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Santana RMDR, Napoleão DC, Rodriguez-Diaz JM, Gomes RKDM, Silva MG, Lima VMED, Melo Neto AAD, Vinhas GM, Duarte MMMB. Efficient microbial cellulose/Fe 3O 4 nanocomposite for photocatalytic degradation by advanced oxidation process of textile dyes. CHEMOSPHERE 2023; 326:138453. [PMID: 36958497 DOI: 10.1016/j.chemosphere.2023.138453] [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: 12/04/2022] [Revised: 02/19/2023] [Accepted: 03/17/2023] [Indexed: 06/18/2023]
Abstract
Fenton-type advanced oxidative processes (AOP) have been employed to treat textile dyes in aqueous solution and industrial effluent. The work focused on assisting the limitations still presented by the Fenton process regarding the use of suspended iron catalysts. Soon, a nanocomposite of bacterial cellulose (BC) and magnetite (Fe3O4) was developed. It has proven to be superior to those available in the literature, exhibiting purely catalytic properties and high reusability. Its successful production was verified through analytical characterization, while its catalytic potential was investigated in the treatment of different textile matrices. In initial tests, the photo-Fenton process irradiated and catalyzed by sunlight and BC/Fe3O4 discolored 92.19% of an aqueous mixture of four textile dyes. To improve the efficiency, the design of experiments technique evaluated the influence of the variables pH, [H2O2], and the number of BC/Fe3O4 membranes. 99.82% of degradation was obtained under optimized conditions using pH 5, 150 mg L-1 of H2O2, and 11 composite membranes. Reaction kinetics followed a pseudo-first-order model, effectively reducing the organic matter (COD = 83.24% and BOD = 88.13%). The composite showed low iron leaching (1.60 ± 0.08 mg L-1) and high stability. It was recovered and reused for 15 consecutive cycles, keeping the treatment efficiency at over 90%. As for the industrial wastewater, the photo-Fenton/sunlight/BC/Fe3O4 system showed better results when combined with the physical-chemical coagulation/flocculation process previously used in the industry's WWTP. Together they reduced COD by 77.77%, also meeting the color standards (DFZ scale) for the wavelengths of 476 nm (<3 m-1), 525 nm (<5 m-1), and 620 nm (<7 m-1). Thus, the results obtained demonstrated that employing the BC/Fe3O4 composite as an iron catalyst is a suitable alternative to materials employed in suspension. This is mainly due to the high catalytic activity and power of reuse, which will reduce treatment costs.
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Affiliation(s)
| | - Daniella Carla Napoleão
- Chemical Engineering Department, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil.
| | - Joan Manuel Rodriguez-Diaz
- Departamento de Procesos Químicos, Facultad de Ciencias Matemáticas, Físicas y Químicas, Universidad Técnica de Manabí, Portoviejo, Manabí, 130104, Ecuador; Laboratorio de Análisis Químicos y Biotecnológicos, Instituto de Investigación, Universidad Técnica de Manabí, Portoviejo, Manabí, 130104, Ecuador.
| | | | - Marina Gomes Silva
- Chemical Engineering Department, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil.
| | | | | | - Glória Maria Vinhas
- Chemical Engineering Department, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil.
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Barik K, Prusti P, Soren S, Meikap B, Biswal S. Mineralogical investigation on preheating studies of high LOI iron ore pellet. POWDER TECHNOL 2023. [DOI: 10.1016/j.powtec.2023.118315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Mechanism of magnetite iron ore concentrate morphology affecting the pellet induration process. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Barik K, Prusti P, Soren S, Meikap B, Biswal S. Analysis of iron ore pellets properties concerning raw material mineralogy for effective utilization of mining waste. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117259] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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