TY - JOUR

T1 - Colloid-chemical properties of surfactant–nitric acid–water systems

AU - Danilin, Lev

AU - Lugovitskaya, Tatyana

AU - Kolmachikhina, Elvira

AU - Rogozhnikov, Denis

N1 - The study was carried out within the framework of the Russian Science Foundation (Project No. 22-79-10290), https://www.rscf.ru/project/22-79-10290/ The analytical studies were carried out with financial support of the State Task of the Russian Federation under Grant No. 075-03-2021-051/5 (FEUZ-2021-0017). 5 of 6 DOI: 10.15826/chimtech.2023.10.4.08

PY - 2023

Y1 - 2023

N2 - The behavior of the surfactants Tween 80, SaS and alkyl betaine in aqueous and nitric acid environments as promising additives for nitrate leaching of hard-to-process ore concentrates of non-ferrous metals was studied. The influence of surfactant concentration (0.04–1.28 g/dm3 ), nitric acid concentration (0.1–10 g/dm3 ) and temperature (295–343 K) on the surface tension, critical micelle concentration (CMC), pH and optical density of aqueous surfactant solutions and surfactant–HNO3–H2O systems was found. The critical micelle concentration of the surfactants used was estimated. A positive effect of nitric acid on the surface activity of surfactants was discovered, which manifests itself in a decrease in both the CMC and the surface tension at the liquid–gas interface. The values of surface activity and Gibbs energy of surfactant micelle formation in aqueous and nitric acid media were calculated. Associative processes in the solutions and compositions were confirmed by measuring the optical density of the systems under study. © 2023, the Authors. This article is published in open access under the terms and conditions of the Creative Commons Attribution (CC BY) license.

AB - The behavior of the surfactants Tween 80, SaS and alkyl betaine in aqueous and nitric acid environments as promising additives for nitrate leaching of hard-to-process ore concentrates of non-ferrous metals was studied. The influence of surfactant concentration (0.04–1.28 g/dm3 ), nitric acid concentration (0.1–10 g/dm3 ) and temperature (295–343 K) on the surface tension, critical micelle concentration (CMC), pH and optical density of aqueous surfactant solutions and surfactant–HNO3–H2O systems was found. The critical micelle concentration of the surfactants used was estimated. A positive effect of nitric acid on the surface activity of surfactants was discovered, which manifests itself in a decrease in both the CMC and the surface tension at the liquid–gas interface. The values of surface activity and Gibbs energy of surfactant micelle formation in aqueous and nitric acid media were calculated. Associative processes in the solutions and compositions were confirmed by measuring the optical density of the systems under study. © 2023, the Authors. This article is published in open access under the terms and conditions of the Creative Commons Attribution (CC BY) license.

UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85180444555

UR - https://elibrary.ru/item.asp?id=60040548

U2 - 10.15826/chimtech.2023.10.4.08

DO - 10.15826/chimtech.2023.10.4.08

M3 - Article

VL - 10

SP - 7121

JO - Chimica Techno Acta

JF - Chimica Techno Acta

SN - 2409-5613

IS - 4

ER -