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Cao Y, Song Y, Fan X, Ma L, Feng T, Zeng J, Xue C, Xu J. A smartphone-assisted sensing hydrogels based on UCNPs@SiO 2-phenol red nanoprobes for detecting the pH of aquatic products. Food Chem 2024; 451:139428. [PMID: 38678665 DOI: 10.1016/j.foodchem.2024.139428] [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: 03/04/2024] [Revised: 04/11/2024] [Accepted: 04/18/2024] [Indexed: 05/01/2024]
Abstract
For some aquatic products, pH has been considered a useful index to reflect the changes in materials during the loss of freshness. Based on the inner filter effect (IFE) between deprotonated phenol red (PR) and upconversion nanoparticles (UCNPs), UCNPs coated with PR-doped SiO2 shell were embedded in agarose hydrogel to develop a smartphone-assisted method for pH sensing. With the enhancement of pH response using a phase transfer agent (i.e., tetra butyl ammonium hydroxide, TBAH), the proposed senor realized the colorimetric and fluorescence detection of pH in the range of pH 6.6-8 and pH 6-8, respectively. The sensor also showed satisfied reversibility when switched between pH 6 and 8 for at least 5 cycles. Moreover, this sensor displayed great sensitivity, stability, and portability in analyzing actual fish, shrimp, and shellfish samples, providing a new sight for evaluating the freshness of aquatic products.
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Affiliation(s)
- Yunrui Cao
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China.
| | - Yu Song
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China.
| | - Xiaowei Fan
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China
| | - Lei Ma
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China.
| | - Tingyu Feng
- Qingdao Institute of Marine Bioresources for Nutrition & Health Innovation, No. 106, Xiangyang Road, Qingdao, Shandong Province 266109, PR China
| | - Junpeng Zeng
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China
| | - Changhu Xue
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China; Qingdao Marine Science and Technology Center, Qingdao 266235, PR China.
| | - Jie Xu
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China.
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2
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Majid S, Ahmad KS, Yusuf K, Ashraf GA. Exploring the sorption and degradation dynamics of validamycin-A in agricultural soils for environmental management. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2024; 46:340. [PMID: 39073647 DOI: 10.1007/s10653-024-02124-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Accepted: 07/09/2024] [Indexed: 07/30/2024]
Abstract
Validamycin A (VA) is one of the antibiotics that have been utilized in agriculture in Asia; nevertheless, there haven't been many investigations on what happens to VA in soil. The rate at which pesticides are adsorbed into the soil must be determined, since their usage in agriculture is growing. In order to accomplish this, the current study investigated the sorption and degradation of VA in ten distinct soil samples via batch equilibrium studies while maintaining strict laboratory controls. In thermodynamic analysis with a C-type curve, the negative values of Gibbs free energy (ΔG) are thoroughly evaluated using both linear and Freundlich models. These values vary from - 16.8 to - 22.2 kJ/mol. Impact of temperature (18, 23, and 30 °C) and pH (5, 7, and 9) on the degradation of this antibiotic in soil was also scrutinized. Our findings demonstrated that, as a result of enhanced microbial activity at higher temperatures, VA deteriorated more quickly at 23 °C and 30 °C than at 18 °C. In comparison to lower pH values, the VA removal efficiencies with sample-4 was significantly greater at pH 7.4 (92.9%) and pH 9 (97.4%). Moreover, first order reaction kinetics were followed in the degradation of VA. The results demonstrated that VA bound to the selected soils, resulting in medium to low persistence as demonstrated by degradation values. In summary, this study provides important information regarding the behavior and fate of VA in different types of soil, information that might be useful in developing workable management strategies and environmental risk assessments.
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Affiliation(s)
- Sara Majid
- Department of Environmental Sciences, Fatima Jinnah Women University, Old Presidency, The Mall, Rawalpindi, 46000, Pakistan
| | - Khuram Shahzad Ahmad
- Department of Environmental Sciences, Fatima Jinnah Women University, Old Presidency, The Mall, Rawalpindi, 46000, Pakistan.
| | - Kareem Yusuf
- Department of Chemistry, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Ghulam Abbas Ashraf
- College of Environment, Hohai University, Nanjing, 210098, China
- New Uzbekistan University, Muustaqillik Ave. 54, 100007, Tashkent, Uzbekistan
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3
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Waeterschoot J, Kayahan E, Breukers J, Lammertyn J, Casadevall I Solvas X. The effects of droplet stabilization by surfactants and nanoparticles on leakage, cross-talk, droplet stability, and cell adhesion. RSC Adv 2024; 14:24115-24129. [PMID: 39091374 PMCID: PMC11292313 DOI: 10.1039/d4ra04298k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Accepted: 07/01/2024] [Indexed: 08/04/2024] Open
Abstract
Partially fluorinated nanoparticles (FNPs) have been proposed as a promising alternative for stabilising aqueous droplets in fluorinated oils. The exceptional energetic stability of FNPs at the droplet interface holds the potential for minimising leakage, enhancing stability, and promoting improved cell adhesion. However, their lower diffusion coefficient compared to surfactants presents challenges in achieving rapid droplet stabilisation, which is important in microfluidics applications. While several studies have focused on some of these aspects, a comprehensive study and direct comparison with conventional fluorosurfactants is still missing. In this manuscript, we undertake an examination and comparison of four crucial facets of both FNP- and surfactant-stabilised droplets: leakage of compounds, emulsion stability, droplet formation dynamics and cell adhesion. Contrary to what has previously been claimed, our findings demonstrate that FNPs only reduce leakage and cross-talk in very specific cases (e.g., resorufin), failing to provide enhanced compartmentalisation for highly hydrophobic dyes (e.g., rhodamine dyes). On the other hand, FNP-stabilised droplets indeed exhibit greater long-term stability compared to their surfactant-stabilised counterparts. Regarding the size of droplets generated via a diversity of microfluidic methods, no significant differences were observed between FNP-stabilised and surfactant-stabilised droplets. Finally, the previously reported improvements in cell adhesion and spreading on FNP-stabilised interfaces is limited to flat oil/water (o/w) interfaces and could not be observed within droplets. These comprehensive analyses shed light on the nuanced performance of FNPs and commercial fluorosurfactants as stabilising agents for aqueous droplets in fluorinated oils, contributing valuable insights for choosing the correct formulation for specific droplet-based microfluidics applications.
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Affiliation(s)
- Jorik Waeterschoot
- Biomimetics Group, Divison of Mechatronics, Biostatistics and Sensors (MeBios), Department of Biosystems KU Leuven, Willem de Croylaan 42 3001 Leuven Belgium
| | - Emine Kayahan
- Biomimetics Group, Divison of Mechatronics, Biostatistics and Sensors (MeBios), Department of Biosystems KU Leuven, Willem de Croylaan 42 3001 Leuven Belgium
| | - Jolien Breukers
- Biosensors Group, Divison of Mechatronics, Biostatistics and Sensors (MeBios), Department of Biosystems KU Leuven, Willem de Croylaan 42 3001 Heverlee Belgium
| | - Jeroen Lammertyn
- Biosensors Group, Divison of Mechatronics, Biostatistics and Sensors (MeBios), Department of Biosystems KU Leuven, Willem de Croylaan 42 3001 Heverlee Belgium
| | - Xavier Casadevall I Solvas
- Biomimetics Group, Divison of Mechatronics, Biostatistics and Sensors (MeBios), Department of Biosystems KU Leuven, Willem de Croylaan 42 3001 Leuven Belgium
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4
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Zhang W, Liu H, Qiu X, Zuo F, Wang B. Mesoporous silica nanoparticles as a drug delivery mechanism. Open Life Sci 2024; 19:20220867. [PMID: 38756857 PMCID: PMC11097044 DOI: 10.1515/biol-2022-0867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 03/19/2024] [Accepted: 03/21/2024] [Indexed: 05/18/2024] Open
Abstract
Research in intelligent drug delivery systems within the field of biomedicine promises to enhance drug efficacy at disease sites and reduce associated side effects. Mesoporous silica nanoparticles (MSNs), characterized by their large specific surface area, appropriate pore size, and excellent biocompatibility, have garnered significant attention as one of the most effective carriers for drug delivery. The hydroxyl groups on their surface are active functional groups, facilitating easy functionalization. The installation of controllable molecular machines on the surface of mesoporous silica to construct nanovalves represents a crucial advancement in developing intelligent drug delivery systems (DDSs) and addressing the issue of premature drug release. In this review, we compile several notable and illustrative examples of MSNs and discuss their varied applications in DDSs. These applications span regulated and progressive drug release mechanisms. MSNs hold the potential to enhance drug solubility, improve drug stability, and mitigate drug toxicity, attributable to their ease of functionalization. Furthermore, intelligent hybrid nanomaterials are being developed, featuring programmable properties that react to a broad spectrum of stimuli, including light, pH, enzymes, and redox triggers, through the use of molecular and supramolecular switches.
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Affiliation(s)
- Wei Zhang
- Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Tianjin’s Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, No. 1 West Huan-Hu Road, Ti Yuan Bei, Hexi District, Tianjin300060, China
| | - Hongwei Liu
- Department of Pharmacy, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, 300072, China
| | - Xilong Qiu
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, No. 10 of Poyang Lake Road, Tuanpo Xincheng West District, Tianjin301617, China
| | - Fanjiao Zuo
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, No. 10 of Poyang Lake Road, Tuanpo Xincheng West District, Tianjin301617, China
| | - Boyao Wang
- School of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin301617, China
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5
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Shafiq F, Liu C, Zhou H, Chen H, Yu S, Qiao W. Stearic acid-modified hollow hydroxyapatite particles with enhanced hydrophobicity for oil adsorption from oil spills. CHEMOSPHERE 2024; 348:140651. [PMID: 37995975 DOI: 10.1016/j.chemosphere.2023.140651] [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: 02/20/2023] [Revised: 10/12/2023] [Accepted: 11/06/2023] [Indexed: 11/25/2023]
Abstract
Oil spills lead to a substantial depletion of aquatic biodiversity. The mitigation of an oil spill can entail considerable financial outlays, give rise to consequential environmental impacts, and present formidable operational complexities. In this research, hollow hydroxyapatite particles with enhanced oil adsorption characteristics were prepared by surface modification with stearic acid. Peanut and vacuum pump oils were used to imitate oil spills and conduct adsorption tests. The 50% stearic acid-modified hydroxyapatite (Sa/HAP) adsorbent showed superior hydrophobic properties with respect to water contact angle data. Adsorption isotherm analysis revealed that the adsorption processes of peanut and vacuum pump oils matched well with the Sips isotherm model, with regression coefficients of 0.992 and 0.996, respectively. The oil adsorption by the modified hydroxyapatite (HAP) adsorbent was found to be 9.85 g·g-1 for peanut oil and 12.13 g·g-1 for vacuum pump oil. Furthermore, the adsorption kinetics performance was determined by chemical interaction, whereas the adsorption equilibrium capacities were 8.97 g·g-1 and 11.41 g·g-1, respectively. Recycling of the spent adsorbent was performed with toluene stripping. The synthesized oil-adsorbents were analyzed by SEM, FTIR, XRD, contact angle, and TGA analyses. Hence, the efficacy of the Sa/HAP material as a potential adsorbent for the purification of oil-contaminated water was established, attributed to its commendable oil adsorption capability.
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Affiliation(s)
- Farishta Shafiq
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China
| | - Chenyu Liu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China.
| | - Hengjun Zhou
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China
| | - Hailiang Chen
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China
| | - Simiao Yu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China
| | - Weihong Qiao
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China.
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6
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Guo Y, Cai J, Liang Y, He Y. Preparation of emulsion hydrogels encapsulating extractant by the Pickering emulsion template method to recover lanthanum ions in aqueous solutions. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 88:3009-3023. [PMID: 38096085 PMCID: wst_2023_379 DOI: 10.2166/wst.2023.379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
To solve the problem of liquid-liquid extraction of La(III), the oil-in-water Pickering emulsions were prepared by utilizing the aqueous solution of sodium alginate as the continuous phase, kerosene-diluted extractant di-(2-ethylhexyl) phosphate (P204) as the dispersed phase, and modified silica as an emulsifier. Then the emulsions were added to a calcium chloride solution to prepare the Pickering emulsion hydrogels (PEHGs) to better remove La(III). The PEHGs were characterized using Fourier transform infrared, thermogravimetric analysis, and scanning electron microscopy. The adsorption properties of PEHGs for La(III) in the aqueous solution were investigated using a UV-vis spectrophotometer. The study found that P204 was successfully coated by hydrogels and reached the highest adsorption capacity of 48 mg/g at pH 4. The amount of adsorption increased with the rise in temperature from 298 to 318 K. La(III) adsorption experimental data were more consistent with the pseudo-second-order kinetic model and the Langmuir isotherm model. Thermodynamic parameters showed that the adsorption of La(III) by PEHGs was a spontaneous endothermic process. The internal diffusion model revealed a linear relationship, indicating that internal diffusion played a role in the adsorption process. The encapsulating property of PEHGs indicated its potential usefulness in industrial wastewater for treating La(III).
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Affiliation(s)
- Yong Guo
- Department of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, 58 Yanta Middle Road, Beilin District, Xi'an, China E-mail:
| | - Jindian Cai
- Department of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, 58 Yanta Middle Road, Beilin District, Xi'an, China
| | - Yaodong Liang
- Department of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, 58 Yanta Middle Road, Beilin District, Xi'an, China
| | - Yongjun He
- Department of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, 58 Yanta Middle Road, Beilin District, Xi'an, China
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7
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Abdulazeez I, Alrajjal AS, Ganiyu S, Baig N, Salhi B, AbdElazem S. Facile engineering of mesoporous silica for the effective removal of anionic dyes from wastewater: Insights from DFT and experimental studies. Heliyon 2023; 9:e21356. [PMID: 37920496 PMCID: PMC10618791 DOI: 10.1016/j.heliyon.2023.e21356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 10/10/2023] [Accepted: 10/19/2023] [Indexed: 11/04/2023] Open
Abstract
The discharge of dye effluents from the textile industries has become a major environmental issue due to its potential to impart serious harm to human health and aquatic life. Mesoporous silica due to its high chemical stability, large surface area, tunable morphologies, large pore volume and pore size and cost-effectiveness is commonly used to remove such dyes before recycling of the wastewater for agricultural, domestic, and industrial applications. However, the low colloidal stability, the fast aggregation of the silica particles and the slow etching of the silica surface often results in the fast deactivation of the adsorbents and limits their long-term applications. In this study, we report the functionalization of mesoporous silica (SBA-15) with ZnO nanoparticles for the effective removal of anionic dyes. The Zn-silica exhibited highly positive surface with a dipole moment of 172 Debye and high charge transfer efficacy with an energy bandgap (ΔE) of 3.35 eV as revealed by quantum chemical DFT simulations. It achieved excellent removal of Alizarin red dye reaching a removal efficiency of 99.99 % and an adsorption capacity of 50 mg/g. In the presence of heavy metal ions commonly present in wastewater (Cd2+, Co2+, Zn2+, Ni2+, Cu2+ and Hg2+), the Zn-silica maintain excellent stability, high selectivity, and reusability within 5 cycles without a significant decline in efficiency. This study thus presents an effective way of wastewater purification on cost-effective adsorbents for meeting the water scarcity demands.
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Affiliation(s)
- Ismail Abdulazeez
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Ali S. Alrajjal
- Aerospace Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Saheed Ganiyu
- Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
- Interdisciplinary Research Center for Refining and Advanced Chemicals, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Nadeem Baig
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Billel Salhi
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Sohaib AbdElazem
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
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8
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Saberi Riseh R, Vatankhah M, Hassanisaadi M, Kennedy JF. Chitosan/silica: A hybrid formulation to mitigate phytopathogens. Int J Biol Macromol 2023; 239:124192. [PMID: 36996949 DOI: 10.1016/j.ijbiomac.2023.124192] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/07/2023] [Accepted: 03/23/2023] [Indexed: 03/31/2023]
Abstract
Long-term and indiscriminate use of synthetic pesticides to mitigate plant pathogens have created serious issues of water health, soil contamination, non-target organisms, resistant species, and unpredictable environmental and human health hazards. These constraints have forced scientists to develop alternative plant disease management strategies to reduce synthetic chemical' dependency. During the last 20 years, biological agents and resistance elicitors have been the most important used alternatives. Silica-based materials/chitosan with a dual mode of action have been proposed as promising alternatives to prevent plant diseases through direct and indirect mechanisms. Moreover, the combined application of nano-silica and chitosan, due to their controllable morphology, high loading capacity, low toxicity, and efficient encapsulation, act as suitable carriers for biological agents, pesticides, and essential oils, making them proper candidates for mitigation of phytopathogens. Based on this potential, this literature study reviewed the silica and chitosan properties and their function in the plant. It also assessed their role in the fighting against soil and aerial phytopathogens, directly and indirectly, as novel hybrid formulations in future managing platforms.
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Affiliation(s)
- Roohallah Saberi Riseh
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan 771897111, Iran.
| | - Masoumeh Vatankhah
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan 771897111, Iran
| | - Mohadeseh Hassanisaadi
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan 771897111, Iran
| | - John F Kennedy
- Chembiotech Laboratories Ltd, WR15 8FF Tenbury Wells, United Kingdom.
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El Amri A, Kadiri L, Hsissou R, Lebkiri A, Wardighi Z, Rifi EH, Lebkiri A. Investigation of Typha Latifolia (TL) as potential biosorbent for removal of the methyl orange anionic dye in the aqueous solution. Kinetic and DFT approaches. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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10
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Al-Amrani WA, Hanafiah MAKM, Mohammed AHA. A comprehensive review of anionic azo dyes adsorption on surface-functionalised silicas. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:76565-76610. [PMID: 36166120 DOI: 10.1007/s11356-022-23062-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 09/13/2022] [Indexed: 06/16/2023]
Abstract
Surface -functionalised silica networks are advanced adsorbents. They have been given much attention for treating wastewater using the adsorption technique due to the silanol reactivity, resulting in strong binding affinities towards many pollutants. This review discusses the removal of anionic azo dyes utilising various functional groups such as amines, surfactants, polymers, macrocyclic, and other chelating groups functionalised on silica's surface. This review also reveals the steadily increasing interest in surface-functionalised silicas as adsorbents, emphasising the scholarly advancements in this field as a platform for future research. For that, adsorption capacities with different experimental conditions have been compared. The possible adsorption mechanisms, rate-limiting step, and factors affecting the anionic azo dye adsorption process have been comprehensively discussed. This review discloses that adsorbent characteristics such as porosity and functional groups, besides structural properties of an anionic azo dye, significantly affect adsorption. The adsorption process followed the Langmuir isotherm and pseudo-second-order models, with a predominantly spontaneous and endothermic nature. Multiple interactions, including electrostatic interaction, π-π interactions, and hydrogen bonding, are observed between dyes and functionalised silicas, indicating the adsorption process's complexity. Regeneration and cost-economic analysis are also presented to provide a roadmap for sustainable improvements. Chemical and biological regeneration techniques restore > 80% of the spent functionalised silicas. There is a significant opportunity to improve their efficiencies and regenerability, resulting in surface-functionalised silicas being used commercially instead of only in the laboratory. Finally, future research has been proposed by identifying current research gaps, particularly concerning the application of functionalised silicas in wastewater treatment.
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11
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Ali S, Mansha M, Baig N, Khan SA. Cost-Effective and Selective Fluorescent Chemosensor (Pyr-NH@SiO2 NPs) for Mercury Detection in Seawater. NANOMATERIALS 2022; 12:nano12081249. [PMID: 35457957 PMCID: PMC9024866 DOI: 10.3390/nano12081249] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 03/29/2022] [Accepted: 04/02/2022] [Indexed: 11/23/2022]
Abstract
The release of mercury into the environment has adverse effects on humans and aquatic species, even at very low concentrations. Pyrene and its derivatives have interesting fluorescence properties that can be utilized for mercury (Hg2+) ion sensing. Herein, we reported the highly selective pyrene-functionalized silica nanoparticles (Pyr-NH@SiO2 NPs) for chemosensing mercury (Hg2+) ions in a seawater sample. The Pyr-NH@SiO2 NPs were synthesized via a two-step protocol. First, a modified Stöber method was adopted to generate amino-functionalized silica nanoparticles (NH2@SiO2 NPs). Second, 1-pyrenecarboxylic acid was coupled to NH2@SiO2 NPs using a peptide coupling reaction. As-synthesized NH2@SiO2 NPs and Pyr-NH@SiO2 NPs were thoroughly investigated by 1H-NMR, FTIR, XRD, FESEM, EDS, TGA, and BET surface area analysis. The fluorescent properties were examined in deionized water under UV-light illumination. Finally, the developed Pyr-NH@SiO2 NPs were tested as a chemosensor for Hg2+ ions detection in a broad concentration range (0–50 ppm) via photoluminescence (PL) spectroscopy. The chemosensor can selectively detect Hg2+ ions in the presence of ubiquitous ions (Na+, K+, Ca2+, Mg2+, Ba2+, Ag+, and seawater samples). The quenching of fluorescence properties with Hg2+ ions (LOD: 10 ppb) indicates that Pyr-NH@SiO2 NPs can be effectively utilized as a promising chemosensor for mercury ion detection in seawater environments.
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Affiliation(s)
- Shahid Ali
- Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
- Interdisciplinary Research Center for Hydrogen and Energy Storage, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
| | - Muhammad Mansha
- Interdisciplinary Research Center for Hydrogen and Energy Storage, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
| | - Nadeem Baig
- Interdisciplinary Research Centre for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
| | - Safyan Akram Khan
- Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
- Interdisciplinary Research Center for Hydrogen and Energy Storage, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
- Correspondence: ; Tel.: +966-13-860-7261
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12
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Comparative effects of zinc oxide nanoparticles over the interfacial properties of low concentrations of ionic surfactants at interfaces. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128241] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Zhao Y, Liu X, Li W, Huang K, Shao H, Qu C, Liu J. One-step synthesis of garlic peel derived biochar by concentrated sulfuric acid: Enhanced adsorption capacities for Enrofloxacin and interfacial interaction mechanisms. CHEMOSPHERE 2022; 290:133263. [PMID: 34906531 DOI: 10.1016/j.chemosphere.2021.133263] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 12/06/2021] [Accepted: 12/10/2021] [Indexed: 05/27/2023]
Abstract
This study put forward a one-step carbonization method by concentrated sulfuric acid to prepare garlic peel derived biochar, and the synthetic conditions were optimized by L16(45) orthogonal experiments. Notably, in order to study the differences between the proposed synthetic method and the conventional pyrolysis method, the concentrated sulfuric acid carbonized garlic peels biochar (CSGPB) was compared with pyrolysis derived garlic peel biochar (HTGPB) in characterization and adsorption capacities for Enrofloxacin (ENR). Results showed that CSGPB exhibited more graphite-like structures with more active functional groups on the surface, and the equilibrium adsorption capacity of CSGPB (142.3 mg g-1) was 13.7 times of HTGPB (10.4 mg g-1) under identical conditions. Moreover, the adsorption behaviors including adsorption kinetics, isotherms and thermodynamics of CSGPB for ENR were fully investigated and discussed. Based on the above experiments, density functional theory (DFT) simulations were performed to reveal the interfacial interaction and adsorption mechanism. Results showed π-π interaction between quinolone moieties of ENR and graphite-like structures in CSGPB might be the dominant mechanism. As for the functional groups, the adsorption energies were -40.46, -15.21 and -5.96 kJ mol-1 for -SO3H, -OH and -COOH, respectively, which indicated -SO3H was the most active functional groups on the surface of CSGPB. This study provided a new sustainable perspective for the design of efficient biochars, and explored the interfacial interaction mechanism of antibiotics removal on biochars.
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Affiliation(s)
- Yanjun Zhao
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Xintong Liu
- School of Light Industry, Beijing Technology and Business University, No. 33 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Wenhui Li
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Kai Huang
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Huiqi Shao
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Chen Qu
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Jiemin Liu
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian District, Beijing, 100083, China.
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14
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Tago A, Yanase M, Yamauchi N, Nakashima K, Nagao D, Kobayashi Y. Preparation and properties of silica-coated metallic nickel particles. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127524] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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15
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Gautam RK, Jaiswal N, Singh AK, Tiwari I. Ultrasound-enhanced remediation of toxic dyes from wastewater by activated carbon-doped magnetic nanocomposites: analysis of real wastewater samples and surfactant effect. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:36680-36694. [PMID: 33704640 DOI: 10.1007/s11356-021-13256-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
Water pollution has become a worldwide threat as the natural water resources are shrinking day by day. Emergent actions are needed to conserve water stocks to fulfill the sustainable development goals. Herein, we have prepared activated carbon-doped magnetic nanocomposites (AC@CoFe2O4) with environment friendly approach and characterized for FTIR, XRD, SEM, EDS, BET surface area, and pHzpc. AC@CoFe2O4 nanocomposite was applied for the decolorization of toxic food dyes (rhodamine B and tartrazine) from wastewater. Effect of ultrasonic waves, pH, contact time, surfactants, temperature, and analysis of real wastewater systems were studied. Adsorption isotherm, kinetics, and thermodynamics of the experiment were calculated for the present removal process. The effect of ultrasonication shows that the maximum removal percentage for RhB was found to be 92% and for tartrazine, it was found to be 86% at 60 min. Ultrasound-assisted adsorption and degradation revealed good results because of the formation of highly active ·H and ·OH radicals in the liquid through the decomposition of water molecules by the formation of hot spots under ultrasonic waves. Highest decolorization of 69% was obtained for RhB with anionic surfactant SDS and climax decolorization of tartrazine was acquired in case of CTAB as 60.5%. Analysis of real wastewater samples shows that the decolorization of RhB was found to be ~ 91% from well-water and ~ 95% removal of tartrazine was observed from submersible water on AC@CoFe2O4 nanocomposites. The decolorization best fitted (R2 < 0.988) with Langmuir model and value of Langmuir climax decolorization efficiency (Q0) was found to be 142.68 and 435.72 mg/g for RhB and tartrazine, respectively. Kinetic analysis revealed that adsorption follows pseudo-second-order equation. The dye-loaded AC@CoFe2O4 nanocomposites were recycled by 0.1 M HCl or NaOH and regenerated AC@CoFe2O4 nanocomposites were used up to five rounds with better adsorption efficiency.
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Affiliation(s)
- Ravindra Kumar Gautam
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 211005, India
| | - Nandita Jaiswal
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 211005, India
| | - Ankit Kumar Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 211005, India
| | - Ida Tiwari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 211005, India.
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16
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Aziz A, Shah SS, Jafar Mazumder MA, Oyama M, Al‐Betar A. Carbon Nanofiber and Poly[2‐(methacryloyloxy) ethyl] Trimethylammonium Chloride Composite as a New Benchmark Carbon‐based Electrocatalyst for Sulfide Oxidation. Chem Asian J 2021; 16:1570-1583. [DOI: 10.1002/asia.202100309] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/20/2021] [Indexed: 12/30/2022]
Affiliation(s)
- Abdul Aziz
- Center of Research Excellence in Nanotechnology (CENT) King Fahd University of Petroleum & Minerals KFUPM Box 5040 Dhahran 31261 Saudi Arabia
| | - Syed Shaheen Shah
- Center of Research Excellence in Nanotechnology (CENT) King Fahd University of Petroleum & Minerals KFUPM Box 5040 Dhahran 31261 Saudi Arabia
- Physics Department King Fahd University of Petroleum & Minerals KFUPM Box 5047 Dhahran 31261 Saudi Arabia
| | | | - Munetaka Oyama
- Department of Material Chemistry Graduate School of Engineering Kyoto University Nishikyo-ku Kyoto 615-8520 Japan
| | - Abdul‐Rahman Al‐Betar
- Chemistry Department King Fahd University of Petroleum & Minerals Dhahran 31261 Saudi Arabia
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17
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Fabrication of iron nanoparticles using Parthenium: A combinatorial eco-innovative approach to eradicate crystal violet dye and phosphate from the aqueous environment. ACTA ACUST UNITED AC 2021. [DOI: 10.1016/j.enmm.2021.100426] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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18
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Templated synthesis of NiO/SiO2 nanocomposite for dye removal applications: Adsorption kinetics and thermodynamic properties. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126253] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Niu Y, Zhang W, Zhai C, Liu J. Effect of poly(diallyldimethylammonium chloride) adsorption on the dispersion features of SiC particles in aqueous media. NEW J CHEM 2021. [DOI: 10.1039/d1nj00062d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The dispersion behavior of SiC suspensions was improved by PDADMAC adsorbed on the SiC surface effectively through electrostatic interaction.
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Affiliation(s)
- Yifan Niu
- Beijing Key Laboratory of Electrochemical Process and Technology for materials
- Beijing University of Chemical Technology
- Beijing 100029
- People's Republic of China
| | - Wenxiao Zhang
- Beijing Key Laboratory of Electrochemical Process and Technology for materials
- Beijing University of Chemical Technology
- Beijing 100029
- People's Republic of China
| | - Chaoyang Zhai
- Beijing Key Laboratory of Electrochemical Process and Technology for materials
- Beijing University of Chemical Technology
- Beijing 100029
- People's Republic of China
| | - Jiaxiang Liu
- Beijing Key Laboratory of Electrochemical Process and Technology for materials
- Beijing University of Chemical Technology
- Beijing 100029
- People's Republic of China
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20
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Singh S, Patel B, Parikh K, Kumar S. Fabrication of Cationic Surfactant (Conventional/Gemini) Functionalized Gr@ZrO
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Nanocomposite with Faster Adsorbability of an Anionic Azo Dye from Aqueous Solution. ChemistrySelect 2020. [DOI: 10.1002/slct.202003532] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Sneha Singh
- Applied Chemistry Department Faculty of Technology and Engineering The Maharaja Sayajirao University of Baroda Vadodara 390 002 India
| | - Brijesh Patel
- Applied Chemistry Department Faculty of Technology and Engineering The Maharaja Sayajirao University of Baroda Vadodara 390 002 India
| | - Kushan Parikh
- Department of Chemistry Parul Institute of Applied Sciences Parul University Vadodara 391 760 India
| | - Sanjeev Kumar
- Applied Chemistry Department Faculty of Technology and Engineering The Maharaja Sayajirao University of Baroda Vadodara 390 002 India
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21
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Saman N, Ahmad Kamal NA, Lye JWP, Mat H. Synthesis and characterization of CTAB-silica nanocapsules and its adsorption behavior towards Pd(II) ions in aqueous solution. ADV POWDER TECHNOL 2020. [DOI: 10.1016/j.apt.2020.06.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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22
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Evaluation of Polyethylene Glycol Crosslinked β-CD Polymers for the Removal of Methylene Blue. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10134679] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The environment is at the heart of global worldwide discussion. This study describes the synthesis of ecofriendly polymers by a crosslinking reaction between β-cyclodextrin as the monomer and polyethylene glycol diglycidyl ether (PEDGE) as well as ethylene diglycidyl ether (EDGE) as the crosslinking agents. The studied polymers were characterized by several techniques, such as SEM, FTIR, TGA-TDA and XRD. Their adsorption properties for methylene blue under various conditions of pH, contact time and initial concentration of dye were assessed in order to find the optimal conditions. The results indicate that the polymers are good nominates for methylene blue adsorption with adsorption capacities up to 15 mg/g. The adsorption mechanism was demonstrated to follow the Langmuir model. Finally, the regeneration of the polymers was investigated using Soxhlet extraction with ethanol. The absorption capacities of the adsorbent were stable after three cycles.
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23
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Saman N, Othman NS, Chew LY, Mohd Setapar SH, Mat H. Cetyltrimethylammonium bromide functionalized silica nanoparticles (MSN) synthesis using a combined sol-gel and adsorption steps with enhanced adsorption performance of oxytetracycline in aqueous solution. J Taiwan Inst Chem Eng 2020. [DOI: 10.1016/j.jtice.2020.07.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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24
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Rashid TU, Kabir SMF, Biswas MC, Bhuiyan MAR. Sustainable Wastewater Treatment via Dye–Surfactant Interaction: A Critical Review. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00676] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Taslim Ur Rashid
- Department of Textile Engineering, Chemistry and Science, Wilson College of Textiles, North Carolina State University, 1020 Main Campus Drive, Raleigh, North Carolina 27695, United States
| | - S M Fijul Kabir
- Department of Textile Engineering, Chemistry and Science, Wilson College of Textiles, North Carolina State University, 1020 Main Campus Drive, Raleigh, North Carolina 27695, United States
| | - Manik Chandra Biswas
- Department of Textile Engineering, Chemistry and Science, Wilson College of Textiles, North Carolina State University, 1020 Main Campus Drive, Raleigh, North Carolina 27695, United States
| | - M. A. Rahman Bhuiyan
- Department of Textile Engineering, Dhaka University of Engineering and Technology, Gazipur 1707, Bangladesh
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25
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Facilely synthesized recyclable mesoporous magnetic silica composite for highly efficient and fast adsorption of Methylene Blue from wastewater: Thermodynamic mechanism and kinetics study. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112656] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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26
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Meng L, Liu Q, Wang J, Fan Z, Wei X. Hydrophobic mesoporous silicon dioxide for improving foam stability. RSC Adv 2020; 10:18565-18571. [PMID: 35518323 PMCID: PMC9053769 DOI: 10.1039/d0ra02161j] [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: 03/07/2020] [Revised: 06/09/2020] [Accepted: 04/24/2020] [Indexed: 12/02/2022] Open
Abstract
In this study, mesoporous SiO2 nanoparticles (MSNs) were synthesized via a sol–gel method and modified with (3-chloropropyl) trimethoxysilane to make them hydrophobic (MMSNs). The material was characterized via SEM, TEM, FT-IR, DLS, BET and contact angle measurements. The MMSNs have good foam stability, so that the foam properties of the added particles have been increased by 38.4% in an oil/SDS solution. Simultaneously, it becomes a promising material for foam stabilization in order to enhance the oil recovery because it is bio-compatibile and environment friendly. Also, it provides a novel application-stable foam for mesoporous materials. In this study, mesoporous SiO2 nanoparticles (MSNs) were synthesized via a sol–gel method and modified with (3-chloropropyl) trimethoxysilane to make them hydrophobic (MMSNs).![]()
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Affiliation(s)
- Lihui Meng
- Key Laboratory of Improving Oil Recovery by Ministry of Education
- Northeast Petroleum University
- Daqing
- China
| | - Qingwang Liu
- Key Laboratory of Improving Oil Recovery by Ministry of Education
- Northeast Petroleum University
- Daqing
- China
| | - Jigang Wang
- Key Laboratory of Improving Oil Recovery by Ministry of Education
- Northeast Petroleum University
- Daqing
- China
| | - Zhenzhong Fan
- Key Laboratory of Improving Oil Recovery by Ministry of Education
- Northeast Petroleum University
- Daqing
- China
| | - Xiaoming Wei
- National Energy Research and Development Center of Heavy Oil
- Panjin
- China
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27
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Counterion engineered surfactants for the novel synthesis of colloidal metal and bimetal oxide/SiO2 materials with catalytic applications. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.03.053] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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28
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Marzec A, Szadkowski B, Rogowski J, Maniukiewicz W, Rybiński P, Prochoń M. New Organic/Inorganic Pigments Based on Azo Dye and Aluminum-Magnesium Hydroxycarbonates with Various Mg/Al Ratios. MATERIALS 2019; 12:ma12081349. [PMID: 31027185 PMCID: PMC6515457 DOI: 10.3390/ma12081349] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 04/18/2019] [Accepted: 04/23/2019] [Indexed: 01/19/2023]
Abstract
This study set out to investigate the impact of aluminum-magnesium hydroxycarbonates (LHs) with various Mg/Al ratios on the formation of hybrid pigments. The colorants were also evaluated for their flame-retardant properties. In the first part of the study, the hybrid pigments were submitted to comprehensive characterization using time-of-flight secondary ion mass spectrometry (TOF-SIMS), 27Al solid-state nuclear magnetic resonance (NMR) spectroscopy, powder X-ray diffraction analysis (XRD), thermogravimetric analysis (TGA), and N2 adsorption as well as scanning and transmission electron microscopy (SEM/STEM). The relationship between the Mg/Al ratios of the LH carriers and the formation of lake pigments was explored. The TOF-SIMS spectrum of LH modified with azo chromophore (AC) showed an intense peak for the C19H15O5N2Mg+ ion, confirming metal-dye interactions. Incorporation of the organic colorant into the LH host enhanced its resistance to dissolution in organic solvent (butyl acetate), as well as improving its color stability under elevated temperatures. The second part of the study evaluated the flammability of ethylene-norbornene (EN) composites, in which the pigments had been applied as colorants. Cone calorimetry revealed that addition of the organic-inorganic pigments resulted in a substantial improvement of the flame retardancy, reflected by the decreased values of the heat release rate (HRRMAX) and total heat release parameter (THR) of the EN composites in comparison to a neat sample (unfilled EN).
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Affiliation(s)
- Anna Marzec
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland.
| | - Bolesław Szadkowski
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland.
| | - Jacek Rogowski
- Institute of General and Ecological Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
| | - Waldemar Maniukiewicz
- Institute of General and Ecological Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
| | - Przemysław Rybiński
- Department of Management and Environmental Protection, Jan Kochanowski University, Zeromskiego 5, 25-369 Kielce, Poland.
| | - Mirosława Prochoń
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland.
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