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Deng M, Zhao L, Wang Z, Yang P, Sun Y. Preparation of phosphoric-modified aloe vera/chitosan aerogels and their efficient adsorption of U(VI). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:33229-33242. [PMID: 36478555 DOI: 10.1007/s11356-022-24527-y] [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: 09/13/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
The efficient adsorption of radioactive elements from nuclear wastewater is an important research topic in the environmental field. The unique three-dimensional porous structure of aerogels has great potential in the field of adsorption. Phosphoric-modified aloe vera/chitosan aerogel (CS/AL-AP) was prepared from chitosan, phosphoric acid, and aloe powder by vacuum freeze-drying self-assembly. The maximum adsorption of uranyl ions by CS/AL-AP was found to be 322.34 mg/g at pH 6, adsorption time of 120 min, solid-to-liquid ratio of 0.125 g/L, reaction temperature of 303 K, and initial uranyl ion concentration of 50 mg/L. The adsorption process is consistent with the Langmuir isotherm model and the quasi-secondary kinetic model, indicating that the adsorption process is monolayer adsorption. The type of adsorption is mainly chemisorption. FTIR and XPS analyses indicate that the adsorption of U(VI) by CS/AL-AP results from the combined action of coordination or chelation of amino, hydroxyl, and carboxyl groups. In addition, CS/AL-AP shows excellent adsorption capacity in the presence of complex co-existing ions. After five adsorption-desorption experiments, the adsorption capacity of CS/AL-AP for uranyl ions remained at a high level. It indicates that CS/AL-AP has good stability and recoverability. The results indicate that CS/AL-AP has excellent potential in the field of uranium removal.
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Affiliation(s)
- Mingzhan Deng
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China
- Joint Training Base for Postgraduate Students of University of South China-230 Institute of Nuclear Industry, University of South China, Hengyang, 421001, China
| | - Limei Zhao
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China
- Joint Training Base for Postgraduate Students of University of South China-230 Institute of Nuclear Industry, University of South China, Hengyang, 421001, China
| | - Zhongchao Wang
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China
- Joint Training Base for Postgraduate Students of University of South China-230 Institute of Nuclear Industry, University of South China, Hengyang, 421001, China
| | - Pengfei Yang
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China.
- Joint Training Base for Postgraduate Students of University of South China-230 Institute of Nuclear Industry, University of South China, Hengyang, 421001, China.
| | - Yunkai Sun
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China
- School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou, 213022, China
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Sun W, Lv H, Ma L, Tan X, Jin C, Wu H, Chen L, Liu M, Wei H, Sun C. Use of catalytic wet air oxidation (CWAO) for pretreatment of high-salinity high-organic wastewater. J Environ Sci (China) 2022; 120:105-114. [PMID: 35623764 DOI: 10.1016/j.jes.2021.06.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/22/2021] [Accepted: 06/24/2021] [Indexed: 06/15/2023]
Abstract
Catalytic wet air oxidation (CWAO) coupled desalination technology provides a possibility for the effective and economic degradation of high salinity and high organic wastewater. Chloride widely occurs in natural and wastewaters, and its high content jeopardizes the efficacy of Advanced oxidation process (AOPs). Thus, a novel chlorine ion resistant catalyst B-site Ru doped LaFe1-xRuxO3-δ in CWAO treatment of chlorine ion wastewater was examined. Especially, LaFe0.85Ru0.15O3-δ was 45.5% better than that of the 6%RuO2@TiO2 (commercial carrier) on total organic carbon (TOC) removal. Also, doped catalysts LaFe1-xRuxO3-δ showed better activity than supported catalysts RuO2@LaFeO3 and RuO2@TiO2 with the same Ru content. Moreover, LaFe0.85Ru0.15O3-δ has novel chlorine ion resistance no matter the concentration of Cl- and no Ru dissolves after the reaction. X-ray diffraction (XRD) refinement, X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), and X-ray absorption fine structure (XAFS) measurements verified the structure of LaFe0.85Ru0.15O3-δ. Kinetic data and density functional theory (DFT) proved that Fe is the site of acetic acid oxidation and adsorption of chloride ions. The existence of Fe in LaFe0.85Ru0.15O3-δ could adsorb chlorine ion (catalytic activity inhibitor), which can protect the Ru site and other active oxygen species to exert catalytic activity. This work is essential for the development of chloride-resistant catalyst in CWAO.
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Affiliation(s)
- Wenjing Sun
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Hongxia Lv
- Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, College of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
| | - Lei Ma
- Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, College of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
| | - Xiangdong Tan
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Chengyu Jin
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Huiling Wu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lili Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mengyang Liu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huangzhao Wei
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Chenglin Sun
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
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Deng M, Ai Y, Zhao L, Yang P. Synthesis of zeolite X from waste basalt powder and its efficient adsorption of uranyl ions in solution. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08458-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Ouyang Y, Xu Y, Zhao L, Deng M, Yang P, Peng G, Ke G. Preparation of ZnNiAl-LDHs microspheres and their adsorption behavior and mechanism on U(VI). Sci Rep 2021; 11:21625. [PMID: 34732804 PMCID: PMC8566569 DOI: 10.1038/s41598-021-01133-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 10/22/2021] [Indexed: 11/09/2022] Open
Abstract
Ternary zinc-nickel-aluminum hydrotalcites (ZnNiAl-LDHs) were prepared by hydrothermal synthesis. The structure and morphology of the materials were characterized using X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), nitrogen adsorption-desorption (BET) and other test techniques. ZnNiAl-LDHs was applied in the treatment of uranium-containing wastewater, the effects of initial pH of the solution, adsorption temperature and contact time on its adsorption performance were systematically investigated, and the adsorption performance of ZnNiAl-LDHs and ZnAl-LDHs on uranyl ions were compared. The result showed that ZnNiAl-LDHs were 3D microspheres self-assembled from flakes, with a specific surface area of 102.02 m2/g, which was much larger than that of flake ZnAl-LDHs (18.49 m2/g), and the saturation adsorption capacity of ZnNiAl-LDHs for uranyl ions (278.26 mg/g) was much higher than that of ZnAl-LDHs for uranyl ions (189.16 mg/g), so the ternary ZnNiAl-LDHs had a more excellent adsorption capacity. In addition, kinetic and thermodynamic studies showed that the adsorption process of ZnNiAl-LDHs on uranyl ions conformed to the pseudo-second-order kinetic model and Langmuir isotherm model. The positive value of ΔH and the negative value of ΔG indicated that the adsorption process was endothermic and spontaneous. The adsorption mechanism was analyzed by X-ray energy spectroscopy (EDS), fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The results showed that the adsorption of uranyl ions by ZnNiAl-LDHs mainly consisted of complexation and ion substitution. The research results prove that ZnNiAl-LDHs is an adsorbent with low cost and excellent performance, and it has a good application prospect in the field of uranium-containing wastewater treatment.
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Affiliation(s)
- Yanquan Ouyang
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China.,Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang, 421001, China
| | - Yuanxin Xu
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China.,Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang, 421001, China
| | - Limei Zhao
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China.,Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang, 421001, China
| | - Mingzhan Deng
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China.,Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang, 421001, China
| | - Pengfei Yang
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China. .,Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang, 421001, China. .,China Nuclear Construction Key Laboratory of High Performance Concrete, University of South China, Hengyang, 421001, China.
| | - Guowen Peng
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China.,Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang, 421001, China
| | - Guojun Ke
- China Nuclear Construction Key Laboratory of High Performance Concrete, University of South China, Hengyang, 421001, China.,Hunan Provincial Key Laboratory of High Performance Special Concrete, University of South China, Hengyang, 421001, China
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Kong X, Hao P, Duan H. Super‐stable mineralization effect of layered double hydroxides for heavy metals: Application in soil remediation and perspective. EXPLORATION 2021; 1:20210052. [PMCID: PMC10190976 DOI: 10.1002/exp.20210052] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 09/13/2021] [Indexed: 06/15/2023]
Affiliation(s)
- Xianggui Kong
- State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing China
| | - Peipei Hao
- State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing China
| | - Haohong Duan
- Department of Chemistry Tsinghua University Beijing China
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