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Naeem B, Saleem J, Haider Naqvi ASA, Kausar S, Arshad A, Kumar K, Khalid A, Kumar P. Systematic review of clinical manifestations, management and outcome following accidental ingestion of liquid mosquito repellent vaporiser in children. BMJ Paediatr Open 2024; 8:e002476. [PMID: 38555100 PMCID: PMC10982783 DOI: 10.1136/bmjpo-2023-002476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 03/14/2024] [Indexed: 04/02/2024] Open
Abstract
BACKGROUND Pyrethroid-based mosquito repellents are widely used to control mosquito-borne diseases. Liquid mosquito-repellent vaporisers are effective modes of pyrethroid delivery but can also pose significant health risks if ingested or used improperly. OBJECTIVE This systematic review was performed to assess the demographic distribution, clinical presentation, management strategies and outcomes in children resulting from accidental ingestion of liquid mosquito repellent vaporiser. METHODS The study adheres to the reporting standards outlined in the PRISMA Statement for Systematic Reviews and was prospectively registered with PROSPERO (record # CRD42023413937) to enhance transparency and minimise reporting bias. A comprehensive search was conducted on PubMed, Scopus and Google Scholar using specific MeSH terms related to insecticides, mosquito repellents, pyrethroids, ingestion, poisoning, toxicity and prevention. The reference lists of the included studies were also reviewed for additional relevant articles. The inclusion criteria involved studies published in peer-reviewed journals between 2000 and 2023 that focused on children under 18 years old with a history of mosquito-repellent ingestion based on primary data. RESULTS Twelve studies met the inclusion criteria; these were primarily case reports from India, China and the UAE. Male children were predominantly affected, and symptoms included vomiting, convulsions, cough and respiratory distress. Management primarily involved supportive and symptomatic measures, including atropine for salivation and antiepileptic drugs for seizures. Respiratory support was provided for respiratory complications. CONCLUSION Despite the known risks and diverse presentations of pyrethroid poisoning caused by liquid mosquito repellent vaporiser in children, the limited substantial evidence in the literature underscores the urgent need for comprehensive research to refine management approaches and enhance preventive measures.
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Affiliation(s)
- Babar Naeem
- Allama Iqbal Medical College, Lahore, Pakistan
| | - Junaid Saleem
- Federal Medical and Dental College, Islamabad, Pakistan
| | | | - Sidra Kausar
- Pakistan Institute of Medical Sciences, Islamabad, Pakistan
| | - Aqdas Arshad
- Mohi-ud-Din Islamic Medical College, Mirpur, Azad Kashmir, Pakistan
| | | | - Aashar Khalid
- Federal Medical and Dental College, Islamabad, Pakistan
| | - Parkash Kumar
- Liaquat National Hospital and Medical College, Karachi, Pakistan
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Saleem J, Moghal ZKB, McKay G. Transforming polypropylene waste into transparent anti-corrosion weather-resistant and anti-bacterial superhydrophobic films. J Hazard Mater 2024; 466:133597. [PMID: 38310836 DOI: 10.1016/j.jhazmat.2024.133597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 01/18/2024] [Accepted: 01/20/2024] [Indexed: 02/06/2024]
Abstract
The global pollution crisis arising from the accumulation of plastic in landfills and the environment necessitates addressing plastic waste issues. Notably, polypropylene (PP) waste accounts for 20% of total plastic waste and holds promise for hydrophobic applications in the realm of recycling. Herein, the transparent and non-transparent superhydrophobic films made from waste PP are reported. A hierarchical structure with protrusions is induced through spin-casting and thermally induced phase separation. The films had a water contact angle of 159° and could vary in thickness, strength, roughness, and hydrophobicity depending on end-user requirements. The Bode plot indicated enhanced corrosion resistance in the superhydrophobic films. Antibacterial trials with Escherichia coli and Staphylococcus aureus microbial solutions showed that the superhydrophobic film had a significantly lower rate of colony-forming units compared to both the transparent surface and the control blank sample. Moreover, a life cycle assessment revealed that the film production resulted in a 62% lower embodied energy and 34% lower carbon footprint compared to virgin PP pellets sourced from petroleum. These films exhibit distinctiveness with their dual functionality as coatings and freestanding films. Unlike conventional coatings that require chemical application onto the substrate, these films can be mechanically applied using adhesive tapes on a variety of surfaces. Overall, the effective recycling of waste PP into versatile superhydrophobic films not only reduces environmental impact but also paves the way for a more sustainable and eco-friendly future.
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Affiliation(s)
- Junaid Saleem
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar.
| | | | - Gordon McKay
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
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Saleem J, Guevel B, Gillott E, Mitchell C, Widjono A, Qavi A, Domos P. Radiological analysis and outcomes of isolated greater tuberosity fracture-dislocations. Ann R Coll Surg Engl 2024; 106:270-276. [PMID: 37609692 PMCID: PMC10904254 DOI: 10.1308/rcsann.2023.0019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/07/2023] [Indexed: 08/24/2023] Open
Abstract
BACKGROUND The purpose of this study was to investigate different radiological characteristics for isolated greater tuberosity (GT) fracture-dislocations and their effects on complication and reoperation rates. METHODS A two-centre, retrospective study was performed on patients with a minimum 1-year follow-up (median 4.5 years). Patients were split into two groups, Group A (<65 years old) and Group B (≥65 years old). Outcomes included initial injury characteristics (dislocation and fracture type, AC/BC ratio and distances), the reduction environment and postreduction outcomes including complications. RESULTS A total of 55 patients were included in this study, with a reduction in the emergency department (ED) performed in 93% of patients. Complication rates (47% overall) were similar in both groups, with an overall nonunion rate of 27%. No nonunions occurred in fractures reduced in theatre compared with 29% occurring in reductions in ED (p<0.001); 11% of patients experienced surgical neck fractures, the majority of which were in Group B (p=0.003). A larger fracture fragment (i.e. higher AC/BC or AC distances) was correlated with a higher incidence of nonunion in Group B compared with Group A (p=0.003), and a higher risk of stiffness in both groups (p=0.049); 16% of patients demonstrated delayed displacement of their GT. CONCLUSIONS This study highlights the high complication rates associated with these injuries. Age and specific radiological parameters should be taken into consideration when risk stratifying, as should reducing these fractures in a theatre setting. Interval radiographs are also advised to monitor GT displacement for at least 2-3 weeks.
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Affiliation(s)
- J Saleem
- Royal Free NHS Foundation Trust, UK
| | - B Guevel
- Royal Free NHS Foundation Trust, UK
| | | | | | | | - A Qavi
- Imperial College London,UK
| | - P Domos
- Royal Free NHS Foundation Trust, UK
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Saleem J, Moghal ZKB, McKay G. 3D Oleophilic Sorbent Films Based on Recycled Low-Density Polyethylene. Polymers (Basel) 2023; 16:135. [PMID: 38201800 PMCID: PMC10780981 DOI: 10.3390/polym16010135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 12/03/2023] [Accepted: 12/14/2023] [Indexed: 01/12/2024] Open
Abstract
Recycling low-end, one-time-use plastics-such as low-density polyethylene (LDPE)-is of paramount importance to combat plastic pollution and promote sustainability in the modern green economy. This study valorizes LDPE waste by transforming it into 3D oleophilic swellable thin films through a process involving dissolution, phase separation, and extraction. These films are subsequently layered using a customized polypropylene (PP) based nonwoven fabric separator and securely sealed in a zigzag pattern. The zigzag-shaped seal enhances the adhesion of pollutants to the sorbent by providing wire curvatures that increase retention time and uptake capacity. As a result, the sorbent exhibits impressive oil uptake capacities, with immediate and equilibrium values of 120 g/g and 85 g/g, respectively. Notably, the as-prepared sorbent demonstrates low water retention and high selectivity for oil, outperforming commercially available oil sorbents. The unique design involving a 3D-film structure, superposed films, and a zigzag-shaped seal offers a sustainable and value-added solution to the issues of LDPE waste and oil spills on water surfaces.
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Affiliation(s)
- Junaid Saleem
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha 34110, Qatar;
| | | | - Gordon McKay
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha 34110, Qatar;
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Saleem J, Moghal ZKB, McKay G. Designing super-fast trimodal sponges using recycled polypropylene for organics cleanup. Sci Rep 2023; 13:14163. [PMID: 37644209 PMCID: PMC10465528 DOI: 10.1038/s41598-023-41506-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 08/28/2023] [Indexed: 08/31/2023] Open
Abstract
Sorbent pads and films have been commonly used for environmental remediation purposes, but designing their internal structure to optimize access to the entire volume while ensuring cost-effectiveness, ease of fabrication, sufficient strength, and reusability remains challenging. Herein, we report a trimodal sorbent film from recycled polypropylene (PP) with micropores, macro-voids, and sponge-like 3D cavities, developed through selective dissolution, thermally induced phase separation, and annealing. The sorbent has hundreds of cavities per cm2 that are capable of swelling up to twenty-five times its thickness, allowing for super-fast saturation kinetics (within 30 s) and maximum oil sorption (97 g/g). The sorption mechanism follows a pseudo-second-order kinetic model. Moreover, the sorbent is easily compressible, and its structure is retained during oil sorption, desorption, and resorption, resulting in 96.5% reuse efficiency. The oil recovery process involves manually squeezing the film, making the cleanup process efficient with no chemical treatment required. The sorbent film possesses high porosity for effective sorption with sufficient tensile strength for practical applications. Our integrated technique results in a strengthened porous polymeric structure that can be tailored according to end-use applications. This study provides a sustainable solution for waste management that offers versatility in its functionality.
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Affiliation(s)
- Junaid Saleem
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar.
| | | | - Gordon McKay
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
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Saleem J, Moghal ZKB, Shakoor RA, McKay G. Sustainable Solution for Plastic Pollution: Upcycling Waste Polypropylene Masks for Effective Oil-Spill Management. Int J Mol Sci 2023; 24:12368. [PMID: 37569746 PMCID: PMC10419313 DOI: 10.3390/ijms241512368] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/27/2023] [Accepted: 07/28/2023] [Indexed: 08/13/2023] Open
Abstract
The use of Polypropylene PP in disposable items such as face masks, gloves, and personal protective equipment has increased exponentially during and after the COVID-19 pandemic, contributing significantly to microplastics and nanoplastics in the environment. Upcycling of waste PP provides a useful alternative to traditional thermal and mechanical recycling techniques. It transforms waste PP into useful products, minimizing its impact on the environment. Herein, we synthesized an oil-sorbent pouch using waste PP, which comprises superposed microporous and fibrous thin films of PP using spin coating. The pouch exhibited super-fast uptake kinetics and reached its saturation in fewer than five minutes with a high oil uptake value of 85 g/g. Moreover, it displayed high reusability and was found to be effective in absorbing oil up to seven times when mechanically squeezed between each cycle, demonstrating robust oil-sorption capabilities. This approach offers a potential solution for managing plastic waste while promoting a circular economy.
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Affiliation(s)
- Junaid Saleem
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha P.O. Box 34110, Qatar;
| | | | - Rana Abdul Shakoor
- Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, Qatar; (Z.K.B.M.); (R.A.S.)
| | - Gordon McKay
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha P.O. Box 34110, Qatar;
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Saleem J, Moghal ZKB, Shakoor RA, Luyt AS, McKay G. Non-Wettable Microporous Sheets Using Mixed Polyolefin Waste for Oil-Water Separation. Polymers (Basel) 2023; 15:3072. [PMID: 37514461 PMCID: PMC10385071 DOI: 10.3390/polym15143072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 07/14/2023] [Accepted: 07/15/2023] [Indexed: 07/30/2023] Open
Abstract
Mixed polyolefin-based waste needs urgent attention to mitigate its negative impact on the environment. The separation of these plastics requires energy-intensive processes due to their similar densities. Additionally, these materials cannot be blended without compatibilizers, as they are inherently incompatible and immiscible. Herein, non-wettable microporous sheets from recycled polyethylene (PE) and polypropylene (PP) are presented. The methodology involves the application of phase separation and spin-casting techniques to obtain a bimodal porous structure, facilitating efficient oil-water separation. The resulting sheets have an immediate and equilibrium sorption uptake of 100 and 55 g/g, respectively, due to the presence of micro- and macro-pores, as revealed by SEM. Moreover, sheets possess enhanced crystallinity, as evidenced by XRD; hence, they retain their structure during sorption and desorption and are reusable with 98% efficiency. The anti-wetting properties of the sheets are enhanced by applying a silane coating, ensuring waterless sorption and a contact angle of 140°. These results highlight the importance of implementing sustainable solutions to recycle plastics and mitigate the oil spill problem.
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Affiliation(s)
- Junaid Saleem
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha P.O. Box 2713, Qatar
| | | | - Rana A Shakoor
- Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, Qatar
| | - Adriaan S Luyt
- Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, Qatar
| | - Gordon McKay
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha P.O. Box 2713, Qatar
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Saleem J, Moghal ZKB, McKay G. Up-cycling plastic waste into swellable super-sorbents. J Hazard Mater 2023; 453:131356. [PMID: 37084516 DOI: 10.1016/j.jhazmat.2023.131356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/22/2023] [Accepted: 04/02/2023] [Indexed: 05/03/2023]
Abstract
Environmental pollution caused by plastic waste and oil spills has emerged as a major concern in recent years. Consequently, there has been a growing interest in exploring innovative solutions to address these challenges. Herein, we report a method to upcycle polyolefins-based plastic waste by converting it into a bimodal super-oleophilic sorbent using dissolution, spin-coating, and annealing techniques. The resulting sorbent possesses an extensive network of pores and cavities with a size range from 0.5 to 5 µm and 150-200 µm, respectively, with an average of 600 cavities per cm2. Each cavity can swell up to twenty times the thickness of the sorbent, exhibiting sponge-like behavior. The sorbent had an oil uptake capacity of 70-140 g/g, depending on the type of sorbate and dripping time. Moreover, the sorbent can be mechanically or manually squeezed to recover the sorbed oil. Our integrated methodology provides a promising approach to upcycling plastic waste as an abundant source of value-added materials.
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Affiliation(s)
- Junaid Saleem
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar.
| | | | - Gordon McKay
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
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Hossain SS, Ahmad Alwi MM, Saleem J, Al-Odail F, Basu A, Mozahar Hossain M. Recent Advances in Anode Electrocatalysts for Direct Formic Acid Fuel Cell-II-Platinum-Based Catalysts. CHEM REC 2022; 22:e202200156. [PMID: 36073789 DOI: 10.1002/tcr.202200156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 08/19/2022] [Indexed: 12/14/2022]
Abstract
Platinum-based catalysts have a long history of application in formic acid oxidation (FAO). The single metal Pt is active in FAO but expensive, scarce, and rapidly deactivates. Understanding the mechanism of FAO over Pt important for the rational design of catalysts. Pt nanomaterials rapidly deactivate because of the CO poisoning of Pt active sites via the dehydration pathway. Alloying with another transition metal improves the performance of Pt-based catalysts through bifunctional, ensemble, and steric effects. Supporting Pt catalysts on a high-surface-area support material is another technique to improve their overall catalytic activity. This review summarizes recent findings on the mechanism of FAO over Pt and Pt-based alloy catalysts. It also summarizes and analyzes binary and ternary Pt-based catalysts to understand their catalytic activity and structure relationship.
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Affiliation(s)
- Sk Safdar Hossain
- Department of Chemical Engineering, College of Engineering, King Faisal University, Al-Ahsa, 31982, Kingdom of Saudi Arabia
| | - Muhammad Mudassir Ahmad Alwi
- Department of Materials Engineering, College of Engineering, King Faisal University, Al-Ahsa, 31982, Kingdom of Saudi Arabia
| | - Junaid Saleem
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Faisal Al-Odail
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa, 31982, Kingdom of Saudi Arabia
| | - Avijit Basu
- Department of Chemical Engineering, College of Engineering, King Faisal University, Al-Ahsa, 31982, Kingdom of Saudi Arabia
| | - Mohammad Mozahar Hossain
- Department of Chemical Engineering, College of Engineering, King Fahd University of Petroleum & Minerals, Dhahran, 31612, Kingdom of Saudi Arabia
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Saleem J, Baig MZK, Luyt AS, Shakoor RA, Mansour S, McKay G. Reusable Macroporous Oil Sorbent Films from Plastic Wastes. Polymers (Basel) 2022; 14:polym14224867. [PMID: 36432992 PMCID: PMC9699559 DOI: 10.3390/polym14224867] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 11/02/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022] Open
Abstract
Plastic waste comprises 15% of the total municipal solid waste and can be a rich source for producing value-added materials. Among them, polyethylene (PE) and polypropylene (PP) account for 60% of the total plastic waste, mainly due to their low-end and one-time-use applications. Herein, we report reusable oil sorbent films made by upcycling waste PE and PP. The as-prepared oil sorbent had an uptake capacity of 55 g/g. SEM analysis revealed a macroporous structure with a pore size range of 1-10 µm, which facilitates oil sorption. Similarly, the contact angle values reflected the oleophilic nature of the sorbent. Moreover, thermal properties and crystallinity were examined using DSC, while mechanical properties were calculated using tensile testing. Lastly, 95% of the sorbed oil could be easily recovered by squeezing mechanically or manually.
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Affiliation(s)
- Junaid Saleem
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Doha P.O. Box 34110, Qatar
- Correspondence:
| | | | | | - Rana Abdul Shakoor
- Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, Qatar
| | - Said Mansour
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University, Doha P.O. Box 34110, Qatar
| | - Gordon McKay
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Doha P.O. Box 34110, Qatar
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Safdar Hossain SK, Saleem J, Mudassir Ahmad Alwi M, Al-Odail FA, Mozahar Hossain M. Recent Advances in Anode Electrocatalysts for Direct Formic Acid Fuel Cells - Part I - Fundamentals and Pd Based Catalysts. CHEM REC 2022; 22:e202200045. [PMID: 35733082 DOI: 10.1002/tcr.202200045] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/25/2022] [Indexed: 11/11/2022]
Abstract
Direct formic acid fuel cells (DFAFCs) have gained immense importance as a source of clean energy for portable electronic devices. It outperforms other fuel cells in several key operational and safety parameters. However, slow kinetics of the formic acid oxidation at the anode remains the main obstacle in achieving a high power output in DFAFCs. Noble metal-based electrocatalysts are effective, but are expensive and prone to CO poisoning. Recently, a substantial volume of research work have been dedicated to develop inexpensive, high activity and long lasting electrocatalysts. Herein, recent advances in the development of anode electrocatalysts for DFAFCs are presented focusing on understanding the relationship between activity and structure. This review covers the literature related to the electrocatalysts based on noble metals, non-noble metals, metal-oxides, synthesis route, support material, and fuel cell performance. The future prospects and bottlenecks in the field are also discussed at the end.
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Affiliation(s)
- S K Safdar Hossain
- Department of Chemical Engineering, College of Engineering, King Faisal University, Al-Ahsa, 31982, Kingdom of Saudi Arabia
| | - Junaid Saleem
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - M Mudassir Ahmad Alwi
- Department of Materials Engineering, College of Engineering, King Faisal University, Al-Ahsa, 31982, Kingdom of Saudi Arabia
| | - Faisal A Al-Odail
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa, 31982, Kingdom of Saudi Arabia
| | - Mohammad Mozahar Hossain
- Department of Chemical Engineering, College of Engineering, King Fahd University of Petroleum & Minerals, Dhahran, 31612, Kingdom of Saudi Arabia
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Oliveira LMTM, Saleem J, Bazargan A, Duarte JLDS, McKay G, Meili L. Sorption as a rapidly response for oil spill accidents: A material and mechanistic approach. J Hazard Mater 2021; 407:124842. [PMID: 33412364 DOI: 10.1016/j.jhazmat.2020.124842] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 12/07/2020] [Accepted: 12/10/2020] [Indexed: 06/12/2023]
Abstract
Accidents involving oil transportation has increase due to directly connection with the elevation of global energy demand. The environmental losses are tremendous and brings huge economic issues to remediate the spilled oil. This report presents an up-to-date review on an overall aspects of oil spill remediation techniques, the fundamentals and advantages of sorption, the most applied materials through diverse types of oil spill sites and oils with variety features, highlight to natural materials and future prospective. As the environment preservation progressively becomes a major social concern issue, the achievement of a worldwide distribution process aligned with environmental legislation and economic viability is crucial to the oil industry. For this, a specific preparation considering several scenarios must be carried out regarding minimization of oil spillages. Since the sorbent materials are decisive for sorption, it was approached the main sorbents: natural, graphenic, nano, polymeric and waste materials, and future trends.
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Affiliation(s)
- Leonardo M T M Oliveira
- Laboratório de Processos, Centro de Tecnologia, Universidade Federal de Alagoas, Maceió, AL, Brazil
| | - Junaid Saleem
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Education City, Qatar Foundation, Doha, Qatar
| | - Alireza Bazargan
- School of Environment, College of Engineering, University of Tehran, Iran
| | - José Leandro da S Duarte
- Laboratório de Processos, Centro de Tecnologia, Universidade Federal de Alagoas, Maceió, AL, Brazil.
| | - Gordon McKay
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Education City, Qatar Foundation, Doha, Qatar
| | - Lucas Meili
- Laboratório de Processos, Centro de Tecnologia, Universidade Federal de Alagoas, Maceió, AL, Brazil.
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Meraj L, Saleem J, Manzoor S, Ashfaq A, Khurram M. First report of Chikungunya fever in Rawalpindi, Pakistan. East Mediterr Health J 2020; 26:744-747. [PMID: 32621511 DOI: 10.26719/emhj.19.095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 02/14/2019] [Indexed: 11/09/2022]
Abstract
Background Chikungunya shares many clinical features with dengue fever, but to date, no case has been reported in Rawalpindi and surrounding areas. Aims To detect the presence in Rawalpindi of chikungunya masquerading as dengue fever. Methods An observational study was conducted at Rawalpindi Medical University from July to December 2017. Patients with clinical features suggestive of dengue fever, but negative for dengue virus NS1 antigen were included and tested at the National Institute of Health Islamabad, Pakistan, for chikungunya using reverse transcription polymerase chain reaction. Results We tested 129 patients and 28 were positive for chikungunya. There were 17 (60.7%) men and 11 (39.3%) women, with a mean age of 32.53 years (range 16-60 years). All had fever at presentation. Other clinical features at presentation were noted, such as fever, chills, fatigue, headache, myalgia, arthralgia, retro-orbital pain, abdominal pain, nausea, and diarrhoea. No long-term sequelae or bleeding diatheses were seen and there was no mortality reported. Conclusions The clinical features observed and investigated confirmed our reporting of the first case of chikungunya in Rawalpindi, Pakistan.
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Affiliation(s)
- Lubna Meraj
- Department of Medicine, District Headquarter Hospital Rawalpindi, Rawalpindi Medical University, Rawalpindi, Pakistan
| | - Junaid Saleem
- Department of Medicine, Hearts International (Pvt) Hospital, affiliated with Islamic International Medical College, Rawalpindi, Pakistan
| | - Shahzad Manzoor
- Department of Medicine, District Headquarter Hospital Rawalpindi, Rawalpindi Medical University, Rawalpindi, Pakistan
| | - Asfaa Ashfaq
- Department of Medicine, District Headquarter Hospital Rawalpindi, Rawalpindi Medical University, Rawalpindi, Pakistan
| | - Mohammad Khurram
- Department of Medicine, Benazir Bhutto Hospital, Rawalpindi Medical University, Rawalpindi, Pakistan
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Wang Z, Saleem J, Barford JP, McKay G. Preparation and characterization of modified rice husks by biological delignification and acetylation for oil spill cleanup. Environ Technol 2020; 41:1980-1991. [PMID: 30516089 DOI: 10.1080/09593330.2018.1552725] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 11/19/2018] [Indexed: 06/09/2023]
Abstract
Cellulose is widely used as an effective sorbent to treat wastewater. Cellulosic sorbents have the advantage of biodegradability, as they are natural plant-based materials, compared with the synthetic materials such as polypropylene (PP) or polyurethane (PU). Among the raw biomass materials used for cellulose production, rice husk is one of the most cost competitive and widely available. In this work, biological treatments are compared to find the most effective treatment method for cellulose fibre production from rice husk. Using biological delignification, cellulose was extracted from raw rice husk and acetylated to acquire hydrophobicity. Delignification was performed using both bacteria and fungi and their results were compared. The white-rot fungi strain using 'Aspergillus flavus CICC 40258' was found to be the most effective treatment method, achieving a modified product with up to 55% w/w cellulose concentration. Acetylation further facilitated the sorption process and the maximum oil uptake capacity using delignification and acetylation treatment was found to be 20 g/g. The as-prepared sorbents exhibited high oil uptake rates and saturation capacity was reached after 5 min of contact with oil. The kinetic study presents a good correlation with the pseudo-second order model. The isothermal studies demonstrated that the oil sorption capacity of rice husk follows the Langmuir model as compared with the Freundlich model.
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Affiliation(s)
- Zhixuan Wang
- Department of Chemical Engineering, Imperial College London, London, UK
| | - Junaid Saleem
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Doha, Qatar
| | - John P Barford
- Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
| | - Gordon McKay
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Doha, Qatar
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Saleem J, Adil Riaz M, Gordon M. Oil sorbents from plastic wastes and polymers: A review. J Hazard Mater 2018; 341:424-437. [PMID: 28818816 DOI: 10.1016/j.jhazmat.2017.07.072] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 07/05/2017] [Accepted: 07/31/2017] [Indexed: 06/07/2023]
Abstract
A large volume of the waste produced across the world is composed of polymers from plastic wastes such as polyethylene (HDPE or LDPE), polypropylene (PP), and polyethylene terephthalate (PET) amongst others. For years, environmentalists have been looking for various ways to overcome the problems of such large quantities of plastic wastes being disposed of into landfill sites. On the other hand, the usage of synthetic polymers as oil sorbents in particular, polyolefins, including polypropylene (PP) and polyethylene (PE) have been reported. In recent years, the idea of using plastic wastes as the feed for the production of oil sorbents has gained momentum. However, the studies undertaking such feasibility are rather scattered. This review paper is the first of its kind reporting, compiling and reviewing these various processes. The production of an oil sorbent from plastic wastes is being seen to be satisfactorily achievable through a variety of methods Nevertheless, much work needs to be done regarding further investigation of the numerous parameters influencing production yields and sorbent qualities. For example, differences in results are seen due to varying operating conditions, experimental setups, and virgin or waste plastics being used as feeds. The field of producing oil sorbents from plastic wastes is still very open for further research, and seems to be a promising route for both waste reduction, and the synthesis of value-added products such as oil sorbents. In this review, the research related to the production of various oil sorbents based on plastics (plastic waste and virgin polymer) has been discussed. Further oil sorbent efficiency in terms of oil sorption capacity has been described.
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Affiliation(s)
- Junaid Saleem
- Division of Sustainability, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar; HEJ Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan.
| | - Muhammad Adil Riaz
- School of Chemical and Biomolecular Engineering, The University of Sydney, NSW 2006, Australia
| | - McKay Gordon
- Division of Sustainability, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
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Riaz MA, McKay G, Saleem J. 3D graphene-based nanostructured materials as sorbents for cleaning oil spills and for the removal of dyes and miscellaneous pollutants present in water. Environ Sci Pollut Res Int 2017; 24:27731-27745. [PMID: 29098585 DOI: 10.1007/s11356-017-0606-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 10/24/2017] [Indexed: 06/07/2023]
Abstract
Oil spills over seawater and dye pollutants in water cause economic and environmental damage every year. Among various methods to deal oil spill problems, the use of porous materials has been proven as an effective strategy. In recent years, graphene-based porous sorbents have been synthesized to address the shortcomings associated with conventional sorbents such as their low uptake capacity, slow sorption rate, and non-recyclability. This article reviews the research undertaken to control oil spillage using three-dimensional (3D) graphene-based materials. The use of these materials for removal of dyes and miscellaneous environmental pollutants from water is explored and the application of various multifunctional 3D oil sorbents synthesized by surface modification technique is presented. The future prospects and limitations of these materials as sorbents are also discussed.
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Affiliation(s)
- Muhammad Adil Riaz
- Department of Chemical & Biomolecular Engineering, Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Gordon McKay
- Division of Sustainability, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Junaid Saleem
- Division of Sustainability, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar.
- HEJ Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan.
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Affiliation(s)
- Junaid Saleem
- Department of Chemical Engineering; University of Karachi; Karachi Pakistan
| | - Gordon McKay
- Department of Chemical and Biomolecular Engineering; Hong Kong University of Science and Technology; Kowloon Hong Kong
- Division of Sustainable Development, College of Science, Engineering and Technology; Hamad Bin Khalifa University, Qatar Foundation; Doha Qatar
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Saleem J, Ning C, Barford J, McKay G. Combating oil spill problem using plastic waste. Waste Manag 2015; 44:34-38. [PMID: 26105077 DOI: 10.1016/j.wasman.2015.06.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Revised: 04/23/2015] [Accepted: 06/03/2015] [Indexed: 06/04/2023]
Abstract
Thermoplastic polymers (such as polypropylene, polyethylene, polyethylene terephthalate (PET) and high density polyethylene (HDPE)) constitute 5-15% of municipal solid waste produced across the world. A huge quantity of plastic waste is disposed of each year and is mostly either discarded in landfills or incinerated. On the other hand, the usage of synthetic polymers as oil sorbents, in particular, polyolefins, including polypropylene (PP), and polyethylene (PE) are the most commonly used oil sorbent materials mainly due to their low cost. However, they possess relatively low oil absorption capacities. In this work, we provide an innovative way to produce a value-added product such as oil-sorbent film with high practical oil uptake values in terms of g/g from waste HDPE bottles for rapid oil spill remedy.
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Affiliation(s)
- Junaid Saleem
- Department of Chemical Engineering, University of Karachi, Pakistan.
| | - Chao Ning
- Department of Chemical and Biomolecular Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - John Barford
- Department of Chemical and Biomolecular Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Gordon McKay
- Department of Chemical and Biomolecular Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong; Division of Sustainable Development, College of Science, Engineering and Technology, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
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Affiliation(s)
- Junaid Saleem
- Department of Chemical and Biomolecular Engineering; Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong
| | - Alireza Bazargan
- Department of Chemical and Biomolecular Engineering; Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong
| | - John Barford
- Department of Chemical and Biomolecular Engineering; Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong
| | - Gordon McKay
- Department of Chemical and Biomolecular Engineering; Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong
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Raza N, Saleem J, Rashid Dar N, Malik NA. Why dermatology patients are hospitalized? A study from Pakistan. Acta Dermatovenerol Croat 2009; 17:113-117. [PMID: 19595267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In most countries, there are no specified protocols or guidelines for admitting dermatology patients and admission criteria depend on assessment and sometimes the whim of the dermatologist. Although the severity and extent of the disease are the commonest reasons for hospitalizing dermatology patients, sometimes other factors also operate to provide comfort to the patient. This study was carried out to determine the reasons for hospitalizing patients on dermatology beds in secondary care hospitals of Pakistan. A questionnaire comprising patients' demographic data, diagnosis, specific reasons for hospitalization and length of hospital stay was sent to dermatologists of 10 secondary care hospitals in the country. The data received in response were processed and analyzed using the SPSS-10 computer program. A total of 310 patients were included in the study. Patient age ranged from 1 to 87, mean 28.87+/-12.32 years. The severity and extent of the disease (n=122; 39.3%), outpatient treatment failure (n=57; 18.4%) and need for further observation and/or investigations (n=51; 16.5%) were the most common reasons for hospitalizing these patients. Hospital stay of the patients ranged from 2 to 30, mean 9.82+/- 6.43 days. Scabies (n=56; 18.1%), chickenpox (n=52; 16.8%) and eczema (n=41; 13.2%) were the most common diagnoses.
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Saleem J, Usman M, Nadeem A, Sethi SA, Salman M. Crimean-Congo hemorrhagic fever: a first case from Abbottabad, Pakistan. Int J Infect Dis 2008; 13:e121-3. [PMID: 19008137 DOI: 10.1016/j.ijid.2008.07.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2008] [Revised: 07/27/2008] [Accepted: 07/30/2008] [Indexed: 11/16/2022] Open
Abstract
Crimean-Congo hemorrhagic fever (CCHF) is a deadly viral disease that is endemic in some parts of Pakistan. We report here the first ever case of CCHF from Abbottabad. The patient presented with abdominal pain, hematemesis and low platelets, and died within 24hours of admission. The diagnosis was confirmed by PCR for the CCHF virus. Because of the aggressive infection-control measures adopted, secondary and nosocomial spread was prevented.
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Saleem J, Athar S. Incidence of postoperative sore throat and cough: comparison of a polyvinylchloride tube and an armoured tube. Crit Care 2008. [PMCID: PMC4088708 DOI: 10.1186/cc6558] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
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