Anionic Surfactant Adsorption on Activated Carbons Produced from Lignin and Modified with Cellulose Sulfoacetate

IF 1.4 4区化学 Q4 CHEMISTRY, PHYSICAL

Colloid Journal Pub Date : 2024-02-20 DOI:10.1134/S1061933X23601117

O. A. Kangina, M. G. Chernysheva, G. A. Badun, A. V. Lishai, N. G. Tsygankova, T. A. Savitskaya, D. D. Grinshpan

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Abstract

This work is devoted to studying the adsorption of sodium dodecyl sulfate (SDS) and sodium N-lauryl sarcosinate (NLS) on activated carbons produced from hydrolytic lignin using laboratory and pilot setups. Commercially available activated carbons produced by “Sorbent” Ltd. and SKT-3 are used for comparison. The surface of the activated carbons is modified (hydrophilized) by cellulose sulfoacetate (CSA) adsorption from aqueous solutions. Amounts of surfactants adsorbed on the activated carbon surface are determined from their radioactivity using tritium-labeled compounds. It has been found that the maximum adsorption of anionic surfactants is higher on activated carbons obtained from lignin. Adsorption values in the saturation region are 1.7 and 1.5 mmol/g for SDS and NLS on activated carbons obtained from lignin and 0.8 mmol/g for both surfactants adsorbed on commercial carbons. It has been shown that the preliminary application of CSA does not affect the maximum adsorption of NLS at its high concentrations; however, it reduces its adsorption in the initial region of the isotherm. Adsorption of CSA and its ability to be retained on the surface of the activated carbons is also studied. Tritium-labeled CSA has been used to show that the isotherm of its adsorption on activated carbon obtained from lignin is S-shaped beginning from a concentration of 0.5 g/L and reaches a maximum value of 25 mg/g. In the presence of NLS, the polymer is desorbed from the carbon surface by more than 50%.

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阴离子表面活性剂在由木质素制成并用磺基乙酸纤维素改性的活性炭上的吸附作用

摘要本研究利用实验室和中试装置研究了十二烷基硫酸钠（SDS）和 N-月桂酰肌氨酸钠（NLS）在由水解木质素生产的活性碳上的吸附情况。比较使用的是 "Sorbent "有限公司和 SKT-3 公司生产的市售活性碳。通过吸附水溶液中的磺基乙酸纤维素（CSA），对活性炭表面进行改性（亲水）。活性炭表面吸附的表面活性剂数量是通过氚标记化合物的放射性来测定的。研究发现，木质素制成的活性炭对阴离子表面活性剂的最大吸附量较高。SDS 和 NLS 在木质素制成的活性碳上的饱和吸附值分别为 1.7 和 1.5 mmol/g，而这两种表面活性剂在商用碳上的吸附值均为 0.8 mmol/g。研究表明，初步使用 CSA 不会影响 NLS 在高浓度下的最大吸附量，但会降低其在等温线初始区域的吸附量。此外，还研究了 CSA 的吸附及其在活性碳表面的保留能力。氚标记的 CSA 在木质素活性炭上的吸附等温线从 0.5 克/升的浓度开始呈 S 型，最大值为 25 毫克/克。在 NLS 存在的情况下，聚合物从碳表面解吸的比例超过 50%。

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来源期刊

Colloid Journal 化学-物理化学

CiteScore

2.20

自引率

18.20%

发文量

审稿时长

6-12 weeks

期刊介绍： Colloid Journal (Kolloidnyi Zhurnal) is the only journal in Russia that publishes the results of research in the area of chemical science dealing with the disperse state of matter and surface phenomena in disperse systems. The journal covers experimental and theoretical works on a great variety of colloid and surface phenomena: the structure and properties of interfaces; adsorption phenomena and structure of adsorption layers of surfactants; capillary phenomena; wetting films; wetting and spreading; and detergency. The formation of colloid systems, their molecular-kinetic and optical properties, surface forces, interaction of colloidal particles, stabilization, and criteria of stability loss of different disperse systems (lyosols and aerosols, suspensions, emulsions, foams, and micellar systems) are also topics of the journal. Colloid Journal also includes the phenomena of electro- and diffusiophoresis, electro- and thermoosmosis, and capillary and reverse osmosis, i.e., phenomena dealing with the existence of diffusion layers of molecules and ions in the vicinity of the interface.