MODIFICATION OF STRUCTURAL AND SORPTION PROPERTIES OF ZEOLITE DURING REMOVAL OF AMMONIUM AND IRON IONS FROM GROUNDWATER
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This paper presents the results of a comprehensive study on the changes in the textural and adsorption characteristics of the natural zeolite brand "Tseol" during its operation as a filter medium in second-stage filters at an iron removal plant. Water vapor adsorption-desorption methods at 20°C established that operation leads to a statistically significant reduction in the specific surface area (from 251.92 to 225.97 m2/g by the BET method) and the total pore volume (from 75.013 to 67.285 cm3/g). Based on the experimental data, a hydrochemical model of the loading operation cycle combining sorption and ion exchange was developed. To preserve the service life of the filter medium, optimization of the preceding treatment stage aimed at reducing iron and organic substance concentrations in the feed water is necessary.
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References
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