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Fantinel LA, Bonetto LR, Baldasso C, Poletto M. Evaluation of the use of adsorbents based on graphene oxide and cellulose for Cr(VI) adsorption. CHEM ENG COMMUN 2022. [DOI: 10.1080/00986445.2022.2132152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Lucas Antônio Fantinel
- Postgraduate Program in Engineering of Processes and Technologies (PGEPROTEC), Exact Sciences and Engineering, University of Caxias do Sul (UCS), Caxias do Sul, Brazil
| | - Luis Rafael Bonetto
- Chemical Engineering, Exact Sciences, and Engineering, University of Caxias do Sul (UCS), Caxias do Sul, Brazil
| | - Camila Baldasso
- Postgraduate Program in Engineering of Processes and Technologies (PGEPROTEC), Exact Sciences and Engineering, University of Caxias do Sul (UCS), Caxias do Sul, Brazil
| | - Matheus Poletto
- Postgraduate Program in Engineering of Processes and Technologies (PGEPROTEC), Exact Sciences and Engineering, University of Caxias do Sul (UCS), Caxias do Sul, Brazil
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Vanadium(V) Removal from Aqueous Solutions and Real Wastewaters onto Anion Exchangers and Lewatit AF5. Molecules 2022; 27:molecules27175432. [PMID: 36080204 PMCID: PMC9457782 DOI: 10.3390/molecules27175432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/20/2022] [Accepted: 08/22/2022] [Indexed: 11/17/2022] Open
Abstract
Adsorption abilities of weakly (Purolite A830), weakly basic/chelating (Purolite S984), and strongly basic (Lewatit MonoPlus SR7, Purolite A400TL, Dowex PSR2, Dowex PSR3) ion exchange resins of different functional groups and microporous Lewatit AF5 without functional groups towards vanadium(V) ions were studied in batch and column systems. In the batch system, the influence of the sorbent mass (0.01–0.1 g), pH (2–10), the phase contact time (1–1440 min),and the initial concentration (5–2000 mg/L) were studied, whereas in the column system, the initial concentrations (50, 100, and 200 mg/L) with the same bed volume and flow rate (0.4 mL/min) were studied. Desorption agents HCl and NaOH of 0.1–1 mol/L concentration were used for loaded sorbent regeneration. The pseudo-first order, pseudo-second order and intraparticle diffusion kinetic models as well as the Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich isotherm models were used to describe kinetic and equilibrium data to acquire improved knowledge on the adsorption mechanism. The desorption efficiency was the largest using 0.5 mol/L NaOH for all sorbents under discussion. Purolite S984, Purolite A830, and Purolite A400TL, especially Purolite S984, are characterized by the best removal ability towards vanadium(V) from both model and real wastewater.
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Preigschadt IA, Bevilacqua RC, Netto MS, Georgin J, Franco DSP, Mallmann ES, Pinto D, Foletto EL, Dotto GL. Optimization of ketoprofen adsorption from aqueous solutions and simulated effluents using H 2SO 4 activated Campomanesia guazumifolia bark. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:2122-2135. [PMID: 34363168 DOI: 10.1007/s11356-021-15668-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 07/22/2021] [Indexed: 06/13/2023]
Abstract
This study used the bark of the forest species Campomanesia guazumifolia modified with H2SO4 to absorb the anti-inflammatory ketoprofen from aqueous solutions. FTIR spectra confirmed that the main bands remained after the chemical treatment, with the appearance of two new bands related to the elongation of the carbonyl group present in hemicellulose. Micrographs confirmed that the surface started to contain a new textural shape after acid activation, having new pores and cavities. The drug adsorption's optimum conditions were obtained by response surface methodology (RSM). The adsorption was favored at acidic pH (2). The dosage of 1 g L-1 was considered ideal, obtaining good indications of removal and capacity. The Elovich model very well represented the kinetic curves. The isotherm studies indicated that the increase in temperature negatively affected the adsorption of ketoprofen. A maximum adsorption capacity of 158.3 mg g-1 was obtained at the lower temperature of 298 K. Langmuir was the best-fit isotherm. Thermodynamic parameters confirmed the exothermic nature of the system (ΔH0 = -8.78 kJ mol-1). In treating a simulated effluent containing different drugs and salts, the removal values were 35, 50, and 80% at 15, 30, and 180 min, respectively. Therefore, the development of adsorbent from the bark of Campomanesia guazumifolia treated with H2SO4 represents a remarkable alternative for use in effluent treatment containing ketoprofen.
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Affiliation(s)
- Isadora A Preigschadt
- Chemical Engineering Department, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
| | - Raíssa C Bevilacqua
- Chemical Engineering Department, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
| | - Matias S Netto
- Chemical Engineering Department, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
| | - Jordana Georgin
- Graduate Program in Civil Engineering, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
| | - Dison S P Franco
- Chemical Engineering Department, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
| | - Evandro S Mallmann
- Chemical Engineering Department, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
| | - Diana Pinto
- Department of Civil and Environmental, Universidad De La Costa, Calle 58 #55-66, 080002, Barranquilla, Atlántico, Colombia.
| | - Edson L Foletto
- Chemical Engineering Department, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
| | - Guilherme L Dotto
- Chemical Engineering Department, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil.
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Men J, Shi H, Dong C, Yang Y, Han Y, Wang R, Zhang Y, Zhao T, Li J. Preparation of poly(sodium 4-styrene sulfonate) grafted magnetic chitosan microspheres for adsorption of cationic dyes. Int J Biol Macromol 2021; 181:810-823. [PMID: 33865891 DOI: 10.1016/j.ijbiomac.2021.04.079] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 04/11/2021] [Accepted: 04/13/2021] [Indexed: 12/23/2022]
Abstract
A novel adsorbent with high adsorption capacity to remove cationic dyes was synthesized. Sodium 4-styrene sulfonate (SSS) was grafted polymerization on the surface of magnetic chitosan microspheres via -NH2/S2O82- surface initiating system, obtaining MCS-g-PSSS microspheres. The grafted microsphere was characterized by Fourier transforms infrared spectroscopy, X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, vibration sample magnetometer and the Brunauer-Emmett-Teller. Cationic dyes were adsorbed by MCS-g-PSSS and methylene blue(MB) was acted as a typical example. The adsorption performance was explored by varying experimental conditions. The results showed the maximal adsorption capacity was 989 mg/g at pH 1 at 25 °C. The pseudo-second order model was found to be applicable for the adsorption kinetics. The adsorption capacity increased with rising temperature and it decreased owing to adding of ions. The adsorption isotherms were the best fitted by Langmuir. MCS-g-PSSS for MB showed high adsorption capacity due to the strong electrostatic interactions and π-π stacking, which was explained by FTIR and XPS and was verified by DFT calculations. The degree of adsorption spontaneity increased with rising the temperature. The grafted MCS-g-PSSS microspheres had high adsorption capacity for various kinds of cationic dyes and excellent for remove MB in the aqueous solution.
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Affiliation(s)
- Jiying Men
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, PR China.
| | - Hongxing Shi
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, PR China
| | - Chengya Dong
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, PR China
| | - Yuanyuan Yang
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, PR China
| | - Yuanrui Han
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, PR China
| | - Ruixin Wang
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, PR China
| | - Yiqing Zhang
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, PR China
| | - Ting Zhao
- Shanxi Xinhua Chemical Co., Ltd., Taiyuan 030051, PR China
| | - Jun Li
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, PR China.
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Adamczuk A, Sofinska-Chmiel W, Jozefaciuk G. Arsenate Adsorption on Fly Ash, Chitosan and Their Composites and Its Relations with Surface, Charge and Pore Properties of the Sorbents. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E5381. [PMID: 33256262 PMCID: PMC7731211 DOI: 10.3390/ma13235381] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/17/2020] [Accepted: 11/25/2020] [Indexed: 11/22/2022]
Abstract
One of the ways to recycle millions of tons of fly ash and chitin wastes produced yearly is their utilization as low-cost sorbents, mainly for heavy metal cations and organic substances. To improve their sorption efficiency, fly ashes have been thermally activated or modified by chitosan. We aimed to deeply characterize the physicochemical properties of such sorbents to reveal the usefulness of modification procedures and their effect on As(V) adsorption. Using low temperature nitrogen adsorption, scanning electron microscopy, mercury intrusion porosimetry, potentiometric titration and adsorption isotherms of As(V) anions, surface, pore, charge and anion adsorption parameters of fly ash activated at various temperatures, chitosan, and fly ash modified by chitosan were determined. Arsenate adsorption equilibrium (Langmuir model), kinetics (pseudo-second order model) and thermodynamics on the obtained materials were studied. Neither temperature activation nor chitosan modifications of fly ash were necessary and profitable for improving physicochemical properties and As(V) adsorption efficiency of fly ash. Practically, the physicochemical parameters of the sorbents were not related to their anion adsorption parameters.
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Affiliation(s)
- Agnieszka Adamczuk
- Institute of Agrophysics PAS, Doswiadczalna 4 Str., 20-290 Lublin, Poland;
| | - Weronika Sofinska-Chmiel
- Analytical Laboratory, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie Sklodowska University, Maria Curie Sklodowska Sq. 3, 20-031 Lublin, Poland;
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