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Wang J, Du X, Wang Z, Wu P, Zhou J, Tao X, Dang Z, Lu G. Optimization and verification of selective removal of organophosphate esters from wastewater by molecularly imprinted adsorbent. CHEMOSPHERE 2024; 350:141082. [PMID: 38169198 DOI: 10.1016/j.chemosphere.2023.141082] [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: 09/25/2023] [Revised: 12/22/2023] [Accepted: 12/28/2023] [Indexed: 01/05/2024]
Abstract
Tributyl phosphate (TNBP), a new type of flame retardant, is an emerging pollutant and has been frequently detected in various matrices such as wastewater. Efficient removal of TNBP is critical for wastewater treatment. In this study, molecularly imprinted polymer (MIP) was prepared using precipitation polymerization for selective adsorption of TNBP. The results showed that MIP had a porous structure and formed effective imprinting cavities, which was primarily responsible for its superior adsorption ability. The adsorption of TNBP by MIP was carried out following both the pseudo-secondary kinetic model and the Langmuir isothermal adsorption model. MIP adsorbed TNBP rapidly and reached adsorption equilibrium within 30 min with 923 μmol g-1 at 298 K. The adsorption capacity and adsorption rate of MIP were respectively 2 and 5.49 times those of non-molecularly imprinted polymers. In addition, MIP could effectively counter disturbances from external parameters like temperature and pH, exhibiting strong environmental flexibility. MIP can specifically adsorb organophosphate esters, and can selectively adsorb TNBP under the interference of coexisting contaminants such as1,3-diphenylguanidine and isazofos. In actual bodies of water, MIP's highly selective adsorption of TNBP retains its advantage. The selective adsorption of MIP was mainly due to the common phosphate skeleton, and the specific substituent of organophosphate esters played an important role in the imprinting process. Hydrogen bonding might be involved in the polymerization process of TNBP with acrylamide and the adsorption process of TNBP by MIP.MIP exhibited good reuse efficiency, the total adsorption capacity decreased by no more than 25% after 7 reuse cycles. This study provides a simple and efficient method for selective removal of organophosphate from wastewater.
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Affiliation(s)
- Juan Wang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Xiaodong Du
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
| | - Zuifei Wang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Peiwen Wu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Jiangmin Zhou
- College of Life and Environmental Sciences, Wenzhou University, Wenzhou, 325035, China
| | - Xueqin Tao
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, 510006, China
| | - Guining Lu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, China.
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Wang S, Yu G, Wang J. Treatment of tributyl phosphate by fenton oxidation: Optimization of parameter, degradation kinetics and pathway. CHEMOSPHERE 2023; 317:137889. [PMID: 36657574 DOI: 10.1016/j.chemosphere.2023.137889] [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: 10/25/2022] [Revised: 01/14/2023] [Accepted: 01/15/2023] [Indexed: 06/17/2023]
Abstract
In nuclear industry, tributyl phosphate (TBP) is used as organic extracting solvent to separate uranium and plutonium. The spent TBP is finally discarded as the radioactive organic waste, which should be treated due to its potential risk. In this study, TBP degradation by Fenton oxidation was investigated in detail, including the optimization of operational conditions, degradation kinetics and degradation products. The optimal conditions for TBP degradation (per 10 ml) by Fenton oxidation was: 95 °C, pH 2, 150 ml 30% H2O2, and 105 ml 0.2 M Fe(II). H2O2 was continuously added with the flow rate of 0.5 ml/min, Fe(II) was intermittently added with the flow rate of 3 ml/10 min. The oil phase volume decreased with time and completely disappeared at the third hour. In contrast, the COD in water phase increased firstly and then decreased. At the end of the experiments, the COD achieved 23.8 g/L. The detection of phosphorus in water phase further confirmed the decomposition of TBP. Mono-butyl phosphate and di-butyl phosphate were identified as the intermediate products of TBP degradation. In addition, other four degradation products with the same m/z of 154 were identified, which may be derived from the hydroxylation of mono-butyl phosphate and di-butyl phosphate. Based on the degradation products, the degradation pathway of TBP was proposed. This study could provide an insight into the TBP degradation by Fenton oxidation, and an potential strategy for treating the spent radioactive organic solvent.
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Affiliation(s)
- Shizong Wang
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, China; Energy Science Building, INET, Tsinghua University, Beijing, 100084, China.
| | - Guoce Yu
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, China; Energy Science Building, INET, Tsinghua University, Beijing, 100084, China.
| | - Jianlong Wang
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, China; Beijing Key Laboratory of Radioactive Wastes Treatment, Tsinghua University, Beijing, 100084, China.
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Xue Y, Wang YL, Zheng YH, Yang YS, Xu WD, Yan YD, Zhao R, Zhang QG, Liu X, Ma FQ, Zhang ML. Effects of oxygen content on gaseous and solid products during molten salt oxidation of cation exchange resins. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:16729-16740. [PMID: 36525196 DOI: 10.1007/s11356-022-24762-3] [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: 10/04/2022] [Accepted: 12/10/2022] [Indexed: 06/17/2023]
Abstract
Molten salt oxidation (MSO) is an advanced method for waste resins treatment; nevertheless, the research about gas product variations of resins under different stoichiometric air feed coefficient (α) is rare. The optimal working condition of hazardous waste disposal is obtained through thermodynamic equilibrium calculation, and the method to improve the treatment efficiency is found to guide the optimization of the actual experiment. In this paper, Fact Sage was used to calculate the oxidation products of cation exchange resins (CERs) at different temperatures and α, focusing on the similarities and differences through the contents of CO, CH4, CO2, and SO2 during the oxidation of CERs, the MSO of CERs, and the theoretical calculation. The results indicated that the gas products of the calculation and reality of the oxidation process of CERs are quite different, while the CO contents of CERs during MSO are close to the calculated values. The main reason for this consequence is that in the oxidation process of CERs, the S in the sulfonic acid group will form thermally stable C-S with the styrene-divinylbenzene skeleton. Moreover, the introduction of carbonate can promote the destruction of C-S and absorb SO2 as sulfate, weakening the influence of C-S on the oxidation products of CERs. The gas chromatograph results indicated that the SO2 content is reduced from 0.66% in the process of CERs oxidation to 0.28% in MSO of CERs. When 1.25 times stoichiometric air feed coefficient is fed, the sulfate content in the carbonate is the highest at 900 °C, which is 23.4%.
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Affiliation(s)
- Yun Xue
- Yantai Research Institute & Graduate School, Harbin Engineering University, Yantai, 264006, Shandong, China
| | - Yue-Lin Wang
- Yantai Research Institute & Graduate School, Harbin Engineering University, Yantai, 264006, Shandong, China
| | - Yang-Hai Zheng
- Yantai Research Institute & Graduate School, Harbin Engineering University, Yantai, 264006, Shandong, China
| | - Yu-Sheng Yang
- Inner Mongolia University of Science & Technology, Baotou, 014017, Inner Mongolia, China
| | - Wen-Da Xu
- Yantai Standard Metrology Inspection & Test Center, National Steam Flowrate Measurement Station, Yantai, 264006, Shandong, China
| | - Yong-De Yan
- Yantai Research Institute & Graduate School, Harbin Engineering University, Yantai, 264006, Shandong, China.
| | - Ran Zhao
- Inner Mongolia University of Science & Technology, Baotou, 014017, Inner Mongolia, China
| | - Qing-Guo Zhang
- Yantai Research Institute & Graduate School, Harbin Engineering University, Yantai, 264006, Shandong, China
| | - Xin Liu
- Yantai Research Institute & Graduate School, Harbin Engineering University, Yantai, 264006, Shandong, China
| | - Fu-Qiu Ma
- Yantai Research Institute & Graduate School, Harbin Engineering University, Yantai, 264006, Shandong, China
| | - Mi-Lin Zhang
- Yantai Research Institute & Graduate School, Harbin Engineering University, Yantai, 264006, Shandong, China
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P VA, Mishra S, Rajeev R, Desigan N, Venkatesan K, Ananthasivan K. Hydrolysis of tri-butyl phosphate in n-dodecane using sodium hydroxide: Factors affecting the hydrolysis process. PROGRESS IN NUCLEAR ENERGY 2022. [DOI: 10.1016/j.pnucene.2022.104247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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The effect of EDTA on the desorption of uranium from calcium silicate hydrate matrices. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-08089-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Li J, Chen L, Wang J. Solidification of radioactive wastes by cement-based materials. PROGRESS IN NUCLEAR ENERGY 2021. [DOI: 10.1016/j.pnucene.2021.103957] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Experimental investigation of uranium extraction from the industrial nuclear waste treatment plant by tri-butyl-phosphate. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07607-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Fenton oxidative degradation of spent organic solvents from nuclear fuel reprocessing plant. PROGRESS IN NUCLEAR ENERGY 2020. [DOI: 10.1016/j.pnucene.2020.103563] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Cuccia V, Freire CB, Ladeira ACQ. Radwaste oil immobilization in geopolymer after non-destructive treatment. PROGRESS IN NUCLEAR ENERGY 2020. [DOI: 10.1016/j.pnucene.2020.103246] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tang H, Li Y, Huang W, Chen S, Luo F, Shu X, Tan H, Li B, Xie Y, Shao D, Lu X. Chemical behavior of uranium contaminated soil solidified by microwave sintering. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06835-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yin M, Sun J, Chen Y, Wang J, Shang J, Belshaw N, Shen C, Liu J, Li H, Linghu W, Xiao T, Dong X, Song G, Xiao E, Chen D. Mechanism of uranium release from uranium mill tailings under long-term exposure to simulated acid rain: Geochemical evidence and environmental implication. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 244:174-181. [PMID: 30336376 DOI: 10.1016/j.envpol.2018.10.018] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 09/24/2018] [Accepted: 10/03/2018] [Indexed: 06/08/2023]
Abstract
To date, there is not sufficient knowledge to fully understand the occurrence, transport and fate of residual uranium (U) from uranium mill tailings (UMT). Herein this study investigated different U release behaviors from natural UMT (without grinding) under four simulated acid rain (pH = 2.0-5.0) compared with controlled scenario (pH = 6.0) for 25 weeks. The results showed that the most notable U release was observed from UMTpH2.0, followed by UMTpH3.0 whereas a nonlinear relationship between pH and U release was observed from UMTpH4.0-6.0. The divergence of U release behaviors was attributed to the presence of minerals such as calcite and clinochlore. Autunite, a secondary mineral formed after leaching, might regulate U release in UMTpH3.0-6.0. Fick theory model revealed the shift of U release mechanism from surface dissolution to diffusion transport for UMTpH2.0, UMTpH3.0 and UMTpH5.0 at varied stage, whereas UMTpH4.0 and UMTpH6.0 displayed univocal dissolution and diffusion mechanism, respectively. This study highlights the necessity of performing long-term leaching tests to detect the "shift event" of leaching kinetics and to better understand the mechanism of U release influenced by mineralogy of the natural UMT under simulated acid rain conditions, which is conducive to developing UMT management strategies to minimize the risk of U release and exposure.
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Affiliation(s)
- Meiling Yin
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Jing Sun
- School of Earth Sciences, University of Western Australia, Perth, WA, 6009, Australia
| | - Yongheng Chen
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Jin Wang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou, 510006, China; Department of Earth Sciences, University of Oxford, Oxford, OX1 3AN, UK.
| | - Jianying Shang
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Nick Belshaw
- Department of Earth Sciences, University of Oxford, Oxford, OX1 3AN, UK
| | - ChuanChou Shen
- Department of Geosciences, National Taiwan University, Taipei, 10617, Taiwan; Research Center for Future Earth, National Taiwan University, Taipei, 10617, Taiwan
| | - Juan Liu
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China; Department of Earth Sciences, University of Oxford, Oxford, OX1 3AN, UK.
| | - Huosheng Li
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Wensheng Linghu
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
| | - Tangfu Xiao
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Xinjiao Dong
- School of Life & Environmental Science, Wenzhou University, Wenzhou, 325027, China
| | - Gang Song
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou, 510006, China
| | - Enzong Xiao
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Diyun Chen
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou, 510006, China
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Qin Q, Wang S, Peng H, Qiao Y, Zhang H, Wang K, Liu X, Qian Z, He L, Cai J, Li Y, Xia X. Solubility of radioactive inorganic salt in supercritical water. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-018-5939-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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