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Ran T, Ji C, Zhang Q, Wang S, Zhang Y, Niu W, Wei T, Shi Y. Advanced treatment and reuse of dye wastewater using thermo-irreversible on/off switch starch with disruption of dissolution/precipitation dynamic equilibrium. Carbohydr Polym 2024; 342:122425. [PMID: 39048208 DOI: 10.1016/j.carbpol.2024.122425] [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: 04/14/2024] [Revised: 06/16/2024] [Accepted: 06/20/2024] [Indexed: 07/27/2024]
Abstract
The development of irreversible on/off switching materials is a potential strategy for unidirectional capture and encapsulation of pollutants, preventing the pollutant leakage problem resulting from the reversible dissolution of flocculants. Herein, a thermo-irreversible on/off switch starch (TISS) is prepared through modifying starch by etherification grafting glycidyl phenyl ether and 2,4-bis(dimethylamino)-6-chloro-[1,3,5]-triazine. It breaks the dissolution/precipitation dynamic equilibrium across heating-cooling cycles by thermal-induced irreversible coil-to-globule self-assembly of polymer chains, resulting in a 50-fold decrease in polymer solubility. Particularly, TISS shows a superior double-locking effect on pollutants and flocculants through its unique irreversible conformation memory capability, leading to a high-quality reuse water. 99.9 % of reactive brilliant red dye and 97.9 % of TISS remain fixed within sludge flocs even after prolonged immersion in cold water at 24 °C for 60 days. Furthermore, direct recycling and reuse of dye-bath energy can be realized through the isothermal flocculation and dyeing method, showing a 75 % decrease in energy consumption after three cycles compared to traditional dyeing techniques. This work presents a novel approach to constructing an irreversible pollutant delivery system using thermo-irreversible on/off switch starch, addressing the problems of high energy dissipation and water quality fluctuations during wastewater treatment.
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Affiliation(s)
- Tingmin Ran
- State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832000, China
| | - Chenchen Ji
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China.
| | - Qi Zhang
- Xinjiang Shenbang Environmental Engineering Co., Ltd, Shihezi 832000, China
| | - Shengxin Wang
- State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832000, China
| | - Yanxue Zhang
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China
| | - Wenbin Niu
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials, Dalian University of Technology, West Campus, 2 Linggong Rd., Dalian 116024, China
| | - Tingting Wei
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China.
| | - Yulin Shi
- State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832000, China; State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China.
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2
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Oladzadabbasabadi N, Abraham B, Ghasemlou M, Ivanova EP, Adhikari B. Green synthesis of non-isocyanate hydroxyurethane and its hybridization with carboxymethyl cellulose to produce films. Int J Biol Macromol 2024; 276:133617. [PMID: 38960219 DOI: 10.1016/j.ijbiomac.2024.133617] [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: 04/08/2024] [Revised: 06/20/2024] [Accepted: 06/30/2024] [Indexed: 07/05/2024]
Abstract
Non-isocyanate polyurethanes (NIPUs) have attracted increasing attention as a sustainable alternative to conventional isocyanate-based polyurethanes. This study synthesized non-isocyanate hydroxyurethanes (NIHUs) through an addition reaction between propylene carbonate (PC) and 1,2-ethylenediamine (EDA). The resulting NIHU was then hybridized with carboxymethyl cellulose (CMC) to investigate its hybridization potential. Structural analysis through FTIR, NMR, and XRD confirmed the crystalline nature of NIHU, featuring urethane bonds and abundant hydroxyl groups. It was found that NIHU and CMC interacted by forming hydrogen bonds between hydroxyl groups of NIHU and carboxyl groups of CMC, resulting in a dense CMC/NIHU hybrid structure. NMR and XRD analyses revealed changes in the hybrids' chain mobility, the Young's modulus of the hybrid with 30 % NIHU content decreased from 1627 MPa to 502 MPa relative to CMC, and the elongation at break increased from 4.44 % to 17.2 %. Increasing the concentration of NIHU in CMC reduced the hydrophobicity, in terms of water contact angle, from 70° to 41.7°. The simplicity of the synthesis method for NIHU, coupled with the desirable structure, strength, and balanced flexibility of CMC/NIHU hybrids, is expected to facilitate the production of NIHU-rich hybrids and increase their application in packaging.
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Affiliation(s)
| | - Billu Abraham
- School of Science, STEM College, RMIT University, Melbourne, VIC 3083, Australia; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Mehran Ghasemlou
- School of Science, STEM College, RMIT University, Melbourne, VIC 3083, Australia; Centre for Sustainable Bioproducts, Deakin University, Waurn Ponds, VIC 3216, Australia.
| | - Elena P Ivanova
- School of Science, STEM College, RMIT University, Melbourne, VIC 3083, Australia
| | - Benu Adhikari
- School of Science, STEM College, RMIT University, Melbourne, VIC 3083, Australia; Centre for Advanced Materials and Industrial Chemistry (CAMIC), RMIT University, Melbourne, VIC 3001, Australia
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3
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Almakimi A, Ben Ali A, Hussein IA, Bai B. Evaluation of Novel Preformed Particle Gel System for Conformance Control in Mature Oil Reservoirs. Gels 2024; 10:70. [PMID: 38247792 PMCID: PMC10815741 DOI: 10.3390/gels10010070] [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: 12/25/2023] [Revised: 01/14/2024] [Accepted: 01/15/2024] [Indexed: 01/23/2024] Open
Abstract
To address challenges associated with excessive water production in mature oil reservoirs, this study introduces a carboxymethyl cellulose (CMC)-based material as a novel preformed particle gel (PPG) designed to plug excessive water pathways and redistribute the subsequent injected water toward unswept zones. Through microwave-assisted grafting copolymerization of CMC with acrylamide (AM), we successfully generated multi-sized dry particles within the range of 250-800 µm. Comprehensive analyses, including Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), have confirmed the chemical composition and morphology of the resulting carboxymethyl cellulose-grafted crosslinked polyacrylamide (CMC/PAMBA). Swelling kinetics and rheology tests were conducted to confirm the ability of this novel PPG system to perform at different reservoir conditions. The results of core flooding experiments showed that the CMC/PAMBA PPG is capable of plugging open fractures with a water breakthrough pressure gradient of up to 144 psi/ft. This preformed particle gel (PPG) system was designed specifically for application in Middle East reservoirs, which are distinguished by high salinity and elevated temperature levels. This PPG system is able to swell up to 10 times its original size in seawater and maintain a strength of about 1300 Pa at a temperature of 80 °C. Further optimization is conceivable to enhance injection efficiency and achieve superior plugging outcomes.
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Affiliation(s)
- Abdulaziz Almakimi
- Petroleum Engineering Department, Missouri University of Science and Technology, Rolla, MO 65409, USA;
| | - Ahmed Ben Ali
- Gas Processing Center, Qatar University, Doha P.O. Box 2713, Qatar; (A.B.A.); (I.A.H.)
| | | | - Baojun Bai
- Petroleum Engineering Department, Missouri University of Science and Technology, Rolla, MO 65409, USA;
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Sharma R, Nath PC, Mohanta YK, Bhunia B, Mishra B, Sharma M, Suri S, Bhaswant M, Nayak PK, Sridhar K. Recent advances in cellulose-based sustainable materials for wastewater treatment: An overview. Int J Biol Macromol 2024; 256:128517. [PMID: 38040157 DOI: 10.1016/j.ijbiomac.2023.128517] [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: 11/11/2023] [Revised: 11/24/2023] [Accepted: 11/28/2023] [Indexed: 12/03/2023]
Abstract
Water pollution presents a significant challenge, impacting ecosystems and human health. The necessity for solutions to address water pollution arises from the critical need to preserve and protect the quality of water resources. Effective solutions are crucial to safeguarding ecosystems, human health, and ensuring sustainable access to clean water for current and future generations. Generally, cellulose and its derivatives are considered potential substrates for wastewater treatment. The various cellulose processing methods including acid, alkali, organic & inorganic components treatment, chemical treatment and spinning methods are highlighted. Additionally, we reviewed effective use of the cellulose derivatives (CD), including cellulose nanocrystals (CNCs), cellulose nano-fibrils (CNFs), CNPs, and bacterial nano-cellulose (BNC) on waste water (WW) treatment. The various cellulose processing methods, including spinning, mechanical, chemical, and biological approaches are also highlighted. Additionally, cellulose-based materials, including adsorbents, membranes and hydrogels are critically discussed. The review also highlighted the mechanism of adsorption, kinetics, thermodynamics, and sorption isotherm studies of adsorbents. The review concluded that the cellulose-derived materials are effective substrates for removing heavy metals, dyes, pathogenic microorganisms, and other pollutants from WW. Similarly, cellulose based materials are used for flocculants and water filtration membranes. Cellulose composites are widely used in the separation of oil and water emulsions as well as in removing dyes from wastewater. Cellulose's natural hydrophilicity makes it easier for it to interact with water molecules, making it appropriate for use in water treatment processes. Furthermore, the materials derived from cellulose have wider application in WW treatment due to their inexhaustible sources, low energy consumption, cost-effectiveness, sustainability, and renewable nature.
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Affiliation(s)
- Ramesh Sharma
- Department of Bio Engineering, National Institute of Technology Agartala, Jirania 799046, India
| | - Pinku Chandra Nath
- Department of Bio Engineering, National Institute of Technology Agartala, Jirania 799046, India; Department of Applied Biology, School of Biological Sciences, University of Science & Technology Meghalaya, Baridua 793101, India
| | - Yugal Kishore Mohanta
- Department of Applied Biology, School of Biological Sciences, University of Science & Technology Meghalaya, Baridua 793101, India; Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam 603103, India
| | - Biswanath Bhunia
- Department of Bio Engineering, National Institute of Technology Agartala, Jirania 799046, India
| | - Bishwambhar Mishra
- Department of Biotechnology, Chaitanya Bharathi Institute of Technology, Hyderabad 500075, India
| | - Minaxi Sharma
- Department of Applied Biology, School of Biological Sciences, University of Science & Technology Meghalaya, Baridua 793101, India
| | - Shweta Suri
- Amity Institute of Food Technology, Amity University Uttar Pradesh, Noida 201301, India
| | - Maharshi Bhaswant
- New Industry Creation Hatchery Center, Tohoku University, Sendai 980 8579, Japan
| | - Prakash Kumar Nayak
- Department of Food Engineering and Technology, Central Institute of Technology Kokrajhar, Kokrajhar 783370, India.
| | - Kandi Sridhar
- Department of Food Technology, Karpagam Academy of Higher Education (Deemed to be University), Coimbatore 641021, India.
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5
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Yang R, Su Y, Ren T, Li Y, Deng Y, Zheng C. Automatic and Matrix Interference-Free Acid-Base Titration by Coupling CO 2 Vapor Generation with Microplasma Carbon Optical Emission Spectrometry. Anal Chem 2023; 95:17238-17245. [PMID: 37966796 DOI: 10.1021/acs.analchem.3c02893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Acid-base titration of complex samples is conducive to the rapid evaluation of the degree and risk of environmental pollution to some extent. However, the traditional titration methods usually suffer from serious interference. Herein, an automatic acid-base titration method coupling miniature point discharge optical emission spectrometry (μPD-OES) with CO2 vapor generation was described for the precise, sensitive, and matrix interference-free acid-base titration of complex samples, particularly those with high color intensity, salinity, and turbidity such as wastewater and soil samples. In this work, acid-base titration was carried out in a chemical vapor generator where CO2 was generated through the addition of HCl or NaHCO3, thus enabling efficient separation of CO2 from a complex matrix. The generated CO2 was subsequently swept into the miniaturized point discharge for excitation and further detection by μPD-OES, where the carbon atomic emission at 193.0 nm was monitored. According to the consumed volume and concentration of HCl, accurate and automatic measurements of OH-, CO32-, and HCO3- can be accomplished. The proposed method possesses a high sensitivity of μPD-OES for the detection of CO2 with a relative standard deviation of below 3.0%. Moreover, the proposed system not only retains several unique advantages of accuracy, simplicity, and elimination of the use of complicated, expensive, and high power-consumption instruments but also alleviates the color and turbid interference from complex samples such as dyeing wastewater samples, oilfield water samples, and soil samples. It retains a promising potential application for titration analysis of other samples such as sludge, sediment, and landfill leachate.
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Affiliation(s)
- Rui Yang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yubin Su
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Tian Ren
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yuanyuan Li
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yurong Deng
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Chengbin Zheng
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
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6
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Ashwani PV, Gopika G, Arun Krishna KV, Jose J, John F, George J. Stimuli-Responsive and Multifunctional Nanogels in Drug Delivery. Chem Biodivers 2023; 20:e202301009. [PMID: 37718283 DOI: 10.1002/cbdv.202301009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 09/14/2023] [Accepted: 09/17/2023] [Indexed: 09/19/2023]
Abstract
Nanogels represent promising drug delivery systems in the biomedical field, designed to overcome challenges associated with standard treatment approaches. Stimuli-responsive nanogels, often referred to as intelligent materials, have garnered significant attention for their potential to enhance control over properties such as drug release and targeting. Furthermore, researchers have recently explored the application of nanogels in diverse sectors beyond biomedicine including sensing materials, catalysts, or adsorbents for environmental applications. However, to fully harness their potential as practical delivery systems, further research is required to better understand their pharmacokinetic behaviour, interactions between nanogels and bio distributions, as well as toxicities. One promising future application of stimuli-responsive multifunctional nanogels is their use as delivery agents in cancer treatment, offering an alternative to overcome the challenges with conventional approaches. This review discusses various synthetic methods employed in developing nanogels as efficient carriers for drug delivery in cancer treatment. The investigations explore, the key aspects of nanogels, including their multifunctionality and stimuli-responsive properties, as well as associated toxicity concerns. The discussions presented herein aim to provide the readers a comprehensive understanding of the potential of nanogels as smart drug delivery systems in the context of cancer therapy.
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Affiliation(s)
- P V Ashwani
- Bio-organic Laboratory, Department of Chemistry, Sacred Heart College, Kochi, 682013, India
| | - G Gopika
- Bio-organic Laboratory, Department of Chemistry, Sacred Heart College, Kochi, 682013, India
| | - K V Arun Krishna
- Bio-organic Laboratory, Department of Chemistry, Sacred Heart College, Kochi, 682013, India
| | - Josena Jose
- Bio-organic Laboratory, Department of Chemistry, Sacred Heart College, Kochi, 682013, India
| | - Franklin John
- Bio-organic Laboratory, Department of Chemistry, Sacred Heart College, Kochi, 682013, India
| | - Jinu George
- Bio-organic Laboratory, Department of Chemistry, Sacred Heart College, Kochi, 682013, India
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7
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Preparation of starch-acrylic acid-carboxymethyl cellulose copolymer and its flocculation performance towards methylene blue. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Gopal G, Natarajan C, Mukherjee A. Adsorptive removal of fluoroquinolone antibiotics using green synthesized and highly efficient Fe clay cellulose-acrylamide beads. ENVIRONMENTAL TECHNOLOGY & INNOVATION 2022; 28:102783. [DOI: 10.1016/j.eti.2022.102783] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
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9
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A Fast and Easy Probe Based on CMC/Eu (Ⅲ) Nanocomposites to Detect Acrylamide in Different Food Simulants Migrating from Food-Contacting Paper Materials. Polymers (Basel) 2022; 14:polym14173578. [PMID: 36080657 PMCID: PMC9460073 DOI: 10.3390/polym14173578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 08/23/2022] [Accepted: 08/26/2022] [Indexed: 11/17/2022] Open
Abstract
The residual acrylamide in food paper packaging can be transferred into water and food, which will cause harmful effects on human beings. In this paper, a rapid and easily available fluorescent probe based on carboxymethyl cellulose (CMC)/Eu (Ⅲ) nanocomposites was designed to detect the residue acrylamide with high sensibility. The probe could respond in 1 min. The concentration of acrylamide was linearly correlated to the fluorescence intensity of the probe at the emission wavelength of 615 nm in the concentration range of 0.1–100 μmol/L. The limit of detection (LOD) of the probe was 0.085 μg/L, which is lower than the guideline value of the European Union, the U.S. EPA, and the WHO. An experiment was performed to simulate the acrylamide migrating from food-contacting paper materials to different foods, including waterborne food, alcohol beverage, acidic food, and greasy food. The recoveries and RSDs of acrylamide in all samples indicated that the CMC/Eu (Ⅲ) fluorescent probe was efficient for acrylamide detection. The possible mechanism of the probe for acrylamide detection involved both dynamically quenching and static quenching by forming of non-fluorescent substances.
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10
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Ahmadi L, Ahmadi E, Mohamadnia Z. Demulsification of water in crude oil emulsions through magnetic nanocomposites decorated with poly(ionic liquid)s. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Yu X, Hu X, Cheng W, Zhao Y, Shao Z, Xue D, Wu M. Preparation and evaluation of humic acid-based composite dust suppressant for coal storage and transportation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:17072-17086. [PMID: 34655031 DOI: 10.1007/s11356-021-16685-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 09/19/2021] [Indexed: 06/13/2023]
Abstract
To mitigate environmental pollution caused by the escape of dust during coal storage and transportation, humic acid (HA) and grafted acrylamide (AM) were used as raw materials to prepare a composite dust suppressant suitable for coal storage and transportation. Single-factor experiments were used to explore the optimal synthesis conditions of the dust suppressant, and the microstructure of the product was studied using Fourier-transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance (1H-NMR), scanning electron microscopy (SEM), and other methods. The wetting effect of the dust suppressant on coal was also investigated by way of molecular dynamics (MD) simulations. The experimental results showed that the dust suppressant had good wind erosion resistance (wind erosion rate 10.2%), shock resistance (loss rate 3.63%), and anti-evaporation performance, while the MD simulation and permeability analysis results showed that the dust suppressant had an excellent wetting effect on the coal surface. SEM images revealed that the dust suppressant can fill the gaps between coal dust particles and bond them together to form a consolidated layer, thereby effectively inhibiting the escape of dust sources during coal storage and transportation.
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Affiliation(s)
- Xiaoxiao Yu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China
| | - Xiangming Hu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China.
- Key Lab of Mine Disaster Prevention and Control, College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China.
| | - Weimin Cheng
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China
- Key Lab of Mine Disaster Prevention and Control, College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China
| | - Yanyun Zhao
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China
| | - Zhiang Shao
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China
| | - Di Xue
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China
| | - Mingyue Wu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China
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12
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Ouyang K, Zhuang J, Chen C, Wang X, Xu M, Xu Z. Gradient Diffusion Anisotropic Carboxymethyl Cellulose Hydrogels for Strain Sensors. Biomacromolecules 2021; 22:5033-5041. [PMID: 34813283 DOI: 10.1021/acs.biomac.1c01003] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Recently, because of the unique properties of anisotropic and isotropic structures, there are more research studies on anisotropic hydrogels. We prepared a gradient anisotropic carboxymethyl cellulose hydrogel (CMC-Al3+) by directionally diffusing aluminum chloride solution. The orientation of carboxymethyl cellulose (CMC) chains is perpendicular to the direction of aluminum ion diffusion. The degree of cross-linking and orientation gradually decrease along the direction of aluminum ion diffusion. Compared with anisotropic hydrogels prepared by other methods, the hydrogels prepared by directionally diffusing aluminum ion solution have a gradient lamellar structure. Because of the large amount of aluminum ions in CMC-Al3+, the hydrogel shows good sensing performance. CMC-Al3+ is packaged with PVC electrical flame retardant tape to produce a strain sensor used to detect human tiny movements, which can accurately and stably monitor tiny movements. Hydrogel-based strain sensors can be widely used in the fields of human-computer intelligence, human-computer interaction, and wearable devices in the future.
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Affiliation(s)
- Kangwen Ouyang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China.,College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Jie Zhuang
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Chuchu Chen
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Xuerong Wang
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Mengting Xu
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Zhaoyang Xu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China.,College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
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13
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Cui G, Liu W, Wang L, Wu R, Bi C, Zhang D, Fan Y. Two novel Co (II) bifunctional MOFs: Syntheses and applications in photocatalytic degradation of dyes and electrocatalytic water oxidation. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122562] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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14
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Sun Y, Li D, Lu X, Sheng J, Zheng X, Xiao X. Flocculation of combined contaminants of dye and heavy metal by nano-chitosan flocculants. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 299:113589. [PMID: 34467861 DOI: 10.1016/j.jenvman.2021.113589] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 08/15/2021] [Accepted: 08/20/2021] [Indexed: 06/13/2023]
Abstract
In this study, two multifunctional nano-chitosan flocculants (CPAM-NCS1 and CPAM-NCS2) were made through the graft modification of cationic monomer and carboxymethylchitosan (CMCTS) to remove combined contaminants. The effects of various factors (pH, flocculant dosage and hydraulic mixing conditions) on the flocculation performance under single and composite pollution conditions were systematically investigated, the optimal chemical oxygen demand (COD) and the chromaticity removal rates in the dye wastewater were 79.9% and 83.9% at wastewater pH 7, the fast stirring rate 300 rpm, the fast stirring time 8 min, and the dosage of CPAM-NCS1 80 mg/L, respectively. The optimal removal rates of Cu (II) obtained by CPAM-NCS1 and CPAM-NCS2 at were 80.3% and 75.2% at 60 mg/L and the wastewater pH 7, respectively. The optimal removal rates of Cu (II) and disperse orange were 85.3% and 89.4%, respectively, in a composite pollutant system in which Cu (II) and disperse orange coexisted when the pH of the composite system was 9 and the dosage of CPAM -NCS1 was 60 mg/L. This study proved that nanoflocculants made by modifying CMCTS with different structures can demonstrate ideal flocculation removal performance for dye and heavy metal wastewaters.
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Affiliation(s)
- Yongjun Sun
- College of Urban Construction, Nanjing Tech University, Nanjing, 211800, China.
| | - Deng Li
- College of Urban Construction, Nanjing Tech University, Nanjing, 211800, China
| | - Xi Lu
- Jiangsu Key Laboratory of Industrial Water-Conservation & Emission Reduction, College of Environment, Nanjing Tech University, Nanjing, 211800, China
| | - Jinwei Sheng
- College of Urban Construction, Nanjing Tech University, Nanjing, 211800, China
| | - Xing Zheng
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Xuefeng Xiao
- College of Urban Construction, Nanjing Tech University, Nanjing, 211800, China
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15
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Wei L, Jinju M, Hongjian P, Zongwu W, Xinding Y. Synthesis of a polyamine-modified starch flocculant and its application. IRANIAN POLYMER JOURNAL 2021. [DOI: 10.1007/s13726-021-00921-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Aldajani M, Alipoormazandarani N, Kong F, Fatehi P. Acid hydrolysis of kraft lignin-acrylamide polymer to improve its flocculation affinity. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117964] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yu J, Wang L, Zhao Y, Zhou C. Preparation, characterization, and antibacterial property of carboxymethyl cellulose derivatives bearing tetrabutylammonium salt. Int J Biol Macromol 2021; 176:72-77. [PMID: 33577813 DOI: 10.1016/j.ijbiomac.2021.02.063] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 02/06/2021] [Accepted: 02/08/2021] [Indexed: 12/20/2022]
Abstract
Carboxymethyl cellulose derivatives bearing tetrabutylammonium moieties (CMC-TBA) were synthesized by the acidification of carboxymethyl cellulose (CMC) followed by acid-base neutralization with tetrabutylammonium hydroxide. The products were identified by Fourier transform infrared (FT-IR), 1H nuclear magnetic resonance (NMR) spectroscopy and the degrees of substitution (DS) values were also quantified according to the integral area values in 1H NMR spectra. It was revealed that DS values had a positive relationship with the molar ratios of TBAOH to CMC. The antibacterial behaviors against gram-positive bacteria S. aureus and gram-negative bacteria E. coli were investigated using serial two-fold dilution method (MIC and MBC) and the disc diffusion method (inhibition zone). The results showed that comparison with CMC, all new CMC-TBA derivatives exhibited high antibacterial activity that depends on bacteria type and their degrees of cationization. The antibacterial action was more effective against S. aureus than E. coli, which could be attributed to the fact that the latter has a complicated bilayer structure of cell wall. Besides, an apparent tendency that the antibacterial activity of CMC-TBA derivatives enhanced with an increase in the degrees of cationization was found. This work suggests that these new derivatives can be introduced as efficient antibacterial biomaterials for biomedical purposes.
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Affiliation(s)
- Jing Yu
- Department of Pharmacy, First Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, China
| | - Lingjiao Wang
- Department of Pharmacy, First Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, China
| | - Yuanyuan Zhao
- First Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, China.
| | - Chunhua Zhou
- Department of Pharmacy, First Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, China.
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Koshani R, Tavakolian M, van de Ven TGM. Cellulose-based dispersants and flocculants. J Mater Chem B 2020; 8:10502-10526. [PMID: 33136107 DOI: 10.1039/d0tb02021d] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Natural dispersants and flocculants, often referred to as dispersion stabilizers and liquid-solid separators, respectively, have secured a promising role in the bioprocessing community. They have various applications, including in biomedicine and in environmental remediation. A large fraction of existing dispersants and flocculants are synthesized from non-safe chemical compounds such as polyacrylamide and surfactants. Despite numerous advantages of synthetic dispersants and flocculants, issues such as renewability, sustainability, biocompatibility, and cost efficiency have shifted attention towards natural homologues, in particular, cellulose-based ones. Within the past decade, cellulose derivatives, obtained via chemical and mechanical treatments of cellulose fibrils, have successfully been used for these purposes. In this review article, by dividing the functional cellulosic compounds into "polymeric" and "nanoscale" categories, we provide insight into the engineering pathways, the structural frameworks, and surface chemistry of these "green" types of dispersants and flocculants. A summary of their efficiency and the controlling parameters is also accompanied by recent advances in their applications in each section. We are confident that the emergence of cellulose-based dispersing and flocculating agents will extend the boundaries of sustainable green technology.
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Affiliation(s)
- Roya Koshani
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, QC H3A 0B8, Canada. and Quebec Centre for Advanced Materials (QCAM) and Pulp and Paper Research Center, McGill University, 3420 University Street, Montréal, QC H3A 2A7, Canada.
| | - Mandana Tavakolian
- Quebec Centre for Advanced Materials (QCAM) and Pulp and Paper Research Center, McGill University, 3420 University Street, Montréal, QC H3A 2A7, Canada. and Department of Chemical Engineering, McGill University, 3610 University Street, Montréal, QC H3A 0C5, Canada
| | - Theo G M van de Ven
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, QC H3A 0B8, Canada. and Quebec Centre for Advanced Materials (QCAM) and Pulp and Paper Research Center, McGill University, 3420 University Street, Montréal, QC H3A 2A7, Canada.
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Feng X, Deng J, Wan J, He J, Huang Z, Yan A. Preparation of a hydrophobically associated cationic polyacrylamide and its regulation of the sludge dewatering performance. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 82:1350-1369. [PMID: 33079715 DOI: 10.2166/wst.2020.413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A hydrophobically associating cationic polyacrylamide (HACPAM) was prepared by using a micellar polymerization method with V-50 (azobisisobutyramidine hydrochloride) as the initiator and acrylamide, acryloyloxyethyl trimethylammonium chloride and butyl methacrylate as substrates under ultraviolet light irradiation. Structural analysis using Fourier transform infrared spectroscopy, proton nuclear magnetic resonance and X-ray photoelectron spectroscopy analyses showed that the substrates were successfully polymerized. HACPAM was used to condition sludge to improve its dewatering performance, and the results showed that as the amount of HACPAM increases, the sludge dewatering performance is significantly improved, and 3.532 kg/t dry solids of HACPAM is regarded as the optimal amount. Compared with the commercially available cationic polyacrylamide (CPAM), HACPAM has a stronger hydrophobic group association effect, with better promotion of the conversion of bound water in sludge flocs into free water, thereby improving the sewage dewatering performance. The 3D spatial structure of dewatered sludge cakes analyzed by computed tomography technology showed that the number of pores of the dewatered sludge cake treated by HACPAM 3 was smaller than that of the cake treated by CPAM, with a reduction in the porosity of 68.8%, resulting in a better hydrophobic effect. In addition, the mechanism of HACPAM improving the dewatering performance is discussed.
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Affiliation(s)
- Xin Feng
- Department of Eco-environmental Technology, Guangdong Industry Polytechnic, Guangzhou, China E-mail:
| | - Jinchuan Deng
- College of Environmental Science and Engineering, ZhongKai University of Agriculture and Engineering, Guangzhou, China
| | - Junjie Wan
- Department of Eco-environmental Technology, Guangdong Industry Polytechnic, Guangzhou, China E-mail:
| | - Jinqiang He
- Department of Eco-environmental Technology, Guangdong Industry Polytechnic, Guangzhou, China E-mail:
| | - Zhenjun Huang
- Department of Eco-environmental Technology, Guangdong Industry Polytechnic, Guangzhou, China E-mail:
| | - Aoqi Yan
- Department of Eco-environmental Technology, Guangdong Industry Polytechnic, Guangzhou, China E-mail:
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