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Kadian A, Manikandan V, Chen CL, Dong CL, Annapoorni S. Synergistically enhanced photocatalytic properties of Co 3O 4-G/GO nanocomposites: unravelling their interactions and charge-transfer dynamics using XAS. Dalton Trans 2024. [PMID: 39073405 DOI: 10.1039/d4dt01405g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
Metal oxide composites with graphene/graphene oxide have increasingly gained popularity in enhancing the photocatalytic degradation of several existing harmful dyes. Moreover, identifying the role of carbon networks and their interactions in composite formation would assist in the design and development of photocatalysts. In the present study, we investigated the role of carbon networks in improving photocatalytic properties. Electronic structure analysis of cobalt oxide-graphene (C2)/graphene oxide (C3) nanocomposites using XAS suggested possible charge transfer from cobalt oxide nanoparticles to the carbon network during composite formation. The photocatalytic degradation of C3 towards phenol dye (1 × 10-3 M) was >50% and improved the degradation rate with k = 0.231 h-1.In the quest to understand the mechanism unfolding on its surface, in situ XAS under UV-visible irradiation was performed, which shed light on delayed excitonic recombination in the synthesized nanocomposites. This enabled hydroxy radicals (˙OH) to play a preeminent role in the cleavage of the phenol ring and its intermediaries. Based on these observations, a detailed mechanism for charge transfer occurring during nanocomposite formation and the mechanism involved in the enhanced photocatalytic activity of the nanocomposite photocatalyst towards phenol degradation under the influence of UV-visible irradiation are discussed.
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Affiliation(s)
- Ankit Kadian
- Department of Physics and Astrophysics, University of Delhi, Delhi - 110007, India.
| | - V Manikandan
- Department of Physics and Astrophysics, University of Delhi, Delhi - 110007, India.
| | - C L Chen
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
| | - C L Dong
- Department of Physics, Tamkang University, Tamsui 251301, Taiwan
| | - S Annapoorni
- Department of Physics and Astrophysics, University of Delhi, Delhi - 110007, India.
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Cao P, Li Y, Shao J. Experimental Study on the Preparation of Lignin-Based Activated Carbon and the Adsorption Performance for Phenol. ACS OMEGA 2024; 9:24453-24463. [PMID: 38882099 PMCID: PMC11170647 DOI: 10.1021/acsomega.4c00352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 05/08/2024] [Accepted: 05/14/2024] [Indexed: 06/18/2024]
Abstract
Biomass waste and wastewater are important wastes in the process of industrialization, which need to be effectively treated and utilized. In this work, an innovative method of collaborative treatment of biomass waste and phenol-containing wastewater is proposed. Biomass waste was used to produce activated carbon (AC), and then AC was used for phenol removal in wastewater treatment. Two kinds of typical biomass waste material, namely, coconut shell and lignin, were used. Physical activation (steam activation) and chemical activation methods were compared. Results show that steam activation is an effective method for coconut shell AC production. The largest Brunauer-Emmett-Teller (BET) surface area was 1065 m2/g at 800 °C. Chemical activation could produce AC samples with higher BET specific surface area. The lignin AC with K2CO3 activation has the largest BET surface of 1723.8 m2/g at 800 °C. FTIR results indicated that K2CO3 activation could greatly enhance the formation of surface oxygen-containing functional groups. Both coconut shell AC and lignin AC samples show excellent performance for phenol removal. The highest phenol removal efficiency for coconut shell AC and lignin AC are 96.87% and 98.22%, respectively. Adsorption kinetic analysis show that the pseudo-first-order kinetic model is able to describe the adsorption characteristics of phenol in wastewater treatment. Recycling properties show that regeneration of lignin AC could maintain high adsorption performance for phenol.
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Affiliation(s)
- Ping Cao
- School of Chemistry and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Yuting Li
- School of Chemistry and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Jingli Shao
- Shanghai Composite Material Science & Technology Co., Ltd., Shanghai 201112, China
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Yao C, Wu H, Li X, Chen Q, Zhang W, Yu G, Liu H, Miao Y, Wu W. Molecular insights into dicationic versus monocationic ionic liquids as a high hydrophobic alternative for the separation of phenol from waters. ENVIRONMENTAL RESEARCH 2024; 248:118420. [PMID: 38316384 DOI: 10.1016/j.envres.2024.118420] [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: 10/27/2023] [Revised: 01/17/2024] [Accepted: 02/02/2024] [Indexed: 02/07/2024]
Abstract
The hydrophobic nature of an extractant is particularly critical in the treatment of wastewater. Considering that dicationic ionic liquids (DILs) are likely to be more hydrophobic, a comparative study of the separation of phenol from waters using [NTf2]- based monocationic ionic liquids (MILs) and DILs is carried out both from experimental and theoretical analysis perspectives. Experimental results revealed that DILs exhibited superior extraction ability compared to MILs, with extraction efficiencies of 93.7% and 97.4% using [BMIM][NTf2] and [C6(MIM)2][NTf2]2 as extractants, respectively. The microscopic examination through theoretical calculations elucidated the higher hydrophobicity and extraction efficiency of DILs over MILs. The results indicated that the DIL showed stronger hydrophobicity than the MIL because the hydrogen bond strength between the DIL and water was lower than that of the MIL. Although the hydrogen bond strength between the DIL and phenol was lower than that of the MIL, the stronger van der Waals forces existed between DIL and phenol, so DIL was more efficient in extracting phenol. In addition, the experimental parameters were optimized to provide basic data for application, such as mass ratio of ILs to water, extraction time and temperature, pH, and initial phenol content. Finally, the DILs were recovered using rotary evaporation apparatus, and the results demonstrated that DILs had good recovery and reuse performance. In brief, this work could provide an effective method for the treatment of phenol-containing wastewater. And the revelation of molecular mechanism is expected to positively impact the design of high-performance task-specific ILs.
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Affiliation(s)
- Congfei Yao
- Institute of Bismuth and Rhenium Science, School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, China; State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Haisong Wu
- Institute of Bismuth and Rhenium Science, School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Xiaoyu Li
- Institute of Bismuth and Rhenium Science, School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Qiuyu Chen
- Institute of Bismuth and Rhenium Science, School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Wanxiang Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Gangqiang Yu
- Faculty of Environment and Life, Beijing University of Technology, Beijing, 100124, China
| | - Hongqi Liu
- Institute of Bismuth and Rhenium Science, School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Yuqing Miao
- Institute of Bismuth and Rhenium Science, School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, China.
| | - Weize Wu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
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Hollanda LR, de Souza JAB, Dotto GL, Foletto EL, Chiavone-Filho O. Iron-bearing mining reject as an alternative and effective catalyst for photo-Fenton oxidation of phenol in water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:21291-21301. [PMID: 38383932 DOI: 10.1007/s11356-024-32513-9] [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: 12/14/2023] [Accepted: 02/13/2024] [Indexed: 02/23/2024]
Abstract
In this work, iron-bearing mining reject was employed as an alternative and potential low-cost catalyst to degrade phenol in water by photo-Fenton strategy. Various techniques, including SEM-EDS, BET, FTIR, and XRD, were applied to evaluate the material's properties. Process parameters such as hydrogen peroxide concentration, catalyst dosage, and pH were studied to determine the optimum reaction conditions ([catalyst] = 0.75 g L-1, [H2O2] = 7.5 mM, and pH = 3). Phenol degradation and mineralization efficiencies at 180 and 300 min were 96.5 and 78%, respectively. These satisfactory results can be associated with the iron amount present in the waste sample. Furthermore, the material showed high catalytic activity and negligible iron leaching even after the fourth reuse cycle. The degradation behavior of phenol in water was well represented by a kinetic model based on the Fermi function. The iron-bearing mining reject can be considered a potential photo-Fenton catalyst for phenol degradation in wastewater.
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Affiliation(s)
- Luana Rabelo Hollanda
- Department of Chemical Engineering, Federal University of Rio Grande Do Norte, Natal, 59078-970, Brazil
| | | | - Guilherme Luiz Dotto
- Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil.
| | - Edson Luiz Foletto
- Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
| | - Osvaldo Chiavone-Filho
- Department of Chemical Engineering, Federal University of Rio Grande Do Norte, Natal, 59078-970, Brazil
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Łątka P, Olszański B, Żurowska M, Dębosz M, Rokicińska A, Kuśtrowski P. Spherical Lignin-Derived Activated Carbons for the Adsorption of Phenol from Aqueous Media. Molecules 2024; 29:960. [PMID: 38474471 DOI: 10.3390/molecules29050960] [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: 01/08/2024] [Revised: 02/08/2024] [Accepted: 02/20/2024] [Indexed: 03/14/2024] Open
Abstract
In this work, a synthesis and activation path, which enabled the preparation of spherical activated carbon from a lignin precursor, characterized by high adsorption capacity in the removal of phenolic compounds from water, was successfully developed. Two industrial by-products, i.e., Kraft lignin and sodium lignosulfonate, were used to form spherical nanometric lignin grains using pH and solvent shift methods. The obtained materials became precursors to form porous activated carbons via chemical activation (using K2CO3 or ZnCl2 as activating agents) and carbonization (in the temperature range of 600-900 °C). The thermal stabilization step at 250 °C was necessary to ensure the sphericity of the grains during high-temperature heat treatment. The study investigated the influence of the type of chemical activator used, its quantity, and the method of introduction into the lignin precursor, along with the carbonization temperature, on various characteristics including morphology (examined by scanning electron microscopy), the degree of graphitization (evaluated by powder X-ray diffraction), the porosity (assessed using low-temperature N2 adsorption), and the surface composition (analyzed with X-ray photoelectron spectroscopy) of the produced carbons. Finally, the carbon materials were tested as adsorbents for removing phenol from an aqueous solution. A conspicuous impact of microporosity and a degree of graphitization on the performance of the investigated adsorbents was found.
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Affiliation(s)
- Piotr Łątka
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Bazyli Olszański
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Magdalena Żurowska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
- Doctoral School of Exact and Natural Sciences, Jagiellonian University, St. Łojasiewicza 11, 30-348 Kraków, Poland
| | - Marek Dębosz
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Anna Rokicińska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Piotr Kuśtrowski
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
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Lv Z, Wang Z, Wang H, Li J, Li K. Adsorption of cationic/anionic dyes and endocrine disruptors by yeast/cyclodextrin polymer composites. RSC Adv 2024; 14:6627-6641. [PMID: 38390511 PMCID: PMC10882443 DOI: 10.1039/d3ra07682b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 02/17/2024] [Indexed: 02/24/2024] Open
Abstract
Factory and natural wastewaters contain a wide range of organic pollutants. Therefore, multifunctional adsorbents must be developed that can purify wastewater. Phytic acid-cross-linked Baker's yeast cyclodextrin polymer composites (IBY-PA-CDP) were prepared using a one-pot method. IBY-PA-CDP was used to adsorb methylene blue (MB), bisphenol A (BPA), and methyl orange (MO). Studies on the ionic strength and strongly acidic ion salts confirmed that IBY-PA-CDP adsorbs MO through hydrophobic interactions. This also shows that Na+ was the direct cause of the increased MO removal. Adsorption studies on binary systems showed that MB/MO inhibited the adsorption of BPA by IBY-PA-CDP. The presence of MB increased the removal rate of MO by IBY-PA-CDP due to the bridging effect. The Langmuir isotherm model calculated the maximum adsorption capacities for MB and BPA to be 630.96 and 83.31 mg g-1, respectively. However, the Freundlich model is more suitable for fitting the experimental data for MO adsorption. To understand the rate-limiting stage of adsorption, a mass-transfer mechanism model was employed. The fitting results show that adsorption onto the active sites is the rate-determining step. After five regeneration cycles, IBY-PA-CDP could be reused with good stability and recyclability.
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Affiliation(s)
- Zhikun Lv
- College of Light Industry and Food Engineering, Guangxi University Nanning 530004 Guangxi China +86 13978609908 +86 13877115103
| | - Zhaoyang Wang
- College of Light Industry and Food Engineering, Guangxi University Nanning 530004 Guangxi China +86 13978609908 +86 13877115103
| | - Huaiguang Wang
- College of Light Industry and Food Engineering, Guangxi University Nanning 530004 Guangxi China +86 13978609908 +86 13877115103
| | - Jianbin Li
- College of Light Industry and Food Engineering, Guangxi University Nanning 530004 Guangxi China +86 13978609908 +86 13877115103
- Provincial and Ministerial Collaborative Innovation Center for Sugar Industry Nanning 530004 China
- Engineering Research Center for Sugar Industry and Comprehensive Utilization, Ministry of Education Nanning 530004 China
| | - Kai Li
- College of Light Industry and Food Engineering, Guangxi University Nanning 530004 Guangxi China +86 13978609908 +86 13877115103
- Provincial and Ministerial Collaborative Innovation Center for Sugar Industry Nanning 530004 China
- Engineering Research Center for Sugar Industry and Comprehensive Utilization, Ministry of Education Nanning 530004 China
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Lu D, Liu C, Zhu F, Liu Y, Lin Y, Yang Q, Han S. Fabrication and performance of novel multifunctional sodium alginate/polyvinylpyrrolidone hydrogels. CHEMOSPHERE 2024; 348:140758. [PMID: 37995971 DOI: 10.1016/j.chemosphere.2023.140758] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 11/13/2023] [Accepted: 11/17/2023] [Indexed: 11/25/2023]
Abstract
In this work, a novel alginate/polyvinylpyrrolidone (SA/PVP-Fe) hydrogel spheres were prepared by cross-linking with Fe2+ ions after blending sodium alginate with polyvinylpyrrolidone. The degradation performance of the hydrogels was assessed through the degradation of phenol, achieving 100% degradation and about 64% total organic carbon (TOC) mineralization within 60 min (initial concentration of phenol = 20 mg/L; H2O2 concentration = 5 mM; initial pH = 6.5; catalyst dosage = 1.0 g/L). Degradation kinetics were monitored using high-performance liquid chromatography (HPLC). The structural and chemical properties of the hydrogels were characterized using scanning electron microscopy (SEM), energy spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and Inductively coupled plasma mass spectrometry (ICP-MS). Additionally, the hydrogels exhibited multiple reuse cycles, albeit with a gradual decline in degradation performance. Mechanistic investigations revealed that the hydroxyl radical derived from the Fenton reaction was the primary active species responsible for the degradation process. This research provides valuable insights into improving the mechanical properties of sodium alginate hydrogels, opening up avenues for their practical applications.
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Affiliation(s)
- Deli Lu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, PR China.
| | - Chen Liu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, PR China
| | - Fengtian Zhu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, PR China
| | - Ying Liu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, PR China
| | - Yushi Lin
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, PR China
| | - Qidong Yang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, PR China
| | - Sheng Han
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, PR China.
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