Ferrate(VI) oxidation of aqueous cyanide

Article Abstract:

Investigations into the mechanics of the oxidation of cyanide with Fe(VI) showed that pH is the determining factor for the rate of oxidation. Further investigations into the Fe(VI) removal efficiency showed that a pH 9 environment was the best environment for effecting Fe(VI) removal, and was also the best environment in which to effect a 1:1 stoichiometric conversion of cyanide to nitrite ion. Further testing showed Fe(VI) as a safe oxidative treatment for the removal of cyanide in wastewater.

Waste Management and Remediation Services, Water Pollution, Usage, Iron, Iron (Metal), Cyanides

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Ferrate(VI) oxidation of hydrogen sulfide

Article Abstract:

Fe(VI) can serve as an effective oxidant in the removal of hydrogen sulfide from polluted waters. The compound hastened the oxidation of hydrogen sulfide whose rates were made anaerobically as a function of pH (7-12) and temperature at 5 to 15 degrees Celsius. Results indicate that the rates of hydrogen sulfide oxidation decreases with an increase in pH. A higher concentration of Fe(VI) in the total hydrogen sulfide present results to the full oxidation of hydrogen sulfide to sulfate.

Hydrogen Sulfide, Ferrous Sulfate, Iron compounds, Oxidizing agents, Sulfates, Ferrites (Magnetic materials)

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Low parts per billion determination of sulfide by coulometric argentometry

Article Abstract:

A semi-automated method, with a method detection limit of 2.5 microng/L-1, proved useful in measuring sulfide content in wastewaters to low ppb levels with nearly a 500-fold linear range. The method performed well even in the presence of chemical interferences such as metals, halides, and nitrogen-base salts. Furthermore, the method is not affected by solution turbidity.

Sulfur Compounds, Methods, Sulfides, Electrochemical analysis

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