Simultaneous determination of Iron(III), Iron(II), and Manganese(II) in environmental samples by ion chromotography

Article Abstract:

A new chromatographic technique for analyzing transition metals such as iron(II), iron(III), and manganese(II) as an alternative to the tedious method using spectrophotometry. The new approach utilizes a high-performance polymer-coated silica-based cation exchange column to separate acid-extracted samples from the metals. Results from the technique's testing confirmed its suitability in detecting transition metals and iron from valence composition of environmental samples.

Chromatographic Analyzers, Transition metals, Chromatographs, Chromatography, Chromatographic analysis

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Speciation of dissolved iron(II) and manganese (II) in a groundwater pollution plume

Article Abstract:

Iron(II) and Manganese(II) speciation in a groundwater pollution plume shows that Iron and Manganese were truly dissolved with solution rates averaging 90% and 91% respectively. Speciation experiments with MINTEQA2 also show that around 65% of the pollutants are present as divalent ions and are supersaturated with respect to carbonates. Computations show that the iron(II) and manganese(II) were present as bicarbonate complexes in the order of 19% and 20% respectively.

Industrial Water Pollution, Testing, Pollution, Water, Underground, Groundwater, Water quality

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Real-time continuous Mn(II) monitoring in lakes using a novel voltammetric in situ profiling system

Article Abstract:

A novel voltammetric in situ profiling system (VIP) was utilized as a new method for determining Mn(II) levels in aquatic systems such as lakes. The system, which uses a gel-integrated microsensor and a group of microelectrodes to prevent surface fouling from organic matter, permits direct measurements in complex media. The new technique, which allows for in situ surveying of natural systems, compares with traditional techniques such as chemical laboratory analysis.

Water Pollution, Coulometric Equip, Environmental aspects, Manganese, Voltammetry, Electrochemical instruments

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