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De Souza APN, Sánchez DR, Alzamora M, Colaço MV, de Souza MAV, De Gois JS, Senra JD, Carvalho NMF. Outstanding adsorption capacity of iron oxide synthesized with extract of açaí berry residue: kinetic, isotherm, and thermodynamic study for dye removal. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:109423-109437. [PMID: 37775630 DOI: 10.1007/s11356-023-29872-0] [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: 06/08/2023] [Accepted: 09/10/2023] [Indexed: 10/01/2023]
Abstract
Contamination of water by toxic dyes is a serious environmental problem. Adsorbents prepared by an environmentally safe route have stood out for application in pollutant removal. Herein, iron oxide-based nanomaterial composed of Fe(III)-OOH and Fe(II/III) bound to proanthocyanidins, with particles in the order of 20 nm, was prepared by green synthesis assisted by extract of açaí (Euterpe oleracea Mart.) berry seeds from an agro-industrial residue. The nanomaterial was applied in the adsorption of cationic dyes. Screening tests were carried out for methylene blue (MB), resulting in an outstanding maximum adsorption capacity of 531.8 mg g-1 at 343 K, pH 10, 180 min. The kinetics followed a pseudo-second-order model and the isotherm of Fritz-Schülnder provided the best fit. Thermodynamic data show an endothermic process with entropy increase, typical of chemisorption. The proposed mechanism is based on the multilayer formation over a heterogeneous adsorbent surface, with chemical and electrostatic interactions of MB with the iron oxide nanoparticles and with the proanthocyanidins. The high adsorption efficiency was attributed to the network formed by the polymeric proanthocyanidins that entangled and protected the iron oxide nanoparticles, which allowed the reuse of the nanomaterial for seven cycles without loss of adsorption efficiency.
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Affiliation(s)
- Ana Paula Nazar De Souza
- Instituto de Química, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Pavilhão Haroldo Lisboa da Cunha, IQ, Maracanã, Rio de Janeiro, RJ, 20550-013, Brazil
| | - Dalber R Sánchez
- Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/no, Gragoatá, Niterói, RJ, 24210-346, Brazil
| | - Mariella Alzamora
- Campus Duque de Caxias, Universidade Federal do Rio de Janeiro, Rodovia Washington Luiz, 19593, Santa Cruz da Serra, Duque de Caxias, RJ, 25240-005, Brazil
| | - Marcos Vinicius Colaço
- Instituto de Física, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Pavilhão João Lyra Filho, Maracanã, Rio de Janeiro, RJ, 20550-013, Brazil
| | - Marcelo Augusto Vieira de Souza
- Instituto de Química, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Pavilhão Haroldo Lisboa da Cunha, IQ, Maracanã, Rio de Janeiro, RJ, 20550-013, Brazil
| | - Jefferson Santos De Gois
- Instituto de Química, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Pavilhão Haroldo Lisboa da Cunha, IQ, Maracanã, Rio de Janeiro, RJ, 20550-013, Brazil
| | - Jaqueline Dias Senra
- Instituto de Química, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Pavilhão Haroldo Lisboa da Cunha, IQ, Maracanã, Rio de Janeiro, RJ, 20550-013, Brazil
| | - Nakédia M F Carvalho
- Instituto de Química, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Pavilhão Haroldo Lisboa da Cunha, IQ, Maracanã, Rio de Janeiro, RJ, 20550-013, Brazil.
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Xiong H, Shi K, Han J, Cui C, Liu Y, Zhang B. Synthesis of β-FeOOH/polyaniline heterogeneous catalyst for efficient photo-Fenton degradation of AOII dye. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:59366-59381. [PMID: 37004613 DOI: 10.1007/s11356-023-26582-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 03/17/2023] [Indexed: 05/10/2023]
Abstract
Discharge of the untreated dye-containing wastewaters will induce water source pollution and further harm aquatic organisms. In this study, the akaganéite/polyaniline catalyst (β-FeOOH/PANI, about 1.0 μm) could be successfully composed by polyaniline (PANI, (C6H7N)n, 200-300 nm) and akaganéite (β-FeOOH, FeO(OH)1-xClx, less than 200 nm), according to the identification and characterization results of XRD, Ramon, FTIR, XPS, SEAD, EDS, and FESEM (or HRTEM). Due to PANI providing more photogenerated electrons, the β-FeOOH/PANI composite (compared with β-FeOOH) in photo-Fenton system had the more highly catalytic degradation capacity to Acid Orange II (AOII) under an optimal condition (7.5 mmol/L of H2O2 oxidant, 40 mg/L of AOII, 0.2 g/L of catalyst dosage, and pH 4.0). The AOII degradation kinetics could be well fitted by pseudo-first-order model. In photo-Fenton catalytic process of AOII dye, the ∙OH and h+ were the main reaction substances. The AOII in solutions could be gradually mineralized into non-toxic inorganic H2O molecule and CO2. The β-FeOOH/PANI catalyst also had a good reusable ability of about 91.4% AOII degradation after 4 runs. These results can provide a reference for synthesis of catalyst used in photo-Fenton system and the applications in degradation removal of organic dye from wastewaters.
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Affiliation(s)
- Huixin Xiong
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, People's Republic of China.
| | - Kun Shi
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, People's Republic of China
| | - Jie Han
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, Jiangsu, People's Republic of China
| | - Can Cui
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, People's Republic of China
| | - Yang Liu
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, People's Republic of China
| | - Bailin Zhang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, People's Republic of China
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Monje DS, Mercado DF, Mesa GAP, Valencia GC. Carbon dots decorated magnetite nanocomposite obtained using yerba mate useful for remediation of textile wastewater through a photo-Fenton treatment: Ilex paraguariensis as a platform of environmental interest-part 2. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:3070-3087. [PMID: 35941506 DOI: 10.1007/s11356-022-22405-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 08/01/2022] [Indexed: 06/15/2023]
Abstract
Two carbon dots (CD) with diameters of 4.9 ± 1.5 and 4.1 ± 1.2 nm were successfully synthesized through an acid ablation route with HNO3 or H2SO4, respectively, using Ilex paraguariensis as raw material. The CD were used to produce magnetite-containing nanocomposites through two different routes: hydrothermal and in situ. A thorough characterization of the particles by transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), dynamic light scattering (DLS), Fourier transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS) indicates that all nanomaterials have spherical-like morphology with a core-shell structure. The composition of this structure depends on the route used: with the hydrothermal route, the shell is composed of the CD, but with the in situ process, the CD act as nucleation centers, and so the iron oxide domains are in the shell. Regarding the photocatalytic mechanism for the degradation of methyl orange, the interaction between the CD and the magnetite plays an important role in the photo-Fenton reaction at pH 6.2, in which ligand-to-metal charge transfer processes (LTMCT) allow Fe2+ regeneration. All materials (100 ppm) showed catalytic activity in the elimination of methyl orange (8.5 ppm), achieving discoloration of up to 98% under visible irradiation over 400 nm in 7 h. This opens very interesting possibilities for the use of agro-industrial residues for sustainable synthesis of catalytic nanomaterials, and the role of the interaction of iron-based catalysts with organic matter in heterogeneous Fenton-based processes.
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Affiliation(s)
- Dany S Monje
- Grupo de Investigación Aplicaciones en Fotoquímica (GIAFOT), Escuela de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Medellín, Calle 59ª 63-020 Autopista Norte, P.O. Box 3840, Medellín, Colombia
| | - D Fabio Mercado
- Grupo de Investigación Aplicaciones en Fotoquímica (GIAFOT), Escuela de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Medellín, Calle 59ª 63-020 Autopista Norte, P.O. Box 3840, Medellín, Colombia.
- LMGP, Grenoble INP, CNRS, University Grenoble Alpes, 38000, Grenoble, France.
| | - Gustavo A Peñuela Mesa
- Grupo de Diagnóstico Y Control de La Contaminación (GDCON), Escuela Ambiental, Facultad de Ingeniería, Universidad de Antioquia, Cl. 62 #52-59, Medellín, Colombia
| | - Gloria Cristina Valencia
- Grupo de Investigación Aplicaciones en Fotoquímica (GIAFOT), Escuela de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Medellín, Calle 59ª 63-020 Autopista Norte, P.O. Box 3840, Medellín, Colombia
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