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Ghibaudo N, Ferretti M, Al-Hetlani E, Madkour M, Amin MO, Alberti S. Synthesis and characterization of TiO 2-based supported materials for industrial application and recovery in a pilot photocatalytic plant using chemometric approach. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:20556-20567. [PMID: 38376776 PMCID: PMC10927805 DOI: 10.1007/s11356-024-32467-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 02/09/2024] [Indexed: 02/21/2024]
Abstract
In this contribution, the performance of powdered titanium dioxide (TiO2)-based photocatalysts was evaluated in a pilot photocatalytic plant for the degradation of different dyes, with an investigated volume of 1 L and solar simulated light as irradiation source. Five different samples, synthesized in our laboratories, were tested in the pilot plant, each consisting of TiO2 nanoparticles (NPs) coupled with a different material (persistent luminescent material and semiconductor material) and treated in different thermal conditions. All synthesized samples have been subjected to X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller analysis (BET), and transmission electron microscopy (TEM) characterization, to shed light on the influence of introducing other materials on titania characteristics. To study and evaluate the significance of the parameters affecting the process in the pilot plant, a chemometric approach was applied, by selecting a mathematical model (D-Optimal) to simultaneously monitor a large number of variables (i.e., 7), both qualitative and quantitative, over a wide range of levels. At the same time, the recovery of the synthesized photocatalysts was studied following a novel promising recuperation method, i.e., annulling the surface charge of the suspended samples by reaching the isoelectric point (pHPZC) of each sample, for the quantitative precipitation of TiO2 nanoparticles.
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Affiliation(s)
- Nicolò Ghibaudo
- Chemistry and Industrial Chemistry Department, University of Genoa, Via Dodecaneso 31, 16146, Genoa (Ge), Italy
| | - Maurizio Ferretti
- Chemistry and Industrial Chemistry Department, University of Genoa, Via Dodecaneso 31, 16146, Genoa (Ge), Italy
| | - Entesar Al-Hetlani
- Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, 13060, Safat, Kuwait
| | - Metwally Madkour
- Chemistry Department, Faculty of Science, Arish University, Al-Arish, 45511, Egypt
| | - Mohamed O Amin
- Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, 13060, Safat, Kuwait
| | - Stefano Alberti
- Chemistry and Industrial Chemistry Department, University of Genoa, Via Dodecaneso 31, 16146, Genoa (Ge), Italy.
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Ahluwalia KK, Thakur K, Ahluwalia AS, Hashem A, Avila-Quezada GD, Abd_Allah EF, Thakur N. Assessment of Genotoxicity of Zinc Oxide Nanoparticles Using Mosquito as Test Model. TOXICS 2023; 11:887. [PMID: 37999539 PMCID: PMC10674525 DOI: 10.3390/toxics11110887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 10/25/2023] [Accepted: 10/26/2023] [Indexed: 11/25/2023]
Abstract
The widespread applications of ZnO NPs in the different areas of science, technology, medicine, agriculture, and commercial products have led to increased chances of their release into the environment. This created a growing public concern about the toxicological and environmental effects of the nanoparticles. The impact of these NPs on the genetic materials of living organisms is documented in some cultured cells and plants, but there are only a few studies regarding this aspect in animals. In view of this, the present work regarding the assessment of the genotoxicity of zinc oxide nanoparticles using the mosquito Culex quinquefaciatus has been taken up. Statistically significant chromosomal aberrations over the control are recorded after the exposure of the fourth instar larvae to a dose of less than LD20 for 24 h. In order to select this dose, LD20 of ZnO NPs for the mosquito is determined by Probit analysis. Lacto-aceto-orcein stained chromosomal preparations are made from gonads of adult treated and control mosquitoes. Both structural aberrations, such as chromosomal breaks, fragments, translocations, and terminal fusions, resulting in the formation of rings and clumped chromosomes, and numerical ones, including hypo- and hyper-aneuploidy at metaphases, bridges, and laggards at the anaphase stage are observed. The percentage frequency of abnormalities in the shape of sperm heads is also found to be statistically significant over the controls. Besides this, zinc oxide nanoparticles are also found to affect the reproductive potential and embryo development as egg rafts obtained from the genetic crosses of ZnO nanoparticle-treated virgin females and normal males are small in size with a far smaller number of eggs per raft. The percentage frequencies of dominant lethal mutations indicated by the frequency of unhatched eggs are also statistically significant (p < 0.05) over the control. The induction of abnormalities in all of the three short-term assays studied during the present piece of work indicates the genotoxic potential of ZnO NPs, which cannot be labeled absolutely safe, and this study pinpoints the need to develop strategies for the protection of the environment and living organisms thriving in it.
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Affiliation(s)
- Kanwaljit Kaur Ahluwalia
- Department of Zoology, Akal College of Basic Sciences, Eternal University, Baru Sahib, Himachal Pradesh 173101, India; (K.K.A.); (K.T.)
| | - Kritika Thakur
- Department of Zoology, Akal College of Basic Sciences, Eternal University, Baru Sahib, Himachal Pradesh 173101, India; (K.K.A.); (K.T.)
| | - Amrik Singh Ahluwalia
- Department of Botany, Akal College of Basic Sciences, Eternal University, Baru Sahib, Himachal Pradesh 173101, India;
| | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia;
| | | | - Elsayed Fathi Abd_Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia;
| | - Neelam Thakur
- Department of Zoology, Akal College of Basic Sciences, Eternal University, Baru Sahib, Himachal Pradesh 173101, India; (K.K.A.); (K.T.)
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Alanazi MQ, Virk P, Alterary SS, Awad M, Ahmad Z, Albadri AM, Ortashi K, Ahmed MMA, Ali Yousef MI, Elobeid M, Al-Qahtani EA. Effects of potential microplastics in sewage effluent on Nile Tilapia and photocatalytic remediation with zinc oxide nanoparticles. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023:121946. [PMID: 37307860 DOI: 10.1016/j.envpol.2023.121946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/30/2023] [Accepted: 05/31/2023] [Indexed: 06/14/2023]
Abstract
The aim of the present study was a qualitative assessment of potential microplastics (MPs) in the sewage effluent collected from a local sewage treatment plant located in Riyadh City, Saudi Arabia. The composite samples of domestic sewage effluent were subjected to UV (ultraviolet) light-induced zinc oxide nanoparticles (ZnONPs) mediated photocatalysis. The first phase of the study included the synthesis of the ZnONPs with an extensive characterization. The synthesized nanoparticles were 220 nm in size with a characteristic spherical/hexagonal shape. These NPs were then used at three different concentrations (10 mM, 20 mM, and 30 mM) for the UV light-induced photocatalysis. A shift in the Raman spectra on photodegradation mirrored the surface changes of the functional groups shown by the FTIR spectra; presence of functional groups containing oxygen and C-C bonds associated with oxidation and chain scission. SEM micrographs showed photodegraded particles. Complementary elemental maps from the EDS analysis showed the presence of C, O, and Cl suggesting the potential presence of MPs. The O/C ratio was used to assess potential oxidation degree. In addition, an evaluation of the toxicological effects of the potential MPs in the sewage effluent on Nile tilapia (Oreochromis niloticus) exposed to the effluent at two concentrations (50% and 75%) elicited a marked response in the endpoints evaluated; EROD activity, MDA (malondialdehyde), 8-oxo-2'-deoxyguanosine levels in and AChE (acetylcholinesterase) activity in the brain. Thus, the key results provide new insights into the use of clean technologies to combat global MP pollution in aquatic ecosystems.
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Affiliation(s)
- Manal Qayyadh Alanazi
- Department of Zoology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh, 11459, Saudi Arabia
| | - Promy Virk
- Department of Zoology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh, 11459, Saudi Arabia.
| | - Seham Soliman Alterary
- Department of Chemistry, College of Science, King Saud University, P. O. Box 11495, Riyadh, Saudi Arabia
| | - Manal Awad
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Zubair Ahmad
- Department of Zoology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh, 11459, Saudi Arabia
| | - Abdulrehman M Albadri
- Microelectronics and Semiconductors Institute, King Abdulaziz City for Science and Technology in Riyadh, 12354, Saudi Arabia
| | - KalidM Ortashi
- Department of Chemical Engineering, King Saud University, Riyadh, 11421, Saudi Arabia
| | | | | | - Mai Elobeid
- Department of Zoology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh, 11459, Saudi Arabia
| | - Ebtesam Abdullah Al-Qahtani
- Department of Zoology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh, 11459, Saudi Arabia
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Cardinale AM, Alberti S, Reverberi AP, Catauro M, Ghibaudo N, Fortunato M. Antibacterial and Photocatalytic Activities of LDH-Based Sorbents of Different Compositions. Microorganisms 2023; 11:microorganisms11041045. [PMID: 37110468 PMCID: PMC10144488 DOI: 10.3390/microorganisms11041045] [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: 03/24/2023] [Revised: 04/13/2023] [Accepted: 04/14/2023] [Indexed: 04/29/2023] Open
Abstract
Layered double hydroxides (LDHs) play a fundamental role in the processes for the abatement of pollutants in water, with reference to heavy metal decontamination. The research on the topic is multiobjective target oriented, aiming at combining environmental remediation with the possibility of reusing a sorbent as many times as possible, turning it into a renewable resource. In this study, the antibacterial and catalytic properties of a ZnAl-SO4 LDH and its resulting product after being subjected to a Cr(VI) remediation process are compared. Both solid substrates have also been tested after undergoing a thermal annealing process. The sorbent (previously described and tested for remediation) has been investigated for its antibacterial activity in view of further surgery and drug delivery applications. Finally, its photocatalytic properties have been experimentally tested in the degradation of a model pollutant, i.e., Methyl Orange (MO), under solar-simulated light. Identifying the best recycling strategy for these materials requires an accurate knowledge of their physicochemical properties. The results show that both the antimicrobial activity and the photocatalytic performance may considerably improve after thermal annealing.
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Affiliation(s)
- Anna Maria Cardinale
- DCCI, Department of Chemistry and Industrial Chemistry, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Stefano Alberti
- DCCI, Department of Chemistry and Industrial Chemistry, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Andrea Pietro Reverberi
- DCCI, Department of Chemistry and Industrial Chemistry, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Michelina Catauro
- Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, 81031 Aversa, Italy
| | - Nicolò Ghibaudo
- DCCI, Department of Chemistry and Industrial Chemistry, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Marco Fortunato
- DCCI, Department of Chemistry and Industrial Chemistry, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
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Sodha V, Koshti H, Gaur R, Ahmad I, Bandyopadhyay R, Shahabuddin S. Synthesis of zeolite-doped polyaniline composite for photocatalytic degradation of methylene blue from aqueous solution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:46159-46174. [PMID: 36710314 DOI: 10.1007/s11356-023-25556-x] [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: 08/21/2022] [Accepted: 01/21/2023] [Indexed: 06/18/2023]
Abstract
The generation of wastewater has increased rapidly with the expansion of industries, hence, posing a risk to human health and the environment. The development of novel materials and technologies for textile wastewater treatment is constantly evolving. In this work, the photocatalytic degradation of methylene blue employing ZSM-5 zeolite-doped polyaniline composites is presented. To fabricate ZSM-5-based polyaniline (PANI) composites, the simple approach of in situ oxidative polymerization has been adopted. Different weight ratios of ZSM-5 have been used for the synthesis, and samples have been labelled as PAZe-1, PAZe-5, and PAZe-10. Different characterization techniques were used to characterize the prepared composites, including field-emission scanning electron microscope (FESEM), transmission electron microscope (TEM), Fourier transform infrared (FT-IR), X-ray diffraction (XRD), and thermo-gravimetry analysis (TGA). The photocatalytic performance of polyaniline, ZSM-5, and their composites was assessed by monitoring the degradation of methylene blue in the presence of visible light. Degradation results of the polyaniline-doped composites were found to be better than that of the polyaniline alone. When the photocatalytic efficiencies of different composites were compared, the PAZe-1 showed the best performance, with 99.9% degradation efficiency after 210 min of irradiation, while PANI, PAZe-5, PAZe-10, and ZSM-5 show 38%, 82%, 71%, and 99% removal efficiency. Apart from methylene blue, the composite PAZe-1 was further explored for the degradation of other organic pollutants such as methyl orange, chlorpyrifos, 2,4-dichlorophenoxy acetic acid, and p-nitroaniline. To determine the reactive species involved in the photocatalysis mechanism, scavenger studies were performed.
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Affiliation(s)
- Veena Sodha
- Department of Chemistry, School of Energy Technology, Pandit Deendayal Energy University, Knowledge Corridor, Raisan, Gandhinagar, 382426, Gujarat, India
| | - Hardik Koshti
- Department of Chemistry, School of Energy Technology, Pandit Deendayal Energy University, Knowledge Corridor, Raisan, Gandhinagar, 382426, Gujarat, India
| | - Rama Gaur
- Department of Chemistry, School of Energy Technology, Pandit Deendayal Energy University, Knowledge Corridor, Raisan, Gandhinagar, 382426, Gujarat, India
| | - Irfan Ahmad
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha, 61421, Saudi Arabia
| | - Rajib Bandyopadhyay
- Department of Chemistry, School of Energy Technology, Pandit Deendayal Energy University, Knowledge Corridor, Raisan, Gandhinagar, 382426, Gujarat, India
| | - Syed Shahabuddin
- Department of Chemistry, School of Energy Technology, Pandit Deendayal Energy University, Knowledge Corridor, Raisan, Gandhinagar, 382426, Gujarat, India.
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Şendal K, Üstün Özgür M, Gülen J. Biosynthesis of ZnO photocatalyst and its application in photo catalytic degradation of methylene blue dyestuff. J DISPER SCI TECHNOL 2022. [DOI: 10.1080/01932691.2022.2125005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Kaan Şendal
- Department of Chemistry, Faculty of Arts and Science, Yildiz Technical University, Istanbul, Turkey
| | - Mahmure Üstün Özgür
- Department of Chemistry, Faculty of Arts and Science, Yildiz Technical University, Istanbul, Turkey
| | - Jale Gülen
- Department of Chemical Engineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Istanbul, Turkey
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The Role of Plant Growth-Promoting Rhizobacteria (PGPR) in Mitigating Plant’s Environmental Stresses. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12031231] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Phytoremediation is a cost-effective and sustainable technology used to clean up pollutants from soils and waters through the use of plant species. Indeed, plants are naturally capable of absorbing metals and degrading organic molecules. However, in several cases, the presence of contaminants causes plant suffering and limited growth. In such situations, thanks to the production of specific root exudates, plants can engage the most suitable bacteria able to support their growth according to the particular environmental stress. These plant growth-promoting rhizobacteria (PGPR) may facilitate plant growth and development with several beneficial effects, even more evident when plants are grown in critical environmental conditions, such as the presence of toxic contaminants. For instance, PGPR may alleviate metal phytotoxicity by altering metal bioavailability in soil and increasing metal translocation within the plant. Since many of the PGPR are also hydrocarbon oxidizers, they are also able to support and enhance plant biodegradation activity. Besides, PGPR in agriculture can be an excellent support to counter the devastating effects of abiotic stress, such as excessive salinity and drought, replacing expensive inorganic fertilizers that hurt the environment. A better and in-depth understanding of the function and interactions of plants and associated microorganisms directly in the matrix of interest, especially in the presence of persistent contamination, could provide new opportunities for phytoremediation.
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Synthesis and Characterization of Zinc Oxide Nanoparticles Using Acacia caesia Bark Extract and Its Photocatalytic and Antimicrobial Activities. Catalysts 2021. [DOI: 10.3390/catal11121507] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
This paper presents the green synthesis and characterization of ZnO nanoparticles and their microbial and photocatalytic application. The green synthesis of ZnO nanoparticles was carried out using Zinc nitrate hexahydrate and the bark extract of Acacia caesia (L.) Willd. The nanoparticles were synthesized at an optimum temperature of 65 °C followed by calcination at 400 °C. The samples were characterized using UV-visible spectroscopy, SEM, XRD, FTIR and EDX analysis. UV-visible spectroscopy showed a characteristic peak at 338 nm and the bandgap energy was found to be 3 eV which is specific for ZnO. SEM confirmed the presence of ZnO on its nanoscale. EDX gave the elemental details of Zinc constituting to 37.77% and Oxygen comprising 20.77% of its atomic weight. XRD analysis gave the diffractogram indexed at various angles corresponding to ZnO nanoparticles. It also revealed the average crystalline size to be 32.32 nm and the shape was found to be hexagonal. The functional group present in the nanoparticles was characterized using FTIR, which gave a characteristic peak at 485 cm−1. The synthesized nanoparticles exhibited significant photocatalytic (methyl blue under UV irradiation). The presence of nanoparticles induces changes in its kinetics, whose rate constants and correlation coefficients were analyzed during the photocatalytic degradation of the model pollutant Methyl Blue. Studies on antibacterial (Escherichia coli, Staphylococcus aureus), antifungal (Aspergillus niger, Candida albicans) and anti-inflammatory (COX assay) properties were also carried out. The nanoparticles were synthesized in an eco-friendly and cost-effective method. The study opens new horizons in the field of water treatment, biosensors and nanotechnology.
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