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<b>Abstract</b>— <p>The paper addresses the problem of wastewater treatment from anionic synthetic surfactants. Sodium lauryl sulfate was studied as the most commonly encountered surfactant contained in wastewater from industrial enterprises. It is established that surface tension at the air–solution interface decreases with increasing surfactant concentration. Special attention is given to sorption methods for surfactant removal. A waste product from water treatment facilities, namely, sludge from clarifiers of thermal power plants is proposed as a sorbent material. Most optimal binders were chosen to impart hydrophobicity and buoyancy to the waste, which are necessary for the removal of this type of contaminants. Sorption isotherms for the developed materials were obtained, classified as type I according to the Brunauer–Emmett–Teller (BET) classification, characteristic of microporous materials. Based on the obtained isotherms, the applicability of the Langmuir and Freundlich models was evaluated by calculating their parameters and constants. Mathematical simulation employing the Dubinin–Radushkevich equation enabled obtaining free energy of adsorption for the sorbent materials (equal to 6.6519 and 6.9001 kJ/mol), indicating the physical nature of adsorption. The developed sorbent materials are applicable for local wastewater treatment from anionic synthetic surfactants at enterprises of the chemical, mechanical engineering, oil and gas, and other industries.</p>

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Extraction of Surfactants Using Sorption Materials Based on Energy Production Waste

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • R. Ya. Iskhakova,
  • A. G. Laptev

摘要

Abstract—

The paper addresses the problem of wastewater treatment from anionic synthetic surfactants. Sodium lauryl sulfate was studied as the most commonly encountered surfactant contained in wastewater from industrial enterprises. It is established that surface tension at the air–solution interface decreases with increasing surfactant concentration. Special attention is given to sorption methods for surfactant removal. A waste product from water treatment facilities, namely, sludge from clarifiers of thermal power plants is proposed as a sorbent material. Most optimal binders were chosen to impart hydrophobicity and buoyancy to the waste, which are necessary for the removal of this type of contaminants. Sorption isotherms for the developed materials were obtained, classified as type I according to the Brunauer–Emmett–Teller (BET) classification, characteristic of microporous materials. Based on the obtained isotherms, the applicability of the Langmuir and Freundlich models was evaluated by calculating their parameters and constants. Mathematical simulation employing the Dubinin–Radushkevich equation enabled obtaining free energy of adsorption for the sorbent materials (equal to 6.6519 and 6.9001 kJ/mol), indicating the physical nature of adsorption. The developed sorbent materials are applicable for local wastewater treatment from anionic synthetic surfactants at enterprises of the chemical, mechanical engineering, oil and gas, and other industries.