UDC 66.067.1
DOI 10.35776/VST.2026.09.05

Borisov Igor, Chernousova Natal’ia, Dedov Aleksandr

The effect of the needlefelt density on the sorption capacity of surfactants

Summary

The work objective was developing a model for calculating the mass of needlefelts of varying densities used for removing Tide wash powder from wastewater. The model was developed by processing experimental data of using the needlefelts to remove simulated solutions where the powder concentration significantly exceeded that in household wastewater simplifying the method for measuring purification efficiency. Needlefelts with densities ranging from 92 to 178 kg/m³ were used as test subjects. The needlefelts were made of polyethylene terephthalate fibers with a thickness of 20–25 µm. The sorption capacity of the needlefelts of varying densities was determined as a function of the powder concentration in water. A mechanism for distributing powder particles in the needlefelts of varying densities is proposed. The model equation includes the amount of the wash powder removed from wastewater, as well as the initial concentration of the wash powder in water and the needlefelt density.

Key words

sorption capacity , surfactants , needlefelt

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UDC 628.162.1

Filatova E. G., Dudarev V. I., Syrykh Yu. S., Nguen Ngok An Tuan

Extraction of Iron Ions (II) from Aqueous Solutions with Carbonic Sorbents

SUMMARY

The absorbing capacity of carbonic sorbents of ИПИ-Т mark regarding iron ions (II) has been studied. Sorbents on the basis of carbonated polymer materials stable to aggressive media, have a developed specific surface area, inexpensive. Isotherms of adsorption under static conditions at temperature of 298 K have been obtained. The isotherm of adsorption is described satisfactorily by the Langmuir equation. Results of the study shows that carbonic sorbents of ИПИ-Т mark are able to sorb iron ions (II), in the process, a sorption capacity is 0,24 mole/g. The kinetics of the process has been studied, thermodynamic parameters of sorption have been determined. The sorption method of treatment with the use of sorbents of ИПИ-Т can be economically sound. Сarbonic sorbents are perspective for selective extraction of iron ions (II) from industrial wastewater.

Key words

natural and waste water , iron ions , carbonic sorbent , absorbing capacity , sorption capacity

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UDC 628.316.12

SHVETSOV V. N., MOROZOVA K. M., Smirnova I. I., Domnin K. V., Arkhipova Elena

Extraction of heavy metal ions from municipal effluent after biological treatment

Summary

The results of investigating the extraction of heavy metal ions from the municipal effluent after biological treatment with the use zeolites (clinoptilolite and Glint granulated sorbent) are presented. The zeolite sorption capacity under static and dynamic conditions was investigated. It was shown that only the use of clinoptilolite provided for the elimination of heavy metals to meet the standards for fishery water bodies. A procedure of designing filters with clinoptilolite for the removal of metals from municipal effluent after biological treatment was developed.

Key words

wastewater , sorption , sorption capacity , filtration , heavy metals , zeolites , clinoptilolite