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Yan D, Zhu Y, Zhao J, Zhang Q, Wang Y, Yang S. Synthesis and utilization of polyol-modified high specific surface area Ca(OH) 2: an investigation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:32714-32724. [PMID: 38662289 DOI: 10.1007/s11356-024-33390-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 04/16/2024] [Indexed: 04/26/2024]
Abstract
Calcium hydroxide (Ca(OH)2) finds widespread use in the petrochemical industry, particularly in flue gas desulfurization applications. However, its conventional usage is limited by its inherently low specific surface area, hampering its efficiency. To address this limitation, this study aims to develop a simple and industrially scalable preparation process for Ca(OH)2 with a high specific surface area, thereby enhancing its effectiveness in various applications. This study aimed to develop a preparation process for making Ca(OH)2 with a high specific surface area, suitable for industry and easy to make. Ca(OH)2 with a specific surface area of 41.555 m2/g was successfully synthesized by incorporating polyols during lime digestion. The prepared high specific surface area Ca(OH)2 is more than five times the specific surface area of ordinary Ca(OH)2. Incorporation of polyols within the lime digestion process induces a reduction in both Ca(OH)2 grain size and particle dimensions, concurrently amplifying the specific surface area and optimizing mass transfer efficiency. Specifically, the desulfurization breakthrough time for Ca(OH)2 subject to a 15% triethanolamine modification was notably extended to 879 s, surpassing the desulfurization breakthrough time of unaltered Ca(OH)2 by more than tenfold. Moreover, the modified Ca(OH)2 exhibited remarkable efficacy in neutralizing acidic wastewater. A new approach for the preparation of high-performance Ca(OH)2 is proposed in this study, which could facilitate the industrial production of Ca(OH)2 with high specific surface area.
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Affiliation(s)
- Dongjie Yan
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China.
| | - Yingping Zhu
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
| | - Jiaxuan Zhao
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
| | - Qian Zhang
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
| | - Yongping Wang
- Shaanxi Provincial Academy of Environmental Science, Xi'an, 710061, China
| | - Shengjiong Yang
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
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Mekonnen KD, Yesuf AY. OH-Impregnated Household Bleach-Making Sediments for the Catalysis of Waste Cooking Oil Transesterification: Parameter Optimization. ACS OMEGA 2024; 9:4613-4626. [PMID: 38313485 PMCID: PMC10832008 DOI: 10.1021/acsomega.3c07810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 12/22/2023] [Accepted: 01/08/2024] [Indexed: 02/06/2024]
Abstract
Industrial and academic societies have been bothered with the generation and subsequent management of residues settled out from household bleach, due to its corrosive properties. Therefore, the aim of this research was to introduce a NaOH-impregnated calcium-based solid catalyst from the aforementioned sediments for waste cooking oil transesterification. To prepare the catalyst (RC-ITB), the wet impregnation technique was followed and successfully characterized via X-ray diffraction (XRD), X-ray fluorescence(XRF), differential scanning calorimetry (DSC), Brunauer-Emmett-Teller (BET), Fourier transform infrared (FT-IR), and scanning electron microscopy (SEM) methods. The study findings suggested that RC-ITB has a BET surface area of 9.312 m2 g-1 and is largely made up of calcium with its compound forms such as carbonates, hydroxides, and oxides. The evaluation of pH values verified that RC-ITB is more alkaline (i.e., pH = 12.65) relative to its precursor RC (pH = 10.66), largely attributable to OH impregnation. To study the catalytic performance, three numeric factors with three levels of treatment were used, and their influences were analyzed through a response surface approach. Accordingly, the optimal yield of biodiesel was found to be 80.04% at a reaction temperature of 61 ± 2 °C, catalyst weight of 6.33 wt %, and a molar ratio of 23.94. Moreover, FTIR analysis verified that the glycerol part of triglycerides had been replaced with a methoxyl unit. Also, the fuel quality parameters of the FAME product were examined, including density, kinematic viscosity, acid value, density, cetane number, cloud point, saponification value, and pour point; all of these values fall within the ASTM D6751-accepted limits. Thus, the findings showed that the sediments of household bleach production could be a candidate source to explore heterogeneous basic catalysts.
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Affiliation(s)
- Kedir Derbie Mekonnen
- School of Mechanical and
Chemical Engineering, Kombolcha Institute of Technology, Wollo University, Wollo 208, Ethiopia
| | - Anwar Yimer Yesuf
- School of Mechanical and
Chemical Engineering, Kombolcha Institute of Technology, Wollo University, Wollo 208, Ethiopia
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Mohamed HRH, Farouk AH, Elbasiouni SH, Nasif KA, Safwat G, Diab A. Genotoxicity and oxidative stress induction by calcium hydroxide, calcium titanate or/and yttrium oxide nanoparticles in mice. Sci Rep 2023; 13:19633. [PMID: 37949924 PMCID: PMC10638389 DOI: 10.1038/s41598-023-46522-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 11/02/2023] [Indexed: 11/12/2023] Open
Abstract
Intensive uses of Calcium hydroxide (Ca(OH)2NPs), calcium titanate (CaTiO3NPs) and yttrium oxide (Y2O3NPs) nanoparticles increase their environmental release and human exposure separately or together through contaminated air, water and food. However, too limited data are available on their genotoxicity. Therefore, this study explored the effect of Ca(OH)2NPs, CaTiO3NPs or/and Y2O3NPs administration on the genotoxicityand oxidative stress induction in mice hepatic tissue. Mice were orally administered Ca(OH)2NPs, CaTiO3NPs and Y2O3NPs separately or simultaneously together at a dose level of 50 mg/kg b.w. for two successive weeks (3 days per week). Marked induction of DNA damage noticed after oral administration of Ca(OH)2NPs or CaTiO3NPs alone together with high Ca(OH)2NPs induced reactive oxygen species (ROS) generation and a slight CaTiO3NPs induced ROS production were highly decreased after simultaneous coadministration of administration of Y2O3NPs with Ca(OH)2NPs and CaTiO3NPs up to the negative control level. Oral administration of Y2O3NPs alone also did not cause observable changes in the genomic DNA integrity and the ROS generation level compared to the negative control levels. Similarly, significant elevations in P53 gene expression and high reductions in Kras and HSP-70 genes expression were observed only after administration of Ca(OH)2NPs alone, while, remarkable increases in the Kras and HSP-70 genes expression and non-significant changes in p53 gene expression were noticed after administration of CaTiO3NPs and Y2O3NPs separately or simultaneously together with Ca(OH)2NPs. Conclusion: Ca(OH)2NPs exhibited the highest genotoxic effect through oxidative stress induction and disruption of apoptotic (p53 and Kras) and protective (HSP-70) genes expression. Slight DNA damage was noticed after CaTiO3NPs administration. However, administration of Y2O3NPs alone was non-genotoxic and coadministration of Y2O3NPs with Ca(OH)2NPs and CaTiO3NPs restored genomic DNA integrity and normal expression of apoptotic p53 and protective HSP-70 genes disrupted by Ca(OH)2NPs and CaTiO3NPs. Thus co-administration of Y2O3NPs with Ca(OH)2NPs and CaTiO3NPs is recommended to counter Ca(OH)2NPs and CaTiO3NPs induced genotoxicity and oxidative stress.
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Affiliation(s)
- Hanan R H Mohamed
- Zoology Department Faculty of Science, Cairo University, Giza, Egypt.
| | - Ahmed H Farouk
- Faculty of Biotechnology, October University for Modern Sciences and Arts, October City, Egypt
| | - Salma H Elbasiouni
- Faculty of Biotechnology, October University for Modern Sciences and Arts, October City, Egypt
| | - Kirolls A Nasif
- Faculty of Biotechnology, October University for Modern Sciences and Arts, October City, Egypt
| | - Gehan Safwat
- Faculty of Biotechnology, October University for Modern Sciences and Arts, October City, Egypt
| | - Ayman Diab
- Faculty of Biotechnology, October University for Modern Sciences and Arts, October City, Egypt
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Mekonnen KD, Hailemariam K. Valorization of calcium hypochlorite precipitate as a new source of heterogeneous catalyst development for biodiesel production: A preliminary experiment. Heliyon 2023; 9:e21959. [PMID: 38053885 PMCID: PMC10694178 DOI: 10.1016/j.heliyon.2023.e21959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 10/23/2023] [Accepted: 11/01/2023] [Indexed: 12/07/2023] Open
Abstract
One of the main problem related with liquid bleach production from calcium hypochlorite is the amount of precipitates generated and its consequent management. As a result, academic and industrial communities have been challenged with searching of a means for its valorization. Therefore, this research explores the application of the precipitate as a viable source of Ca-based heterogeneous catalyst development for the production of waste cooking oil methyl esters for the first-time. The catalyst was prepared by dividing the precipitates into three forms, viz. raw untreated (RC), heat treated (RC-TB), and NaOH impregnated plus thermally activated (RC-ITB). The prepared catalysts were efficiently characterized by XRF, XRD, FTIR, SEM, and BET techniques. The characterization results indicated that the catalysts are mainly composed of calcium metal in the form of oxides (CaO), calcite (CaCO3) and Portlandite (Ca(OH)2), which are the promising constituents of basic catalysts. The BET inspection of RC, RC-TB, and RC-ITB revealed the specific surface area of 8.509, 9.089, and 9.312 m2/g, respectively. At the same reaction conditions, the maximum biodiesel yield of 76.05 % was achieved by RC-ITB compared to RC-TB (62.57 %) and RC (19.74 %), because it's larger specific surface area and highest basic nature (pH = 12.65 at 1:5 w/v) improves the reaction catalysis through better catalyst-substrates interactions. The lower biodiesel yield was attained through the RC catalyst due to its untreated surface, lower specific area, and weak alkaline nature (pH value = 10.66 at 1:5 w/v). Furthermore, regardless of the amount of yield, almost similar fuel properties and functional groups of the products over the coded catalysts were observed. Generally, the possibility of calcium hypochlorite precipitate as a precursor of Ca-based heterogeneous catalyst has been effectively proven in this research, which could be very important for environmental safety and industrial resource integration.
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Affiliation(s)
- Kedir Derbie Mekonnen
- School of Mechanical and Chemical Engineering, Kombolcha Institute of Technology-Wollo University, Wollo, Ethiopia
| | - Kefyalew Hailemariam
- School of Mechanical, Chemical, and Materials Engineering, Adama Science and Technology University, Adama, Ethiopia
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Makomere R, Rutto H, Koech L. The assessment of response surface methodology (RSM) and artificial neural network (ANN) modeling in dry flue gas desulfurization at low temperatures. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2023; 58:191-203. [PMID: 36760196 DOI: 10.1080/10934529.2023.2174334] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 10/10/2022] [Accepted: 10/11/2022] [Indexed: 06/18/2023]
Abstract
The performance of a flue gas desulfurization (FGD) system is characterized by SO2 removal efficiency (Y1) and reagent conversion (Y2). Achieving a near-perfect reaction environment has been of concern in dry FGD (DFGD) due to the low reactivity compared to the wet and semi-dry units. This study will appraise output responses using modeling by response surface methodology (RSM) and artificial neural networks (ANN) approaches. The impacts of input parameters like hydration time, hydration temperature, diatomite to hydrated lime (Ca(OH)2), sulfation temperature and inlet gas concentration will be studied using a randomized central composite design (CCD). ANN fitting tool mapped the CCD metadata using the Levenberg-Marquardt (LM) algorithm activated by the hyperbolic tangent (tansig) function. The hidden cells ranged from 7 to 10 to ascertain the effect node architecture on modeling accuracy. Validation of each procedure was assessed using root mean square error (RMSE), mean square error (MSE) and R-Squared studies. The outcomes presented a more accurate 5-10-2 ANN model in the mapping of the DFGD from R2 data of Y1 = 0.993 and Y2 = 0.9986 with a mapping deviation from the RMSE values of Y1 = 0.48465; Y2 = 0.44971 and MSE results of Y1 = 0.23488; Y2.= 0.20229.
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Affiliation(s)
- Robert Makomere
- Clean Technology and Applied Materials Research Group, Department of Chemical and Metallurgical Engineering, Vaal University of Technology, Vanderbijlpark, South Africa
| | - Hilary Rutto
- Clean Technology and Applied Materials Research Group, Department of Chemical and Metallurgical Engineering, Vaal University of Technology, Vanderbijlpark, South Africa
| | - Lawrence Koech
- Clean Technology and Applied Materials Research Group, Department of Chemical and Metallurgical Engineering, Vaal University of Technology, Vanderbijlpark, South Africa
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Makomere RS, Rutto HL, Koech L. The Use of Cellulose Nanocrystals to Support Ca(OH)2 Nanoparticles with Diatomite Incorporation in Sulphur Capture at Low Temperatures: Optimisation and Modelling. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2022. [DOI: 10.1007/s13369-022-07491-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Molla MR, Begum MHA, Farhad SFU, Asadur Rahman ASM, Tanvir NI, Bashar MS, Bhuiyan RH, Alam MS, Hossain MS, Rahman MT. Facile extraction and characterization of calcium hydroxide from paper mill waste sludge of Bangladesh. ROYAL SOCIETY OPEN SCIENCE 2022; 9:220681. [PMID: 35991328 PMCID: PMC9381070 DOI: 10.1098/rsos.220681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 07/14/2022] [Indexed: 06/15/2023]
Abstract
Herein, paper mill waste sludge (PMS) from two different sources has been investigated to extract calcium hydroxide, Ca(OH)2 by a facile and inexpensive extraction process. PMS samples, collected from local paper mill plants of Bangladesh, were the main precursors wherein HCl and NaOH were used for chemical treatment. The as-synthesized products were analysed by a variety of characterization tools including X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) elemental analyses. Our studies confirm that the extracted product contains Ca(OH)2 as a major content, albeit it also includes CaCO3 phase owing to the inescapable carbonation process from the surrounding environment. The particle size of the synthesized products is in the range of 450-500 nm estimated from SEM micrographs. The crystallite domain size of the same estimated from XRD analyses and was found to be approximately 47 and 31 nm respectively for product-A and product-B considering major (101) Bragg peak of Ca(OH)2. The yield percentage of the isolated products is about 65% for samples collected from both sources.
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Affiliation(s)
| | | | | | | | | | - Muhammad Shahriar Bashar
- Institute of Fuel Research and Development, Bangladesh Council of Scientific and Industrial Research, Dhaka, 1205, Bangladesh
| | - Riyadh Hossen Bhuiyan
- Fiber and Polymer Research Division, Bangladesh Council of Scientific and Industrial Research, Dhaka, 1205, Bangladesh
| | - Md. Sha Alam
- Institute of Mining, Mineralogy and Metallurgy, Bangladesh Council of Scientific and Industrial Research, Joypurhat 5900, Bangladesh
| | - Mohammad Sajjad Hossain
- Industrial Physics Division, BCSIR Laboratories, Dhaka, Bangladesh
- Institute of Mining, Mineralogy and Metallurgy, Bangladesh Council of Scientific and Industrial Research, Joypurhat 5900, Bangladesh
| | - Mir Tamzid Rahman
- Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh
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Camargos CH, Poggi G, Chelazzi D, Baglioni P, Rezende CA. Strategies to mitigate the synergistic effects of moist-heat aging on TEMPO-oxidized nanocellulose. Polym Degrad Stab 2022. [DOI: 10.1016/j.polymdegradstab.2022.109943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Tien Lam N, Minh Quan V, Boonrungsiman S, Sukyai P. Effectiveness of bio-dispersant in homogenizing hydroxyapatite for proliferation and differentiation of osteoblast. J Colloid Interface Sci 2022; 611:491-502. [PMID: 34973654 DOI: 10.1016/j.jcis.2021.12.088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/27/2021] [Accepted: 12/14/2021] [Indexed: 11/28/2022]
Abstract
Hydroxyapatite (HA), an inorganic compound, plays an essential role in the proliferation and differentiation of bone cells. Using cellulose nanocrystals (CNCs) as green dispersants to improve homogenization of HA is promising in the fabrication of nanocomposite scaffolds with biocompatibility for bone tissue engineering. The HA/CNC (HC) nanoparticle suspension was incorporated in polyvinyl alcohol (PVA)-based scaffold to investigate the physical and chemical properties. The PVA/HC composites demonstrated high porous structure and swelling ability for cell attachment and a 3-fold improvement in compressive modulus compared with free HC scaffold. Moreover, the presence of HC nanoparticles has promoted the proliferation and mineralization of pre-osteoblast. Our findings could provide an effective strategy by using bio-dispersants to incorporate mineral elements into synthetic polymers for the fabrication of functional tissue engineering scaffolds.
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Affiliation(s)
- Nga Tien Lam
- Cellulose for Future Materials and Technologies Special Research Unit, Department of Biotechnology, Faculty of Agro-Industry, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
| | - Vo Minh Quan
- Cellulose for Future Materials and Technologies Special Research Unit, Department of Biotechnology, Faculty of Agro-Industry, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
| | - Suwimon Boonrungsiman
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
| | - Prakit Sukyai
- Cellulose for Future Materials and Technologies Special Research Unit, Department of Biotechnology, Faculty of Agro-Industry, Kasetsart University, Chatuchak, Bangkok 10900, Thailand; Center for Advanced Studies for Agriculture and Food, Kasetsart University Institute for Advanced Studies, Kasetsart University, Chatuchak, Bangkok 10900, Thailand.
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