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Uttam Pandit VR, Parshuram Jadhav GK, Sakharam Jawale VM, Dubepatil R, Gurao R, Late DJ. Synthesis and characterization of micro-/nano-α-Fe 2O 3 for photocatalytic dye degradation. RSC Adv 2024; 14:29099-29105. [PMID: 39282071 PMCID: PMC11393813 DOI: 10.1039/d4ra04575k] [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: 06/22/2024] [Accepted: 08/29/2024] [Indexed: 09/18/2024] Open
Abstract
Photocatalytic activity using micro-/nano-α-Fe2O3 on a large scale was carried out using a sol-gel autocombustion method. A degradation time of 60 min was noted for 50 mg of the catalyst. Post characterization, this catalyst system showed a degradation of about 53% (rate = 2.60 × 10-3 min-1) and 17% (rate = 1.38 × 10-2 min-1) under sunlight and up to 45% (rate = 1.13 × 10-3 min-1) and 7% (rate = 1.20 × 10-2 min-1) under a 400 W UV lamp for rhodamine 6G (R6G) and crystal violet (CV), respectively. Sunlight has a broad spectrum of light; it greatly accelerates the degradation process and creates ideal conditions for the reaction to occur. The rate of photocatalytic dye degradation of α-Fe2O3 without Fenton's reagent was found to be 7.84 × 10-3 min-1 in the presence of external air provided (in the photocatalytic setup) through a bubbler and 3.23 × 10-3 min-1 in the absence of the bubbler.
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Affiliation(s)
| | | | | | | | - Rajendra Gurao
- Department of Chemistry, The PGK Mandals Haribhai V. Desai College Pune-411002 India
| | - Dattatray J Late
- Materials Science and Technology Research Group, Brane Enterprises Private Limited Hyderabad 500081 India
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Khatamian M, Derakhshan SK, Nami SH, Fazli-Shokouhi S. Nitrate removal study of synthesized nano γ-alumina and magnetite-alumina nanocomposite adsorbents prepared by various methods and precursors. Sci Rep 2024; 14:7673. [PMID: 38561453 PMCID: PMC10984990 DOI: 10.1038/s41598-024-58459-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 03/29/2024] [Indexed: 04/04/2024] Open
Abstract
The challenges in water treatment include the need for efficient removal of pollutants like nitrate, which poses significant environmental and health risks. Alumina's significance lies in its proven effectiveness as an adsorbent for nitrate removal due to its high surface area and affinity for nitrate ions. This study delves into the synthesis of differen nano-sized γ-alumina (γA1-5) employing diverse precursors and methods, including nepheline syenite, lime, aluminum hydroxide, precipitation, and hydrothermal processes at varying reaction times. Simultaneously, magnetite (Fe3O4) nanoparticles and magnetite/γ-alumina nanocomposites (Fn/γA5) were synthesized using the co-precipitation method with varying weight ratios (n). Our primary objective was to optimize γ-alumina synthesis by comparing multiple methods, shedding light on the influence of different precursors and sources. Hence, a comprehensive adsorption study was conducted to assess the materials' efficacy in nitrate removal. This study fills gaps in the literature, providing a novel perspective through the simultaneous assessment of magnetite/alumina nanocomposites and pure alumina performance. Structural and morphological properties were studied employing XRD, FT-IR, FESEM, EDX, XRD, and VSM techniques. The conducted experiments for γA5, F5/γA5, and F10/γA5 nanocomposites showcased the optimum pH of 5 and contact time of 45 min for all samples. The influence of nitrate's initial concentration on the removal percentage was investigated with initial concentrations of 10 ppm, 50 ppm, and 100 ppm. γA5, F5/γA5 and F10/γA5 nanocomposites had 17.3%, 55%, and 70% at 10 ppm, 18%, 55.16%, and 74% at 50 ppm, and 8.6%, 53.1%, and 63%, respectively. The results highlighted that F10/γA5 can be used as a remarkable adsorbent for wastewater treatment purposes.
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Affiliation(s)
- Maasoumeh Khatamian
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, 5166616471, Iran.
| | | | - Shamin Hosseini Nami
- School of Chemical, Biological, and Materials Engineering, The University of Oklahoma, Norman, OK, 73019, USA
| | - Sara Fazli-Shokouhi
- Faculty of Materials Engineering, Sahand University of Technology, Tabriz, 513351996, Iran
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Jalaie A, Afshaar A, Mousavi SB, Heidari M. Investigation of the Release Rate of Biocide and Corrosion Resistance of Vinyl-, Acrylic-, and Epoxy-Based Antifouling Paints on Steel in Marine Infrastructures. Polymers (Basel) 2023; 15:3948. [PMID: 37835996 PMCID: PMC10575080 DOI: 10.3390/polym15193948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 09/21/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023] Open
Abstract
This study comprehensively assesses the release rate of biocides, corrosion effects related to antifouling, and the physical properties of different paint types. Tests were conducted to measure thickness, viscosity, hardness, bending, adhesion, gloss, impact resistance, abrasion resistance, scratch resistance, polarization, and salt spray. The paints evaluated include resin-based, acrylic-based, epoxy-based, and vinyl-based formulations. The study investigates the influence of biocide content, biocide particle size, and immersion time on release rate using a lab-scale setup. Results showed that acrylic-based paints had a higher biocide release rate due to faster hydrolysis, while smaller biocide particle sizes led to higher release rates in resin-based paints. Optimal total biocide contents were determined to be 30% for acrylic-based, 60% for epoxy-based, and 50% for vinyl-based paints. Antifouling corrosion analysis demonstrated that sample with an optimal release rate effectively prevent algae growth and fouling. Acrylic-based paint with 30 wt.% biocide content exhibited superior adhesion with a dolly separation force of 4.12 MPa. Evaluating the impact of synthesized polyaniline on 30 wt.% epoxy-based paint, a sample coated with 10 wt.% polyaniline represented a low corrosion rate of 0.35 µm/year and a high impedance value of approximately 37,000 Ohm·cm-2.
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Affiliation(s)
- Adel Jalaie
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran 1458889694, Iran
| | - Abdolah Afshaar
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran 1458889694, Iran
| | - Seyed Borhan Mousavi
- J. Mike Walker ‘66 Mechanical Engineering Department, Texas A&M University, College Station, TX 77843, USA
| | - Mohammad Heidari
- Faculty of Chemical & Petroleum Engineering, University of Tabriz, Tabriz 5166616471, Iran
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Khatamian M, Afshar No N, Hosseini Nami S, Fazli-Shokouhi S. Synthesis and characterization of zeolite A, Fe3O4/zeolite A, and Fe2O3/zeolite A nanocomposites and investigation of their arsenic removal performance. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2023. [DOI: 10.1007/s13738-023-02787-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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Hosseini Nami S, Mousavi SB. Nitrate Removal Performance of Different Granular Adsorbents Using a Novel Fe-Exchanged Nanoporous Clinoptilolite. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- Shamin Hosseini Nami
- School of Chemical, Biological and Materials Engineering, The University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Seyed Borhan Mousavi
- J. Mike Walker ’66 Mechanical Engineering Department, Texas A&M University, College Station, Texas 77843, United States
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Naghash‐Hamed S, Arsalani N, Mousavi SB. The Catalytic Reduction of Nitroanilines Using Synthesized CuFe 2 O 4 Nanoparticles in an Aqueous Medium. ChemistryOpen 2022; 11:e202200156. [PMID: 36328769 PMCID: PMC9633289 DOI: 10.1002/open.202200156] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 09/23/2022] [Indexed: 11/06/2022] Open
Abstract
The primary objective of this research is to investigate the reduction of 4-nitroaniline (4-NA) and 2-nitroaniline (2-NA) using synthesized copper ferrite nanoparticles (NPs) via facile one-step hydrothermal method as a heterogeneous nano-catalyst. Nitroanilines were reduced in the presence and without the catalyst with a constant amount (100 mg) of reducing agent of sodium borohydride (NaBH4 ) at room temperature in water to amino compounds. To characterize the functional groups, size, structure, and morphology of as-prepared magnetic NPs, FTIR, XRD, SEM, and TEM were employed. The UV-Vis spectrum was utilized to explore the catalytic effect of CuFe2 O4 . The outcomes revealed that the synthesized CuFe2 O4 as a heterogeneous magnetic nano-catalyst catalyzed the reduction of 4-NA and 2-NA significantly faster than other candidate catalysts. The outcomes demonstrated that the catalyst catalyzed 4-nitroaniline to para-phenylenediamine (p-PDA) and 2-nitroaniline to ortho-phenylenediamine (o-PDA) with a constant rate of 7.49×10-2 s-1 and 3.19×10-2 s-1 , and conversion percentage of 96.5 and 95.6, in 40 s and 90 s, sequentially. Furthermore, the nanoparticles could be recovered by a magnetic separation method and reused for six consecutive cycles without remarkable loss of catalytic ability.
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Affiliation(s)
- Samin Naghash‐Hamed
- Research Laboratory of PolymerDepartment of Organic and BiochemistryFaculty of ChemistryUniversity of TabrizTabrizIran
| | - Nasser Arsalani
- Research Laboratory of PolymerDepartment of Organic and BiochemistryFaculty of ChemistryUniversity of TabrizTabrizIran
| | - Seyed Borhan Mousavi
- J. Mike Walker ‘66 Mechanical Engineering DepartmentTexas A&M UniversityCollege StationTX 77843USA
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Dhoble RM, Rayalu S, Kularkar A, Hajare H. Arsenite removal from drinking water by bark-based magnetic iron oxide particle (BMIOP): a column study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:52544-52559. [PMID: 35262892 DOI: 10.1007/s11356-022-19443-0] [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: 10/04/2021] [Accepted: 02/22/2022] [Indexed: 06/14/2023]
Abstract
The removal of arsenite [As(III)] from drinking water was investigated in a column at flow rates of 2.0 and 5.0 mL/min (up-flow direction) using bark-based magnetic iron oxide particles (BMIOP) prepared by coating (Fe(NO3)3.9H2O) over Tamarindus Indica bark. The BMIOP was compared with regenerated BMIOP, commercial activated carbon, commercial activated alumina (Al2O3). At 2.0 mL/min, empty bed contact time (EBCT), breakthrough time (BT), the volume of treated water and breakthrough capacity (BC) on fresh BMIOP were found to be 6.8 min, 33.15 h, 4.380 L and 0.742 mg/g, respectively, and at 5.0 mL/min, were found to be 4.1 min, 13 h, 3.675 L and 0.453 mg/g respectively. EBCT, BT and BC were increased by 65.85%, 155% and 63.79%, respectively, as the flow rate was reduced from 5.0 to 2.0 mL/min. After regeneration of BMIOP, EBCT, BT, saturated time, BC and saturation capacity (SC) were reduced by 21.95%, 15.38%, 55.15%, 16.78% and 29.71%, respectively. The BC of fresh BMIOP was increased by factors 4.15, 3.60 and 1.20 and SC by factors 9.51, 7.88 and 1.42 compared to commercial activated carbon, commercial activated Al2O3 and regenerated BMIOP, respectively. Logit model could be used for the design of the adsorption column. Thomas model and artificial neural network (ANN) were applied to predict the characteristic column parameters useful for process design. Quality of treated water meets BIS requirements. Toxicity Characteristic Leaching Procedure (TCLP) and semi-dynamic tests show that the exhausted BMIOP is safe for disposal in a secure landfill; hence, BMIOP has been proved to separate As(III) from water.
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Affiliation(s)
- Rajesh M Dhoble
- Priyadarshini College of Engineering (PCE), Nagpur, 440019, Maharashtra, India.
| | - Sadhana Rayalu
- Environmental Material Division, CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur, Maharashtra, India
| | - Ankush Kularkar
- Environmental Material Division, CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur, Maharashtra, India
| | - Hemant Hajare
- ITM College of Engineering, Kamptee, 441001, Maharashtra, India
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