Study of mechanism of p-dinitrobenzene adsorption by modified bentonites when water purification in static conditions

Atamanova, O. V.; Тихомирова, Е. И.; Istrashkina, M.V.; Podoksenov, A. A.

doi:10.23968/2305-3488.2020.25.2.3-11

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“…Clays are modified in various ways and molded to the form of free-flowing granular consistency. We previously [4,5] studied the adsorption properties of bentonites of several modifications with respect to nitro-, amino-, and hydroxy derivatives of benzene. The results obtained allowed us to assume that the sorption activity of modified bentonites will ensure the extraction of not only aromatic compounds, but also other pollutants from water by 80-92% [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Purification of water environments from heavy metals ions pollution

Atamanova

Тихомирова

Podoksenov

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Modern methods for extracting heavy metal ions from industrial wastewater are quite diverse. The purpose of the study was to develop and justify new technologies for purification of aqueous media, including adsorption purification, from heavy metal ions (by the example of Ni2+ and Cd2+ ions). Laboratory studies have established that the degree of adsorption extraction of Ni2+ ions by the sorption material from bentonite modified with carbon nanotubes and fired at a temperature of 550 °C increases by 13-14 % due to its activation with 18 % HCl solution and 38 % CaCl2 solution, and the degree of adsorption extraction of Cd2+ ions with this activation of the sorbent, it increases by 16-17 %. A technological scheme of a water purification station is proposed, which includes highly efficient adsorption filters with sorption material from bentonite of the specified modification and acid-salt activation.

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