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Wang M, Yuan Y, Han Y, Qiao F, Li J, Yan H. Two-dimensional hydrophilic imprinted resin-graphene oxide composite for selective extraction and rapid determination of gibberellin traces in licorice samples. Food Chem 2024; 452:139553. [PMID: 38733687 DOI: 10.1016/j.foodchem.2024.139553] [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: 01/24/2024] [Revised: 04/27/2024] [Accepted: 05/01/2024] [Indexed: 05/13/2024]
Abstract
This study presents novel methodologies and materials for selectively and sensitively determining gibberellin traces in licorice to address food safety concerns. A novel hydrophilic imprinted resin-graphene oxide composite (HMIR-GO) was developed with fast mass transfer, high adsorption capacity, and exceptional aqueous recognition performance for gibberellin. Leveraging the advantages of molecular imprinting, hydrophilic resin synthesis, and rapid mass transfer characteristics of GO, HMIR-GO was employed as an adsorbent, showing resistance to matrix interference. Coupled with HPLC, a rapid and selective method for determining gibberellin was established. Under optimal conditions, the method exhibited a wide linear range (0.02-5.00 μg g-1, r = 0.9999), low detection limits (3.3 ng g-1), and satisfactory recoveries (92.0-98.4%), enabling the accurate and rapid detection of gibberellin in licorice. This study introduces a pioneering strategy for the selective extraction and determination of trace gibberellin levels, offering insights for similar applications in functional foods.
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Affiliation(s)
- Mingwei Wang
- Hebei Key Laboratory of Public Health Safety, College of Pharmaceutical Science, College of Chemistry and Materials Science, Hebei University, Baoding 071002, China; State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding 071002, China
| | - Yanan Yuan
- Hebei Key Laboratory of Public Health Safety, College of Pharmaceutical Science, College of Chemistry and Materials Science, Hebei University, Baoding 071002, China; State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding 071002, China
| | - Yehong Han
- Hebei Key Laboratory of Public Health Safety, College of Pharmaceutical Science, College of Chemistry and Materials Science, Hebei University, Baoding 071002, China; State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding 071002, China
| | - Fengxia Qiao
- College of Biochemical and Environmental Engineering, Baoding University, Baoding, 071002, China
| | - Jinliang Li
- Hebei Key Laboratory of Public Health Safety, College of Pharmaceutical Science, College of Chemistry and Materials Science, Hebei University, Baoding 071002, China
| | - Hongyuan Yan
- Hebei Key Laboratory of Public Health Safety, College of Pharmaceutical Science, College of Chemistry and Materials Science, Hebei University, Baoding 071002, China; State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding 071002, China.
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2
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Zainal ZS, Hoo P, Ahmad AL, Abdullah AZ, Ng Q, Shuit S, Enche Ab Rahim SK, Andas J. Plant-based calcium silicate from rice husk ash: A green adsorbent for free fatty acid recovery from waste frying oil. Heliyon 2024; 10:e26591. [PMID: 38404855 PMCID: PMC10884935 DOI: 10.1016/j.heliyon.2024.e26591] [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: 09/22/2023] [Revised: 02/14/2024] [Accepted: 02/15/2024] [Indexed: 02/27/2024] Open
Abstract
Driven by the urgent need for a solution to tackle the surge of rice husk (RH) and waste frying oil (WFO) waste accumulation at a global scale, this report highlights the use of calcium silicates (CS) extracted from acid-pre-treated rice husk ash (RHA) for free fatty acid (FFA) removal from WFO as conventional RHA shows limited FFA adsorption performance. A novel alkaline earth silicate extraction method from acid-pre-treated RHA was outlined. The structural and behavioural attributes of the synthesised CS were identified through BET, SEM-EDS, and XRD analyses and compared to those of RHA. Notable morphology and structural modification were determined, including reducing specific surface areas, mitigating from amorphous to crystalline structure with regular geometric forms, and detecting Si-O-Ca functional groups exclusive to CS adsorbents. A comparison study showed superior lauric acid (LA) adsorption performance by CS absorbents over acid-pre-treated RHA, with a significant increase from 0.0831 ± 0.0004 mmol LA/g to 2.5808 ± 0.0011 mmol LA/g after 60 min. Recognised as the best-performing CS adsorbent, CS-1.0 was used for further investigations on the effect of dosage, LA concentration, and temperature for efficient LA adsorption, with up to 100% LA removal and 5.6712 ± 0.0016 mmol LA/g adsorption capacity. The adsorption isotherm and kinetic studies showed LA adsorption onto CS-1.0 followed Freundlich isotherm with KF = 0.0598 mmol(1-1/n) L(1/n) g-1 & Qe,cal = 3.1696 mmol g-1 and intraparticle diffusion model with kid = 0.1250 mmol g-1 min0.5 & Ci = 0.9625 mmol g-1, indicating rapid initial adsorption and involvement of carboxylate end of LA and the calcium ions on the CS-1.0 in the rate-limiting step. The high equilibrium adsorption capacity and LA adsorption rate indicated that the proposed CS-1.0 adsorbent has excellent potential to recover FFA from WFO effectively.
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Affiliation(s)
- Zainor Syahira Zainal
- Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia
| | - Pengyong Hoo
- Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia
- Centre of Excellence for Frontier Materials Research (CFMR), Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia
| | - Abdul Latif Ahmad
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
| | - Ahmad Zuhairi Abdullah
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
| | - Qihwa Ng
- Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia
- Centre of Excellence for Frontier Materials Research (CFMR), Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia
| | - Siewhoong Shuit
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering & Science, Universiti Tunku Abdul Rahman, Sungai Long Campus, Jalan Sungai Long, Bandar Sungai Long, Cheras, 43000, Kajang, Selangor, Malaysia
| | - Siti Kartini Enche Ab Rahim
- Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia
- Centre of Excellence for Frontier Materials Research (CFMR), Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia
| | - Jeyashelly Andas
- Faculty of Applied Sciences, Universiti Teknologi MARA, Cawangan Perlis, Campus Arau, 02600, Perlis, Malaysia
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Lee JM, Kang M, Kim JS, Bae JY. Amine-Impregnated Dendritic Mesoporous Silica for the Adsorption of Formaldehyde. MICROMACHINES 2023; 15:30. [PMID: 38258149 PMCID: PMC10818587 DOI: 10.3390/mi15010030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/15/2023] [Accepted: 12/21/2023] [Indexed: 01/24/2024]
Abstract
To adsorb and remove formaldehyde, which is a harmful volatile organic chemical (VOC) detected indoors, an alkylamine was introduced into the substrate as a formaldehyde adsorbent. In this study, Tetraethylenepentaamine (TEPA) was introduced into the mesoporous silica using the amine impregnation method. Since the impregnated alkylamine can block the pores of the silica substrate, the pore size and pore volume are very important factors for its use as a substrate for an adsorbent. Focusing on the substrate's pore properties, Santa Barbara Amorphous-15 (SBA-15) was chosen as a conventional one-dimensional pore-structured mesoporous silica, and dendritic mesoporous silica (DMS) as a three-dimensional pore-structured mesoporous silica. To 1 g each of silica substrate DMS and SBA-15, 0, 0.5, 1.5, and 2.5 g of TEPA were introduced. A fixed concentration and amount of formaldehyde gas was flowed through the adsorbent and then the adsorbent was changed to the 2,4-Dinitrophenylhydrazine (2,4-DNPH) cartridge to adsorb the remaining formaldehyde. According to the methods recommended by the World Health Organization (WHO) and National Institute for Occupational Safety & Health (NIOSH), the formaldehyde captured by 2,4-DNPH was analyzed using high-performance liquid chromatography (HPLC). A comparison of DMS and SBA-15 in the amine impregnation method shows that not only surface area, but also large pore size and high pore volume, contribute to the formaldehyde adsorption ability.
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Affiliation(s)
- Ji Myeong Lee
- Department of Chemistry, Keimyung University, Daegu 42601, Republic of Korea; (J.M.L.); (M.K.)
| | - Misun Kang
- Department of Chemistry, Keimyung University, Daegu 42601, Republic of Korea; (J.M.L.); (M.K.)
| | - June-Seo Kim
- Division of Nanotechnology, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu 42988, Republic of Korea
| | - Jae Young Bae
- Department of Chemistry, Keimyung University, Daegu 42601, Republic of Korea; (J.M.L.); (M.K.)
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Li Y, Xu G, Chen J, Yu T, Miao P, Du Y. One-step synthesis of chiral molecularly imprinted polymer TiO 2 nanoparticles for enantioseparation of phenylalanine in coated capillary electrochromatography. Mikrochim Acta 2023; 190:279. [PMID: 37391671 DOI: 10.1007/s00604-023-05854-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 05/29/2023] [Indexed: 07/02/2023]
Abstract
A novel chiral molecularly imprinted polymer TiO2 nanoparticle was synthesized in one step for the enantioseparation of phenylalanine in coated capillary electrochromatography. To the author's knowledge, the chiral molecularly imprinted nanomaterials have still not been reported, to date. Chiral molecularly imprinted TiO2 nanomaterials (L-PHE@MIP(APTES-TEOS)@TiO2) were used as a chiral stationary phase to separate the phenylalanine enantiomers in coated capillary electrochromatography (CEC). The imprinted coating was prepared from L-phenylalanine (L-PHE) as the template, TiO2 nanoparticles (NPs) as the support substrate, 3-aminopropyltriethoxysilane (APTES) as the functional monomer, and tetraethyl silicate (TEOS) as the cross-linker. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used for the characterization of the L-PHE@MIP(APTES-TEOS)@TiO2@capillary. Fourier transform infrared spectra (FT-IR), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA) were employed for the characterization of the L-PHE@MIP(APTES-TEOS)@TiO2. The effects of the applied voltage, pH value, buffer concentration, and acetonitrile content were investigated experimentally to determine the optimum conditions for CEC. The best resolution for phenylalanine enantiomers by CEC reached a value of 3.48. In addition, the specific recognition effect of L-PHE@MIP(APTES-TEOS)@TiO2 on PHE enantiomers was studied by selective experiment. Finally, adsorption kinetic research, adsorption equilibrium isotherm study, and adsorption thermodynamic experiment were carried out to investigate the separation mechanism of PHE enantiomers with the L-PHE@MIP (APTES-TEOS)@TiO2@capillary, and the results were consistent with those of CEC experiments.
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Affiliation(s)
- Yuchen Li
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No. 24 Tongjiaxiang, Jiangsu, 210009, Nanjing, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, Nanjing, People's Republic of China
| | - Guangfu Xu
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No. 24 Tongjiaxiang, Jiangsu, 210009, Nanjing, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, Nanjing, People's Republic of China
| | - Jiaquan Chen
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No. 24 Tongjiaxiang, Jiangsu, 210009, Nanjing, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, Nanjing, People's Republic of China
| | - Tao Yu
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No. 24 Tongjiaxiang, Jiangsu, 210009, Nanjing, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, Nanjing, People's Republic of China
| | - Pandeng Miao
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No. 24 Tongjiaxiang, Jiangsu, 210009, Nanjing, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, Nanjing, People's Republic of China
| | - Yingxiang Du
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No. 24 Tongjiaxiang, Jiangsu, 210009, Nanjing, People's Republic of China.
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, Nanjing, People's Republic of China.
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Wang T, Cao W, Wang Y, Qu C, Xu Y, Li H. Surface modification of quartz sand: A review of its progress and its effect on heavy metal adsorption. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 262:115179. [PMID: 37356400 DOI: 10.1016/j.ecoenv.2023.115179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 06/13/2023] [Accepted: 06/21/2023] [Indexed: 06/27/2023]
Abstract
Quartz sand (SiO2) is a prevalent filtration medium, boasting wide accessibility, superior stability, and cost-effectiveness. However, its utility is often curtailed by its sleek surface, limited active sites, and swift saturation of adsorption sites. This review outlines the prevalent strategies and agents for quartz sand surface modification and provides a comprehensive analysis of the various modification reagents and their operative mechanisms. It delves into the mechanism and utility of surface-modified quartz sand for adsorbing heavy metal ions (HMIs). It is found that the reported modifiers usually form connections with the surface of quartz sand through electrostatic forces, van der Waals forces, pore filling, chemical bonding, and/or molecular entanglement. The literature suggests that these modifications effectively address issues inherent to natural quartz sand, such as its low superficial coarseness, rapid adsorption site saturation, and limited adsorption capacity. Regrettably, comprehensive investigations into the particle size, regenerative capabilities, and application costs of surface-modified quartz sand and the critical factors for its wider adoption are lacking in most reports. The adsorption mechanisms indicate that surface-modified quartz sand primarily removes HMIs from aqueous solutions through surface complexation, ion exchange, and electrostatic and gravitational forces. However, these findings were derived under controlled laboratory conditions, and practical applications for treating real wastewater necessitate overcoming further laboratory-scale obstacles. Finally, this review outlines the limitations of partially surface modified quartz sand and suggests potential venues for future developments, providing a valuable reference for the advancement of cost-effective, HMI-absorbing, surface-modified quartz sand filter media.
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Affiliation(s)
- Ting Wang
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541006, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China
| | - Weiyuan Cao
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541006, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China
| | - Yingqi Wang
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541006, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China
| | - Chao Qu
- Handan Environmental Monitoring Center Station, Handan 056000, China
| | - Yufeng Xu
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541006, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China; Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, China.
| | - Haixiang Li
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541006, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China.
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Facile Mesoporous Hollow Silica Synthesis for Formaldehyde Adsorption. Int J Mol Sci 2023; 24:ijms24044208. [PMID: 36835621 PMCID: PMC9966678 DOI: 10.3390/ijms24044208] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 02/01/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023] Open
Abstract
Formaldehyde emitted from household products is classified as a hazardous substance that can adversely affect human health. Recently, various studies related to adsorption materials for reducing formaldehyde have been widely reported. In this study, mesoporous and mesoporous hollow silicas with amine functional groups introduced were utilized as adsorption materials for formaldehyde. Formaldehyde adsorption characteristics of mesoporous and mesoporous hollow silicas having well-developed pores were compared based on their synthesis methods-with or without a calcination process. Mesoporous hollow silica synthesized through a non-calcination process had the best formaldehyde adsorption characteristics, followed by mesoporous hollow silica synthesized through a calcination process and mesoporous silica. This is because a hollow structure has better adsorption properties than mesoporous silica due to large internal pores. The specific surface area of mesoporous hollow silica synthesized without a calcination process was also higher than that synthesized with a calcination process, leading to a better adsorption performance. This research suggests a facile synthetic method of mesoporous hollow silica and confirms its noticeable potential as a support for the adsorption of harmful gases.
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Gomes WE, Corrêa AA, Beatto TG, Etchegaray A, Nogueira AB, Mendes RK. Removal of p-cresol using wash waters from lipopeptide production. ENVIRONMENTAL TECHNOLOGY 2023; 44:334-341. [PMID: 34407726 DOI: 10.1080/09593330.2021.1970821] [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: 05/28/2021] [Accepted: 08/11/2021] [Indexed: 06/13/2023]
Abstract
This work shows the efficiency of wash waters from lipopeptide production as a remediation strategy to treat urban water samples contaminated with p-cresol. The harvesting step in surfactin production involved a centrifugation step, generating a major soluble fraction and a fraction that is adsorbed to the biomass. The adsorbed fraction was recovered by washing steps. These wash waters containing lipopeptides (mostly surfactins), were successfully used to adsorb and solubilize p-cresol. The method of decontamination applied to an artificially contaminated natural water was monitored using a biosensor based on laccase/magnetic nanoparticles. Given the amount of surfactin within the wash water, the removal of p-cresol from artificially contaminated water was approximately 46.0%. This result confirms the successful and sustainable application of surfactin-rich wash waters to remove p-cresol from artificially contaminated natural water. The adsorption mechanism is potentially based on a multi-layer adsorption process, considering Langmuir and Freundlich adsorption isotherms.
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Affiliation(s)
- Wyllerson Evaristo Gomes
- Faculdade de Química, Centro de Ciências Exatas, Ambientais e de Tecnologias, Pontifícia Universidade Católica de Campinas (PUC-CAMPINAS), Campinas, Brasil
| | - Amanda Arthuzo Corrêa
- Faculdade de Química, Centro de Ciências Exatas, Ambientais e de Tecnologias, Pontifícia Universidade Católica de Campinas (PUC-CAMPINAS), Campinas, Brasil
| | - Thainá Godoy Beatto
- Faculdade de Química, Centro de Ciências Exatas, Ambientais e de Tecnologias, Pontifícia Universidade Católica de Campinas (PUC-CAMPINAS), Campinas, Brasil
| | - Augusto Etchegaray
- Faculdade de Química, Centro de Ciências Exatas, Ambientais e de Tecnologias, Pontifícia Universidade Católica de Campinas (PUC-CAMPINAS), Campinas, Brasil
| | - Alessandra Borin Nogueira
- Faculdade de Química, Centro de Ciências Exatas, Ambientais e de Tecnologias, Pontifícia Universidade Católica de Campinas (PUC-CAMPINAS), Campinas, Brasil
| | - Renata Kelly Mendes
- Faculdade de Química, Centro de Ciências Exatas, Ambientais e de Tecnologias, Pontifícia Universidade Católica de Campinas (PUC-CAMPINAS), Campinas, Brasil
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Neelamegam P, Muthusubramanian B. A classic critique on concrete adsorbing pollutants emitted by automobiles and statistical envision using trend analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:85969-85987. [PMID: 34415525 DOI: 10.1007/s11356-021-15962-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 08/09/2021] [Indexed: 06/13/2023]
Abstract
Globally, road transportation is responsible for about 1/3 of total air pollution, among which Co2 , NoX and SoX are major by volume which are directly responsible for ozone layer depletion. As these activities continue to rise, the nature faces the threat of an unprecedented environmental catastrophe. In this survey, the adsorbent and the methods used to adsorb the vehicle emission pollutant directly from the ambient air and enhance the air quality are reviewed. There are extensive number of adsorbents available namely titanium oxide, polyethyleneimine (PEI), activated carbon, and other natural admixtures and methods that adsorb these pollutants such as Co2; specifically, polyethyleneimine (PEI) is a polymer-based product which has a behavior of adsorbing Co2 directly from ambient air. A carbon-neutral technology for eliminating anthropogenic CO2 emissions has been proposed, trapping CO2 from the atmosphere. The major concern including Co2 adsorption rate and methods to evaluate the volume of adsorption with time has been reviewed. Trend analysis depends on the reason that can foresee what will occur later on by seeing what has happened beforehand. The trend analysis method was used in this study to model the adsorption rate of PEI based on their pore diameter. When it comes to designing regression analysis, R2 values of 0.2 to 0.3 indicate that statistical tests have no meaningful impact and further research is needed. For adsorption of NoX, a lot of adsorbents are used namely sodium bentonite, zeolite, activated carbon, and other natural minerals. Among them, activated carbon enhances the adsorption rate of Nox. Vast research has been conducted to analyze the adsorption rate, advantages, disadvantages, and the behavior of different adsorbent with the concrete. Literally for SOx, the adsorbents that are widely used are coal ash, copper oxide, and silicate. The characterization of different adsorbents with their adsorbate can be analyzed by some test methods as follows: Fourier-transform infrared spectroscopy (FTIR), BET analysis, scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM) analysis, surface area, X-ray diffraction (XRD), porosity analysis, and more according to the requirement. The quantity of adsorbent and adsorbate could be evaluated for facing the real-time constraints through a detailed research by review.
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Affiliation(s)
- Prakhash Neelamegam
- Department of Civil Engineering, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, 603203, India.
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Luo J, Peng J, Tang M, Zhang F, Miao G, Li G, Song C, Wang W, Xiao J. Effective adsorption of Ultra-dilute CO2 over Polyethyleneimine-based adsorbent for H2 purification. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Shang S, Liu Y, Liu M, Bai Y, Wang X, Wu B, Chen J, Dong J, Liu Y. Studying the adsorption mechanisms of nanoplastics on covalent organic frameworks via molecular dynamics simulations. JOURNAL OF HAZARDOUS MATERIALS 2022; 421:126796. [PMID: 34388925 DOI: 10.1016/j.jhazmat.2021.126796] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/25/2021] [Accepted: 07/29/2021] [Indexed: 06/13/2023]
Abstract
Covalent organic frameworks (COFs) with well-defined supramolecular structures and high surface-area-to-volume ratio have received extensive attention on their adsorption of contaminants from micro- to nano-size. Here, we studied the adsorption mechanisms of three typical nanoplastics (NP), including polyethylene (PE), nylon-6 (PA 6), and polyethylene terephthalate (PET) on chemically stable COFs (TpPa-X, X = H, CH3, OH, NO2 and F) by molecular dynamics simulations. Depending on molecular structure and surface composition, two distinct interactions-electrostatic interaction and van der Waals (vdW) interaction-are identified to be responsible for the adsorption of different NP pollutants on TpPa-X. The vdW interaction is dominant during the adsorption process, while polar groups in polymers and COFs can enhance the adsorption because of the electrostatic interaction. Compared with other functional COFs, we found that TpPa-OH shows the strongest adsorption with the NP pollutants employed in this study. This work reveals the COF-polymer adsorption behavior and properties at atomic scale, which is crucial to the development of promising COF materials to deal with NP pollution.
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Affiliation(s)
- Shengcong Shang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Youxing Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Minghui Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yichao Bai
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xinyu Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Bin Wu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Jianyi Chen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
| | - Jichen Dong
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yunqi Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
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11
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Study on the application of sulfonation catalysis in a new formaldehyde recovery process. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127593] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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12
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Ren Z, Zhao P, Zhang Y, Yang Y, Lyu X, Lu C. One-step fabrication of Pd-embedded hierarchically porous carbon micro-spheres for formaldehyde removal under mild conditions. NEW J CHEM 2021. [DOI: 10.1039/d1nj00198a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using the enclosed space of Pickering emulsion droplets as a template, we adopted a one-step strategy to prepare Pd and N co-doped multi-core layered porous carbon microspheres (Pd@NCMs-T) for room-temperature catalytic oxidation of HCHO.
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Affiliation(s)
- Zhigang Ren
- CAS Key Laboratory for Carbon Materials
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Peng Zhao
- CAS Key Laboratory for Carbon Materials
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Ye Zhang
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
- University of Chinese Academy of Sciences
| | - Yu Yang
- CAS Key Laboratory for Carbon Materials
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Xiaoxuan Lyu
- CAS Key Laboratory for Carbon Materials
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Chunxiang Lu
- CAS Key Laboratory for Carbon Materials
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
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Seaf El-Nasr TA, Gomaa H, Emran MY, Motawea MM, Ismail ARAM. Recycling of Nanosilica from Agricultural, Electronic, and Industrial Wastes for Wastewater Treatment. WASTE RECYCLING TECHNOLOGIES FOR NANOMATERIALS MANUFACTURING 2021:325-362. [DOI: 10.1007/978-3-030-68031-2_12] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Iron-Loaded Catalytic Silicate Adsorbents: Synthesis, Characterization, Electroregeneration and Application for Continuous Removal of 1-Butylpyridinium Chloride. Catalysts 2020. [DOI: 10.3390/catal10090950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This research proposes the application of iron-loaded sepiolite (S-Fe) as a catalytic adsorbent for the unreported 1-butylpyridinium chloride ([bpy] Cl) treatment in an aqueous medium. Initially, sepiolite was selected as an inexpensive and efficacious adsorbent for [bpy] Cl elimination. After that, sepiolite was loaded with iron for the subsequent electro-Fenton (EF) regeneration treatment. Once kinetic and isotherm studies were performed, providing respectively almost instantaneous adsorption (20 min) and an uptake of 22.85 mg/g, [bpy] Cl adsorption onto S-Fe was studied in continuous mode. The obtained breakthrough curve was analyzed using three standard breakthrough models, being Yoon–Nelson and Thomas the most suitable adjustments. Afterwards, S-Fe regeneration by the EF process was conducted using this iron-loaded silicate material as a heterogeneous catalyst. Under optimized operational conditions (current intensity 300 mA and Na2SO4 0.3 M), complete adsorbent regeneration was achieved in 10 h. The total mineralization of [bpy] Cl was reached within 24 h and among seven carboxylic acids detected, oxalic and acetic acids seem to be the primary carboxylic acids produced by [bpy] Cl degradation. Finally, S-Fe was efficiently used in four consecutive adsorption–regeneration cycles without a noticeable reduction in its adsorption capacity, opening a path for future uses.
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