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Villafranca JC, Berton P, Ferguson M, Clausen R, Arancibia-Miranda N, Martinis EM. Aluminosilicates-based nanosorbents for heavy metal removal - A review. JOURNAL OF HAZARDOUS MATERIALS 2024; 474:134552. [PMID: 38823105 DOI: 10.1016/j.jhazmat.2024.134552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/17/2024] [Accepted: 05/03/2024] [Indexed: 06/03/2024]
Abstract
Contamination of water bodies with heavy metals poses a significant threat to human health and the environment, requiring the development of effective treatment techniques. In this context, aluminosilicates emerge as promising sorbents due to their cost-effectiveness and natural abundance. This review provides a clear, in-depth, and comprehensive description of the structure, properties, and characteristics of aluminosilicates, supporting their application as adsorbents and highlighting their diversity and adaptability to different matrices and analytes. Furthermore, the functionalization of these materials is thoroughly addressed, detailing the techniques currently used, exposing the advantages and disadvantages of each approach, and establishing comparisons and evaluations of the performances of various functionalized aluminosilicates in the extraction of heavy metals in aqueous matrices. This work aims not only to comprehensively review numerous studies from recent years but also to identify trends in the study of such materials and inspire future research and applications in the field of contaminant removal using aluminosilicates.
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Affiliation(s)
- Juan C Villafranca
- Facultad de Ingeniería, Universidad Nacional de Cuyo - Centro Universitario, Mendoza, M5500 Mendoza, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Paula Berton
- Chemical and Petroleum Engineering Department, University of Calgary, Calgary, AB, Canada
| | - Michael Ferguson
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Ruth Clausen
- Facultad de Ingeniería, Universidad Nacional de Cuyo - Centro Universitario, Mendoza, M5500 Mendoza, Argentina
| | - Nicolás Arancibia-Miranda
- Center for the Development of Nanoscience and Nanotechnology, CEDENNA, Santiago, Chile; Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Estefanía M Martinis
- Facultad de Ingeniería, Universidad Nacional de Cuyo - Centro Universitario, Mendoza, M5500 Mendoza, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina; Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mendoza, Argentina.
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Asghar N, Hussain A, Nguyen DA, Ali S, Hussain I, Junejo A, Ali A. Advancement in nanomaterials for environmental pollutants remediation: a systematic review on bibliometrics analysis, material types, synthesis pathways, and related mechanisms. J Nanobiotechnology 2024; 22:26. [PMID: 38200605 PMCID: PMC10777661 DOI: 10.1186/s12951-023-02151-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 10/09/2023] [Indexed: 01/12/2024] Open
Abstract
Environmental pollution is a major issue that requires effective solutions. Nanomaterials (NMs) have emerged as promising candidates for pollution remediation due to their unique properties. This review paper provides a systematic analysis of the potential of NMs for environmental pollution remediation compared to conventional techniques. It elaborates on several aspects, including conventional and advanced techniques for removing pollutants, classification of NMs (organic, inorganic, and composite base). The efficiency of NMs in remediation of pollutants depends on their dispersion and retention, with each type of NM having different advantages and disadvantages. Various synthesis pathways for NMs, including traditional synthesis (chemical and physical) and biological synthesis pathways, mechanisms of reaction for pollutants removal using NMs, such as adsorption, filtration, disinfection, photocatalysis, and oxidation, also are evaluated. Additionally, this review presents suggestions for future investigation strategies to improve the efficacy of NMs in environmental remediation. The research so far provides strong evidence that NMs could effectively remove contaminants and may be valuable assets for various industrial purposes. However, further research and development are necessary to fully realize this potential, such as exploring new synthesis pathways and improving the dispersion and retention of NMs in the environment. Furthermore, there is a need to compare the efficacy of different types of NMs for remediating specific pollutants. Overall, this review highlights the immense potential of NMs for mitigating environmental pollutants and calls for more research in this direction.
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Affiliation(s)
- Nosheen Asghar
- Department of Global Smart City, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea.
| | - Alamdar Hussain
- Department of Botany, University of Baltistan, Skardu 16400, Gilgit-Baltistan, Pakistan
| | - Duc Anh Nguyen
- Department of Global Smart City, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Salar Ali
- Department of Environmental Science, University of Baltistan, Skardu 16400, Gilgit-Baltistan, Pakistan
| | - Ishtiaque Hussain
- Department of Environmental Science, University of Baltistan, Skardu 16400, Gilgit-Baltistan, Pakistan
- Department of Environmental Science, Quaid-i-Azam University of Islamabad, Islamabad, 15320, Pakistan
| | - Aurangzeb Junejo
- Department of Global Smart City, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Attarad Ali
- Department of Environmental Science, University of Baltistan, Skardu 16400, Gilgit-Baltistan, Pakistan.
- Directorate of Quality Enhancement Cell, University of Baltistan, Skardu 16400, Gilgit-Baltistan, Pakistan.
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3
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Das TK, Jesionek M, Çelik Y, Poater A. Catalytic polymer nanocomposites for environmental remediation of wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 901:165772. [PMID: 37517738 DOI: 10.1016/j.scitotenv.2023.165772] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 07/15/2023] [Accepted: 07/23/2023] [Indexed: 08/01/2023]
Abstract
The removal of harmful chemicals and species from water, soil, and air is a major challenge in environmental remediation, and a wide range of materials have been studied in this regard. To identify the optimal material for particular applications, research is still ongoing. Polymer nanocomposites (PNCs), which combine the benefits of nanoparticles with polymers, an alternative to conventional materials, may open up new possibilities to overcome this difficulty. They have remarkable mechanical capabilities and compatibility due to their polymer matrix with a very high surface area to volume ratio brought about by their special physical and chemical properties, and the extremely reactive surfaces of the nanofillers. Composites also provide a viable answer to the separation and reuse problems that hinder nanoparticles in routine use. Understanding these PNCs materials in depth and using them in practical environmental applications is still in the early stages of development. The review article demonstrates a crisp introduction to the PNCs with their advantageous properties as a catalyst in environmental remediation. It also provides a comprehensive explanation of the design procedure and synthesis methods for fabricating PNCs and examines in depth the design methods, principles, and design techniques that guide proper design. Current developments in the use of polymer nanocomposites for the pollutant treatment using three commonly used catalytic processes (catalytic and redox degradation, electrocatalytic degradation, and biocatalytic degradation) are demonstrated in detail. Additionally, significant advances in research on the aforementioned catalytic process and the mechanism by which contaminants are degraded are also amply illustrated. Finally, there is a summary of the research challenges and future prospects of catalytic PNCs in environmental remediation.
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Affiliation(s)
- Tushar Kanti Das
- Institute of Physics - Center for Science and Education, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland.
| | - Marcin Jesionek
- Institute of Physics - Center for Science and Education, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland
| | - Yasemin Çelik
- Department of Materials Science and Engineering, Eskişehir Technical University, 26555 Eskişehir, Turkey
| | - Albert Poater
- Institute of Computational Chemistry and Catalysis, Department of Chemistry, University of Girona, c/Maria Aurèlia Capmany 69, 17003 Girona, Spain.
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Mijwel AAS, Ahmed AN, Afan HA, Alayan HM, Sherif M, Elshafie A. Artificial intelligence models for methylene blue removal using functionalized carbon nanotubes. Sci Rep 2023; 13:18260. [PMID: 37880280 PMCID: PMC10600184 DOI: 10.1038/s41598-023-45032-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 10/14/2023] [Indexed: 10/27/2023] Open
Abstract
This study aims to assess the practicality of utilizing artificial intelligence (AI) to replicate the adsorption capability of functionalized carbon nanotubes (CNTs) in the context of methylene blue (MB) removal. The process of generating the carbon nanotubes involved the pyrolysis of acetylene under conditions that were determined to be optimal. These conditions included a reaction temperature of 550 °C, a reaction time of 37.3 min, and a gas ratio (H2/C2H2) of 1.0. The experimental data pertaining to MB adsorption on CNTs was found to be extremely well-suited to the Pseudo-second-order model, as evidenced by an R2 value of 0.998, an X2 value of 5.75, a qe value of 163.93 (mg/g), and a K2 value of 6.34 × 10-4 (g/mg min).The MB adsorption system exhibited the best agreement with the Langmuir model, yielding an R2 of 0.989, RL value of 0.031, qm value of 250.0 mg/g. The results of AI modelling demonstrated a remarkable performance using a recurrent neural network, achieving with the highest correlation coefficient of R2 = 0.9471. Additionally, the feed-forward neural network yielded a correlation coefficient of R2 = 0.9658. The modeling results hold promise for accurately predicting the adsorption capacity of CNTs, which can potentially enhance their efficiency in removing methylene blue from wastewater.
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Affiliation(s)
- Abd-Alkhaliq Salih Mijwel
- Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional (UNITEN), 43000, Kajang, Selangor, Malaysia
| | - Ali Najah Ahmed
- Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional (UNITEN), 43000, Kajang, Selangor, Malaysia.
- Institute of Energy Infrastructure, Universiti Tenaga Nasional (UNITEN), 43000, Kajang, Selangor, Malaysia.
| | | | - Haiyam Mohammed Alayan
- Chemical Engineering Department, University of Technology, Al-Sinaa Street 52, Baghdad, 10066, Iraq.
| | - Mohsen Sherif
- National Water and Energy Center, United Arab Emirates University, P.O. Box 15551, Al Ain, United Arab Emirates
- Civil and Environmental Engineering Department, College of Engineering, United Arab Emirates University, 15551, Al Ain, United Arab Emirates
| | - Ahmed Elshafie
- Department of Civil Engineering, Faculty of Engineering, University of Malaya (UM), 50603, Kuala Lumpur, Malaysia
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Ghamarpoor R, Jamshidi M, Fallah A, Eftekharipour F. Preparation of dual-use GPTES@ZnO photocatalyst from waste warm filter cake and evaluation of its synergic photocatalytic degradation for air-water purification. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 342:118352. [PMID: 37311344 DOI: 10.1016/j.jenvman.2023.118352] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 05/24/2023] [Accepted: 06/07/2023] [Indexed: 06/15/2023]
Abstract
Organic pollutants are the most critical threats to the health of air and water resources. On this basis, fabricating a photocatalytic acrylic film with dual-use (i.e. removing benzene from air and MB/MO dyes from water) was aimed in this research. For this purpose, waste warm filter cake (WWFC) was used to extract zinc from it. Zinc element was separated from WWFC by a basic leaching method and acidified to prepare zinc oxide nanoparticles. In the following, a simple hydrothermal method was used to increase the surface functionality of the extracted ZnO nanoparticles in order to establish active reaction sites for reaction to silane coupling agent and increase in the holes that were prepared during photo-excitation. Thereafter, the nanoparticles were modified with 3-glycidoxypropyltriethoxysilane (GPTES) at different concentrations. The band gap of the modified nanoparticles decreased from 3.25 to 3.1 eV by surface modification. The photocatalytic performance of ZnO nanoparticles was assessed by degradation of MB and MO aqueous solution (50 ppm) under simulated UV/Visible irradiations. MB and MO were degraded 91 and 60% under UV light and 65 and 50% under visible light after 150 min of irradiation. The photo degradation rate increased after adding carboxy methyl cellulose (CMC) surfactant to methylene blue and adding cocamide-dea (CDE-G) surfactant to methyl orange. The results confirmed that the green surfactants improve the dispersion and surface interaction of the modified nanoparticles in the dyes solution and cause more electron charge transfer which creates effective photocatalytic sites. The prepared nanocomposite films were placed in a photo-reactor to remove gaseous benzene from air under UV/visible irradiation. Gas chromatography (GC) results showed that the modified nanoparticles removed up to 35.25 and 20.34% of benzene from air. Colorimetric analysis (ΔE*) showed that the acrylic film contained modified nanoparticles degraded 91 and 82% of MB, and 85 and 76% of MO under UV/visible lights, respectively. In the end, it can be said that these photocatalytic films are able to remove environmental pollution in air and water.
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Affiliation(s)
- Reza Ghamarpoor
- Constructional Polymers and Composites Research Lab., School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Tehran, Iran
| | - Masoud Jamshidi
- Constructional Polymers and Composites Research Lab., School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Tehran, Iran.
| | - Akram Fallah
- Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran
| | - Fatemeh Eftekharipour
- Constructional Polymers and Composites Research Lab., School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Tehran, Iran
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Cauduro GP, Marmitt M, Ferraz M, Arend SN, Kern G, Modolo RCE, Leal AL, Valiati VH. Burkholderia vietnamiensis G4 as a biological agent in bioremediation processes of polycyclic aromatic hydrocarbons in sludge farms. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 195:116. [PMID: 36394643 DOI: 10.1007/s10661-022-10733-1] [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: 01/25/2022] [Accepted: 11/05/2022] [Indexed: 06/16/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are one of the main pollutants generated by the refining and use of oil. To search bioremediation alternatives for these compounds, mainly in situ, considering the biotic and abiotic variables that affect the contaminated sites is determinant for the success of bioremediation techniques. In this study, bioremediation strategies were evaluated in situ, including biostimulation and bioaugmentation for 16 priority PAHs present in activated sludge farms. B. vietnamiensis G4 was used as a biodegradation agent for bioaugmentation tests. The analyses occurred for 12 months, and temperature and humidity were measured to verify the effects of these factors on the biodegradation. We used the technique GC-MS to evaluate and quantify the degradation of PAHs over the time of the experiment. Of the four treatments applied, bioaugmentation with quarterly application proved to be the best strategy, showing the degradation of compounds of high (34.4% annual average) and low (21.9% annual average) molecular weight. A high degradation rate for high molecular weight compounds demonstrates that this technique can be successfully applied in bioremediation of areas with compounds considered toxic and stable in nature, contributing to the mitigation of impacts generated by PAHs.
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Affiliation(s)
- Guilherme Pinto Cauduro
- Laboratory of Genetics and Molecular Biology, Programa de Pós-Graduação Em Biologia, Universidade Do Vale Do Rio Dos Sinos (UNISINOS), Av. Unisinos 950, São Leopoldo, RS, 93022-750, Brazil
| | - Marcela Marmitt
- Laboratory of Genetics and Molecular Biology, Programa de Pós-Graduação Em Biologia, Universidade Do Vale Do Rio Dos Sinos (UNISINOS), Av. Unisinos 950, São Leopoldo, RS, 93022-750, Brazil
| | - Marlon Ferraz
- Laboratory of Fish Ecology, Programa de Pós-Graduação Em Biologia, Universidade Do Vale Do Rio Dos Sinos (UNISINOS), São Leopoldo, RS, Brazil
| | - Sabrina Nicole Arend
- Laboratory of Genetics and Molecular Biology, Programa de Pós-Graduação Em Biologia, Universidade Do Vale Do Rio Dos Sinos (UNISINOS), Av. Unisinos 950, São Leopoldo, RS, 93022-750, Brazil
| | - Gabriela Kern
- Laboratory of Genetics and Molecular Biology, Programa de Pós-Graduação Em Biologia, Universidade Do Vale Do Rio Dos Sinos (UNISINOS), Av. Unisinos 950, São Leopoldo, RS, 93022-750, Brazil
| | - Regina Célia Espinosa Modolo
- Programa de Pós-Graduação Em Engenharia Civil, Escola Politécnica, Universidade Do Vale Do Rio Dos Sinos (UNISINOS), São Leopoldo, RS, Brazil
| | - Ana Lusia Leal
- Superintendence for the Treatment of Wastewater, SITEL/CORSAN, Companhia Riograndense de Saneamento, Polo Petroquímico Do Sul, Triunfo, RS, Brazil
| | - Victor Hugo Valiati
- Laboratory of Genetics and Molecular Biology, Programa de Pós-Graduação Em Biologia, Universidade Do Vale Do Rio Dos Sinos (UNISINOS), Av. Unisinos 950, São Leopoldo, RS, 93022-750, Brazil.
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Saravanan A, Kumar PS, Hemavathy RV, Jeevanantham S, Jawahar MJ, Neshaanthini JP, Saravanan R. A review on synthesis methods and recent applications of nanomaterial in wastewater treatment: Challenges and future perspectives. CHEMOSPHERE 2022; 307:135713. [PMID: 35843436 DOI: 10.1016/j.chemosphere.2022.135713] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 06/27/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
Freshwater has been incessantly polluted by various activities such as rapid industrialization, fast growth of population and agricultural activities. Water pollution is considered as one the major threatens to human health and aquatic bodies which causes various severe harmful diseases including gastrointestinal disorders, asthma, cancer, etc. The polluted wastewater could be treated by different conventional and advanced methodologies. Amongst them, adsorption is the most utilized low cost, efficient technique to treat and remove the harmful pollutants from the wastewater. The efficiency of adsorption mainly depends on the surface properties such as functional group availability and surface area of the adsorbents used. Since various waste-based carbon derivatives are utilized as adsorbents for harmful pollutants removal; nanomaterials are employed as effective adsorbents in recent times due to its excellent surface properties. This review presents an overview of the different types of nanomaterials such as nano-particles, nanotubes, nano-sheets, nano-rods, nano-spheres, quantum dots, etc. which have been synthesized by different chemical and green synthesis methodologies using plants, microorganisms, biomolecules and carbon derivatives, metals and metal oxides and polymers. By concentrating on potential research difficulties, this study offers a new viewpoint on fundamental field of nanotechnology for wastewater treatment applications. This review paper critically reviewed the synthesis of nanomaterials more importantly green synthesis and their applications in wastewater treatment to remove the harmful pollutants such as heavy metals, dyes, pesticides, polycyclic aromatic hydrocarbons, etc.
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Affiliation(s)
- A Saravanan
- Department of Sustainable Engineering, Institute of Biotechnology, Saveetha School of Engineering, SIMATS, 602105, Chennai, India
| | - P Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, 603110, Chennai, India; Centre of Excellence in Water Research (CEWAR), Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603110, India.
| | - R V Hemavathy
- Department of Biotechnology, Rajalakshmi College of Engineering, Chennai, 602105, India
| | - S Jeevanantham
- Department of Biotechnology, Rajalakshmi College of Engineering, Chennai, 602105, India
| | - Marie Jyotsna Jawahar
- Department of Biotechnology, Rajalakshmi College of Engineering, Chennai, 602105, India
| | - J P Neshaanthini
- Department of Biotechnology, Rajalakshmi College of Engineering, Chennai, 602105, India
| | - R Saravanan
- Department of Mechanical Engineering, Universidad de Tarapacá, Arica, Chile
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Vorobyev SA, Novikova GV, Demina AV, Shidlovskiy IP, Volochaev MN. Synthesis and synergistic effect of antibacterial composites based on concentrated hydrosols of silver nanoparticles combined with cephalosporins antibiotics. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Odhiambo VO, Le Ba T, Kónya Z, Cserháti C, Erdélyi Z, C Naomi M, Miklós Szilágyi I. Preparation of TiO2–MoO3 composite nanofibers by water-based electrospinning process and their application in photocatalysis. MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING 2022. [DOI: 10.1016/j.mssp.2022.106699] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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The Sensitization of TiO2 Thin Film by Ag Nanoparticles for the Improvement of Photocatalytic Efficiency. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12115725] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The formation of Ag nanoparticles on the surface of TiO2 (AgNP/TiO2) to enhance photocatalytic efficiency was studied. The Ag nanoparticles (AgNP) size, form, and distribution dependence on the initial thickness of Ag thin films, annealing temperature, and time were analyzed. The optimal annealing temperature of 400 °C and annealing time of 60 min were chosen to form AgNP from the initial Ag thin films with a thickness of 5, 7.5, and 10 nm. The formation of AgNP was done on amorphous TiO2 (a-TiO2), which crystallized into the anatase phase after the annealing. The photocatalytic efficiency (k–degradation rate constant, Defi–degradation efficiency) was evaluated by the photodegradation of Rhodamine B aqueous solution. The results suggested that the highest photocatalytic efficiency of Rhodamine B aqueous solution was reached where the average diameter (DA) of AgNP was ~38 nm (k38 = 0.017 min−1, Defi_38 = 63.5%), compared to 27 and 82 nm (k27 = 0.012 min−1, Defi_27 = 51.2% and k82 = 0.011 min−1, Defi_82 = 52.1%, respectively). The acquired results did not show clear correlation between the size and distribution of the AgNP on the TiO2 surface and photocatalytic efficiency. Nevertheless, the results suggest that AgNP can enhance the photocatalytic efficiency of TiO2 thin films (kTiO2 = 0.008 min−1, Defi_TiO2 = 36.3%).
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Mishra S, Chauhan G, Verma S, Singh U. The emergence of nanotechnology in mitigating petroleum oil spills. MARINE POLLUTION BULLETIN 2022; 178:113609. [PMID: 35417809 DOI: 10.1016/j.marpolbul.2022.113609] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 12/29/2021] [Accepted: 03/23/2022] [Indexed: 06/14/2023]
Abstract
The world has witnessed the circumstances shaped by the oil spill for many decades that cause serious environmental problems and adverse effects on human health. Many techniques and remediation methods are followed for efficient oil spill cleanups but with the limitations and environmental issues, these procedures were not completely efficient. The "nanotechnology" word itself has fascinated not only the researchers but also many industries and the global race is on to tap its potential and to derive benefit from it. Their small size and exceptional properties have proven their potential in providing technological solutions to engineering problems. This study focuses on the scope of nanotechnology in oil spill cleanups and shows how the limitations presented by conventional methodologies can be overcome. This paper categorizes and thoroughly reviews the application of nanotechnology in oil spill cleanups in different forms and also focuses on the environmental aspects of it.
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Affiliation(s)
- Saurabh Mishra
- Energy Science and Technology Program, Centre for Advanced Studies, Lucknow, India.
| | - Geetanjali Chauhan
- Department of Petroleum Engineering, Indian Institute of Petroleum and Energy, Visakhapatnam, India
| | - Samarpit Verma
- Energy Science and Technology Program, Centre for Advanced Studies, Lucknow, India
| | - Ujjawal Singh
- Energy Science and Technology Program, Centre for Advanced Studies, Lucknow, India
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Mehta G, Cornell SE, Krief A, Hopf H, Matlin SA. A shared future: chemistry's engagement is essential for resilience of people and planet. ROYAL SOCIETY OPEN SCIENCE 2022; 9:212004. [PMID: 35601450 PMCID: PMC9039782 DOI: 10.1098/rsos.212004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 03/14/2022] [Indexed: 05/03/2023]
Abstract
Strengthening resilience-elasticity or adaptive capacity-is essential in responding to the wide range of natural hazards and anthropogenic changes humanity faces. Chemistry's roles in resilience are explored for the first time, with its technical capacities set in the wider contexts of cross-disciplinary working and the intersecting worlds of science, society and policy. The roles are framed by chemistry's contributions to the sustainability of people and planet, examined via the human security framework's four material aspects of food, health, economic and environmental security. As the science of transformation of matter, chemistry is deeply involved in these material aspects and in their interfacing with human security's three societal and governance aspects of personal, community and political security. Ultimately, strengthening resilience requires making choices about the present use of resources as a hedge against future hazards and adverse events, with these choices being co-determined by technical capacities and social and political will. It is argued that, to intensify its contributions to resilience, chemistry needs to take action along at least three major lines: (i) taking an integrative approach to the field of 'chemistry and resilience'; (ii) rethinking how the chemical industry operates; and (iii) engaging more with society and policy-makers.
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Affiliation(s)
- Goverdhan Mehta
- School of Chemistry, University of Hyderabad, Gachibowli, Hyderabad, Telangana 500046, India
- International Organization for Chemical Sciences in Development, 61 rue de Bruxelles, 5000 Namur, Belgium
| | - Sarah E. Cornell
- Stockholm Resilience Centre, Stockholm University, Kräftriket 2B, 10691 Stockholm, Sweden
| | - Alain Krief
- International Organization for Chemical Sciences in Development, 61 rue de Bruxelles, 5000 Namur, Belgium
- Department of Chemistry, University of Namur, 61 rue de Bruxelles, 5000 Namur, Belgium
| | - Henning Hopf
- International Organization for Chemical Sciences in Development, 61 rue de Bruxelles, 5000 Namur, Belgium
- Institute of Organic Chemistry, Technical University of Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Stephen A. Matlin
- International Organization for Chemical Sciences in Development, 61 rue de Bruxelles, 5000 Namur, Belgium
- Institute of Global Health Innovation, Imperial College London, South Kensington, London SW7 2AZ, UK
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Hussain A, Rehman F, Rafeeq H, Waqas M, Asghar A, Afsheen N, Rahdar A, Bilal M, Iqbal HMN. In-situ, Ex-situ, and nano-remediation strategies to treat polluted soil, water, and air - A review. CHEMOSPHERE 2022; 289:133252. [PMID: 34902385 DOI: 10.1016/j.chemosphere.2021.133252] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 12/02/2021] [Accepted: 12/09/2021] [Indexed: 02/05/2023]
Abstract
Nanotechnology, as an emerging science, has taken over all fields of life including industries, health and medicine, environmental issues, agriculture, biotechnology etc. The use of nanostructure molecules has revolutionized all sectors. Environmental pollution is a great concern now a days, in all industrial and developing as well as some developed countries. A number of remedies are in practice to overcome this problem. The application of nanotechnology in the bioremediation of environmental pollutants is a step towards revolution. The use of various types of nanoparticles (TiO2 based NPs, dendrimers, Fe based NPs, Silica and carbon nanomaterials, Graphene based NPs, nanotubes, polymers, micelles, nanomembranes etc.) is in practice to diminish environmental hazards. For this many In-situ (bioventing, bioslurping, biosparging, phytoremediation, permeable reactive barrier etc.) and Ex-situ (biopile, windrows, bioreactors, land farming etc.) methodologies are employed. Improved properties like nanoscale size, less time utilization, high adaptability for In-situ and Ex-situ use, undeniable degree of surface-region to-volume proportion for possible reactivity, and protection from ecological elements make nanoparticles ideal for natural applications. There are distinctive nanomaterials and nanotools accessible to treat the pollutants. Each of these methods and nanotools depends on the properties of foreign substances and the pollution site. The current designed review highlights the techniques used for bioremediation of environmental pollutants as well as use of various nanoparticles along with proposed In-situ and Ex-situ bioremediation techniques.
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Affiliation(s)
- Asim Hussain
- Department of Biochemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Fazeelat Rehman
- Department of Chemistry, School of Natural Sciences, National University of Sciences & Technology, Islamabad 44000, Pakistan
| | - Hamza Rafeeq
- Department of Biochemistry, Riphah International University, Faisalabad, 38000, Pakistan
| | - Muhammad Waqas
- Department of Applied Sciences, National Textile University Faisalabad, 37610, Pakistan
| | - Asma Asghar
- Department of Biochemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Nadia Afsheen
- Department of Biochemistry, Riphah International University, Faisalabad, 38000, Pakistan
| | - Abbas Rahdar
- Department of Physics, University of Zabol, Zabol, P. O. Box. 98613-35856, Iran
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huai'an 223003, China.
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, 64849, Mexico.
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Mohanraj R, Gnanamangai BM, Rajivgandhi GN, Li WJ, Vijayalakshmi G, Ponmurugan P, Alharbi NS, Kadaikunnan S, Khaled JM, Alanzi KF. Monitoring the decolourisation efficacy of advanced membrane fabricated phytosilica nanoparticles in textile effluent water treatment. CHEMOSPHERE 2021; 273:129681. [PMID: 33517117 DOI: 10.1016/j.chemosphere.2021.129681] [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: 11/15/2020] [Revised: 12/23/2020] [Accepted: 01/15/2021] [Indexed: 06/12/2023]
Abstract
Silica nanoparticles are generally mesoporous that are predominant in the sand and rocks. Silica nanoparticles have a wide range of applications in various fields such as medicine, waste management, effluent treatment and electronics. The present work has explored the synthesis of silica nanoparticles through acid and alkaline leaching method from Pedalium murex which is a common weed that is found in southern parts of Tamil Nadu. Silica nanoparticles (SiNps) and its functional groups were confirmed by EDX and FTIR analysis with their respective energy dispersion levels and wavenumbers. Size, shape and morphological features of SiNps were analysed by PSA, TEM and SAED analysis. Synthesised and characterized nanosilica was crosslinked over nylon-66 and cellulose nitrate membranes and were confirmed by FTIR analysis for their crosslinking with SiNps. Water retention activity of the crosslinked and non crosslinked membranes was analysed by contact angle measurement to ensure the receptability of the membranes to remove contaminants by the adsorption. The decolourisation efficiency of the crosslinked nylon 66 membrane was found as a potential source for the treatment with 65.5% colour reduction when compared with other membranes. A slight reduction of solid profiles and COD ranges were achieved for crosslinked membranes than non crosslinked membranes.
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Affiliation(s)
- Rajamanickam Mohanraj
- Department of Biotechnology, K. S. Rangasamy College of Technology, Tiruchengode, 637215, Namakkal District, Tamil Nadu, India
| | | | - Govindan Nadar Rajivgandhi
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, PR China; State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, PR China.
| | - Wen-Jun Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, PR China; State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, PR China.
| | - GiriRajan Vijayalakshmi
- Department of Biotechnology, K. S. Rangasamy College of Technology, Tiruchengode, 637215, Namakkal District, Tamil Nadu, India
| | - Ponnusamy Ponmurugan
- Department of Botany, Bharathiyar University, Coimbatore, 641046, Tamil Nadu, India
| | - Naiyf S Alharbi
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Shine Kadaikunnan
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Jamal M Khaled
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Khalid F Alanzi
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
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Peddinti SR, Hopmans JW, Abou Najm M, Kisekka I. Assessing Effects of Salinity on the Performance of a Low-Cost Wireless Soil Water Sensor. SENSORS 2020; 20:s20247041. [PMID: 33316968 PMCID: PMC7764491 DOI: 10.3390/s20247041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/05/2020] [Accepted: 12/07/2020] [Indexed: 11/16/2022]
Abstract
Low-cost, accurate soil water sensors combined with wireless communication in an internet of things (IoT) framework can be harnessed to enhance the benefits of precision irrigation. However, the accuracy of low-cost sensors (e.g., based on resistivity or capacitance) can be affected by many factors, including salinity, temperature, and soil structure. Recent developments in wireless sensor networks offer new possibilities for field-scale monitoring of soil water content (SWC) at high spatiotemporal scales, but to install many sensors in the network, the cost of the sensors must be low, and the mechanism of operation needs to be robust, simple, and consume low energy for the technology to be practically relevant. This study evaluated the performance of a resistivity–capacitance-based wireless sensor (Sensoterra BV, 1018LE Amsterdam, Netherlands) under different salinity levels, temperature, and soil types in a laboratory. The sensors were evaluated in glass beads, Oso Flaco sand, Columbia loam, and Yolo clay loam soils. A nonlinear relationship was exhibited between the sensor measured resistance (Ω) and volumetric soil water content (θ). The Ω–θ relationship differed by soil type and was affected by soil solution salinity. The sensor was extremely sensitive at higher water contents with high uncertainty, and insensitive at low soil water content accompanied by low uncertainty. The soil solution salinity effects on the Ω–θ relationship were found to be reduced from sand to sandy loam to clay loam. In clay soils, surface electrical conductivity (ECs) of soil particles had a more dominant effect on sensor performance compared to the effect of solution electrical conductivity (ECw). The effect of temperature on sensor performance was minimal, but sensor-to-sensor variability was substantial. The relationship between bulk electrical conductivity (ECb) and volumetric soil water content was also characterized in this study. The results of this study reveal that if the sensor is properly calibrated, this low-cost wireless soil water sensor has the potential of improving soil water monitoring for precision irrigation and other applications at high spatiotemporal scales, due to the ease of integration into IoT frameworks.
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Affiliation(s)
- Srinivasa Rao Peddinti
- Department of Land, Air & Water Resources, University of California Davis, Davis, CA 95616, USA; (S.R.P.); (J.W.H.); (M.A.N.)
| | - Jan W. Hopmans
- Department of Land, Air & Water Resources, University of California Davis, Davis, CA 95616, USA; (S.R.P.); (J.W.H.); (M.A.N.)
| | - Majdi Abou Najm
- Department of Land, Air & Water Resources, University of California Davis, Davis, CA 95616, USA; (S.R.P.); (J.W.H.); (M.A.N.)
| | - Isaya Kisekka
- Department of Land, Air & Water Resources, University of California Davis, Davis, CA 95616, USA; (S.R.P.); (J.W.H.); (M.A.N.)
- Department of Biological and Agricultural Engineering, University of California Davis, Davis, CA 95616, USA
- Correspondence:
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Singh H, Bhardwaj N, Arya SK, Khatri M. Environmental impacts of oil spills and their remediation by magnetic nanomaterials. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.enmm.2020.100305] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Aminu A, Oladepo SA. Fast Orange Peel-Mediated Synthesis of Silver Nanoparticles and Use as Visual Colorimetric Sensor in the Selective Detection of Mercury(II) Ions. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2020. [DOI: 10.1007/s13369-020-05030-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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18
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Wedad A. Al-onazi, Alarfaj NA, El-Tohamy MF, Al-Malki NA. Facile Dual Enhanced Modes of Nanoparticles/Sodium Dodecyl Sulfate for Luminescent Detection of Vitamin C in Commercial Fruit Juices. JOURNAL OF ANALYTICAL CHEMISTRY 2020. [DOI: 10.1134/s1061934820100020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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El-Sharkawy RG, Taha RH, Ghanem HB. Immobilization of novel inorganic nano-complexes onto MWCNT nanomaterials as a novel adsorbent and anti-inflammatory therapy in an induced model of rheumatoid arthritis. NANOTECHNOLOGY 2020; 31:305706. [PMID: 32235044 DOI: 10.1088/1361-6528/ab851a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Novel supported inorganic metal nano-complexes of Ag(I) and Co(II) derived from 4-amino-N-(4-methylpyrimidin-2-yl) benzene sulfonamide (SulMer) were synthesized using olive leaf extract as a reducing agent with grinding and microwave methods. The prepared samples were denoted as Comp1-6. The surface morphologies of the synthesized nanomaterials were analyzed using C, H, N, S analysis, Fourier-transform infrared spectroscopy, UV- visible spectroscopy, proton and carbon nuclear magnetic resonance, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, and x-ray powder diffraction (XRD) analysis. The data revealed that all the synthesized complexes exhibited a 1:1 metal-to-ligand ratio with a coordination number of 4 or 6. The mean particle size of the nanomaterial samples was 25-35 nm. The XRD patterns indicated a crystalline nature for the complexes. The supported inorganic metal nano-complexes displayed good activity in the adsorptive removal of Direct Red 81 (DR-81) from aqueous solutions. In addition, the effect of the supported metal nano-complexes on the immune system was studied as well as how these anti-inflammatory compounds could be used to treat many autoimmune diseases, most notably rheumatoid arthritis. An experimental model for arthritis can be induced using complete Freund's adjuvant. It was shown that the supported complex offers several advantages such stability, eco-friendliness, simple experimental conditions, short reaction times, and easy work- up.
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Affiliation(s)
- Rehab G El-Sharkawy
- Chemistry Department, College of Science, Jouf University, Sakaka 2014, Saudi Arabia. Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt
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Hamid A, Khan M, Hayat A, Raza J, Zada A, Ullah A, Raziq F, Li T, Hussain F. Probing the physio-chemical appraisal of green synthesized PbO nanoparticles in PbO-PVC nanocomposite polymer membranes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 235:118303. [PMID: 32276226 DOI: 10.1016/j.saa.2020.118303] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 03/16/2020] [Accepted: 03/23/2020] [Indexed: 06/11/2023]
Abstract
Different plants can be used to prepare nanoparticles. This is termed as green technology. It is one of the best ecofriendly and low-cost method for the preparation of nanoparticles which has no harmful effects. PbO nanoparticles were prepared by green method using leaf extract of Datura Sternum plants. The preparation of Lead oxide was confirmed by color change from colorless to yellowish brown. UV-Visible peak obtained at 250 nm and XRD study clarified the formation of PbO NPs. These PbO nanoparticles were then applied for the preparation of Nano Composite Polymer Membranes (nCPMs). PbO-PVC nCPMs were prepared based on polyvinyl chloride (PVC) polymer and PbO filler with the help of solution casting method, using cyclohexanone as a solvent. Different percentage (5-35%) of filler was used. The physiochemical parameters studied were viscosity, water uptake (WU), perpendicular swelling (DT) in deionized water, density, porosity (ε), morphology, ion adsorption capacity (IAC) and electrical conductivity (σ). The values of all these parameters except viscosity and conductivity were increased on increasing filler percentage. Viscosity of the nCPMs solution was decreased from 171 to 46.21. The conductivity of nCPMs was first increased upto 25% filler and then decreased. The deformation in PVC structure was increased on enhancing PbO amount. The values of Density, porosity, water uptake, DT and IAC were found in range 1.15-5.02, 0.50-0.87, 72.01-141.30, 0.012-0.11, and 3.13 × 107-8.60 × 107 respectively.
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Affiliation(s)
- Abdul Hamid
- Department of Chemistry, University of Okara, Renala Khurd, Okara, Punjab, Pakistan
| | - Muhammad Khan
- Department of Chemistry, University of Okara, Renala Khurd, Okara, Punjab, Pakistan; School of Materials Science and Engineering, Northwestern Polytechnical University, Xian 710072, PR China.
| | - Asif Hayat
- School of Chemistry, Fuzhou University, PR China.
| | - Junaid Raza
- Department of Chemistry, University of Okara, Renala Khurd, Okara, Punjab, Pakistan
| | - Amir Zada
- Department of Chemistry, Abdul Wali Khan University, Mardan 23200, K.P.K, Pakistan
| | - Azeem Ullah
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xian 710072, PR China
| | - Fazal Raziq
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Tiehu Li
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xian 710072, PR China
| | - Fakhar Hussain
- Department of Chemistry, University of Okara, Renala Khurd, Okara, Punjab, Pakistan
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Abstract
Recent years have witnessed an incredibly high interest in perovskite-based materials. Among this class, metal halide perovskites (MHPs) have attracted a lot of attention due to their easy preparation and excellent opto-electronic properties, showing a remarkably fast development in a few decades, particularly in solar light-driven applications. The high extinction coefficients, the optimal band gaps, the high photoluminescence quantum yields and the long electron–hole diffusion lengths make MHPs promising candidates in several technologies. Currently, the researchers have been focusing their attention on MHPs-based solar cells, light-emitting diodes, photodetectors, lasers, X-ray detectors and luminescent solar concentrators. In our review, we firstly present a brief introduction on the recent discoveries and on the remarkable properties of metal halide perovskites, followed by a summary of some of their more traditional and representative applications. In particular, the core of this work was to examine the recent progresses of MHPs-based materials in photocatalytic applications. We summarize some recent developments of hybrid organic–inorganic and all-inorganic MHPs, recently used as photocatalysts for hydrogen evolution, carbon dioxide reduction, organic contaminant degradation and organic synthesis. Finally, the main limitations and the future potential of this new generation of materials have been discussed.
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Saxena P, Sangela V. Toxicity evaluation of iron oxide nanoparticles and accumulation by microalgae Coelastrella terrestris. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:19650-19660. [PMID: 32221830 DOI: 10.1007/s11356-020-08441-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 03/13/2020] [Indexed: 06/10/2023]
Abstract
Uses of iron oxide nanoparticles have increased in the last decade. The increased application marked a concern regarding their fate and behavior in the environment. Especially towards the aquatic ecosystems, as the ultimate descend of these iron oxide nanoparticles are aquatic bodies. The greater surface area per mass compared with larger-sized materials of the same chemistry renders these nanoparticles biologically more active. Therefore, it is imperative to assess their eco-toxicogical impact on aquatic eco-systems. In the present study, comparative assessment of iron oxide nanoparticles and their bulk counterpart have been monitored using Coelastrella terrestris up to 40 days. Interestingly, study reveals the potential of Coelastrella terrestris as tool for the bioremediation of iron nanoparticles to combat nano-pollution. Adsorption/absorption kinetics measured after 25 days of treatments with iron oxide nanoparticle and its bulk counterpart revealed higher absorption levels in comparison to the adsorption with maximum accumulation factor (AF) of 2.984 at 50 mg L-1 in nano-form. Iron oxide absorption was found linearly related with concentration in both cases (y = 11.313x-12.165, R2 = 0.8691 in nano; y = 6.35x-5.74, R2 = 0.8128 in bulk). However, 50-mg L-1 nanoparticle concentration was perceived sub-lethal for the algae with 33.33% algal growth reduction under nano and 27.77% under bulk counterpart. Other biochemical parameters, i.e., SOD, CAT, MDA, and lipid quantification, were also quantified to correlate the state of metabolism of treated algal cells in comparison to the control and these exhibited reduction in algal growth due to oxidative stress. Morphological changes were monitored through SEM and TEM.
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Affiliation(s)
- Pallavi Saxena
- Plant Biotechnology Laboratory, Department of Botany, Mohanlal Sukhadia University, Udaipur, Rajasthan, 313001, India
| | - Vishambhar Sangela
- Plant Biotechnology Laboratory, Department of Botany, Mohanlal Sukhadia University, Udaipur, Rajasthan, 313001, India
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Nawaz A, Saravanan P. C-Dot TiO2 nanorod composite for enhanced quantum efficiency under direct sunlight. RSC Adv 2020; 10:19490-19500. [PMID: 35515458 PMCID: PMC9054048 DOI: 10.1039/d0ra03157g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 05/07/2020] [Indexed: 02/03/2023] Open
Abstract
Watermelon rind-derived C-dots were prepared via a facile route and decorated on Ti nanorods for enhanced electron mobilisation and visible light utilisation.
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Affiliation(s)
- Ahmad Nawaz
- Environmental Nanotechnology Laboratory
- Department of Environmental Science and Engineering
- Indian Institute of Technology (Indian School of Mines)
- Dhanbad
- India
| | - Pichiah Saravanan
- Environmental Nanotechnology Laboratory
- Department of Environmental Science and Engineering
- Indian Institute of Technology (Indian School of Mines)
- Dhanbad
- India
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24
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Can the photocatalyst TiO2 be incorporated into a wastewater treatment method? Background and prospects. Catal Today 2020. [DOI: 10.1016/j.cattod.2018.10.020] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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25
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Ciambelli P, La Guardia G, Vitale L. Nanotechnology for green materials and processes. STUDIES IN SURFACE SCIENCE AND CATALYSIS 2020. [DOI: 10.1016/b978-0-444-64337-7.00007-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Varshney R, Kumar S, Ghosh K, Patra D. Fabrication of dual catalytic microcapsules by mesoporous graphitic carbon nitride (mpg-C3N4) nanoparticle–enzyme conjugate stabilized emulsions. NEW J CHEM 2020. [DOI: 10.1039/c9nj05322k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dual catalytic microcapsules (MCs) were fabricated by simultaneous self-assembly and cross-linking of mpg-C3N4 nanoparticles (NPs) and lipase conjugates at oil–water interface.
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Affiliation(s)
- Rohit Varshney
- Institute of Nano Science and Technology
- Habitat Centre
- Mohali
- India
| | - Sushil Kumar
- Institute of Nano Science and Technology
- Habitat Centre
- Mohali
- India
| | - Kaushik Ghosh
- Institute of Nano Science and Technology
- Habitat Centre
- Mohali
- India
| | - Debabrata Patra
- Institute of Nano Science and Technology
- Habitat Centre
- Mohali
- India
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Abstract
The increasing demand for fossil fuels and the depleting of light crude oil in the next years generates the need to exploit heavy and unconventional crude oils. To face this challenge, the oil and gas industry has chosen the implementation of new technologies capable of improving the efficiency in the enhanced recovery oil (EOR) processes. In this context, the incorporation of nanotechnology through the development of nanoparticles and nanofluids to increase the productivity of heavy and extra-heavy crude oils has taken significant importance, mainly through thermal enhanced oil recovery (TEOR) processes. The main objective of this paper is to provide an overview of nanotechnology applied to oil recovery technologies with a focus on thermal methods, elaborating on the upgrading of the heavy and extra-heavy crude oils using nanomaterials from laboratory studies to field trial proposals. In detail, the introduction section contains general information about EOR processes, their weaknesses, and strengths, as well as an overview that promotes the application of nanotechnology. Besides, this review addresses the physicochemical properties of heavy and extra-heavy crude oils in Section 2. The interaction of nanoparticles with heavy fractions such as asphaltenes and resins, as well as the variables that can influence the adsorptive phenomenon are presented in detail in Section 3. This section also includes the effects of nanoparticles on the other relevant mechanisms in TEOR methods, such as viscosity changes, wettability alteration, and interfacial tension reduction. The catalytic effect influenced by the nanoparticles in the different thermal recovery processes is described in Sections 4, 5, 6, and 7. Finally, Sections 8 and 9 involve the description of an implementation plan of nanotechnology for the steam injection process, environmental impacts, and recent trends. Additionally, the review proposes critical stages in order to obtain a successful application of nanoparticles in thermal oil recovery processes.
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Pereira da Costa Araújo A, Lima VS, Emmanuela de Andrade Vieira J, Mesak C, Malafaia G. First report on the mutagenicity and cytotoxicity of Zno nanoparticles in reptiles. CHEMOSPHERE 2019; 235:556-564. [PMID: 31276868 DOI: 10.1016/j.chemosphere.2019.06.164] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 06/20/2019] [Accepted: 06/21/2019] [Indexed: 06/09/2023]
Abstract
Understanding how human activities affect animal biodiversity is essential to investigations about the biological effects of several pollutants and contaminants dispersed in the environment. This is the case of zinc oxide nanoparticles (ZnO NPs), which are emerging pollutants whose effect on reptiles' health is completely unknown. Thus, the objective of the present study is to evaluate the possible damages induced by these NPs in Podocnemis expansa juveniles (Amazon turtle) by using morphological changes of circulating erythrocytes as nuclear toxicity biomarker. The animals were exposed to the intramuscular administration of 440 μg/kg and 440,000 μg/kg of ZnO NPs, for 10 consecutive days. The micronuclei assay and other nuclear abnormalities were performed at the end of the experiment, as well as different morphometric measurements applied to the erythrocytes. Based on the current data, ZnO NPs induced nuclear abnormalities such as micronuclei and binucleation, which are associated with carcinogenic processes and with flaws in the mitotic machinery. The low "nuclear area: erythrocyte area" ratio and larger cytoplasmic area observed for animals exposed to NPs evidenced erythrocytic change induction likely related to negative energy balance/metabolism interferences and/or to oxygen transportation efficiency by erythrocytes. This is the first report on the mutagenic and cytotoxic effect induced by NPs on representatives of a group of reptiles. This outcome suggests that further investigations must focus on better understanding the (eco)toxicological potential of ZnO NPs.
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Affiliation(s)
- Amanda Pereira da Costa Araújo
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Biological Research Laboratory, Goiano Federal Institute, Urutaí Campus, GO, Brazil
| | - Vinícius Silva Lima
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Biological Research Laboratory, Goiano Federal Institute, Urutaí Campus, GO, Brazil
| | - Julya Emmanuela de Andrade Vieira
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Biological Research Laboratory, Goiano Federal Institute, Urutaí Campus, GO, Brazil
| | - Carlos Mesak
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Biological Research Laboratory, Goiano Federal Institute, Urutaí Campus, GO, Brazil
| | - Guilherme Malafaia
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Biological Research Laboratory, Goiano Federal Institute, Urutaí Campus, GO, Brazil.
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Muhyuddin M, Ahsan MT, Ali I, Khan TF, Akram MA, Basit MA. A new insight into solar paint concept: regeneration of CuS nanoparticles for paintable counter electrodes in QDSSCs. APPLIED PHYSICS A 2019; 125:716. [DOI: 10.1007/s00339-019-3009-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 09/12/2019] [Indexed: 09/01/2023]
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Sohail MI, Waris AA, Ayub MA, Usman M, Zia ur Rehman M, Sabir M, Faiz T. Environmental application of nanomaterials: A promise to sustainable future. ENGINEERED NANOMATERIALS AND PHYTONANOTECHNOLOGY: CHALLENGES FOR PLANT SUSTAINABILITY 2019. [DOI: 10.1016/bs.coac.2019.10.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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32
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Kumar N, Hu Y, Singh S, Mizaikoff B. Emerging biosensor platforms for the assessment of water-borne pathogens. Analyst 2018; 143:359-373. [PMID: 29271425 DOI: 10.1039/c7an00983f] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Pathogens are key contaminants in water that are responsible for the generation of various water-borne diseases, and include viruses, fungi, bacteria, and protozoan parasites. The pathogenic effects of these species in water depend on their shape, size, composition, and structure. The resulting water-borne diseases are a serious threat to the environment, including to humans and animals, and are directly responsible for environmental deterioration and pollution. The potential presence of these pathogens requires sensitive, powerful, efficient, and ideally real-time monitoring methods for their reproducible quantification. Conventional methods for pathogen detection mainly rely on time-consuming enrichment steps followed by biochemical identification strategies, which require assay times ranging from 24 h to up to a week. However, in recent years, significant efforts have been made towards the development of biosensing technologies enabling rapid and close-to-real-time detection of water-borne pathogens. This review summarizes recent developments in biosensors and sensing systems based on a variety of transducer technologies for water-quality monitoring, with specific focus on rapid pathogen detection.
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Affiliation(s)
- Nishant Kumar
- CSIR-Central Scientific Instruments Organisation, Chandigarh, India.
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Mostafavi S, Rezaverdinejad V, Pirsa S. Design and fabrication of nanocomposite-based polyurethane filter for improving municipal waste water quality and removing organic pollutants. ADSORPT SCI TECHNOL 2018. [DOI: 10.1177/0263617418815272] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Nanotechnology has been used in different industries for years. In this study, polyurethane filter, modified with nano-sized polypyrrole–ZnO was used for wastewater quality improvement. The effect of coating method and influential parameters on polymer morphology was studied by Fourier transform infrared spectroscopy and scanning electron microscopy. The results revealed that the uniformly synthesized polymers are seed like. The size of synthesized nanoparticles was observed to be about 50–120 nm. The effect of the number of iterative filtration and the height of the filter on improving the quality of the waste water was investigated using central composite design. After filtration, spectroscopy method, gas chromatography method, and some other devices such as biochemical oxygen demand meter and salt meter were used to evaluate the quality of the waste water. The results indicated that the filter efficiency in optimizing parameters such as total dissolved solids, biochemical oxygen demand, chemical oxygen demand, color, salinity, hardness, pH, and organic compounds removal is desirable. After data modeling, the optimal thickness of the filter was 3.8 cm and the most appropriate iteration for filtration was eight times obtained using a graphical method. Results showed that the designed filter had an excellent ability to improve wastewater quality and can be used in water and wastewater refining instruments.
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Synthesis and Characterization of 1D-MoO3 Nanorods Using Abutilon indicum Extract for the Photoreduction of Hexavalent Chromium. J Inorg Organomet Polym Mater 2018. [DOI: 10.1007/s10904-018-0970-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Anne JM, Boon YH, Saad B, Miskam M, Yusoff MM, Shahriman MS, Zain NNM, Lim V, Raoov M. β-Cyclodextrin conjugated bifunctional isocyanate linker polymer for enhanced removal of 2,4-dinitrophenol from environmental waters. ROYAL SOCIETY OPEN SCIENCE 2018; 5:180942. [PMID: 30225083 PMCID: PMC6124096 DOI: 10.1098/rsos.180942] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 07/18/2018] [Indexed: 05/17/2023]
Abstract
In this work, we reported the synthesis, characterization and adsorption study of two β-cyclodextrin (βCD) cross-linked polymers using aromatic linker 2,4-toluene diisocyanate (2,4-TDI) and aliphatic linker 1,6-hexamethylene diisocyanate (1,6-HDI) to form insoluble βCD-TDI and βCD-HDI. The adsorption of 2,4-dinitrophenol (DNP) on both polymers as an adsorbent was studied in batch adsorption experiments. Both polymers were well characterized using various tools that include Fourier transform infrared spectroscopy, thermogravimetric analysis, Brunauer-Emmett-Teller analysis and scanning electron microscopy, and the results obtained were compared with the native βCD. The adsorption isotherm of 2,4-DNP onto polymers was studied. It showed that the Freundlich isotherm is a better fit for βCD-TDI, while the Langmuir isotherm is a better fit for βCD-HMDI. The pseudo-second-order kinetic model represented the adsorption process for both of the polymers. The thermodynamic study showed that βCD-TDI polymer was more favourable towards 2,4-DNP when compared with βCD-HDI polymer. Under optimized conditions, both βCD polymers were successfully applied on various environmental water samples for the removal of 2,4-DNP. βCD-TDI polymer showed enhanced sorption capacity and higher removal efficiency (greater than 80%) than βCD-HDI (greater than 70%) towards 2,4-DNP. The mechanism involved was discussed, and the effects of cross-linkers on βCD open up new perspectives for the removal of toxic contaminants from a body of water.
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Affiliation(s)
- J. M. Anne
- School of Chemical Sciences, Universiti Sains Malaysia, 11800, Pulau Pinang, Malaysia
| | - Y. H. Boon
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, 13200 Bertam, Pulau Pinang, Malaysia
| | - B. Saad
- Department of Fundamental and Applied Sciences, Faculty of Science and Information Technology, Universiti Teknologi Petronas, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia
| | - M. Miskam
- School of Chemical Sciences, Universiti Sains Malaysia, 11800, Pulau Pinang, Malaysia
| | - M. M. Yusoff
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, 13200 Bertam, Pulau Pinang, Malaysia
| | - M. S. Shahriman
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, 13200 Bertam, Pulau Pinang, Malaysia
| | - N. N. M. Zain
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, 13200 Bertam, Pulau Pinang, Malaysia
| | - V. Lim
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, 13200 Bertam, Pulau Pinang, Malaysia
| | - M. Raoov
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
- Universiti Malaya Centre for Ionic Liquids (UMCIL), Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
- Author for correspondence: M. Raoov e-mail:
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Synthetic biology toolkits and applications in Saccharomyces cerevisiae. Biotechnol Adv 2018; 36:1870-1881. [PMID: 30031049 DOI: 10.1016/j.biotechadv.2018.07.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 07/10/2018] [Accepted: 07/16/2018] [Indexed: 12/26/2022]
Abstract
Synthetic biologists construct biological components and systems to look into biological phenomena and drive a myriad of practical applications that aim to tackle current global challenges in energy, healthcare and the environment. While most tools have been established in bacteria, particularly Escherichia coli, recent years have seen parallel developments in the model yeast strain Saccharomyces cerevisiae, one of the most well-understood eukaryotic biological system. Here, we outline the latest advances in yeast synthetic biology tools based on a framework of abstraction hierarchies of parts, circuits and genomes. In brief, the creation and characterization of biological parts are explored at the transcriptional, translational and post-translational levels. Using characterized parts as building block units, the designing of functional circuits is elaborated with examples. In addition, the status and potential applications of synthetic genomes as a genome level platform for biological system construction are also discussed. In addition to the development of a toolkit, we describe how those tools have been applied in the areas of drug production and screening, study of disease mechanisms, pollutant sensing and bioremediation. Finally, we provide a future outlook of yeast as a workhorse of eukaryotic genetics and a chosen chassis in this field.
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Abdulhady YAM, El-Shazly MM, El-Kased RF. Evaluation of antibacterial activity and toxic metal removal of chemically synthesized magnetic iron oxide titanium coated nanoparticles and application in bacterial treatment. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2018; 53:205-212. [PMID: 29148917 DOI: 10.1080/10934529.2017.1387012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Co-precipitation method was used for preparation of two types of iron oxide nanoparticles coated by titanium dioxide according to divalent salts used. The average size of iron oxide nanoparticles coated by titanium dioxide measured by particle size analyzer, ranged approximately between 20 nm and 100 nm with mean particle size of 60 nm. Characterization of the prepared nanoparticles was done by X-ray diffraction analysis and scanning electron microscope indicating the sole existence of inverse cubic spinel phase of magnetic iron oxide nanoparticles. Further, the antibacterial activity of two prepared iron oxide nanoparticles was evaluated against four pathogenic bacteria where both preparations showed promising antibacterial activities against Gram positive and Gram negative strains which offers a potential application in pharmaceutical and biomedical industries. The antibacterial activity showed high reduction percent after 30 min by 150 μg mL-1 of nanoparticles prepared. Also, high reduction percent was achieved for removal of iron and manganese ions from polluted water and good effect on decreasing chemical oxygen demand and biochemical oxygen demand concentrations with decreased percent of total nitrogen concentration.
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Affiliation(s)
| | - Mona M El-Shazly
- b Soil Fertility and Microbiology Dept. , Desert Research Center , Cairo , Egypt
| | - Reham F El-Kased
- c Faculty of Pharmacy, Microbiology & Immunology, The British University in Egypt , Cairo , Egypt
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Biotechnological applications of nanomaterials for air pollution and water/wastewater treatment. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.matpr.2018.04.162] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Uddin I, Ahmad K, Khan AA, Kazmi MA. Synthesis of silver nanoparticles using Matricaria recutita (Babunah) plant extract and its study as mercury ions sensor. SENSING AND BIO-SENSING RESEARCH 2017. [DOI: 10.1016/j.sbsr.2017.11.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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40
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Mufti N, Arista D, Diantoro M, Fuad A, Taufiq A, Sunaryono. The Effect of Thickness of ZnO Thin Films on Hydrophobic Self-Cleaning Properties. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1757-899x/202/1/012006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Gonzalez-Perez A, Persson KM. Bioinspired Materials for Water Purification. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E447. [PMID: 28773569 PMCID: PMC5456750 DOI: 10.3390/ma9060447] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 05/30/2016] [Accepted: 05/31/2016] [Indexed: 01/08/2023]
Abstract
Water scarcity issues associated with inadequate access to clean water and sanitation is a ubiquitous problem occurring globally. Addressing future challenges will require a combination of new technological development in water purification and environmental remediation technology with suitable conservation policies. In this scenario, new bioinspired materials will play a pivotal role in the development of more efficient and environmentally friendly solutions. The role of amphiphilic self-assembly on the fabrication of new biomimetic membranes for membrane separation like reverse osmosis is emphasized. Mesoporous support materials for semiconductor growth in the photocatalytic degradation of pollutants and new carriers for immobilization of bacteria in bioreactors are used in the removal and processing of different kind of water pollutants like heavy metals. Obstacles to improve and optimize the fabrication as well as a better understanding of their performance in small-scale and pilot purification systems need to be addressed. However, it is expected that these new biomimetic materials will find their way into the current water purification technologies to improve their purification/removal performance in a cost-effective and environmentally friendly way.
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Affiliation(s)
- Alfredo Gonzalez-Perez
- South Sweden Water Supply (Sydvatten AB), Skeppsgatan 19, Malmö SE-21119, Sweden.
- Sweden Water Research AB, Ideon Science Park, Scheelevägen 15, Lund SE-22370, Sweden.
- Membrane Biophysics, Niels Bohr Institute, Blegdamsvej 17, Copenhagen 2100, Denmark.
| | - Kenneth M Persson
- South Sweden Water Supply (Sydvatten AB), Skeppsgatan 19, Malmö SE-21119, Sweden.
- Sweden Water Research AB, Ideon Science Park, Scheelevägen 15, Lund SE-22370, Sweden.
- Department of Water Resources Engineering, Lund University, P.O. Box 118, Lund SE-22100, Sweden.
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Bateganya NL, Nakalanzi D, Babu M, Hein T. Buffering municipal wastewater pollution using urban wetlands in sub-Saharan Africa: a case of Masaka municipality, Uganda. ENVIRONMENTAL TECHNOLOGY 2015; 36:2149-2160. [PMID: 25719508 DOI: 10.1080/09593330.2015.1023363] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In many sub-Saharan Africa municipalities and cities, wastewater is discharged with limited or no treatment at all, thus creating public and environmental health risks. This study assessed the performance of a conventional municipal wastewater treatment plant (WWTP), based on effluent pollution flux, in Masaka Municipality, Uganda. Also, the downstream pollution attenuation through a natural wetland was analysed to ascertain its role in buffering the WWTP performance deficits. Generally, there was deficiency in WWTP performance, with 100% failure over a five-year assessment period, for example, the mean effluent biochemical oxygen demand (BOD)5 and chemical oxygen demand (COD) concentrations (mg l(-1)) were found to be 316 ± 15 and 582 ± 28 compared with 50 and 100 maximum permissible environment discharge limits, respectively. Despite these deficits in WWTP performance, the wetland buffer effectively reduced pollutant loads for suspended solids (73%), organic matter (BOD5, 88% and COD, 75%), nutrients (total nitrogen, 74% and total phosphorus, 83%) and pathogens (faecal coliforms, 99%). These findings underpin the challenge of managing municipal wastewater using centralized mechanical WWTPs in the region. However, the wetland buffer system demonstrated a critical role these ecosystems play in abating both pulse and intermittent pollution loads from urban environments of sub-Saharan Africa whose sanitation systems are defective and inadequate. Therefore, it was concluded that integrating wetland ecosystems in urban planning as natural landscape features to enhance municipal wastewater management and pollution control is paramount.
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Affiliation(s)
- Najib Lukooya Bateganya
- a Institute for Hydrobiology and Aquatic Ecosystem Management , University for Natural Resources and Life Sciences , Max Emanuel Str. 17, A-1180 Vienna , Austria
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Abstract
A variety of environmental applications documents the potential of composite MnCeOx materials as low-cost, multipurpose alternatives to noble-metal catalysts.
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Affiliation(s)
- Francesco Arena
- Dept. of Electronic Engineering
- Industrial Chemistry and Engineering
- University of Messina
- Messina, Italy
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