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Wu H, Wang J, Du E, Guo H. Comparative analysis of UV-initiated ARPs for degradation of the emerging substitute of perfluorinated compounds: Does defluorination mean the sole factor? JOURNAL OF HAZARDOUS MATERIALS 2024; 474:134687. [PMID: 38805816 DOI: 10.1016/j.jhazmat.2024.134687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 04/25/2024] [Accepted: 05/20/2024] [Indexed: 05/30/2024]
Abstract
Due to the increasing attention for the residual of per- and polyfluorinated compounds in environmental water, Sodium p-Perfluorous Nonenoxybenzenesulfonate (OBS) have been considered as an alternative solution for perfluorooctane sulfonic acid (PFOS). However, recent detections of elevated OBS concentrations in oil fields and Frontal polymerization foams have raised environmental concerns leading to the decontamination exploration for this compound. In this study, three advanced reduction processes including UV-Sulfate (UV-SF), UV-Iodide (UV-KI) and UV-Nitrilotriacetic acid (UV-NTA) were selected to evaluate the removal for OBS. Results revealed that hydrated electrons (eaq-) dominated the degradation and defluorination of OBS. Remarkably, the UV-KI exhibited the highest removal rate (0.005 s-1) and defluorination efficiency (35 %) along with the highest concentration of eaq- (K = -4.651). Despite that nucleophilic attack from eaq- on sp2 carbon and H/F exchange were discovered as the general mechanism, high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (HPLC/Q-TOF-MS) analysis with density functional theory (DFT) calculations revealed the diversified products and routes. Intermediates with lowest fluorine content for UV-KI were identified, the presence nitrogen-containing intermediates were revealed in the UV-NTA. Notably, the nitrogen-containing intermediates displayed the enhanced toxicity, and the iodine poly-fluorinated intermediates could be a potential-threat compared to the superior defluorination performance for UV-KI.
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Affiliation(s)
- Han Wu
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Jingquan Wang
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Erdeng Du
- School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
| | - Hongguang Guo
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China.
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Wang Z, Jin X, Hong R, Wang X, Chen Z, Gao G, He H, Liu J, Gu C. New Indole Derivative Heterogeneous System for the Synergistic Reduction and Oxidation of Various Per-/Polyfluoroalkyl Substances: Insights into the Degradation/Defluorination Mechanism. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:21459-21469. [PMID: 38056012 DOI: 10.1021/acs.est.3c05940] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
The hydrated electron (eaq-) system is typically suitable for degrading perfluoroalkyl substances (PFASs). To enhance eaq- utilization, we synthesized a new indole compound (DIHA) that forms stable nanospheres (100-200 nm) in water via a supramolecular assembly. Herein, the DIHA nanoemulsion system exhibits high degradation efficiencies toward a broad category of PFASs, regardless of the headgroup, chain length, and branching structure, under UV (254 nm) irradiation. The strong adsorption of PFAS on the DIHA surface ensures its effective degradation/defluorination. Quenching experiments further demonstrated that the reaction took place on the surface of DIHA nanospheres. This specific heterogeneous surface reaction unveiled novel PFAS degradation and defluorination mechanisms that differ from previously reported eaq- systems. First, the photogenerated surface electrons nonselectively attacked multiple C-F bonds of the -CF2- chain. This plays a dominant degrading/defluorinating role in the DIHA system. Second, abundant hydroxyl radicals (•OH) were also produced, leading to synergistic reduction (by surface electron) and oxidation (by surface •OH) in a single system. This facilitates faster and deeper defluorination of different structured PFASs through multiple pathways. The new mechanism inspires the design of innovative organo-heterogeneous eaq- systems possessing synergistic reduction and oxidation functions, thereby making them potentially effective for treating PFAS-contaminated water.
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Affiliation(s)
- Zhe Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, P. R. China
| | - Xin Jin
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, P. R. China
- School of Environment, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Ran Hong
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Xinhao Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, P. R. China
| | - Zhanghao Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, P. R. China
| | - Guandao Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, P. R. China
| | - Huan He
- School of Environment, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Jinyong Liu
- Department of Chemical & Environmental Engineering and Materials Science & Engineering Program, University of California, Riverside, California 92521, United States
| | - Cheng Gu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, P. R. China
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Chen Q, Denisov SA, Dobrovolskii D, Mostafavi M. Observation of Nanoconfinement Effect on the Kinetics of Hydrated Electron in the Nanoscale Water Pools of Water-AOT-Cyclohexane Microemulsions by Picosecond Pulse Radiolysis. J Phys Chem B 2023; 127:7974-7982. [PMID: 37681575 DOI: 10.1021/acs.jpcb.3c04302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
The decay kinetics of the hydrated electron (eaq-) in aerosol OT (AOT)-based ternary microemulsions with pool sizes ranging from 0.34 to 4.85 nm were studied using picosecond pulse radiolysis coupled with transient absorption UV-vis spectroscopy. Electron transfer from oil to water and the subsequent solvation occurred within a time resolution of 7 ps. The decay kinetics of eaq- were accurately modeled using a double-exponential decay model, revealing the occurrence of two types of reactions, i.e., the recombination reaction at the water-oil interface and the radical-radical reactions in the water pools. The apparent lifetimes of both types of decays decreased significantly as the size of water pools decreased, indicating the influence of nanoconfinement effects. Moreover, the importance of the water-oil interface increased with decreasing water content, regardless of the presence or absence of NO3- as an electron scavenger in the water pools. Our findings provide a comprehensive understanding on the kinetics of the radiation reaction in AOT-based microemulsions.
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Affiliation(s)
- Qingde Chen
- Institut de Chimie Physique, UMR 8000 CNRS, Bât. 349, Université Paris-Saclay, 91405 Orsay, Cedex, France
- Beijing National Laboratory for Molecular Sciences, Fundamental Science on Radiochemistry and Radiation Chemistry Laboratory, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Sergey A Denisov
- Institut de Chimie Physique, UMR 8000 CNRS, Bât. 349, Université Paris-Saclay, 91405 Orsay, Cedex, France
| | - Denis Dobrovolskii
- Institut de Chimie Physique, UMR 8000 CNRS, Bât. 349, Université Paris-Saclay, 91405 Orsay, Cedex, France
| | - Mehran Mostafavi
- Institut de Chimie Physique, UMR 8000 CNRS, Bât. 349, Université Paris-Saclay, 91405 Orsay, Cedex, France
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Bahry T, Denisov SA, Moisy P, Ma J, Mostafavi M. Real-Time Observation of Solvation Dynamics of Electron in Actinide Extraction Binary Solutions of Water and n-Tributyl Phosphate. J Phys Chem B 2021; 125:3843-3849. [PMID: 33650867 DOI: 10.1021/acs.jpcb.0c10831] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The excess electron in solution is a highly reactive radical involved in various radiation-induced reactions. Its solvation state critically determines the subsequent pathway and rate of transfer. For instance, water plays a dominating role in the electron-induced dealkylation of n-tributyl phosphate in actinide extraction processing. However, the underlying electron solvation processes in such systems are lacking. Herein, we directly observed the solvation dynamics of electrons in H-bonded water and n-tributyl phosphate (TBP) binary solutions with a mole fraction of water (Xw) varying from 0.05 to 0.51 under ambient conditions. Following the evolution of the absorption spectrum of trapped electrons (not fully solvated) with picosecond resolution, we show that electrons statistically distributed would undergo preferential solvation within water molecules extracted in TBP. We determine the time scale of excess electron full solvation from the deconvoluted transient absorption-kinetical data. The process of solvent reorganization accelerates by increasing the water molar fraction, and the rate of this process is 2 orders of magnitude slower compared to bulk water. We assigned the solvation process to hydrogen network reorientation induced by a negative charge of the excess electron that strongly depends on the local water environment. Our findings suggest that water significantly stabilizes the electron in a deeper potential than the pure TBP case. In its new state, the electron is likely to inhibit the dealkylation of extractants in actinide separation.
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Affiliation(s)
- Teseer Bahry
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, P. R. China.,Institut de Chimie Physique, UMR 8000 CNRS, Bât. 349, Université Paris-Saclay 91405, Orsay, Cedex France
| | - Sergey A Denisov
- Institut de Chimie Physique, UMR 8000 CNRS, Bât. 349, Université Paris-Saclay 91405, Orsay, Cedex France
| | - Philippe Moisy
- CEA, DES/ISEC/DMRC, Univ. Montpellier, 34090 Marcoule, France
| | - Jun Ma
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, P. R. China
| | - Mehran Mostafavi
- Institut de Chimie Physique, UMR 8000 CNRS, Bât. 349, Université Paris-Saclay 91405, Orsay, Cedex France
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Gebicki JL, Gebicka L. Radical reactions in reverse micelles studied by pulse radiolysis. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.109105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Gębicki J, Szymańska-Owczarek M, Pacholczyk-Sienicka B, Jankowski S. Ascorbyl radical disproportionation in reverse micellar systems. Radiat Phys Chem Oxf Engl 1993 2018. [DOI: 10.1016/j.radphyschem.2017.10.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Lianos P, Malliaris A. Fractal Nature of Fluorescence Quenching and its Relation to Percolative Conduction in Water-in-Oil Microemulsions. Isr J Chem 2013. [DOI: 10.1002/ijch.199100019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Banerjee C, Ghatak C, Mandal S, Ghosh S, Kuchlyan J, Sarkar N. Curcumin in reverse micelle: an example to control excited-state intramolecular proton transfer (ESIPT) in confined media. J Phys Chem B 2013; 117:6906-16. [PMID: 23687942 DOI: 10.1021/jp401840z] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In this Article, we focused on the modulation of the photophysical properties of curcumin, an anti-cancer drug, in aqueous and nonaqueous reverse micelles of AOT in n-heptane using steady-state and time-resolved fluorescence spectroscopy. The instability of curcumin is a common problem which restricts its numerous applications like Alzheimer disease, HIV infections, cystic fibrosis, etc. Our study reveals that curcumin shows comparatively higher stability after encapsulation into the interfacial region of the reverse micelle. To get a vivid description of the microenvironment, we added hydrogen-bond-donor (HBD) as well as non-hydrogen-bond-donor (NBD) core solvents. For experimental purposes, we used water, ethylene glycol (EG), glycerol (GY) as HBD solvents and N,N-dimethyl formamide (DMF) as a NBD solvent. With increasing amount of core solvents, irrespective of HBD or NBD, the fluorescence intensity and lifetime of curcumin increase with remarkable red-shift inside the reverse micelle. This is attributed to the modulation of the nonradiative rates associated with the excited-state intermolecular hydrogen bonding between the pigment and the polar solvents. We obtained a high partition constant at W0 = 0 (W0 = [core solvent]/[AOT]) which is certainly due to the hydrogen bonding between the negatively charged sulfonate group of AOT and hydroxyl groups of curcumin. Steady-state anisotropy and time-resolved results give an idea about the microenvironment sensed by the curcumin molecules. The red-shift of emission spectra, increase in the value of ET(30), as well as the increase in the fluorescence lifetime were interpreted as being caused by the partition of the probe between the micellar interface and the polar core solvent. Indeed, we show here that it is possible to control the excited state intramolecular proton transfer (ESIPT) process of curcumin by simply changing the properties of the AOT reverse micelle interfaces by choosing the appropriate polar solvents to make the reverse micelle media.
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Affiliation(s)
- Chiranjib Banerjee
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
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Setua P, Ghatak C, Rao VG, Das SK, Sarkar N. Dynamics of Solvation and Rotational Relaxation of Coumarin 480 in Pure Aqueous-AOT Reverse Micelle and Reverse Micelle Containing Different-Sized Silver Nanoparticles Inside Its Core: A Comparative Study. J Phys Chem B 2012; 116:3704-12. [PMID: 22380919 DOI: 10.1021/jp203043k] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Palash Setua
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, West
Bengal, India
| | - Chiranjib Ghatak
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, West
Bengal, India
| | - Vishal Govind Rao
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, West
Bengal, India
| | - S. K. Das
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar,
Kolkata 700064, West Bengal, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, West
Bengal, India
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10
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Guleria A, Singh AK, Sarkar SK, Mukherjee T, Adhikari S. Generation of Counter Ion Radical (Br2•–) and Its Reactions in Water-in-Oil (CTAB or CPB)/n-Butanol/Cyclohexane/Water) Microemulsion. J Phys Chem B 2011; 115:10615-21. [DOI: 10.1021/jp204217k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Apurav Guleria
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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11
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Aoudia M, Rodgers MAJ. Photoprocesses in AOT Reverse Micelles Containing Metalloporphyrins and Oligopeptides. J Phys Chem B 2003. [DOI: 10.1021/jp027106w] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Aoudia
- Department of Chemistry, College of Science, Sultan Qaboos University, P.O. Box 36, Al-Khod, Sultanate of Oman, and Center for Photochemical Science, Department of Chemistry, Bowling Green State University, Bowling Green, Ohio 43403
| | - M. A. J. Rodgers
- Department of Chemistry, College of Science, Sultan Qaboos University, P.O. Box 36, Al-Khod, Sultanate of Oman, and Center for Photochemical Science, Department of Chemistry, Bowling Green State University, Bowling Green, Ohio 43403
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12
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Laria D, Kapral R. Electron solvation in aqueous reverse micelles: Equilibrium properties. J Chem Phys 2002. [DOI: 10.1063/1.1509449] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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Pileni MP. Fabrication and Properties of Nanosized Material Made by Using Colloidal Assemblies as Templates. CRYSTAL RESEARCH AND TECHNOLOGY 1998. [DOI: 10.1002/(sici)1521-4079(199810)33:7/8<1155::aid-crat1155>3.0.co;2-a] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Adhikari S, Joshi R, Gopinathan C. Reaction kinetics of hydrated electrons in a quaternary micro emulsion system: A pulse radiolysis study. INT J CHEM KINET 1998. [DOI: 10.1002/(sici)1097-4601(1998)30:10<699::aid-kin1>3.0.co;2-q] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Gebicki JL, Gebicka L. Intermicellar Material Exchange and Droplet Clustering in AOT Reverse Micellar Systems. A Pulse Radiolysis Study of (SCN)2•- Radical Anion Spectra and Decay. J Phys Chem B 1997. [DOI: 10.1021/jp972273v] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jerzy L. Gebicki
- Institute of Applied Radiation Chemistry, Technical University of Łódź, ul.Wróblewskiego 15, 93-590 Łódź, Poland
| | - Lidia Gebicka
- Institute of Applied Radiation Chemistry, Technical University of Łódź, ul.Wróblewskiego 15, 93-590 Łódź, Poland
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Shah C, Sellappan S, Madamwar D. Role of environment on the activity and stability of α-amylase incorporated in reverse micelles. Appl Biochem Biotechnol 1997. [DOI: 10.1007/bf02787994] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Luisi PL, Giomini M, Pileni MP, Robinson BH. Reverse micelles as hosts for proteins and small molecules. BIOCHIMICA ET BIOPHYSICA ACTA 1988; 947:209-46. [PMID: 3278740 DOI: 10.1016/0304-4157(88)90025-1] [Citation(s) in RCA: 631] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- P L Luisi
- Institut für Polymere, ETH-Zürich, Switzerland
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