Adsorption recovery of amines from water solutions
Адсорбционное извлечение аминов из водных растворов
Targanov I.E. Gakiev A.L. Kadirbekov A.A. Troshkina I.D. Bektenov N.А. Cherednichenko A.G.
2024Publishing House O-Kratkoe
Theoretical and Applied Ecology
2024Issue 291 - 100 pp.
Aquatic biological resources are an important part of the ecosystems of our planet, since they are involved in economic turnover as a source of food. The composition of water, including waste water from enterprises, has a direct impact on the state of aquatic biological resources. To extract and concentrate metals from solutions, hydrometallurgical processes are used – extraction and sorption. Their implementation is possible with the use of special substances – extractants and in a number of processes – sorption materials (Solvent Impregnated Resins (SIR’s) and Levextrel’s) with a mobile phase of the extractant, combining the properties of sorbents and extractants. Despite the advantages of the latter, such as high kinetic parameters, lack of swelling and high values of mechanical strength, they are characterized by the disadvantages of extraction methods – the entrainment of the extractant into the aqueous phase in dissolved and emulsion forms. Under static conditions, the possibility of purification of aqueous solutions containing primary or tertiary amine by adsorption on carbon materials (activated carbon NWC, carbon NWC-T modified with carbon nanotubes, CS-PTFE modified with polytetrafluoroethylene), as well as on styrene-divinylbenzene nonionic copolymer Porolas-T and a natural shell rock adsorbent was studied. The kinetics of adsorption of аmines Primene-JMT and TOA from aqueous solutions by these adsorbents has been studied by the method of a limited volume of solution. Of the known pseudo-first order, pseudo-second order and Elovich models, the pseudo-second order model describes kinetic data more adequately (R2>0.99). The values of the distribution coefficients and the rate constants of adsorption of Primene-JMT and TOA are determined. A block diagram of adsorption purification of aqueous solutions from amines is proposed, the implementation of which will reduce the toxicity of waste solutions and return some of the expensive extractant to circulation.
adsorption , amines , block diagram , coal , distribution coefficient , modified coal , shell rock , synthetic polymer sorbent , velocity constant
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Mendeleev University of Chemical Technology of Russia, 9, Miusskaya Sq., Moscow, 125047, Russian Federation
South Kazakhstan University Named After. M. Auezova, 5, Tauke Khana St., Shymkent, 160012, Kazakhstan
Abai Kazakh National Pedagogical University, 13, Dostyk Av., Almaty, 050010, Kazakhstan
Peoples’ Friendship University of Russia (RUDN University), 6, Miklukho-Maclay St., Moscow, 117198, Russian Federation
Mendeleev University of Chemical Technology of Russia
South Kazakhstan University Named After. M. Auezova
Abai Kazakh National Pedagogical University
Peoples’ Friendship University of Russia (RUDN University)
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