Abstract
The extraction mechanism of molybdenum(VI) ions from model solutions with iron-containing metalworking wastes is studied. The experimental X-ray phase analysis and energy dispersive microanalysis data indicate that iron(III) molybdate appears in the first chemisorption stages with the subsequent formation of layers enriched in molybdenum(VI) oxide. The kinetics of the chemisorption of molybdenum(VI) ions from model solutions with iron-containing metalworking wastes is studied. We showed that the total exchange capacity of the modified steel chips having a specific surface of more than 15 cm2/g relative to molybdenum(VI) ions is limited only by the corrosion rate of steel chips and is achieved after its complete dissolution. The effectiveness of the chemisorption process is found. We also showed that iron-containing metalworking waste may be used for the purification of wastewater from molybdenum(VI) ions to the standard values.
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