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Chen L, Gao Y, He M, Liu Y, Teng F, Li Y. Magnetic nanoparticles-immobilized phospholipase LM and phospholipase 3G: Preparation, characterization, and application on soybean crude oil degumming. Int J Biol Macromol 2024; 279:135368. [PMID: 39243566 DOI: 10.1016/j.ijbiomac.2024.135368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 08/20/2024] [Accepted: 09/04/2024] [Indexed: 09/09/2024]
Abstract
Immobilization of enzymes improves their stability and recoverability and is therefore crucial for scientific research and industrial applications. In this study, phospholipase LM (PLLM) and phospholipase 3G (PL3G) were immobilized using Fe3O4@SiO2@CS-COOH polycarboxylated magnetic nanoparticles (MNPs-COOH) as carriers and then used for degumming soybean crude oil. The immobilization rates and relative enzyme activities of these immobilized phospholipases were evaluated to determine the optimal immobilization parameters. The enzyme activities of PLLM-MNPs-COOH and PL3G-MNPs-COOH were 2830.87 and 1162.25 U/g, respectively. Enzymatic properties of the free and immobilized enzymes were compared. Both immobilized phospholipases exhibited higher condition tolerance and stability after immobilization. After 30-day storage at 4 °C, both immobilized phospholipases retained approximately 1.3 times the residual activity of the corresponding free phospholipases. When the degumming conditions were optimized, the residual phosphorus contents of the PLLM-MNPs-COOH- and PL3G-MNPs-COOH-degummed oils were 4.91 and 7.41 mg/kg, respectively, which were consistent with the safety standards for oil products. After 6 cycles, PLLM-MNPs-COOH and PL3G-MNPs-COOH continued to preserve 71.88 % and 70.00 % of their initial activities, respectively. The immobilized phospholipases are thus suitable for degumming soybean crude oil, and the mixed enzymes exhibited better degumming potential.
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Affiliation(s)
- Le Chen
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Yiting Gao
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Mingyu He
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Yue Liu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Fei Teng
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
| | - Yang Li
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
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Rabieian M, Taghavijeloudar M. Simultaneously removal of PAHs from contaminated soil and effluent by integrating soil washing and advanced oxidation processes in a continuous system: Water saving, optimization and scale up modeling. WATER RESEARCH 2024; 256:121563. [PMID: 38581984 DOI: 10.1016/j.watres.2024.121563] [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: 12/08/2023] [Revised: 03/31/2024] [Accepted: 04/01/2024] [Indexed: 04/08/2024]
Abstract
Every year a large amount of clean water turns into contaminated effluent by soil washing (SW) process. The release of this effluent has become a growing environmental threat. In this study, a sustainable approach was developed for effective removal of PAHs from contaminated soil and the effluent by integrating SW and advanced oxidation processes (AOPs) in a continuous system. In the constructed continuous system, first small amount of clean water passed through the contaminated soil to remove PAHs. Then, the polluted effluent was treated by a quick AOPs and recycled for SW processes again and again until a complete removal of PHE be achieved. The performance of the continuous system was optimized and compared with batch system (no circulation) at lab scale. In addition, a scale up modeling was developed to predict the performance of continuous system at large scale. According to the results, under the optimum conditions: Tween 80 (TW80) = 6 g/L, ultrasonic = 160 kW, UV = 30 W, O3 = 5 g/h and TiO2 = 2 g/m2, the final PHE degradation efficiency of 98 % and 94 % were achieved by the continuous and batch systems after 130 and 185 min, respectively. The continuous system used 5 times less water volume than the batch system but resulted in better PAHs degradation. The scale up modeling revealed at large scale (100 kg soil), the continuous system could decrease the energy consumption and the required washing solution (water + TW80) up to 50 % and 80 %, respectively in comparison to the batch system. This work suggests a promising and practical approach for contaminated soil remediation without producing polluted water.
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Affiliation(s)
- Masoud Rabieian
- Department of Civil and Environmental Engineering, Faculty of Civil Engineering, Babol Noshirvani University of Technology, 47148-7313, Babol, Iran
| | - Mohsen Taghavijeloudar
- Department of Civil and Environmental Engineering, Seoul National University, 151-744, Seoul, South Korea.
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Wang W, Qin X, Wang X, Ma K, Wu Z, Si H, Zhang J. Sulfur vacancy-rich (α/β-CdS)/SiO 2 photocatalysts for enhanced visible-light-driven photocatalytic degradation of rhodamine B. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 345:123428. [PMID: 38286260 DOI: 10.1016/j.envpol.2024.123428] [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: 10/30/2023] [Revised: 01/16/2024] [Accepted: 01/21/2024] [Indexed: 01/31/2024]
Abstract
The development of highly efficient photocatalysts for visible-light-driven degradation of organic pollution is of great interest for wastewater purification. In this work, a sulfur vacancy-rich (α/β-CdS)/SiO2 (α: hexagonal & β: cubic) photocatalyst with a high catalytic activity was novelly synthesized on a nano-SiO2 carrier by the reaction of Cd2+ with a CS2 storage material (CS2SM) as sulfur source and crystalline modifiers. The dispersion of α/β-CdS on the nano-SiO2 carrier significantly enhanced the visible-light-driven catalytic activity of (α/β-CdS)/SiO2 photocatalyst, and 93.37 % rhodamine B (RhB) conversion was determined over 50 mg (α/β-CdS)/SiO2 photocatalyst for 30 mL 400 mg/L RhB solution at light intensity of 150 mW/cm2 and 298.15 K. After five cycle tests, the (α/β-CdS)/SiO2 photocatalyst still owned excellent visible-light-driven catalytic degradation stability (>90 %). The characterizations of morphology, functional groups, and photo-electrochemistry of (α/β-CdS)/SiO2 photocatalyst demonstrated that nano-SiO2 as a carrier played meaningful role in dispersing α/β-CdS and reducing agglomeration, thus increasing the active site of photocatalytic degradation reaction, and the presence of α/β hetero-phase junctions and sulfur vacancies allows the rapid separation of photo-generated carriers and inhibits photo-generated electron-holes recombination. Meanwhile, the electron paramagnetic resonance (EPR) and free radical masking test have also proved that the main active species is ·O2- for the oxidation of RhB. Therefore, the work is providing a new reference to the visible-light-driven degradation of wastewater with high RhB concentration at room temperature.
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Affiliation(s)
- Wenxue Wang
- Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China; Inner Mongolia Engineering Research Center for CO(2) Capture and Utilization, College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, 010051, China
| | - Xing Qin
- Inner Mongolia Engineering Research Center for CO(2) Capture and Utilization, College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, 010051, China
| | - Xiaoyu Wang
- Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Kai Ma
- Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Zhaojun Wu
- Inner Mongolia Engineering Research Center for CO(2) Capture and Utilization, College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, 010051, China
| | - Huayan Si
- Hebei Provincial Key Laboratory of Traffic Engineering Materials, School of Materials Science and Engineering, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China
| | - Jianbin Zhang
- Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China; Inner Mongolia Engineering Research Center for CO(2) Capture and Utilization, College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, 010051, China.
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Chen L, Gao T, Wu X, He M, Wang X, Teng F, Li Y. Polycarboxylate functionalized magnetic nanoparticles Fe 3O 4@SiO 2@CS-COOH: Preparation, characterization, and immobilization of bovine serum albumin. Int J Biol Macromol 2024; 260:129617. [PMID: 38266861 DOI: 10.1016/j.ijbiomac.2024.129617] [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: 11/14/2023] [Revised: 12/20/2023] [Accepted: 01/17/2024] [Indexed: 01/26/2024]
Abstract
Magnetic nanoparticles with increasing superparamagnetism and magnetic targeting have found widespread application in fields such as food and medicine. In this study, polycarboxylated magnetic nanoparticles (Fe3O4@SiO2@CS-COOH) were prepared by surface functionalizing iron tetraoxide (Fe3O4) nanoparticles with ethylenediaminetetraacetic acid (EDTA) as a modifier. The appropriate degree of functionalization modification was obtained by adjusting the EDTA concentration and the ratio of cross-linking agents. The prepared magnetic nanoparticles were analyzed with structural and property characterization. The results showed that the Fe3O4@SiO2@CS-COOH magnetic nanoparticles prepared with 4 % EDTA and cross-linking agents at a molar ratio of 3:4 were uniform in particle size, with an average size of roughly 7 nm, and possessed an abundant carboxylate content (310.8064 μmol/g) and a high magnetization intensity (35.05 emu/g). As a model protein, bovine serum albumin (BSA) was immobilized on the surface of magnetic particles. The largest amount of immobilized protein was 500.4376 mg BSA/g at pH 4.0 and no extra salt ions. According to molecular docking simulations, its immobilization was due to the interaction of amino and carboxyl groups at the Fe3O4@SiO2@CS-COOH/BSA interface. Fe3O4@SiO2@CS-COOH possesses a large number of carboxyl groups, strong protein immobilization, and magnetic responsiveness, which may have potential applications in biomedical and food fields.
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Affiliation(s)
- Le Chen
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Tian Gao
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Xixi Wu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Mingyu He
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Xiangyu Wang
- COFCO Nutrition and Health Research Institute Co., Ltd, No.4 Road, Future Science and Technology Park South, Beiqijia, Changping, Beijing 102209, China
| | - Fei Teng
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
| | - Yang Li
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
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Suo C, Li W, Luo S, Ma C, Liu S. Multisite photocatalytic depolymerization of lignin model compound utilizing full-spectrum light over magnetic microspheres. iScience 2023; 26:108167. [PMID: 37920663 PMCID: PMC10618704 DOI: 10.1016/j.isci.2023.108167] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/20/2023] [Accepted: 10/05/2023] [Indexed: 11/04/2023] Open
Abstract
Photocatalytic depolymerization is a high value-added approach for utilization of lignin. In this study, magnetic microspheres of FeCoRu@SiO2-TiO2 were synthesized by a co-precipitation method. Doping with CoOx and RuOx was used to improve the response to visible light, and doping with TiO2 was used to improve the response to ultraviolet light (λ < 380 nm). The lignin model compound depolymerization rate was >90%. The electron paramagnetic resonance results showed that the reaction occurred in two steps (aerobic phase and oxygen-free phase). Most of the O2- was produced in the first step by cleavage of C-O bonds. The second step was inhibited in an oxygen-free atmosphere. This research provides a valid method for enhancing the photocatalytic properties using full-spectrum light and exploring the lignin photocatalytic depolymerization mechanism. Further research is required to develop the catalyst properties and performance to produce radicals.
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Affiliation(s)
- Chengcheng Suo
- Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Wei Li
- Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Sha Luo
- Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Chunhui Ma
- Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Shouxin Liu
- Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
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Wu X, Zhou J, Liu Z, Shao W. Gentamicin Sulfate Grafted Magnetic GO Nanohybrids with Excellent Antibacterial Properties and Recyclability. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1416. [PMID: 37111001 PMCID: PMC10143482 DOI: 10.3390/nano13081416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 04/16/2023] [Accepted: 04/18/2023] [Indexed: 06/19/2023]
Abstract
In this study, magnetic graphene oxide (MGO) nanohybrids were first prepared by loading Fe3O4 NPs onto graphene oxide (GO). Then, GS-MGO nanohybrids were prepared by grafting gentamicin sulfate (GS) onto MGO directly using a simple amidation reaction. The prepared GS-MGO had the same magnetism as MGO. They exhibited excellent antibacterial ability against Gram-negative bacteria and Gram-positive bacteria. The GS-MGO had excellent antibacterial performance against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and Listeria monocytogenes (L. monocytogenes). When the addition concentration of GS-MGO was 1.25 mg/mL, the calculated bacteriostatic ratios against E. coli and S. aureus achieved 89.8% and 100%, respectively. For L. monocytogenes, only 0.05 mg/mL of GS-MGO had an antibacterial ratio as high as 99%. In addition, the prepared GS-MGO nanohybrids also exhibited excellent non-leaching activity with good recycling antibacterial ability. After eight times antibacterial tests, GS-MGO nanohybrids still exhibited an excellent inhibition effect on E. coli, S. aureus, and L. monocytogenes. Therefore, as a non-leaching antibacterial agent, the fabricated GS-MGO nanohybrid had dramatic antibacterial properties and also showed great recycling ability. Thus, it displayed great potential in the design of novel recycling antibacterial agents with non-leaching activity.
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Yang Z, Zhen Y, Feng Y, Jiang X, Qin Z, Yang W, Qie Y. Polyacrylonitrile@TiO 2 nanofibrous membrane decorated by MOF for efficient filtration and green degradation of PM2.5. J Colloid Interface Sci 2023; 635:598-610. [PMID: 36621109 DOI: 10.1016/j.jcis.2022.12.122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 12/09/2022] [Accepted: 12/21/2022] [Indexed: 12/25/2022]
Abstract
A systematic study was performed on PM2.5 filtration and photodegradation performance of polyacrylonitrile @TiO2/ zeolitic imidazolate framework-8(PTZ)hybrid membrane. The hybrid membrane was prepared by electrospinning technique and in situ Metal-organic frameworks (MOFs) synthesis. The optimized membrane maintained a good PM2.5 capture efficiency (greater than 99%) and a pressure drop of 34 Pa. The larger specific surface area and higher pore structure enhance the filter interception effect and electrostatic interaction, which can have high applications for the filtering of PM2.5. In addition, zeolitic imidazolate framework-8 (ZIF-8) is uniformly coated on the surface of polyacrylonitrile @ TiO2 (PT) nanofiber to form N-Ti-O bonds, thus reducing the reorganization of electron-hole pairs and improving the efficiency of photodegradation. Compared with PT, the hybrid structure formed by PTZ has a higher degradation efficiency for PM2.5 (increased from 66% to 85%). The produced PTZ membrane exhibits a promising future in the collection and green degradation of PM2.5.
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Affiliation(s)
- Zhengren Yang
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, PR China
| | - Yuhua Zhen
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, PR China
| | - Yao Feng
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, PR China
| | - Xiaolin Jiang
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, PR China
| | - Zheng Qin
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, PR China
| | - Wenjie Yang
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, PR China
| | - Yuanyue Qie
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, PR China
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