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Gautam P, De AK, Rao MD, Sinha I, Behera CK, Singh KK. Waste remediation: Low-temperature synthesis of hybrid Cu(OH) 2/CuO and CuO nanostructures from spent printed circuit boards and their dye degradation studies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:41624-41637. [PMID: 37542015 DOI: 10.1007/s11356-023-29005-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 07/22/2023] [Indexed: 08/06/2023]
Abstract
The demand for environmentally friendly and sustainable resource utilization techniques for recycling waste printed circuit boards is significant due to their status as valuable secondary resources, containing high-purity copper and precious metals. In this context, Cu(OH)2/CuO and CuO nanostructures were fabricated using alkaline precipitation and low-temperature aging methods using the strip solution originated from laboratory-scale spent mobile phone printed circuit board recovery process. XRD, FTIR, FESEM-EDX, and TEM were utilized to characterize the as-recovered nanoproducts. A hybrid structure of Cu(OH)2/CuO was formed at 70°, and monoclinic CuO phase was formed at 80 °C aging time. The results show that Cu(OH)2/CuO nanoflakes have an average crystallite size of 24.06 nm and a particle width of 22 ± 3 nm. Cu(OH)2/CuO nanoflakes formed at 70 °C aging temperature and 24-h residence time have finer crystallite and particle sizes than CuO-ridged nanospheres formed at 80 °C aging temperature. The optical band gap energy of Cu(OH)2/CuO and CuO nanostructures formed was found to be 2.28 eV and 2.22 eV, respectively. The hybrid Cu(OH)2/CuO nanostructure photocatalyzed the decomposed 97.28% rhodamine blue using a visible light source, whereas the CuO nanostructure degraded only 14.64% rhodamine blue dye under similar conditions. A surfactant-less hybrid structure is developed without the use of any chemical precursor. Thus, a high value-added product is produced using one waste material to remove another waste in wastewater treatment.
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Affiliation(s)
- Pushpa Gautam
- Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University) Varanasi, Varanasi, 221005, India.
| | - Arup Kumar De
- Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University) Varanasi, Varanasi, 221005, India
| | | | - Indrajit Sinha
- Department of Chemistry, Indian Institute of Technology (Banaras Hindu University) Varanasi, Varanasi, 221005, India
| | - Chhail Kumar Behera
- Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University) Varanasi, Varanasi, 221005, India
| | - Kamalesh Kumar Singh
- Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University) Varanasi, Varanasi, 221005, India
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2
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Hou M, He Y, Yang X, Yang Y, Lin X, Feng Y, Kan H, Hu H, He X, Liu C. Preparation of Biomass Biochar with Components of Similar Proportions and Its Methylene Blue Adsorption. Molecules 2023; 28:6261. [PMID: 37687090 PMCID: PMC10488929 DOI: 10.3390/molecules28176261] [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: 07/24/2023] [Revised: 08/20/2023] [Accepted: 08/22/2023] [Indexed: 09/10/2023] Open
Abstract
Rapeseed straw, bagasse, and walnut peel have a large amount of resource reserves, but there are few technologies for high value-added utilization. In the research of biochar, walnut green husk is rarely used as raw material. In addition, the three main components of biomass (lignin, cellulose, and hemicellulose) are present in similar proportions, and the differences between the physical and chemical properties of biochar prepared with similar amounts of biomass raw materials are not clear. Using three kinds of biomass of the same quality as raw materials, biochar was prepared via pyrolysis at 400 °C, and activated carbon was prepared via CO2 activation at 800 °C. The results showed that the pore numbers of the three kinds of biochar increased after activation, resulting in the increase of the specific surface area. The resulting numbers were 352.99 m2/g for sugarcane bagasse biochar (SBB)-CO2, 215.04 m2/g for rapeseed straw biochar (RSB)-CO2, and 15.53 m2/g for walnut green husk biochar (WGB)-CO2. Ash increased the amount of carbon formation, but a large amount of ash caused biochar to form a perforated structure and decreased the specific surface area (e.g., WGB), which affected adsorption ability. When the three main components were present in similar proportions, a high content of cellulose and lignin was beneficial to the preparation of biochar. The adsorption value of MB by biochar decreased with the increase of biomass ash content. After activation, the maximum adsorption value of MB for bagasse biochar was 178.17 mg/g, rapeseed straw biochar was 119.25 mg/g, and walnut peel biochar was 85.92 mg/g when the concentration of methene blue solution was 300 mg/L and the biochar input was 0.1 g/100 mL at room temperature. The adsorption of MB by biochar in solution occurs simultaneously with physical adsorption and chemical adsorption, with chemical adsorption being dominant. The optimal MB adsorption by SBB-CO2 was dominated by multimolecular-layer adsorption. This experiment provides a theoretical basis for the preparation of biochar and research on its applications in the future.
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Affiliation(s)
- Min Hou
- National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forestry Resources, Southwest Forestry University, Kunming 650224, China; (M.H.); (Y.H.); (X.Y.); (Y.Y.); (X.L.); (Y.F.); (H.K.); (H.H.)
- Yunnan Academy of Forestry and Grassland, Kunming 650201, China
| | - Yudan He
- National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forestry Resources, Southwest Forestry University, Kunming 650224, China; (M.H.); (Y.H.); (X.Y.); (Y.Y.); (X.L.); (Y.F.); (H.K.); (H.H.)
| | - Xuewen Yang
- National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forestry Resources, Southwest Forestry University, Kunming 650224, China; (M.H.); (Y.H.); (X.Y.); (Y.Y.); (X.L.); (Y.F.); (H.K.); (H.H.)
| | - Yuchun Yang
- National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forestry Resources, Southwest Forestry University, Kunming 650224, China; (M.H.); (Y.H.); (X.Y.); (Y.Y.); (X.L.); (Y.F.); (H.K.); (H.H.)
- Lincang Academy of Forestry Sciences, Lincang 677000, China
| | - Xu Lin
- National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forestry Resources, Southwest Forestry University, Kunming 650224, China; (M.H.); (Y.H.); (X.Y.); (Y.Y.); (X.L.); (Y.F.); (H.K.); (H.H.)
| | - Yongxing Feng
- National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forestry Resources, Southwest Forestry University, Kunming 650224, China; (M.H.); (Y.H.); (X.Y.); (Y.Y.); (X.L.); (Y.F.); (H.K.); (H.H.)
- Yunnan Academy of Forestry and Grassland, Kunming 650201, China
| | - Huan Kan
- National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forestry Resources, Southwest Forestry University, Kunming 650224, China; (M.H.); (Y.H.); (X.Y.); (Y.Y.); (X.L.); (Y.F.); (H.K.); (H.H.)
| | - Huirong Hu
- National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forestry Resources, Southwest Forestry University, Kunming 650224, China; (M.H.); (Y.H.); (X.Y.); (Y.Y.); (X.L.); (Y.F.); (H.K.); (H.H.)
| | - Xiahong He
- National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forestry Resources, Southwest Forestry University, Kunming 650224, China; (M.H.); (Y.H.); (X.Y.); (Y.Y.); (X.L.); (Y.F.); (H.K.); (H.H.)
| | - Can Liu
- National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forestry Resources, Southwest Forestry University, Kunming 650224, China; (M.H.); (Y.H.); (X.Y.); (Y.Y.); (X.L.); (Y.F.); (H.K.); (H.H.)
- Lincang Academy of Forestry Sciences, Lincang 677000, China
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3
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Abdelbasir SM, Rayan DA, Ismail MM. Synthesis of Cu and CuO nanoparticles from e-waste and evaluation of their antibacterial and photocatalytic properties. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:89690-89704. [PMID: 37458881 PMCID: PMC10412494 DOI: 10.1007/s11356-023-28437-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 06/21/2023] [Indexed: 08/11/2023]
Abstract
Waste printed circuit boards (WPCBs) contain a plethora of valuable metals, considered an attractive secondary resource. In the current research, a hydrometallurgical process combined ammonia/ammonium chloride leaching and reduction (using L-ascorbic acid) to recover copper and its oxide (CuO) as nanosized particles from WPCBs was investigated. The results of leaching indicated that 96.7% of copper could be recovered at a temperature of 35 °C for a leaching duration of 2 h with ammonium chloride and ammonia concentration of 2 mol/L at a solid:liquid ratio of 1:10 g/cm3. The synthesized particles exhibit spherical and distorted sphere morphology with average particle size of 460 nm and 50 nm for Cu and CuO NPs, respectively. The antibacterial activity of Cu, CuO, and a (1:1) blend of both (Cu/CuO) has been examined against five different bacterial and fungal strains. The highest zone of inhibition was measured as 21.2 mm for Cu NPs toward Escherichia coli and 16.7 mm for Cu/CuO blend toward Bacillus cereus bacteria. The highest zone of inhibition was measured as 13 mm and 13.8 mm for Cu/CuO blend toward Fusarium proliferatum and Penicillium verrucosum fungi. Cu/CuO blend showed notable photocatalytic activity towards Rhodamine B dye under visible light irradiation with 96% degradation rate within 120 min. Using the process developed in this study, copper and its oxide as nanoparticles can be produced from WPCBs and used for multifunctional applications.
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Affiliation(s)
- Sabah M Abdelbasir
- Central Metallurgical R&D Institute (CMRDI), P.O. Box 87, Helwan, Cairo, 11421, Egypt.
| | - Diaa A Rayan
- Central Metallurgical R&D Institute (CMRDI), P.O. Box 87, Helwan, Cairo, 11421, Egypt
- Department of Physics, Deraya University, New Minya, Minya, Egypt
| | - Mahmoud M Ismail
- Physics Department, Faculty of Science, Al-Azhar Unversity, Nasr City, Cairo, 11884, Egypt
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Meena PL, Poswal K, Surela AK, Meena KS, Mordhiya B. Ag 2O-adorned ZnO nanostructures: cooperative and sustainable nanomaterial system for effective reduction and mineralization of hazardous water pollutants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:68770-68791. [PMID: 37129819 DOI: 10.1007/s11356-023-27215-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 04/21/2023] [Indexed: 05/03/2023]
Abstract
Organic water pollutants like nitroaromatics and synthetic dyes are causing serious threats to water. Ever-growing urban and industrial activities along with population explosion are rapidly contributing severe level of water contamination. Semiconducting nanomaterial-based photocatalysis has been proven to be an effective process for degradation of organic water pollutants. In the current study, visible light active Ag2O-adorned ZnO nanostructures were fabricated by a simple two-step hydrothermal method and the prepared nanostructures were utilized for the photocatalytic mineralization of rhodamine B (RhB) dye with visible light radiation. The catalytic potential of as-synthesized nanostructures was also investigated for the reduction of nitroaromatics (4-NP and 4-NA) and RhB dye in the presence of NaBH4. The Ag2O-adorned ZnO nanostructures prepared with 5% of silver nitrate denoted as ZnO/Ag2O (5%) demonstrated stupendous photomineralization activity against RhB dye as almost 100% degradation of RhB dye was achieved within 100 min of reaction time at pH = 6. The kinetic study revealed that the degradation reaction followed the pseudo-first-order kinetics and the kinetic rate constant (k) of photodecolorization reaction for optimal catalyst was calculated to be 61.4 × 10-3 min-1. The nanostructures revealed excellent recyclability and photostability as 95% activity of the catalyst was preserved even after the fifth cyclic run. The catalytic reduction of the 4-NP, 4-NA, and RhB dye was completed in 21, 12, and 40 min, respectively, in the presence of ZnO/Ag2O (5%) and NaBH4 solution. The kinetic rate constant values for the reduction reactions were determined to be 229.6 × 10-3, 454.2 × 10-3, and 105.5 × 10-3 min-1 for 4-NP, 4-NA, and RhB dye, respectively. Thus, the obtained results suggest that the components of the prepared nanosystem help in mutually strengthening the catalytic and photocatalytic abilities of each other, indicating the development of a cooperative and sustainable nanomaterial system in the current study.
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Affiliation(s)
| | - Krishna Poswal
- Department of Chemistry, University of Rajasthan, Jaipur, 302004, India
| | - Ajay Kumar Surela
- Department of Chemistry, University of Rajasthan, Jaipur, 302004, India
| | - Kamod Singh Meena
- Department of Chemistry, M.L.V. Govt. College, Bhilwara, 311001, India
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5
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Li B, Wang J, Luo Z, Wang J, Cai Z, Ge F. Facile and binder-free fabrication of deep colors on cotton fabrics with hand-feel enhancement via screen printing. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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6
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Kandhasamy N, Preethi LK, Mani D, Walczak L, Mathews T, Venkatachalam R. RGO nanosheet wrapped β-phase NiCu 2S nanorods for advanced supercapacitor applications. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:18546-18562. [PMID: 36215010 DOI: 10.1007/s11356-022-23359-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
A new integration strategy of transition metal sulfide with carbon-based materials is used to boost its catalytic property and electrochemical performances in supercapacitor application. Herein, crystalline reduced graphene oxide (rGO) wrapped ternary metal sulfide nanorod composites with different rGO ratios are synthesized using hydrothermal technique and are compared for their physical, chemical, and electrochemical performances. It is found that their properties are tuned by the weight ratios of rGO. The electrochemical investigations reveal that β-NiCu2S/rGO nanocomposite electrode with 0.15 wt.% of rGO is found to possess maximum specific capacitance of 1583 F g-1 at current density of 15 mA g-1 in aqueous electrolyte medium. The same electrode shows excellent cycling stability with capacitance retention of 89% after 5000 charging/discharging cycles. The reproducibility test performed on NiCu2S/rGO nanocomposite electrode with 0.15 wt.% of rGO indicates that it has high reproducible capacitive response and rate capability. Thus, the present work demonstrates that the β-NiCu2S/rGO nanocomposite can serve as a potential electrode material for developing supercapacitor energy storage system.
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Affiliation(s)
- Narthana Kandhasamy
- Centre for Nano Science and Nanotechnology, K.S. Rangasamy College of Technology, Tiruchengode, Tamil Nadu, 637215, India
| | - Laguduva K Preethi
- Centre for Nanoscience and Nanotechnology, Sathyabama Institute of Science and Technology (Deemed to Be University), Chennai, Tamil Nadu, 600119, India
| | - Devendiran Mani
- Central Instrumentation Laboratory, Vels Institute of Science Technology and Advanced Studies (VISTAS), Chennai, Tamil Nadu, 600117, India
| | - Lukasz Walczak
- Science & Research Division, PREVAC Sp. Z O.O, 44-362, Rogow, Poland
| | - Tom Mathews
- Surface and Nanoscience Division, Materials Science Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam, 603102, India
| | - Rajendran Venkatachalam
- Centre for Nano Science and Nanotechnology, K.S. Rangasamy College of Technology, Tiruchengode, Tamil Nadu, 637215, India.
- Department of Physics, Dr. N. G. P. Arts and Science College, Coimbatore, Tamil Nadu, 641048, India.
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7
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Yang T, Liu X, Zeng Z, Wang X, Zhang P, Feng B, Tian K, Qing T. Efficient and recyclable degradation of organic dye pollutants by CeO 2@ZIF-8 nanozyme-based non-photocatalytic system. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 316:120643. [PMID: 36372366 DOI: 10.1016/j.envpol.2022.120643] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/06/2022] [Accepted: 11/09/2022] [Indexed: 06/16/2023]
Abstract
Advanced oxidation processes-based catalysis system as the most typical pollutant degradation technology always suffer from poor durability and photo-dependent. Inspired by the fact that some nanomaterials exhibit catalytic properties closer to natural enzymes, a high peroxidase-like activity and stability CeO2@ZIF-8 nanozyme was synthesized in this study for non-photodegradation of dyes pollution. Multiple characterization techniques were applied to prove the successful synthesis of the nanozyme. The influence of different parameters on the catalytic degradation of organic dye by nanozyme was investigated. This nanozyme achieved a maximum degradation efficiency of 99.81% for methyl orange and maintained its catalytic performance in repeated experiments. Possible degradation intermediates and pathways for methyl orange were then proposed. In addition, the CeO2@ZIF-8 loaded starch/agarose films were prepared for the portable and recyclable remediation of real dye wastewater, which maintained more than 80% degradation efficiency after 5 successive cycles. These results suggested that nanozyme based non-photocatalytic system is a potential catalyst for dye degradation and it opens a new avenue to develop high-performance and recyclable catalysts for pollutant remediation.
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Affiliation(s)
- Tianhui Yang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Xiaofeng Liu
- Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Xiangtan, 411105, China
| | - Zihang Zeng
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Xujun Wang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Peng Zhang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Bo Feng
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Ke Tian
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Taiping Qing
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China.
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8
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Adsorption of Pb (II) ions from Aqueous Solution Using CuO-ZnO Nanocomposites. CHEMISTRY AFRICA 2022. [DOI: 10.1007/s42250-022-00554-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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9
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Pham TD, Truong TTT, Nguyen HL, Hoang LBL, Bui VP, Tran TTM, Dinh TD, Le TD. Synthesis and Characterization of Novel Core-Shell ZnO@SiO 2 Nanoparticles and Application in Antibiotic and Bacteria Removal. ACS OMEGA 2022; 7:42073-42082. [PMID: 36440119 PMCID: PMC9685607 DOI: 10.1021/acsomega.2c04226] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 10/26/2022] [Indexed: 06/15/2023]
Abstract
A novel core-shell nanomaterial, ZnO@SiO2, based on rice husk for antibiotic and bacteria removal, was successfully fabricated. The ZnO@SiO2 nanoparticles were characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), photoluminescence spectroscopy (PL), Brunauer-Emmett-Teller (BET) method, diffuse reflectance ultraviolet-vis (DR-UV-vis) spectroscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and ζ-potential measurements. β-Lactam antibiotic amoxicillin (AMX) was removed using ZnO@SiO2 nanoparticles with an efficiency greater than 90%, while Escherichia coli removal was higher than 91%. The optimum effective conditions for AMX removal using ZnO@SiO2, including solution pH, adsorption time, and ZnO@SiO2 dosage, were 8, 90 min, and 25 mg/mL, respectively. The maximum adsorption capacity reached 52.1 mg/g, much higher than those for other adsorbents. Adsorption isotherms of AMX on ZnO@SiO2 were more in accordance with the Freundlich model than the Langmuir model. The electrostatic attraction between negative species of AMX and the positively charged ZnO@SiO2 surface induced adsorption, while the removal of E. coli was governed by both electrostatic and hydrophobic interactions. Our study demonstrates that ZnO@SiO2 based on rice husk is a useful core-shell nanomaterial for antibiotic and bacteria removal from water.
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Affiliation(s)
- Tien-Duc Pham
- Faculty
of Chemistry, University of Science, Vietnam
National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi100000, Vietnam
| | - Thi-Thuy-Trang Truong
- Faculty
of Chemistry, University of Science, Vietnam
National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi100000, Vietnam
| | - Ha-Linh Nguyen
- HUS
High School for Gifted Students, University of Science, Vietnam National University, Hanoi, 182 Luong The Vinh, Thanh Xuan, Hanoi100000, Vietnam
| | - Ly-Bao-Long Hoang
- HUS
High School for Gifted Students, University of Science, Vietnam National University, Hanoi, 182 Luong The Vinh, Thanh Xuan, Hanoi100000, Vietnam
| | - Viet-Phuong Bui
- Faculty
of Chemistry, University of Science, Vietnam
National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi100000, Vietnam
| | - Thi-Tra-My Tran
- Faculty
of Chemistry, University of Science, Vietnam
National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi100000, Vietnam
| | - Thi-Diu Dinh
- Faculty
of Environmental Science, University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai, Thanh Xuan, Hanoi100000, Vietnam
| | - Thi-Dung Le
- Faculty
of Chemistry, University of Science, Vietnam
National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi100000, Vietnam
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10
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Peng D, Zhang S, Wang K, Dong T, Zhang M, Dong G. Preparation of a Chitosan/Coal Gasification Slag Composite Membrane and Its Adsorption and Removal of Cr (VI) and RhB in Water. Molecules 2022; 27:7173. [PMID: 36363999 PMCID: PMC9656432 DOI: 10.3390/molecules27217173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 10/16/2022] [Accepted: 10/20/2022] [Indexed: 10/15/2023] Open
Abstract
At present, there are many kinds of pollutants, including dyes and heavy metal ions, in wastewater. It is very important to develop adsorbents that can simultaneously remove heavy metal ions and dyes. In this study, a renewable composite membrane material was synthesized using chitosan and treated coal gasification slag. The Cr (VI) maximum adsorption capacity of the composite membrane was 50.0 mg/L, which was 4.3~8.8% higher than that of the chitosan membrane. For the adsorption of RhB, the removal rate of the chitosan membrane was only approximately 5.0%, but this value could be improved to 95.3% by introducing coal gasification slag. The specific surface area of the chitosan membrane could also be increased 16.2 times by the introduction of coal gasification slag. This is because coal gasification slag could open the nanopores of the chitosan membrane (from 80 μm to 110 μm). Based on the adsorption kinetics and adsorption mechanism analysis, it was found that the adsorption of Cr (VI) occurred mainly through the formation of coordination bonds with the amino groups on the molecular chains of chitosan. Meanwhile, RhB adsorption occurred through the formation of hydrogen bonds with the surface of coal gasification slag. Additionally, coal gasification slag can improve the mechanical properties of the chitosan membrane by 2.2 times, which may facilitate the practical application of the composite membrane. This study provides new insight into the adsorbent design and the resource utilization of coal gasification slag.
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Affiliation(s)
- Deqiang Peng
- College of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
| | - Shuyun Zhang
- College of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
| | - Kai Wang
- Shaanxi Institute of Geology and Mineral Resources Experiment Co., Ltd., Xi’an 710054, China
| | - Tingting Dong
- College of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
| | - Min Zhang
- College of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
| | - Guohui Dong
- College of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
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11
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Truong TT, Le TH, Pham TD. Adsorption characteristics of Copper (II) ion on Cu-doped ZnO nanomaterials based on green synthesis from Piper Chaudocanm L. leaves extract. Colloid Polym Sci 2022. [DOI: 10.1007/s00396-022-05028-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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12
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Yusuf TL, Orimolade BO, Masekela D, Mamba B, Mabuba N. The application of photoelectrocatalysis in the degradation of rhodamine B in aqueous solutions: a review. RSC Adv 2022; 12:26176-26191. [PMID: 36275103 PMCID: PMC9490539 DOI: 10.1039/d2ra04236c] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 09/07/2022] [Indexed: 12/14/2022] Open
Abstract
The pollution of the water environment by industrial effluents is an ongoing challenge due to the rate of industrialisation and globalisation. Photoelectrocatalysis (PEC), an electrochemical advanced oxidation process, has proven to be an effective method for removing organics from wastewater. Photoelectrocatalysis is environmentally benign, cost-effective and easy to operate. In this present review, we examine the recent progress in the removal of rhodamine B dye, a common constituent of textile effluent released into the environment, through photoelectrocatalytic degradation. We present a detailed discussion on the use of different kinds of unmodified and modified photoanodes that have been explored for the photoelectrocatalytic removal of this dye. More importantly, discussions are presented on the mechanisms and kinetics of the degradation of rhodamine B dye using these photoanodes. Hence, this review will be beneficial for researchers in developing future projects in the area of wastewater treatments through photoelectrocatalysis.
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Affiliation(s)
- Tunde Lewis Yusuf
- Department of Chemical Sciences, University of Johannesburg Doornfontein, P.O. BOX 17011 2028 Johannesburg South Africa
| | - Benjamin O Orimolade
- Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering and Technology, University of South Africa Private Bag X6, Florida Science Campus 1709 Johannesburg South Africa
| | - Daniel Masekela
- Department of Chemical Sciences, University of Johannesburg Doornfontein, P.O. BOX 17011 2028 Johannesburg South Africa
| | - Bhekie Mamba
- Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering and Technology, University of South Africa Private Bag X6, Florida Science Campus 1709 Johannesburg South Africa
| | - Nonhlangabezo Mabuba
- Department of Chemical Sciences, University of Johannesburg Doornfontein, P.O. BOX 17011 2028 Johannesburg South Africa
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Acacia nilotica Pods’ Extract Assisted-Hydrothermal Synthesis and Characterization of ZnO-CuO Nanocomposites. MATERIALS 2022; 15:ma15062291. [PMID: 35329744 PMCID: PMC8951223 DOI: 10.3390/ma15062291] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 03/16/2022] [Accepted: 03/18/2022] [Indexed: 01/27/2023]
Abstract
This work represents a novel combination between Acacia nilotica pods’ extract and the hydrothermal method to prepare nanoparticles of pure zinc oxide and pure copper oxide and nanocomposites of both oxides in different ratios. Five samples were prepared with different ratios of zinc oxide and copper oxide; 100% ZnO (ZC0), 75% ZnO: 25% CuO (ZC25), 50% ZnO: 50% CuO (ZC50), 25% ZnO: 75% CuO (ZC75), and 100% CuO (ZC100). Several techniques have been applied to characterize the prepared powders as FTIR, XRD, SEM, and TEM. The XRD results confirm the formation of the hexagonal wurtzite phase of zinc oxide and the monoclinic tenorite phase of copper oxide. The microscopy results show the formation of a heterostructure of nanocomposites with an average particle size of 13–27 nm.
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Optimization of Facile Synthesized ZnO/CuO Nanophotocatalyst for Organic Dye Degradation by Visible Light Irradiation Using Response Surface Methodology. Catalysts 2021. [DOI: 10.3390/catal11121509] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In this study, we aimed to observe how different operating parameters influenced the photocatalytic degradation of rhodamine B (RhB, cationic dye) and bromophenol Blue (BPB, anionic dye) over ZnO/CuO under visible light irradiation. This further corroborated the optimization study employing the response surface methodology (RSM) based on central composite design (CCD). The synthesis of the ZnO/CuO nanocomposite was carried out using the co-precipitation method. The synthesized samples were characterized via the XRD, FT-IR, FE-SEM, Raman, and BET techniques. The characterization revealed that the nanostructured ZnO/CuO formulation showed the highest surface area (83.13 m2·g−1). Its surface area was much higher than that of pure ZnO and CuO, thereby inheriting the highest photocatalytic activity. To substantiate this photocatalytic action, the investigative analysis was carried out at room temperature, associating first-order kinetics at a rate constant of 0.0464 min−1 for BPB and 0.07091 min−1 for RhB. We examined and assessed the binary interactions of the catalyst dosage, concentration of dye, and irradiation time. The suggested equation, with a high regression R2 value of 0.99701 for BPB and 0.9977 for RhB, accurately matched the experimental results. Through ANOVA we found that the most relevant individual parameter was the irradiation time, followed by catalyst dose and dye concentration. In a validation experiment, RSM based on CCD was found to be suitable for the optimization of the photocatalytic degradation of BPB and RhB over ZnO/CuO photocatalysts, with 98% degradation efficiency.
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