manganese removal of chalcedonite was 27 days while silica sand was ripened within 57 ...


    By IWA Publishing

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