Kinetic of the dyes adsorption on a polyhydroquinone/graphene nanocomposite under dynamic conditions. (November 2019)

• Record Type: Journal Article
• Authors: Mkrtchyan, E; Neskoromnaya, E; Burakova, I; Kurnosov, D; Burakov, A; Tkachev, A; Ali, I
• Is Part Of: IOP conference series. Volume 693(2019)
• Publication Date: 2019-11
• Subjects: Materials science -- Periodicals; 620.1105
• DOI: 10.1088/1757-899X/693/1/012041
• Languages: English
• ISSNs: 1757-8981

Abstract

Abstract: Conducting adsorption experiments in a dynamic mode makes it possible to simulate process parameters as close to real conditions as possible. In the present work, the kinetics of the adsorption of some organic dyes (methylene blue, alizarin red S, and malachite green) on a novel polyhydroquinone/graphene nanocomposite, developed by the authors, were studied.It was established that the equilibrium of the adsorption system is achieved within 40, 120 and 57 min for methylene blue, alizarin red S and malachite green, respectively. Data processing using kinetic models showed that chemical interactions take place between the dye molecules and the active sites of the adsorbent during the adsorption. Besides, the contribution of the diffusion through the film on the adsorbent surface was also marked. The maximum adsorption capacity of the adsorbent was found to increase in the following sequence: malachite green (688.1 mg g -1 ) < methylene blue (2.610 mg g -1 ) < alizarin red S (2.923 mg g -1 ).