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Song W, Li J, Zhang X, Feng J, Du X, Wang Q, Fu C, Qiu W, Wang Z, Gao X. A feasible approach for azo-dye methyl orange degradation in siderite/H 2O 2 assisted by persulfate: Optimization using response surface methodology and pathway. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 308:114397. [PMID: 35121467 DOI: 10.1016/j.jenvman.2021.114397] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 11/28/2021] [Accepted: 12/26/2021] [Indexed: 06/14/2023]
Abstract
Siderite was applied to the binary oxidant system of siderite-catalyzed hydrogen peroxide (H2O2) and enhanced with persulfate (PS). In the absence of PS, methyl orange (MO) almost could not be degraded by the siderite/H2O2 process. However, adding PS significantly improved the capacity of MO to oxidize azo-dye. The influence of individual and interaction of reaction factors have been explored with a simple response surface methodology (RSM) based on central composite design (CCD). The quadratic model with low probabilities (<0.0001) at a confidence level of 95% was satisfactory to predict MO degradation in siderite/H2O2/PS system, whose correlation coefficients of R2 and R2-adj were 0.9569 and 0.9264, respectively. Moreover, the optimum operation conditions of 21.20 mM, 2.75 g/L, 3.86 mM, and 4.69 for H2O2, siderite, PS and initial pH, respectively with the response of C/C0 around 0.047. Radical scavenging experiments and electron spin resonance (ESR) determined that ·OH was crucial for MO degradation, while the contribution of SO4·- was minor. The surface morphology and iron content of siderite before and after the oxidation process showed clear differences. Possible intermediates and a degradation pathway were proposed based on the results of UV-Vis spectral and GC-MS analysis. Moreover, the toxicity to Vibrio fischeri bioluminescent bacterium has increased in the earlier degradation stage due to the generated by-products and weaken with the continuous treatment. This study demonstrated that the siderite/H2O2/PS system was effective over a relatively wide pH range without producing secondary pollutants, making it a promising technology and potential environmentally benign approach to azo-dye wastewater treatment.
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Affiliation(s)
- Wei Song
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Ji Li
- School of Civil and Environmental Engineering, Shenzhen Key Laboratory of Water Resource Application and Environmental Pollution Control, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Xiaolei Zhang
- School of Civil and Environmental Engineering, Shenzhen Key Laboratory of Water Resource Application and Environmental Pollution Control, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Jianpei Feng
- School of Civil and Environmental Engineering, Shenzhen Key Laboratory of Water Resource Application and Environmental Pollution Control, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Xing Du
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Qiao Wang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Caixia Fu
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China.
| | - Wenhui Qiu
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Zhihong Wang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China.
| | - Xinlei Gao
- School of Civil and Environmental Engineering, Shenzhen Key Laboratory of Water Resource Application and Environmental Pollution Control, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China; Guangdong Water Co., Ltd, Shenzhen, 518021, China
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Tzoumani I, Lainioti GC, Aletras AJ, Zainescu G, Stefan S, Meghea A, Kallitsis JK. Modification of Collagen Derivatives with Water-Soluble Polymers for the Development of Cross-Linked Hydrogels for Controlled Release. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E4067. [PMID: 31817565 PMCID: PMC6947037 DOI: 10.3390/ma12244067] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 11/22/2019] [Accepted: 11/27/2019] [Indexed: 12/22/2022]
Abstract
Novel cross-linked hydrogels were synthesized as potential materials for the development of smart biofertilizers. For this purpose, hydrogels were prepared using collagen hydrolysate recovered from tannery waste. The water-soluble polymer poly(sodium 4-styrenesulfonate-co-glycidyl methacrylate) (P(SSNa-co-GMAx)) was among others used for the cross-linking reaction that combined hydrophilic nature with epoxide groups. The synthetic procedure was thoroughly investigated in order to ensure high percentage of epoxide groups in combination with water-soluble behavior. The copolymer did not show cytotoxicity against normal lung, skin fibroblasts, or nasal polyps fibroblasts. Through the present work, we also present the ability to control the properties of cross-linked hydrogels by altering copolymer's composition and cross-linking parameters (curing temperature and time). Hydrogels were then studied in terms of water-uptake capacity for a period up to six days. The techniques Proton Nuclear Magnetic Resonance (1H NMR), Thermogravimetric Analysis (TGA), Size Exclusion Chromatography (SEC), and Attenuated Total Reflection Fourier Transform Infrared Spectroscopy (ATR-FTIR) were applied for the characterization of the synthesized copolymers and the cross-linked hydrogels. Three samples of biofertilizers based on collagen hydrolysate functionalized with P(SSNa-co-GMAx) and starch and having nutrients encapsulated (N, P, K) were prepared and characterized by physical-chemical analysis and Energy Dispersive X-ray analysis-Scanning Electron Microscope (EDAX-SEM) in terms of microstructure. Preliminary tests for application as fertilizers were performed including the release degree of oxidable organic compounds.
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Affiliation(s)
- Ioanna Tzoumani
- Department of Chemistry, University of Patras, GR-265 04 Patras, Greece; (I.T.); (G.C.L.); (A.J.A.)
- Foundation for Research and Technology-Hellas (FORTH)/Institute of Chemical Engineering Sciences (ICE-HT), Stadiou Str., Platani, P.O. Box 1414, GR-265 04 Rio-Patras, Greece
| | - Georgia Ch. Lainioti
- Department of Chemistry, University of Patras, GR-265 04 Patras, Greece; (I.T.); (G.C.L.); (A.J.A.)
| | - Alexios J. Aletras
- Department of Chemistry, University of Patras, GR-265 04 Patras, Greece; (I.T.); (G.C.L.); (A.J.A.)
| | - Gabriel Zainescu
- National R & D Institute for Textile and Leather-Division: Leather and Footwear Research Institute, 93 Ion Minulescu Str., 031215 Bucharest, Romania;
| | - Simina Stefan
- Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, 1-7 Polizu Str., 011061 Bucharest, Romania;
| | - Aurelia Meghea
- Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, 1-7 Polizu Str., 011061 Bucharest, Romania;
| | - Joannis K. Kallitsis
- Department of Chemistry, University of Patras, GR-265 04 Patras, Greece; (I.T.); (G.C.L.); (A.J.A.)
- Foundation for Research and Technology-Hellas (FORTH)/Institute of Chemical Engineering Sciences (ICE-HT), Stadiou Str., Platani, P.O. Box 1414, GR-265 04 Rio-Patras, Greece
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Di X, Guo F, Zhu Z, Xu Z, Qian Z, Zhang Q. In situ synthesis of ZnO–GO/CGH composites for visible light photocatalytic degradation of methylene blue. RSC Adv 2019; 9:41209-41217. [PMID: 35540050 PMCID: PMC9076400 DOI: 10.1039/c9ra09260a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 12/09/2019] [Indexed: 11/21/2022] Open
Abstract
A novel ZnO–GO/CGH composite was prepared using an in situ synthesis process for photodegradation of methylene blue under visible light illumination. The chitin–graphene composite hydrogel (CGH) was used to provide uniform binding of the nano ZnO–GO composite to the hydrogel surface and prevent their agglomeration. GO provides multi-dimensional protons and electron transport channels for ZnO with a flower-like structure, which possessed improved photo-catalytic activity. SEM analysis indicates that the hydrogel has good adsorption properties with rougher surfaces and porous microstructure, which enables it to adsorb the dyes effectively. Under synergetic enhancement of adsorption and photo-catalysis, catalytic activity and nano ZnO–GO/CGH recycling improved greatly. Synthesized nano ZnO–GO/CGH showed high dye removal efficiency of 99%, about 2.2 times that of the pure chitin gel under the same condition. This suggests the potential application of the new photocatalytic composites to remove organic dyes from wastewater. A novel ZnO–GO/CGH composite was prepared using an in situ synthesis process for photodegradation of methylene blue under visible light illumination.![]()
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Affiliation(s)
- Xiaoxuan Di
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education)
- School of Ocean Science and Technology
- Dalian University of Technology
- Panjin 124221
- China
| | - Feng Guo
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education)
- School of Ocean Science and Technology
- Dalian University of Technology
- Panjin 124221
- China
| | - Zihan Zhu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education)
- School of Ocean Science and Technology
- Dalian University of Technology
- Panjin 124221
- China
| | - Zhonghao Xu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education)
- School of Ocean Science and Technology
- Dalian University of Technology
- Panjin 124221
- China
| | - Ziqi Qian
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education)
- School of Ocean Science and Technology
- Dalian University of Technology
- Panjin 124221
- China
| | - Qian Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education)
- School of Ocean Science and Technology
- Dalian University of Technology
- Panjin 124221
- China
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