Physical and Chemical Regularities of Phosphorus and Beryllium Recovery by the Sorbents Based on Acrylic Fiber Impregnated by Iron Hydroxide (III)

Abstract

The paper investigates the physicochemical regularities (kinetics and isotherm) of phosphorus and beryllium recovery by sorbents based on polyacrylonitrile (PAN) fiber and Fe(OH)3 obtained by various methods: PAN or pre-hydrolyzed PAN with precipitation of FeCl3 with ammonia, using ready-made or electrochemically generated Na2FeO4, pre-hydrolyzed PAN treated with an alkaline solution of Na2FeO4, as well as their comparison with granular aluminum oxide. The Langmuir, Freudlich and Dubinin–Radushkevich models show high performance of materials for sorption of stable P and Be used as tracers for the release of 7Be, 32P, and 33P from seawater. The obtained kinetic data are processed using kinetic models of intraparticle diffusion and the pseudo-first-order, pseudo-second-order, and Elovich models. Optimal conditions for obtaining sorbents are established, namely, the effect of NaOH concentration at the stages of preparation on the properties of sorbents based on the PAN fiber and Fe(OH)3 obtained by various methods.

Special Issue on “Resource Recovery and Harmless Treatment Processes for Industrial Organic Pollutants”

“…There are also many inorganic polluted wastewaters. Nikolay and co-workers [7] investigated the physicochemical regularities (kinetics and isotherm) of phosphorus and beryllium recovery by sorbents based on polyacrylonitrile (PAN) fiber and Fe(OH) 3 obtained via various methods. They found thar the adsorption of 7 Be, 32 P, and 33 P from seawater matched well with Langmuir, Freudlich and Dubinin-Radushkevich models, respectively.…”

“…Nikolay and co-workers [7] investigated the physicochemical regularities (kinetics and isotherm) of phosphorus and beryllium recovery by sorbents based on polyacrylonitrile (PAN) fiber and Fe(OH) 3 obtained via various methods. They found thar the adsorption of 7 Be, 32 P, and 33 P from seawater matched well with Langmuir, Freudlich and Dubinin-Radushkevich models, respectively. They also obtained the kinetic data and fitted them using kinetic models of intraparticle diffusion and the pseudo-first-order, pseudo-second-order, and Elovich models.…”

Bio-Based Polyurethane Foams for the Removal of Petroleum-Derived Pollutants: Sorption in Batch and in Continuous-Flow

“…There are different methodologies that have been introduced to decontaminate water sources, and they can be divided into three macro-areas: chemical, physical and biological [ 11 , 12 , 13 ]. In this paper, we focused our attention on sorption and the chemical–physical parameters that affect this methodology [ 14 ]. Sorbent can be divided into two categories: synthetic and natural [ 15 , 16 ].…”

7Be Recovery from Seawater by Sorbents of Various Types

“…Previously, we obtained several sorbents based on PAN (polyacrylonitrile) fiber and iron(III) hydroxide for the sorption of natural and cosmogenic radionuclides from seawater [10,11]. Their comprehensive study was carried out, the distribution coefficients of beryllium, the dynamic (DEC) and total dynamic exchange capacities (TDEC) of sorbents for beryllium were determined, output sorption curves were constructed [12], and the sorption kinetics and isotherm were studied [13]. The obtained sorbents were tested for radionuclides sorption from seawater [12].…”

“…The obtained sorbents were tested for radionuclides sorption from seawater [12]. In addition, the parameters of beryllium sorption by obtained sorbents based on PAN fiber and iron(III) hydroxide were compared with aluminum oxide [12,13]-the first material proposed for 7 Be recovery [9].…”