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Gao Q, Yang YQ, Nie HN, Wang BQ, Peng X, Wang N, Li JK, Rao JJ, Xue YL. Investigating the impact of ultrasound on the structural, physicochemical, and emulsifying characteristics of Dioscorin: Insights from experimental data and molecular dynamics simulation. Food Chem 2024; 453:139581. [PMID: 38754354 DOI: 10.1016/j.foodchem.2024.139581] [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: 03/12/2024] [Revised: 04/28/2024] [Accepted: 05/05/2024] [Indexed: 05/18/2024]
Abstract
This study investigated the impact of ultrasound treatment on dioscorin, the primary storage protein found in yam tubers. Three key factors, namely ultrasound power, duration, and frequency, were focused on. The research revealed that ultrasound-induced cavitation effects disrupted non-covalent bonds, resulting in a reduction in α-helix and β-sheet contents, decreased thermal stability, and a decrease in the apparent hydrodynamic diameter (Dh) of dioscorin. Additionally, previously hidden amino acid groups within the molecule became exposed on its surface, resulting in increased surface hydrophobicity (Ho) and zeta-potential. Under specific ultrasound conditions (200 W, 25 kHz, 30 min), Dh decreased while Ho increased, facilitating the adsorption of dioscorin molecules onto the oil-water interface. Molecular dynamics (MD) simulations showed that at lower frequencies and pressures, the structural flexibility of dioscorin's main chain atoms increased, leading to more significant fluctuations between amino acid residues. This transformation improved dioscorin's emulsifying properties and its oil-water interface affinity.
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Affiliation(s)
- Qi Gao
- College of Light Industry, Liaoning University, Shenyang 110036, China; Department of Regional Economic Development, Party School of Liaoning Provincial Party Committee, Shenyang 110161, China
| | - Yu-Qi Yang
- College of Light Industry, Liaoning University, Shenyang 110036, China
| | - Hao-Nan Nie
- College of Light Industry, Liaoning University, Shenyang 110036, China
| | - Bing-Qing Wang
- College of Light Industry, Liaoning University, Shenyang 110036, China
| | - Xue Peng
- College of Light Industry, Liaoning University, Shenyang 110036, China
| | - Ning Wang
- College of Light Industry, Liaoning University, Shenyang 110036, China
| | - Jiang-Kuo Li
- Tianjin Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, National Engineering and Technology Research Center for Preservation of Agricultural Products, Tianjin 300384, China
| | - Jia-Jia Rao
- Department of Plant Sciences, North Dakota State University, Fargo, ND 58108, USA
| | - You-Lin Xue
- College of Light Industry, Liaoning University, Shenyang 110036, China.
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Li C, Liu C, Shan Y, Lan T. Effects of low frequency ultrasound treatment on dissolved organic nitrogen removal by biological activated carbon: Critical insights into molecular characteristics, microbial traits, and metabolism. WATER RESEARCH 2024; 260:121924. [PMID: 38896885 DOI: 10.1016/j.watres.2024.121924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 05/22/2024] [Accepted: 06/10/2024] [Indexed: 06/21/2024]
Abstract
Drinking water treatment plants (DWTPs) in China that pioneered the biological activated carbon (BAC) process have reached 10 years of operation. There has been a renewed focus on biofiltration and the performance of old BAC filters for dissolved organic nitrogen (DON) has been poor, requiring replacement and regeneration of the BAC. Therefore, it is necessary to explore a cost-effective way to improve the water quality of the old BAC filters. To address this, low frequency ultrasound is proposed to enhance DON removal efficiency by BAC. In this study, bench and pilot tests were conducted to investigate the effect of low frequency ultrasound on DON removal by 10-year BAC. The results indicated that low frequency ultrasound significantly improved the DON removal rate increased from 15.83 % to 85.87 % and considerably inhibited the nitrogenous disinfection by-products (N-DBPs) formation potential, which was attributed to a decrease in the production of lipid-like, carbohydrate-like, and protein/amino sugar-like DON. The biomass on the BAC was significantly reduced after ultrasound treatment, and it decreased from 349.56∼388.98 nmol P/gBAC to 310.12∼377.63 nmol P/gBAC, enabling the biofilm thickness to decrease and the surface to become sparse and porous, which was conducive to oxygen and nutrients transfer. The Rhizobials associated with microbe-derived DON were stripped away during ultrasound treatment, which reduced microbe-derived DON associated with amino acids. Additionally, ultrasound regulated metabolic pathways, including amino acids, tricarboxylic acid (TCA) cycle, and nucleotide metabolism, to improve the osmotic pressure of the biofilm. In short, low frequency ultrasound treatment can enhance BAC biological properties and effectively remove DON and N-DBPs formation potentials, which provides a viable and promising strategy for improving the safety of drinking water in practice.
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Affiliation(s)
- Congcong Li
- College of Environment, Hohai University, Nanjing 210098, PR China; School of Water Conservancy and Environment, University of Jinan, Jinan 250022, Shandong, PR China
| | - Cheng Liu
- College of Environment, Hohai University, Nanjing 210098, PR China.
| | - Yiwen Shan
- College of Environment, Hohai University, Nanjing 210098, PR China
| | - Tong Lan
- College of Environment, Hohai University, Nanjing 210098, PR China
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Chen H, Xu H, Zhong C, Liu M, Yang L, He J, Sun Y, Zhao C, Wang D. Treatment of landfill leachate by coagulation: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169294. [PMID: 38110093 DOI: 10.1016/j.scitotenv.2023.169294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/06/2023] [Accepted: 12/09/2023] [Indexed: 12/20/2023]
Abstract
Landfill leachate is a seriously polluted and hazardous liquid, which contains a high concentration of refractory organics, ammonia nitrogen, heavy metals, inorganic salts, and various suspended solids. The favorable disposal of landfill leachate has always been a hot and challenging issue in wastewater treatment. As one of the best available technologies for landfill leachate disposal, coagulation has been studied extensively. However, there is an absence of a systematic review regarding coagulation in landfill leachate treatment. In this paper, a review focusing on the characteristics, mechanisms, and application of coagulation in landfill leachate treatment was provided. Different coagulants and factors influencing the coagulation effect were synthetically summarized. The performance of coagulation coupled with other processes and their complementary advantages were elucidated. Additionally, the economic analysis conducted in this study suggests the cost-effectiveness of the coagulation process. Based on previous studies, challenges and perspectives met by landfill leachate coagulation treatment were also put forward. Overall, this review will provide a reference for the coagulation treatment of landfill leachate and promote the development of efficient and eco-friendly leachate treatment technology.
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Affiliation(s)
- Hongni Chen
- School of Civil Engineering, Chang'an University, Xi'an 710061, China
| | - Hui Xu
- Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization, School of Materials and Environment, Guangxi Minzu University, Nanning 530006, China
| | - Chao Zhong
- School of Civil Engineering, Chang'an University, Xi'an 710061, China
| | - Mingjie Liu
- School of Civil Engineering, Chang'an University, Xi'an 710061, China
| | - Liwei Yang
- School of Civil Engineering, Chang'an University, Xi'an 710061, China
| | - Jiaojie He
- School of Civil Engineering, Chang'an University, Xi'an 710061, China
| | - Yan Sun
- School of Civil Engineering, Chang'an University, Xi'an 710061, China
| | - Chuanliang Zhao
- School of Civil Engineering, Chang'an University, Xi'an 710061, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Dongsheng Wang
- College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, China
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Qi Y, Yu F, Wang X, Wan N, Yang M, Wu Z, Li Y. Drying of wolfberry fruit juice using low-intensity pulsed ultrasound. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.110953] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Wang J, Shih Y, Wang PY, Yu YH, Su JF, Huang CP. Hazardous waste treatment technologies. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2019; 91:1177-1198. [PMID: 31433896 DOI: 10.1002/wer.1213] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 07/29/2019] [Accepted: 08/16/2019] [Indexed: 06/10/2023]
Abstract
This is a review of the literature published in 2018 on topics related to hazardous waste management in water, soils, sediments, and air. The review covers treatment technologies applying physical, chemical, and biological principles for contaminated water, soils, sediments, and air. PRACTITIONER POINTS: The management of waters, wastewaters, and soils contaminated by various hazardous chemicals including inorganic (e.g., oxyanions, salts, and heavy metals), organic (e.g., halogenated, pharmaceuticals and personal care products, pesticides, and persistent organic chemicals) was reviewed according to the technology applied, namely, physical, chemical and biological methods. Physical methods for the management of hazardous wastes including adsorption, coagulation (conventional and electrochemical), sand filtration, electrosorption (or CDI), electrodialysis, electrokinetics, membrane (RO, NF, MF), photocatalysis, photoelectrochemical oxidation, sonochemical, non-thermal plasma, supercritical fluid, electrochemical oxidation, and electrochemical reduction processes were reviewed. Chemical methods including ozone-based, hydrogen peroxide-based, persulfate-based, Fenton and Fenton-like, and potassium permanganate processes for the management of hazardous were reviewed. Biological methods such as aerobic, anaerobic, bioreactor, constructed wetlands, soil bioremediation and biofilter processes for the management of hazardous wastes, in mode of consortium and pure culture were reviewed.
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Affiliation(s)
- Jianmin Wang
- Department of Civil, Architectural, and Environmental Engineering, Missouri University of Science & Technology, Rolla, Missouri
| | - Yujen Shih
- Graduate Institute of Environmental Engineering, National Sun yat-sen University, Kaohsiung, Taiwan
| | - Po Yen Wang
- Department of Civil Engineering, Weidner University, Chester, Pennsylvania
| | - Yu Han Yu
- Department of Civil and Environmental Engineering, University of Delaware, Newark, Delaware
| | - Jenn Fang Su
- Department of Civil and Environmental Engineering, University of Delaware, Newark, Delaware
| | - Chin-Pao Huang
- Department of Civil and Environmental Engineering, University of Delaware, Newark, Delaware
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Wu X, Liu J, Zhu JJ. Sono-Fenton hybrid process on the inactivation of Microcystis aeruginosa: Extracellular and intracellular oxidation. ULTRASONICS SONOCHEMISTRY 2019; 53:68-76. [PMID: 30600211 DOI: 10.1016/j.ultsonch.2018.12.034] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 12/18/2018] [Accepted: 12/23/2018] [Indexed: 05/26/2023]
Abstract
For the first time, the inactivation of Microcystis aeruginosa using sono-Fenton process at low frequency high intensity (20 kHz, 0.42 W/mL) and high frequency low intensity (800 kHz, 0.07 W/mL) was investigated, respectively. 20 kHz sono-Fenton treatment successfully reduced cyanobacterial cell number from 4.19 × 106 cells/mL to 0.45 × 106 cells/mL within 5 min treatment. Alternatively, efficient performance of 800 kHz sono-Fenton process was observed to decrease Microcystis cell number to 2.33 × 106 cells/mL after 5 min inactivation, with lower energy cost. It was found that powerful 20 kHz sonication induced pore formation on the cell wall, leading to extracellular damage, while 800 kHz irradiation with low intensity triggered intracellular uptake of chemicals, suggesting endocytosis effects. Furthermore, sono-Fenton Processes were found to be affected by the concentrations of Fenton's reagent, and pre-sonication time. Although solo Fenton treatment released microcystins in water, the degradation of microcystin-LR were achieved using 20 and 800 kHz sono-Fenton processes, respectively. The results of this work showed that severe extracellular oxidation is the vital inactivation mechanism of 20 kHz sono-Fenton process, while the internal oxidation caused by intracellularly delivered Fenton reagents is suggested to be the main cause of 800 kHz sono-Fenton inactivation, leading to much lower energy cost. This work provides alternative methods to control harmful cyanobacteria in water towards effective treatment.
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Affiliation(s)
- Xiaoge Wu
- Environment Science and Engineering College, Yangzhou University, Yangzhou, Jiangsu 225009, China; State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China
| | - Junli Liu
- Environment Science and Engineering College, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Jun-Jie Zhu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China.
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Liu C, Chen DW, Ren YY, Chen W. Removal efficiency and mechanism of phycocyanin in water by zero-valent iron. CHEMOSPHERE 2019; 218:402-411. [PMID: 30476772 DOI: 10.1016/j.chemosphere.2018.11.101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 11/08/2018] [Accepted: 11/15/2018] [Indexed: 06/09/2023]
Abstract
The efficiencies and mechanism of phycocyanin removal from water by zero-valent iron (ZVI) were studied. The trend for dissolved organic nitrogen removal was similar to phycocyanin and the removal efficiency was high at ∼81% and 95%, respectively, in 90 min. The experimental results showed that the phycocyanin removal efficiency was higher at pH < 6, with an almost complete removal. However, only 68% was removed at pH 9. Within 30 min, the removal efficiency of phycocyanin for 1-4 tested cycles was reduced from 55.8% to 15.2%. Scanning electron microscopy and energy dispersive spectroscopy, Fourier transform infrared spectroscopy analysis and X-ray photoelectron spectroscopy were used to analyze the mechanisms of phycocyanin removal, which indicated that a small amount of phycocyanin was immobilized on the ZVI surface by adsorption. In addition, the main removal pathway was coagulation by dissolved iron ions. The Fe oxide formed in situ from ZVI had a higher removal efficiency than that in FeCl3, which can play improved roles in charge neutralization. The production of disinfection byproducts also decreased because of the decrease of precursors.
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Affiliation(s)
- Cheng Liu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China.
| | - Dan-Wen Chen
- College of Environment, Hohai University, Nanjing 210098, China
| | - Yuan-Yuan Ren
- College of Environment, Hohai University, Nanjing 210098, China
| | - Wei Chen
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
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Gao R, Ye F, Lu Z, Wang J, Li Shen X, Zhao G. A novel two-step ultrasound post-assisted lye peeling regime for tomatoes: Reducing pollution while improving product yield and quality. ULTRASONICS SONOCHEMISTRY 2018; 45:267-278. [PMID: 29705321 DOI: 10.1016/j.ultsonch.2018.03.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 03/25/2018] [Accepted: 03/30/2018] [Indexed: 06/08/2023]
Abstract
In this paper, the effects and mechanisms of a novel two-step tomato peeling method, hot lye with a post-assistance of ultrasound, were investigated. The present work aims to improve the environmental friendliness of the conventional hot lye tomato peeling method (10% w/v, 97 °C, 45 s). The results showed that 4% (w/v) lye treatment at 97 °C for 30 s with a post-assistance of a 31.97 W/L ultrasound treatment at 70 °C for 50 s achieved a 100% peelability. In this scenario, the peeling yield and lycopene content in the peeled product were significantly higher than the peeling yield and lycopene content with the conventional hot lye peeling method. The present two-step peeling method was concluded with a mechanism of chemico-mechanical synergism, in which the hot lye functions mainly in a chemical way while the ultrasound is a mechanical process. Especially from the lye side, this work first demonstrated that the lye penetrated across the tomato skin via a pitting model rather than evenly. The findings reported in this paper not only provide a novel tomato peeling method with significant environmental benefits but also discover new clues to the peeling mechanism using hot lye.
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Affiliation(s)
- Ruiping Gao
- College of Food Science, Southwest University, Chongqing 400715, People's Republic of China
| | - Fayin Ye
- College of Food Science, Southwest University, Chongqing 400715, People's Republic of China
| | - Zhiqiang Lu
- College of Food Science, Southwest University, Chongqing 400715, People's Republic of China
| | - Jiajia Wang
- College of Food Science, Southwest University, Chongqing 400715, People's Republic of China
| | - Xiao Li Shen
- School of Public Health, Zunyi Medical University, Zunyi 563000, Guizhou, People's Republic of China
| | - Guohua Zhao
- College of Food Science, Southwest University, Chongqing 400715, People's Republic of China; Chongqing Engineering Research Centre of Regional Foods, Chongqing 400715, People's Republic of China.
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