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Xia C, Shen X. Analysis of factors influencing on Electro-Fenton and research on combination technology (II): a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:46910-46948. [PMID: 38995339 DOI: 10.1007/s11356-024-34159-z] [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: 10/27/2023] [Accepted: 06/24/2024] [Indexed: 07/13/2024]
Abstract
The principle of Fenton reagent is to produce ·OH by mixing H2O2 and Fe2+ to realize the oxidation of organic pollutants, although Fenton reagent has the advantages of non-toxicity and short reaction time, but there are its related defects. The Fenton-like technology has been widely studied because of its various forms and better results than the traditional Fenton technology in terms of pollutant degradation efficiency. This paper reviews the electro-Fenton technology among the Fenton-like technologies and provides an overview of the homogeneous electro-Fenton. It also focuses on summarizing the effects of factors such as H2O2, reactant concentration, reactor volume and electrode quality, reaction time and voltage (potential) on the efficiency of electro-Fenton process. It is shown that appropriate enhancement of H2O2 concentration, voltage (potential) and reaction volume can help to improve the process efficiency; the process efficiency also can be improved by increasing the reaction time and electrode quality. Feeding modes of H2O2 have different effects on process efficiency. Finally, a considerable number of experimental studies have shown that the combination of electro-Fenton with ultrasound, anodic oxidation and electrocoagulation technologies is superior to the single electro-Fenton process in terms of pollutant degradation.
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Affiliation(s)
- Chongjie Xia
- School of Environmental and Chemical Engineering, Shenyang University of Technology, 110870, Shenyang, People's Republic of China
| | - Xinjun Shen
- School of Environmental and Chemical Engineering, Shenyang University of Technology, 110870, Shenyang, People's Republic of China.
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2
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Liu S, Long Z, Liu H, Wang Y, Zhang J, Zhang G, Liang J. Recent advances in ultrasound-Fenton/Fenton-like technology for degradation of aqueous organic pollutants. CHEMOSPHERE 2024; 352:141286. [PMID: 38311041 DOI: 10.1016/j.chemosphere.2024.141286] [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: 11/06/2023] [Revised: 01/20/2024] [Accepted: 01/21/2024] [Indexed: 02/06/2024]
Abstract
Organic pollutants in water are a serious problem because of their widespread presence, harming the ecosystem and human health. Of the commonly used advanced oxidation processes, a hybrid of ultrasound and the Fenton/Fenton-like technology has received increasing attention in treatment of aqueous organic pollutants. This hybrid is effective in degradation of organic pollutants, but its application has not been summarised. Herein, first, the application and influencing factors of this hybrid technology for organic pollutants degradation are introduced. Second, the mechanism of its action is discussed. Third, the current challenges and future perspectives associated with this technology are proposed. This review provides valuable information regarding this technology, deepens the understanding of its mechanisms of organic pollutants degradation and provides a reference for its use in treatment of aquatic environments.
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Affiliation(s)
- Shiqi Liu
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China
| | - Zeqing Long
- Department of Public Health and Preventive Medicine, Changzhi Medical College, Changzhi, 046000, China
| | - Huize Liu
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China
| | - Ying Wang
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China
| | - Jie Zhang
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China
| | - Guangming Zhang
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China.
| | - Jinsong Liang
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China
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3
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Dey A, Gogate PR. Comparative study of different ultrasound based hybrid oxidation approaches for treatment of real effluent from coke oven plant. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 352:120095. [PMID: 38266523 DOI: 10.1016/j.jenvman.2024.120095] [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: 11/25/2023] [Revised: 01/03/2024] [Accepted: 01/08/2024] [Indexed: 01/26/2024]
Abstract
The present study investigates the treatment of real coke plant effluent utilising several ultrasound-based hybrid oxidation approaches including Ultrasound (US) alone, US + catalyst, US + H2O2, US + Fenton, US + Ozone, and US + Peroxone, with main objective as maximizing the reduction of chemical oxygen demand (COD). Ultrasonic horn at power of 130 W, frequency as 20 kHz and duty cycle as 70% was applied. Study with varying catalyst (TiO2) dose from 0.5 g/L - 2 g/L revealed 1 g/L as the optimum dose resulting in 65.15% reduction in COD. A 40 ml/L dose of H2O2 was shown to be optimal, giving an 81.96% reduction in COD, based on the study of varied doses of H2O2 from 20 ml/L to 60 ml/L. US + Fenton reagent combination at optimum Fe2+/H2O2 (w/v) ratio of 1:1 resulted in a COD reduction of 85.29% whereas reduction of COD as 81.75% was obtained at the optimum flow rate of ozone as 1 LPM for US + Ozone approach. US + Peroxone demonstrated the best efficiency (90.48%) for COD reduction. To find the toxicity effects, the treated (US + peroxone) and non-treated samples were tested for the growth of bacterial cultures. It was observed that the toxicity of the treated sample increased only marginally after treatment. High-resolution liquid chromatography mass spectrometry (HR-LCMS) analysis was also performed to establish intermediate compounds. Overall, the coupling of ultrasound with oxidation processes produced better results with US + Peroxone established as best treatment approach for coke plant effluent.
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Affiliation(s)
- Ananya Dey
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai, 400 019, India
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai, 400 019, India.
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4
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Li Y, Zhang W, Mu K, Li S, Wang J, Zhang S, Wang L. An Ultrasound-Fenton Process for the Degradation of 2,4,6-Trinitrotoluene. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:3102. [PMID: 36833797 PMCID: PMC9961213 DOI: 10.3390/ijerph20043102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/04/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
2,4,6-Trinitrotoluene (TNT), one of the main compounds in ammunition wastewater, is harmful to the environment. In this study, the treatment efficiency of 2,4,6-TNT by different treatment processes, including ferrous ion (Fe2+), hydrogen peroxide (H2O2), Fenton, ultrasound (US) irradiation, US + Fe2+, US + H2O2 and US-Fenton process, was compared. The results showed that US-Fenton was the most effective among all methods studied. The effects of initial pH, reaction time and H2O2 to Fe2+ molar ratio were investigated. The results showed that the removal of TNT, TOC and COD was maximum at an initial pH of 3.0 and H2O2 to Fe2+ molar ratio of 10:1. TNT, TOC and COD removal was fast in the first 30 min, reaching 83%, 57% and 50%, then increased gradually to 99%, 67% and 87% until 300 min, respectively. Semi-batch mode operation increased the removal of TNT and TOC by approximately 5% and 10% at 60 min, respectively. The average carbon oxidation number (ACON) was increased from -1.7 at 30 min to a steady-state value of 0.4, indicating the mineralization of TNT. Based on GC-MS analysis, 1,3,5-trinitrobenzene, 2,4,6-trinitrobenzene acid, 3,5-dinitrobenznamine and 3,5-dinitro-p-toluidine were the major byproducts from the US-Fenton process. The TNT degradation pathway was proposed, which involved methyl group oxidation, decarboxylation, aromatic ring cleavage and hydrolysis.
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Affiliation(s)
- Yangang Li
- Research and Development Center, Beijing Drainage Group Co., Ltd., Beijing 100044, China
| | - Wenzhen Zhang
- Research and Development Center, Beijing Drainage Group Co., Ltd., Beijing 100044, China
| | - Kelei Mu
- Research and Development Center, Beijing Drainage Group Co., Ltd., Beijing 100044, China
| | - Shangkun Li
- Research and Development Center, Beijing Drainage Group Co., Ltd., Beijing 100044, China
| | - Jiawei Wang
- Research and Development Center, Beijing Drainage Group Co., Ltd., Beijing 100044, China
| | - Shujun Zhang
- Research and Development Center, Beijing Drainage Group Co., Ltd., Beijing 100044, China
| | - Lu Wang
- Laoshan Laboratory, Qingdao 266237, China
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Fenton Reaction–Unique but Still Mysterious. Processes (Basel) 2023. [DOI: 10.3390/pr11020432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
This study is devoted to the Fenton reaction, which, despite hundreds of reports in a number of scientific journals, provides opportunities for further investigation of its use as a method of advanced oxidation of organic macro- and micropollutants in its diverse variations and hybrid systems. It transpires that, for example, the choice of the concentrations and ratios of basic chemical substances, i.e., hydrogen peroxide and catalysts based on the Fe2+ ion or other transition metals in homogeneous and heterogeneous arrangements for reactions with various pollutants, is for now the result of the experimental determination of rather randomly selected quantities, requiring further optimizations. The research to date also shows the indispensability of the Fenton reaction related to environmental issues, as it represents the pillar of all advanced oxidation processes, regarding the idea of oxidative hydroxide radicals. This study tries to summarize not only the current knowledge of the Fenton process and identify its advantages, but also the problems that need to be solved. Based on these findings, we identified the necessary steps affecting its further development that need to be resolved and should be the focus of further research related to the Fenton process.
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Mehdaoui R, Agren S, El Haskouri J, Beyou E, Lahcini M, Baouab MHV. An optimized sono-heterogeneous Fenton degradation of olive-oil mill wastewater organic matter by new magnetic glutarlaldehyde-crosslinked developed cellulose. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:20450-20468. [PMID: 36258114 DOI: 10.1007/s11356-022-23276-2] [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: 05/04/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
The present study highlights the olive mill wastewater (OMW) treatment characteristics through a sono-heterogeneous Fenton process using new designed [GTA-(PDA-g-DAC) @Fe3O4] and characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), magnetic properties measurements, and point of zero charge (pH pzc) analysis. A preliminary removal study showed significant degradation efficiency (75%) occurred combining the magnetic synthesized catalyst [GTA-(PDA-g-DAC)@Fe3O4] ([catalyst] = 2 g/L) with US /H2O2 and maintaining 500WL-1 ultrasonic power (US). The values obtained by US only were (13%), H2O2/US (18%), US/Fe3O4 (28%), and US /Fe3O4/H2O2(35%). The catalytic findings have shown that [GTA-(PDA-g-DAC)@Fe3O4] exhibited good properties for OMW compound's degradation. The sonocatalytic process coupling and extra oxidant addition resulted in the degradation substantial levels. For instance, the concomitant effect of degradation optimized parameters; H2O2 10 mM, [GTA-(PDA-g-DAC) @Fe3O4] nanocomposites 2.5 g/L, at pH 3, and T 35 °C for 70 min resulted in an almost complete mineralization of aqueous OMW solution followed by a significant decolorization. Oxidation results exhibited efficient degradation rates in total phenolic compounds (TPC), total amino compounds (TAC), and chemical oxygen demand (COD) oxidation rate were 89.88, 92.75, and 95.66 respectively following the optimized sono-heterogeneous catalytic Fenton process. The prepared magnetic catalyst exhibited a good stability during repeated cycles. The gathered findings gave the evidence that sono-heterogeneous catalytic Fenton process is a promising treatment technology for OMW effluents.
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Affiliation(s)
- Rahma Mehdaoui
- Research Unit Materials and Organic Synthesis (UR17ES31), Preparatory Institute for Engineering Studies of Monastir, University of Monastir, Avenue of the Environment, 5000, Monastir, Tunisia
| | - Soumaya Agren
- Research Unit Materials and Organic Synthesis (UR17ES31), Preparatory Institute for Engineering Studies of Monastir, University of Monastir, Avenue of the Environment, 5000, Monastir, Tunisia
- Department of Inorganic Chemistry, Instituto de Ciencias de Los Materiales de la Universitad de Valencia, Calle Catedratico José Beltran 2, 46980, Paterna, Valencia, Spain
| | - Jamal El Haskouri
- Department of Inorganic Chemistry, Instituto de Ciencias de Los Materiales de la Universitad de Valencia, Calle Catedratico José Beltran 2, 46980, Paterna, Valencia, Spain
| | - Emmanuel Beyou
- Department of Material's Engineering, Université Lyon 1, UMR CNRS5223, Ingénierie des Matériaux Polymères, Villeurbanne, France
| | - Mohammed Lahcini
- Laboratory of organometallic and macromolecular chemistry-composites Materials, Faculty of Sciences and Technologies, Cadi Ayyad University, Avenue Abdelhakim Elkhattabi, BP549, 40000, Marrakech, Morocco
- Mohamed VI Polytechnic University, Lot 660, Hay Moulay Rachid, 43150, Ben Guerir, Morocco
| | - Mohamed Hassen V Baouab
- Research Unit Materials and Organic Synthesis (UR17ES31), Preparatory Institute for Engineering Studies of Monastir, University of Monastir, Avenue of the Environment, 5000, Monastir, Tunisia.
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Amarzadeh M, Salehizadeh S, Damavandi S, Mubarak NM, Ghahrchi M, Ramavandi B, Shahamat YD, Nasseh N. Statistical modeling optimization for antibiotics decomposition by ultrasound/electro-Fenton integrated process: Non-carcinogenic risk assessment of drinking water. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 324:116333. [PMID: 36208514 DOI: 10.1016/j.jenvman.2022.116333] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 09/17/2022] [Accepted: 09/17/2022] [Indexed: 06/16/2023]
Abstract
The present work proposes an ultrasound (US) assisted electro-Fenton (EF) process for eliminating penicillin G (PNG) and ciprofloxacin (CIP) from aqueous solutions and the process was further optimized by response surface methodology (RSM)- Box-Behnken design (BBD). The impact of pH, hydrogen peroxide (H2O2) concentration, applied voltage, initial pollutant concentration, and operating time were studied. The capability application of the electro-Fenton (EF) and US processes was compared separately and in combination under the optimum conditions of pH of 4, a voltage of 15 V, the initial antibiotic concentration of 20.7 mg/L, H2O2 concentration of 0.8 mg/L, and the operating time of 75 min. The removal efficiency of PNG and CIP using the sono-electro-Fenton (SEF) process, as the results revealed, was approximately 96% and 98%, respectively. The experiments on two scavengers demonstrated that ⦁OH contributes significantly to the CIP and PNG degradation by SEF, whereas ⦁O-2 corresponds to only a negligible amount. The total organic carbon (TOC) and chemical oxygen demand (COD) analyses were used to assess the mineralization of CIP and PNG. The efficiency of COD and TOC removal was reached at 73.25% and 62.5% for CIP under optimized operating circumstances, and at 61.52% and 72% for PNG, respectively. These findings indicate that a sufficient rate of mineralization was obtained by SEF treatment for the mentioned pollutants. The reaction kinetics of CIP and PNG degradation by the SEF process were found to follow a pseudo-first-order kinetic model. In addition, the human health risk assessment of natural water containing CIP and PNG that was purified by US, EF, and SEF processes was done for the first time. According to the findings, the non-carcinogenic risk (HQ) caused by drinking purified water by all three systems was calculated in the acceptable range. Thus, SEF is a proper system to remove various antibiotics in potable water and reduces their human health risks.
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Affiliation(s)
- Mohamadamin Amarzadeh
- Department of Safety Engineering, Abadan Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran.
| | - Saeed Salehizadeh
- Department of Chemical Engineering, Abadan Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran.
| | - Sobhan Damavandi
- Department of Inspection Engineering, Abadan Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran.
| | - Nabisab Mujawar Mubarak
- Petroleum and Chemical Engineering, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri Begawan BE1410, Brunei Darussalam.
| | - Mina Ghahrchi
- Department of Environmental Health Engineering, Torbat Jam Faculty of Medical Sciences, Torbat Jam, Iran.
| | - Bahman Ramavandi
- Environmental Health Engineering Department, Faculty of Health and Nutrition, Bushehr University of Medical Sciences, Bushehr, Iran.
| | - Yousef Dadban Shahamat
- Department of Environmental Health Engineering, Faculty of Health, Golestan University of Medical Sciences, Gorgan, Iran.
| | - Negin Nasseh
- Cellular and Molecular Research Center, Birjand University of Medical Sciences, Birjand, Iran.
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Wenqiang X, Shan J. Cod Removal From Actual Industrial Wastewater Using A Three‐Dimensional Electrochemical Apparatus. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Jiang Shan
- Sichuan International Studies University Chongqing China
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10
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Kodavatiganti S, Bhat AP, Gogate PR. Intensified degradation of Acid Violet 7 dye using ultrasound combined with hydrogen peroxide, Fenton, and persulfate. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119673] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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11
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Degradation of amoxicillin from water by ultrasound-zero-valent iron activated sodium persulfate. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119080] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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12
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Hung CM, Huang CP, Chen CW, Hsieh S, Dong CD. Remediation of contaminated dredged harbor sediments by combining hydrodynamic cavitation, hydrocyclone, and persulfate oxidation process. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126594. [PMID: 34293689 DOI: 10.1016/j.jhazmat.2021.126594] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 06/20/2021] [Accepted: 07/04/2021] [Indexed: 06/13/2023]
Abstract
A pilot-scale hybrid treatment system consisting of hydrodynamic cavitation (HC), hydrocyclone separator (HS), and sodium persulfate (PS), was employed for removing polycyclic aromatic hydrocarbons (PAHs) from dredged harbor sediments. The effectiveness of PAH degradation was studied by varying the inlet pressure (0-2.0 bar), PS dosage (or Σ[PAH] to [PS] mole ratio of 1:1-1:103) at HS inflow velocity of 2.85 m/s, slurry concentration of 10%, and reaction time of 60 min. The degradation rate of PAH in the overflow (OF) sediment was significantly lower than that of the underflow (UF) sediment. After an inlet pressure increase of 0.5 bar and ΣPAH: [PS] molar ratio of 1: 10, the PAH removal was 87% and 55% in the UF and OF, respectively, by the combined HC-PS-HS unit. Without PS, the PAHs removal was 46% and 40% in the UF and OF, respectively. The removal efficiency for 6-, 5-, 4-, 3-, and 2-ring PAHs was 100%, 93%, 93%, 92%, and 82% in the UF and 55%, 61%, 67%, 47%, and 36% in the OF by the combined HC-PS-HS system. FEEM spectroscopy clarified that aromatic protein-based components (tryptophan- and tyrosine-like combined) were gradually degraded and transformed into soluble microbial metabolites when organic matter content declined during the combined HC-PS-HS treatment. This study provides new insights into the combined HC-PS-HS system for PAH degradation in dredged sediments.
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Affiliation(s)
- Chang-Mao Hung
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - Chin-Pao Huang
- Department of Civil and Environmental Engineering, University of Delaware, Newark, USA
| | - Chiu-Wen Chen
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - Shuchen Hsieh
- Department of Chemistry, National Sun Yat-Sen University, Kaohsiung City, Taiwan
| | - Cheng-Di Dong
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan.
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Hung CM, Huang CP, Chen CW, Dong CD. Hydrodynamic cavitation activation of persulfate for the degradation of polycyclic aromatic hydrocarbons in marine sediments. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 286:117245. [PMID: 33965800 DOI: 10.1016/j.envpol.2021.117245] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 04/09/2021] [Accepted: 04/23/2021] [Indexed: 06/12/2023]
Abstract
Hydrodynamic cavitation (HC) coupled with persulfate (PS)-based that resulted in the synergistic degradation of polycyclic aromatic hydrocarbons (PAHs) in contaminated marine sediments. The effects of HC injection pressure and Σ[PAH]: [PS] on the rate and extent of PAH degradation were studied in the pressure range of 0.5-2.0 bar, PS concentration rage of 2 × 10-4 to 2 × 10-2 M or Σ[PAH]: [PS] of 1:10-1000, and reaction time of 20-60 min. A pseudo-first-order rate law fitted PAHs removal kinetics well. The degradation rate constant increased with injection pressure, reaching the maximum level at 0.5 bar, then decreased at injection pressure became greater than 0.5 bar. The results showed that PAH removal was 84% by the combined HC and PS process, whereas, HC alone only achieved a 43% removal of PAHs in marine sediments under the optimal inlet pressure of 0.5 bar at PS concentration of 2 × 10-2 M in 60 min. The HC‒PS system effectively removed PH, PY, FLU, BaA, and CH at 91, 99, 91, 84, and 90%, respectively. The maximum removal of 6-, 5-, 4-, 3-, and 2-ring PAHs was 89, 87, 84, 76, and 34%, respectively. Major reactive oxygen species (ROSs), namely, SO4-• and HO•, were responsible for PAHs degradation. Results clearly highlighted the feasibility of HC-PS system for the clean-up of PAHs-laden sediments in particular and other recalcitrant organic contaminants in general.
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Affiliation(s)
- Chang-Mao Hung
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - Chin-Pao Huang
- Department of Civil and Environmental Engineering, University of Delaware, Newark, USA
| | - Chiu-Wen Chen
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - Cheng-Di Dong
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan.
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Agarkoti C, Gogate PR, Pandit AB. Comparison of acoustic and hydrodynamic cavitation based hybrid AOPs for COD reduction of commercial effluent from CETP. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 281:111792. [PMID: 33383477 DOI: 10.1016/j.jenvman.2020.111792] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 11/13/2020] [Accepted: 12/02/2020] [Indexed: 05/10/2023]
Abstract
The present work investigates the treatment of commercial effluent obtained from Common Effluent Treatment Plants (CETP) using acoustic cavitation (AC) and hydrodynamic cavitation (HC) based hybrid AOPs. Comparison of different hybrid AOPs viz. H2O2, Fe2+/H2O2, Fe2+/H2O2/Air, Fe2+/H2O2/S2O82- and Fe2+/H2O2/S2O82-/Air in combination with both AC and HC has been performed in terms of extent of chemical oxygen demand (COD) reduction and kinetic rate constants. The best results of COD reduction as 95.2% and 97.28% were obtained for AC/Fe2+/H2O2/Air and HC/Fe2+/H2O2/Air systems respectively at Fe2+/H2O2 ratio of 0.1 and pH of 2 within 60 min of treatment under conditions of ultrasonic power dissipation as 150 W, inlet pressure for HC as 4 bar (as applicable depending on process) and temperature of 30 ± 2 °C. Slightly lower efficacy was established for the combination approach involving AC or HC coupled with Fe2+-activated S2O82- and H2O2 yielding COD reduction of 82.9% and 86.93% for the AC/Fe2+/H2O2/S2O82-/Air and HC/Fe2+/H2O2/S2O82-/Air systems respectively at Fe2+/H2O2/S2O82- ratio of 1:40:17.5. Cost estimation on the basis of cavitational yield performed on the AC and HC based treatment systems revealed economical nature of HC based treatment. Kinetic studies were also performed by fitting the experimental data with pseudo first order kinetic model (PFOKM), generalized kinetic model (GKM) and Behnajady-Modirshahla-Ghanbery kinetic model (BMGKM). It was demonstrated that GKM provided best fitting for all the experiments whereas BMGKM was most suitable for Fenton based reactions. It was clearly established that complex CETP effluent can be effectively treated using the combined approaches based on HC with potential for larger scale operation.
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Affiliation(s)
- Chandrodai Agarkoti
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 40019, India
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 40019, India.
| | - Aniruddha B Pandit
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 40019, India
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Hasani K, Peyghami A, Moharrami A, Vosoughi M, Dargahi A. The efficacy of sono-electro-Fenton process for removal of Cefixime antibiotic from aqueous solutions by response surface methodology (RSM) and evaluation of toxicity of effluent by microorganisms. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.05.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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16
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Moores LC, Kennedy AJ, May L, Jordan SM, Bednar AJ, Jones SJ, Henderson DL, Gurtowski L, Gust KA. Identifying degradation products responsible for increased toxicity of UV-Degraded insensitive munitions. CHEMOSPHERE 2020; 240:124958. [PMID: 31726587 DOI: 10.1016/j.chemosphere.2019.124958] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 09/21/2019] [Accepted: 09/23/2019] [Indexed: 06/10/2023]
Abstract
Degradation of insensitive munitions (IMs) by ultraviolet (UV) light has become a topic of concern following observations that some UV-degradation products have increased toxicity relative to parent compounds in aquatic organisms. The present investigation focused on the Army's IM formulation, IMX-101, which is composed of three IM constituents: 2,4-dinitroanisole (DNAN), 3-nitro-1,2,4-triazol-5-one (NTO), and nitroguanidine (NQ). The IM constituents and IMX-101 were irradiated in a UV photo-reactor and then administered to Daphnia pulex in acute (48 h) exposures comparing toxicities relative to the parent materials. UV-degradation of DNAN had little effect on mortality whereas mortality for UV-degraded NTO and NQ (and associated degradation products) increased by factors of 40.3 and 1240, respectively, making UV-degraded NQ the principle driver of toxicity when IMX-101 is UV-degraded. Toxicity investigations for specific products formed during UV-degradation of NQ, confirmed greater toxicity than the parent NQ for degradation products including guanidine, nitrite, ammonia, nitrosoguanidine, and cyanide. Summation of the individual toxic units for the complete set of individually measured UV-degradation products identified for NQ only accounted for 25% of the overall toxicity measured in the exposures to the UV-degraded NQ product mixture. From these toxic unit calculations, nitrite followed by CN- were the principal degradation products contributing to toxicity. Given the underestimation of toxicity using the sum toxic units for the individually measured UV-degradation products of NQ, we conclude that: (1) other unidentified NQ degradation products contributed principally to toxicity and/or (2) synergistic toxicological interactions occurred among the NQ degradation product mixture that exacerbated toxicity.
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Affiliation(s)
- Lee C Moores
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS, 39180, USA.
| | - Alan J Kennedy
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS, 39180, USA
| | - Lauren May
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS, 39180, USA
| | - Shinita M Jordan
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS, 39180, USA
| | - Anthony J Bednar
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS, 39180, USA
| | - Stacy J Jones
- HX5, 212 Eglin Parkway SE, Ft, Walton Beach, FL, 32548, USA
| | - David L Henderson
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS, 39180, USA
| | - Luke Gurtowski
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS, 39180, USA
| | - Kurt A Gust
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS, 39180, USA
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Zarghi MH, Jaafarzadeh N, Roudbari A, Zahedi A. Application of surface response method (RSM) to optimize ammonia nitrogen removal from fresh leachate using combination of ultrasound and ultraviolet. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 81:358-366. [PMID: 32333668 DOI: 10.2166/wst.2020.116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Ammonia nitrogen levels are very high in leachate. This study was conducted to optimize the removal of ammonia nitrogen from fresh landfill leachate using a combination of ultrasound waves and ultraviolet irradiation. A sample of fresh landfill leachate was obtained from a municipal landfill site, located in Shahroud (Semnan, Iran) and its ammonia nitrogen was measured by spectrophotometric method. Ultrasound and ultraviolet irradiation were simultaneously used to remove ammonia nitrogen. Box-Behnken design (BBD) based on response surface method (RSM) was applied to analyze and optimize ammonia nitrogen removal by different variables, including pH, contact time, ultrasound frequency and UV intensity. Based on this method, 29 samples with three replications were tested. The analysis of variance indicated quadratic model was significant for removal of ammonia nitrogen from leachate. According to the model, 99.7% removal efficiency (%) of ammonia nitrogen was obtained in the optimal conditions (pH at 9.7, contact time of 59.1 min, ultrasound frequency of 54 kHz and UV intensity of 40 W). The removal efficiency of ammonia nitrogen was obtained 98.6% from the laboratory experiment in these conditions, which agrees well with the predicted response value.
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Affiliation(s)
- Mohammad Hasan Zarghi
- Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran E-mail: ;
| | - Neamat Jaafarzadeh
- Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran E-mail: ;
| | - Aliakbar Roudbari
- Center for Social and Behavioral Sciences Research, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Amir Zahedi
- Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran E-mail: ;
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Tiwari J, Tarale P, Sivanesan S, Bafana A. Environmental persistence, hazard, and mitigation challenges of nitroaromatic compounds. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:28650-28667. [PMID: 31388957 DOI: 10.1007/s11356-019-06043-8] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 07/22/2019] [Indexed: 05/15/2023]
Abstract
Nitroaromatic compounds (NACs) are extensively used in different industries and are synthesized in large quantity due to their heavy demand worldwide. The broad use of NACs poses a serious pollution threat. The treatment processes used for the removal of NACs are not effective and sustainable, leading to their release into the environment. The nitro group attached to benzene ring makes the compounds recalcitrant due to which they persist in the environment. Being hazardous to human as well as other living organisms, NACs are listed in the USEPA's priority pollutant group. This review provides updated information on the sources of NACs, prevalence in different environmental matrices, and recent developments in methods of their detection, with emphasis on current trends as well as future prospects. The harmful effects of NACs due to exposure through different routes are also highlighted. Further, the technologies reported for the treatment of NACs, including physico-chemical and biological methods, and the challenges faced for their effective implementation are discussed. Thus, the review discusses relevant issues in detail making suitable recommendations, which can be helpful in guiding further research in this subject.
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Affiliation(s)
- Jyoti Tiwari
- AcSIR (Academy of Scientific and Innovative Research), CSIR-NEERI (National Environmental Engineering Research Institute) Campus, Nagpur, 440020, India
- Director's Research Cell, CSIR-NEERI (National Environmental Engineering Research Institute), Nagpur, 440020, Maharashtra, India
| | - Prashant Tarale
- Health and Toxicity Cell, CSIR-NEERI (National Environmental Engineering Research Institute), Nagpur, 440020, India
- Blood Research Institute, Versiti Wisconsin, 8727 Watertown Plank Road, Milwaukee, WI, 53213, USA
| | - Saravanadevi Sivanesan
- AcSIR (Academy of Scientific and Innovative Research), CSIR-NEERI (National Environmental Engineering Research Institute) Campus, Nagpur, 440020, India
- Health and Toxicity Cell, CSIR-NEERI (National Environmental Engineering Research Institute), Nagpur, 440020, India
| | - Amit Bafana
- AcSIR (Academy of Scientific and Innovative Research), CSIR-NEERI (National Environmental Engineering Research Institute) Campus, Nagpur, 440020, India.
- Director's Research Cell, CSIR-NEERI (National Environmental Engineering Research Institute), Nagpur, 440020, Maharashtra, India.
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Step by step procedures: Degradation of polycyclic aromatic hydrocarbons in potable water using photo-Fenton oxidation process. MethodsX 2019; 6:1701-1705. [PMID: 31388505 PMCID: PMC6676041 DOI: 10.1016/j.mex.2019.07.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are carcinogenic compounds, composed of two or more fused benzene rings and abundantly found in mixed-use areas. Mixed-use areas consist of dense population, urbanization, industrial and agricultural activities. River pollution are common in mixed-use areas and 98% of Malaysia's fresh water supply originates from surface water. The biological degradation, adsorption and advanced oxidation process were documented as the available PAHs treatment for water. To date, the application of the photo-Fenton oxidation process has been reported for the treatment of PAHs from contaminated soil (review paper), landfill leachate, municipal solid waste leachate, sanitary landfill leachate, aniline wastewater, ammunition wastewater and saline aqueous solutions. As for potable water, the application of Fenton reagent was aided with photo treatment or electrolysis not focusing on PAHs removal. The presented MethodsX was conducted for PAHs degradation analysis in potable water samples using photo-Fenton oxidation process. The designed reactor for batch experiment is presented. The batch experiment consists of parameters like concentration of 17 USEPA-PAHs in the prepared aqueous solution (fixed variable), reaction time, pH and molarity ratio of hydrogen peroxide (H2O2): ferrous sulfate (FeSO4).
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Abd Manan TSB, Khan T, Sivapalan S, Jusoh H, Sapari N, Sarwono A, Ramli RM, Harimurti S, Beddu S, Sadon SN, Kamal NLM, Malakahmad A. Application of response surface methodology for the optimization of polycyclic aromatic hydrocarbons degradation from potable water using photo-Fenton oxidation process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 665:196-212. [PMID: 30772550 DOI: 10.1016/j.scitotenv.2019.02.060] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 02/03/2019] [Accepted: 02/04/2019] [Indexed: 06/09/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are carcinogenic compounds, composed of benzene rings. The objective of this research was to identify the optimum condition for the degradation of PAHs contaminated water using photo-Fenton oxidation process via response surface methodology (RSM). Aqueous solution was prepared and potable water samples were collected from water treatment plants in Perak Tengah, Perak, Malaysia in September 2016. The reaction time, pH, molarity of H2O2 and FeSO4 were analyzed followed by RSM using aqueous solution. A five level central composite design with quadratic model was used to evaluate the effects and interactions of these parameters. The response variable was the percentage of total organic carbon (TOC) removal. PAHs quantification was done using gas chromatography mass spectrometry analysis. The regression line fitted well with the data with R2 value of 0.9757. The lack of fit test gives the highest value of Sum of Squares (15,666.64) with probability F value 0.0001 showing significant quadratic model. The optimum conditions were established corresponding to the percentage of TOC removal. The PAHs removal efficiency for potable water samples ranged from 76.4% to 91% following the first order of kinetic rates with R2 values of >0.95. Conventional water treatment techniques are not effective for PAHs removal. Thus, advanced oxidation processes may be considered as an alternative to conventional water treatment techniques in Malaysia and other developing countries.
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Affiliation(s)
- Teh Sabariah Binti Abd Manan
- Civil & Environmental Engineering Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia.
| | - Taimur Khan
- Civil & Environmental Engineering Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia
| | - Subarna Sivapalan
- Management & Humanities Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia
| | - Hisyam Jusoh
- Civil & Environmental Engineering Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia
| | - Nasiman Sapari
- Civil & Environmental Engineering Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia
| | - Ariyanti Sarwono
- Department of Environmental Engineering, Pertamina University, Kebayoran Lama, 12220 Jakarta, Indonesia
| | - Raihan Mahirah Ramli
- Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia
| | | | - Salmia Beddu
- Department of Civil Engineering, Universiti Tenaga Nasional, Jalan Ikram-Uniten, 43000 Kajang, Selangor Darul Ehsan, Malaysia
| | - Siti Nabihah Sadon
- Department of Civil Engineering, Universiti Tenaga Nasional, Jalan Ikram-Uniten, 43000 Kajang, Selangor Darul Ehsan, Malaysia
| | - Nur Liyana Mohd Kamal
- Department of Civil Engineering, Universiti Tenaga Nasional, Jalan Ikram-Uniten, 43000 Kajang, Selangor Darul Ehsan, Malaysia
| | - Amirhossein Malakahmad
- Civil & Environmental Engineering Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia
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Optimization the Effects of Physicochemical Parameters on the Degradation of Cephalexin in Sono-Fenton Reactor by Using Box-Behnken Response Surface Methodology. Catal Letters 2019. [DOI: 10.1007/s10562-019-02713-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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22
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Rahmani AR, Mousavi-Tashar A, Masoumi Z, Azarian G. Integrated advanced oxidation process, sono-Fenton treatment, for mineralization and volume reduction of activated sludge. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 168:120-126. [PMID: 30384159 DOI: 10.1016/j.ecoenv.2018.10.069] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 10/16/2018] [Accepted: 10/18/2018] [Indexed: 06/08/2023]
Abstract
In this work, the efficiencies of Fenton catalytic and sonolysis processes were investigated separately and in combination together for the treatment and reduction of sludge volume. Moreover, the effects of operating parameters such as retention time, initial pH, iron concentration, and H2O2 concentration on COD reduction as well as the proportion of volatile solids to total solids (VS/TS) were studied. Finally, the effects of these processes on the sludge volume index (SVI) and sludge volume reduction (SVR) were evaluated. According to the results, the retention time of 60 min, pH = 3, hydrogen peroxide concentration of 0.13 M/L, and iron concentration of 2 mM/L were achieved as the optimum values. Furthermore, the SVR and SVI removal efficiencies in the Fenton process were 19% and 25%, respectively, but the removal efficiency in sonolysis process was very low and can be ignored. Under optimum conditions in sono-Fenton (SF) process, the SVR and SVI removal efficiencies were 55.7% and 83%, respectively. The results showed that by combining sonolysis and Fenton processes; due to the synergistic effect of ultrasonic waves, Fenton agent, and the production of more hydroxyl radicals; the COD removal efficiency increased to 77%, and the proportion of VS/TS in row activated sludge was reduced from 75% to 26%. Generally, by combining sonolysis and Fenton processes, the removal efficiency increased significantly as compared to separate processes owing to the production of more oxidizing agents and improving mass transfer.
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Affiliation(s)
- Ali Reza Rahmani
- Department of Environmental Health Engineering, Faculty of Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
| | | | - Zeinab Masoumi
- Ilam University of Medical Sciences, Faculty of Health, Environmental Health Engineering Department, Banganjab Complex, Ilam, Iran
| | - Ghasem Azarian
- Department of Environmental Health Engineering, Faculty of Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran.
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Lotufo GR, Stanley JK, Chappell P, Melby NL, Wilbanks MS, Gust KA. Subchronic, chronic, lethal and sublethal toxicity of insensitive munitions mixture formulations relative to individual constituents in Hyalella azteca. CHEMOSPHERE 2018; 210:795-804. [PMID: 30041157 DOI: 10.1016/j.chemosphere.2018.07.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 07/03/2018] [Accepted: 07/10/2018] [Indexed: 06/08/2023]
Abstract
Insensitive munitions (IMs) are replacing conventional munitions, improving safety from unintended detonation. IMs are deployed in mixture formulations but little is known about their mixture toxicology. We characterized mixture effects of the IM formulations IMX-101 (mixture of 2,4-dinitroanisole [DNAN], 3-nitro-1,2,4-triazol-5-one [NTO], and nitroguanidine [NQ]) and IMX-104 (DNAN, NTO, and hexahydro-1,3,5-trinitro-1,3,5-triazine [RDX]) in subchronic (10 d) and chronic (35 d) water-only tests in Hyalella azteca assessing impacts on survival, growth and reproduction. In 10-d single chemical exposures, DNAN was the most potent constituent, eliciting an LC50 of 16.0 mg/L; the LC50s for NTO and NQ were 891 and 565 mg/L, respectively. RDX did not elicit significant mortality up to 29.5 mg/L, a concentration near its solubility limit. Based on toxic-units (TUs), the toxicity of IMX-101 was driven by the effective concentration of DNAN; however, the presence of NTO, RDX, or both elicited interactive effects causing an approximately 2-fold decrease in lethality for IMX-104. Growth reduction was observed in 10-d exposures to DNAN, IMX-101 and IMX-104, but not for NQ, NTO, or RDX. Longer exposure duration (35 d) to IMX-101, IMX-104, and DNAN resulted in 3-6 times higher sensitivity for lethality and resulted in the most sensitive endpoint for DNAN, RDX, and IMX-101 exposures, decreased reproduction. Slight, but statistically significant, antagonistic responses among IMX-101 constituents were observed for survival and reproduction at 35d. Overall, the results support response-additive summation as a sufficient method to provide conservative hazard assessments of subchronic, chronic, and sublethal IMX-101 and IMX-104 mixture impacts in H. azteca.
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Affiliation(s)
- Guilherme R Lotufo
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS, USA.
| | - Jacob K Stanley
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS, USA; Stanley Environmental Consulting, Waynesboro, MS 39367, USA
| | | | - Nicolas L Melby
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS, USA
| | - Mitchell S Wilbanks
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS, USA
| | - Kurt A Gust
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS, USA
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Kinetic and Mechanistic Study on Catalytic Decomposition of Hydrogen Peroxide on Carbon-Nanodots/Graphitic Carbon Nitride Composite. Catalysts 2018. [DOI: 10.3390/catal8100445] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The metal-free CDots/g-C3N4 composite, normally used as the photocatalyst in H2 generation and organic degradation, can also be applied as an environmental catalyst by in-situ production of strong oxidant hydroxyl radical (HO·) via catalytic decomposition of hydrogen peroxide (H2O2) without light irradiation. In this work, CDots/g-C3N4 composite was synthesized via an electrochemical method preparing CDots followed by the thermal polymerization of urea. Transmission electron microscopy (TEM), X-Ray diffraction (XRD), Fourier Transform Infrared (FTIR), N2 adsorption/desorption isotherm and pore width distribution were carried out for characterization. The intrinsic catalytic performance, including kinetics and thermodynamic, was studied in terms of catalytic decomposition of H2O2 without light irradiation. The second-order rate constant of the reaction was calculated to be (1.42 ± 0.07) × 10−9 m·s−1 and the activation energy was calculated to be (29.05 ± 0.80) kJ·mol−1. Tris(hydroxymethyl) aminomethane (Tris) was selected to probe the produced HO· during the decomposing of H2O2 as well as to buffer the pH of the solution. The composite was shown to be base-catalyzed and the optimal performance was achieved at pH 8.0. A detailed mechanism involving the adsorb-catalyze double reaction site was proposed. Overall, CDots/g-C3N4 composite can be further applied in advanced oxidation technology in the presence of H2O2 and the instinct dynamics and the mechanism can be referred to further applications in related fields.
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25
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Ayanda OS, Nelana SM, Naidoo EB. Ultrasonic degradation of aqueous phenolsulfonphthalein (PSP) in the presence of nano-Fe/H 2O 2. ULTRASONICS SONOCHEMISTRY 2018; 47:29-35. [PMID: 29908604 DOI: 10.1016/j.ultsonch.2018.04.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 04/18/2018] [Accepted: 04/21/2018] [Indexed: 06/08/2023]
Abstract
In this study, nano iron (nano-Fe) was successfully synthesized by sodium borohydride reduction of ferric chloride solution to enhance the ultrasonic degradation of phenolsulfonphthalein (PSP). The nano-Fe was characterized by scanning electron microscopy - energy dispersive spectroscopy (SEM-EDX), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), attenuated total reflection - Fourier transform infrared spectroscopy (ATR-FTIR), and Brunauer, Emmett and Teller (BET) surface area determination. Experimental results demonstrated that a combined ultrasonic/nano-Fe/H2O2 system was more effective for PSP removal in combination than they were individually and there was a significant difference between the combined and single processes. The ultrasonic/nano-Fe/H2O2 degradation follows the Langmuir-Hinshelwood (L-H) kinetic model. The addition of nano-Fe and H2O2 to the ultrasonic reactor greatly accelerated the degradation of PSP (25 mg/L) from 12.5% up to 96.5%. These findings indicated that ultrasonic degradation in the presence of nano-Fe and H2O2 is a promising and efficient technique for the elimination of emerging micropollutants from aqueous solution.
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Affiliation(s)
- Olushola S Ayanda
- Department of Chemistry, Vaal University of Technology, Vanderbijlpark 1900, South Africa; Nanoscience Research, Department of Industrial Chemistry, Federal University Oye Ekiti, P.M.B 373, Oye Ekiti, Ekiti State, Nigeria.
| | - Simphiwe M Nelana
- Department of Chemistry, Vaal University of Technology, Vanderbijlpark 1900, South Africa
| | - Eliazer B Naidoo
- Department of Chemistry, Vaal University of Technology, Vanderbijlpark 1900, South Africa
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26
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Lent EM, Mullins AB, May AD, Honnold CL, Despain KE. Characterization of the Testicular Toxicity of 3-Nitro-1,2,4-Triazol-5-One and 2,4-Dinitroanisole in Rats (Rattus norvegicus). Int J Toxicol 2018; 37:364-372. [DOI: 10.1177/1091581818789878] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Nitrotriazolone (3-nitro-1,2,4-triazol-5-one; NTO) and dinitroanisole (2,4-dinitroanisole; DNAN), insensitive energetic materials used in explosive formulations, have induced testicular toxicity and oligospermia in repeated-dose oral toxicity tests. To identify the target site of testicular toxicity of NTO and DNAN, Sprague Dawley rats were orally dosed with NTO (500 mg/kg/d) or DNAN (50 or 100 mg/kg/d) in corn oil for 1, 3, 7, or 14 days. Degeneration of germinal epithelium occurred in multiple tubule stages on days 7 and 14 in treated rats. Degeneration increased in severity with time and was characterized by degeneration/apoptosis of pachytene spermatocytes and round and elongating spermatids, depletion of step 19 spermatids, luminal spermatogenic cell sloughing, multinucleate cells, and pronounced Sertoli cell vacuolation. Serum luteinizing hormone and follicle-stimulating hormone did not differ between NTO- and DNAN-treated and control rats on any sampling day. Serum testosterone levels reduced only in rats given 50 mg/kg/d DNAN for 7 days. These results suggest that the initial site of testicular injury for both NTO and DNAN is the Sertoli cell.
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Affiliation(s)
- Emily May Lent
- Army Public Health Center, Aberdeen Proving Ground, MD, USA
| | - Anna B. Mullins
- Uniformed Services University of Health Sciences, Bethesda, MD, USA
| | | | - Cary L. Honnold
- US Army Medical Institute of Chemical Defense, Aberdeen Proving Ground, MD, USA
| | - Kenneth E. Despain
- US Army Medical Institute of Chemical Defense, Aberdeen Proving Ground, MD, USA
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27
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Gust KA, Lotufo GR, Stanley JK, Wilbanks MS, Chappell P, Barker ND. Transcriptomics provides mechanistic indicators of mixture toxicology for IMX-101 and IMX-104 formulations in fathead minnows (Pimephales promelas). AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2018; 199:138-151. [PMID: 29625381 DOI: 10.1016/j.aquatox.2018.03.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 03/16/2018] [Accepted: 03/17/2018] [Indexed: 06/08/2023]
Abstract
Within the US military, new insensitive munitions (IMs) are rapidly replacing conventional munitions improving safety from unintended detonation. Toxicity data for IM chemicals are expanding rapidly, however IM constituents are typically deployed in mixture formulations, and very little is known about their mixture toxicology. In the present study we sought to characterize the mixture effects and toxicology of the two predominant IM formulations IMX-101 and IMX-104 in acute (48 h) larval fathead minnow (Pimephales promelas) exposures. IMX-101 consists of a mixture of 2,4-dinitroanisole (DNAN), 3-nitro-1,2,4-triazol-5-one (NTO), and nitroguanidine (NQ) while IMX-104 is composed of DNAN, NTO, and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX). DNAN was the most potent constituent in IMX-101 eliciting an LC50 of 36.1 mg/L, whereas NTO and NQ did not elicit significant mortality in exposures up to 1040 and 2640 mg/L, respectively. Toxic unit calculations indicated that IMX-101 elicited toxicity representative of the component concentration of DNAN within the mixture. Toxicogenomic responses for the individual constituents of IMX-101 indicated unique transcriptional expression and functional responses characteristic of: oxidative stress, impaired energy metabolism, tissue damage and inflammatory responses in DNAN exposures; impaired steroid biosynthesis and developmental cell-signaling in NQ exposures; and altered mitogen-activated protein kinase signaling in NTO exposures. Transcriptional responses to the IMX-101 mixture were driven by the effects of DNAN where expression and functional responses were nearly identical comparing DNAN alone versus the fractional equivalent of DNAN within IMX-101. Given that each individual constituent of the IMX-101 mixture elicited unique functional responses, and NTO and NQ did not interact with DNAN within the IMX-101 mixture exposure, the overall toxicity and toxicogenomic responses within acute exposures to the IMX-101 formulation are indicative of "independent" mixture toxicology. Alternatively, in the IMX-104 exposure both DNAN and RDX were each present at concentrations sufficient to elicit lethality (RDX LC50 = 28.9 mg/L). Toxic-unit calculations for IMX-104 mixture formulation exposures indicated slight synergistic toxicity (ΣTU LC50 = 0.82, 95% confidence interval = 0.73-0.90). Unique functional responses relative to DNAN were observed in the IMX-104 exposure including responses characteristic of RDX exposure. Based on previous transcriptomics responses to acute RDX exposures in fathead minnow larvae, we hypothesize that the potentially synergistic responses within the IMX-104 mixture are related to interactive effects of each DNAN and RDX on oxidative stress mitigation pathways.
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Affiliation(s)
- Kurt A Gust
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS, USA.
| | - Guilherme R Lotufo
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS, USA
| | - Jacob K Stanley
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS, USA; Stanley Environmental Consulting, Waynesboro, MS, USA
| | - Mitchell S Wilbanks
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS, USA
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Flouret A, de Almeida MC, de Oliveira TF, de Sá FP. Advanced treatment of phenol by H 2O 2/UV/activated carbon coupling: Influence of homogeneous and heterogeneous phase. CAN J CHEM ENG 2018. [DOI: 10.1002/cjce.23186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Alexandre Flouret
- Institute Superior d’ Agriculture - ISA - Lille; 48 Boulevard Vauban 59046 Lille Cedex France
| | - Maria Carolina de Almeida
- School of Agronomy and Food Engineering; Federal University of Goiás-UFG; Km-0, Caixa Postal 131 CEP 74690-900 Goiânia Brasil
| | - Tatianne Ferreira de Oliveira
- School of Agronomy and Food Engineering; Federal University of Goiás-UFG; Km-0, Caixa Postal 131 CEP 74690-900 Goiânia Brasil
| | - Fernando Pereira de Sá
- Federal Institutes of Education; Science and Technology of Goiás − IFG; Inhumas Goiás Brazil
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29
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Man X, Ning XA, Zou H, Liang J, Sun J, Lu X, Sun J. Removal of polycyclic aromatic hydrocarbons (PAHs) from textile dyeing sludge by ultrasound combined zero-valent iron/EDTA/Air system. CHEMOSPHERE 2018; 191:839-847. [PMID: 29107225 DOI: 10.1016/j.chemosphere.2017.10.043] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 09/30/2017] [Accepted: 10/07/2017] [Indexed: 06/07/2023]
Abstract
This paper proposes a combined ultrasound (US) and zero-valent iron/EDTA/Air (ZEA) system to remove polycyclic aromatic hydrocarbons (PAHs) from textile dyeing sludge. The removal efficiencies of 16 PAHs using ZEA, US/Air (air injected into the US process), and US/ZEA treatments were investigated, together with the effects of various operating parameters. The enhanced mechanisms of US and the role of reactive oxygen species (ROS) in removing PAHs in the US/ZEA system were explored. Results showed that only 42.5% and 32.9% of ∑16 PAHs were removed by ZEA and US/Air treatments respectively, whereas 70.1% were removed by US/ZEA treatment, (with favorable operating conditions of 2.0 mM EDTA, 15 g/L ZVI, and 1.08 w/cm3 ultrasonic density). The US/ZEA system could be used with a wide pH range. US led to synergistic improvement of PAHs removal in the ZEA system by enhancing sludge disintegration to release PAHs and promoting ZVI corrosion and oxygen activation. In the US/ZEA system, PAHs could be degraded by ROS (namely OH, O2-/HO2, and Fe(IV)) and adsorbed by ZVI, during which the ROS made the predominant contribution. This study provides important insights into the application of a US/ZEA system to remove PAHs from sludge.
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Affiliation(s)
- Xiaoyuan Man
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Xun-An Ning
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Haiyuan Zou
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Jieying Liang
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Jian Sun
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Xingwen Lu
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Jiekui Sun
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
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30
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Treatment of hazardous leachate from landfill using ultrasound/H2O2 system. MONATSHEFTE FUR CHEMIE 2017. [DOI: 10.1007/s00706-017-1919-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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31
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Yuan Y, Lai B, Yang P, Zhou Y. Treatment of ammunition wastewater by the combined Fe 0 /air and Fenton process (1 st Fe 0 /air-Fenton-2 nd Fe 0 /air). J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2016.05.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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32
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Lee YC, Chen MJ, Huang CP, Kuo J, Lo SL. Efficient sonochemical degradation of perfluorooctanoic acid using periodate. ULTRASONICS SONOCHEMISTRY 2016; 31:499-505. [PMID: 26964977 DOI: 10.1016/j.ultsonch.2016.01.030] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 12/10/2015] [Accepted: 01/27/2016] [Indexed: 05/28/2023]
Abstract
A rapid and efficient treatment method, using periodate (PI) for sonochemical oxidation of persistent and bioaccumulative perfluorooctanoic acid (PFOA) was developed. With an addition of 45 mM PI, 96.5% of PFOA was decomposed with a defluorination efficiency of 95.7% after 120 min of ultrasound (US). The removals of PFOA were augmented with an increase in PI doses. In all the PI+US experimental runs, decomposition efficiencies were essentially similar to those of defluorination, indicating that PFOA was decomposed and mineralized into fluoride ions. Lower solution pHs resulted in an increase in decomposition and defluorination efficiencies of PFOA due to acid-catalyzation. Dissolved oxygen increased the amount of IO4 radicals produced, which consumed the more effective IO3 radicals. Consequently, presence of oxygen inhibited the destruction of PFOA. The PFOA degradation rates with different gases sparging are in the following order: nitrogen>air>oxygen. Effects of anions follow the Hofmeister effects on PFOA degradation (i.e., Br(-)>none ⩾ Cl(-)>SO4(2)(-)). Br(-) could react with OH to yield radical anion Br2(-) that enhances the PFOA degradation. A reaction pathway was also proposed to describe the PI oxidation of PFOA under US irradiation.
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Affiliation(s)
- Yu-Chi Lee
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Road, Taipei 106, Taiwan, ROC
| | - Meng-Jia Chen
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Road, Taipei 106, Taiwan, ROC
| | - Chin-Pao Huang
- Department of Civil and Environmental Engineering, University of Delaware, Newark, DE 19716, USA
| | - Jeff Kuo
- Department of Civil and Environmental Engineering, California State University, 800 N. State College Blvd., Fullerton, USA
| | - Shang-Lien Lo
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Road, Taipei 106, Taiwan, ROC.
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33
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Xiong Z, Yuan Y, Lai B, Yang P, Zhou Y. Mineralization of ammunition wastewater by a micron-size Fe0/O3 process (mFe0/O3). RSC Adv 2016. [DOI: 10.1039/c6ra06135d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A micron-size Fe0/O3 process (mFe0/O3) was set up to mineralize the pollutants in ammunition wastewater, and its key operational parameters (e.g., initial pH, ozone flow rate, and mFe0 dosage) were optimized by the batch experiments, respectively.
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Affiliation(s)
- Zhaokun Xiong
- Department of Environmental Science and Engineering
- School of Architecture and Environment
- Sichuan University
- Chengdu 610065
- China
| | - Yue Yuan
- Department of Environmental Science and Engineering
- School of Architecture and Environment
- Sichuan University
- Chengdu 610065
- China
| | - Bo Lai
- Department of Environmental Science and Engineering
- School of Architecture and Environment
- Sichuan University
- Chengdu 610065
- China
| | - Ping Yang
- Department of Environmental Science and Engineering
- School of Architecture and Environment
- Sichuan University
- Chengdu 610065
- China
| | - Yuexi Zhou
- Research Center of Water Pollution Control Technology
- Chinese Research Academy of Environmental Sciences
- Beijing 100012
- China
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34
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Zha FG, Yao DX, Hu YB, Gao LM, Wang XM. Integration of US/Fe(2+) and photo-Fenton in sequencing for degradation of landfill leachate. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 73:260-266. [PMID: 26819380 DOI: 10.2166/wst.2015.487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The landfill leachate treated by sonication in presence of Fe(2+) (US/Fe(2+)) and then by photo-Fenton achieved the highest total organic carbon (TOC) removal efficiency among the screened processes. The lower initial pH, dosage of Fe(2+) and initial concentration of leachate were helpful in raising TOC removal efficiency of leachate by US/Fe(2+). The optimal conditions for the US-photo-Fenton process were as follows: initial pH at 3.0, [H2O2]/[TOC0] at 2, [H2O2]/[Fe(2+)] at 5 and initial concentration of landfill leachate at 600 mg/L. The removal efficiency of TOC, chemical oxygen demand (COD) and 5-day biochemical oxygen demand (BOD5) were 68.3, 79.6 and 58.2%, while the BOD5/COD rose from 0.20 to 0.43 at optimum condition. Based on gas chromatography-mass spectrometry (GC-MS) results, 36 of a total of 56 pollutants were completely degraded by US-photo-Fenton treatment.
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Affiliation(s)
- F G Zha
- School of Earth & Environment, Anhui University of Science & Technology, Huainan, Anhui 232001, China E-mail:
| | - D X Yao
- School of Earth & Environment, Anhui University of Science & Technology, Huainan, Anhui 232001, China E-mail:
| | - Y B Hu
- School of Earth & Environment, Anhui University of Science & Technology, Huainan, Anhui 232001, China E-mail:
| | - L M Gao
- School of Earth & Environment, Anhui University of Science & Technology, Huainan, Anhui 232001, China E-mail:
| | - X M Wang
- School of Earth & Environment, Anhui University of Science & Technology, Huainan, Anhui 232001, China E-mail:
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35
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Lai B, Chen Z, Fang S, Zhou Y. A Combined Treatment Approach Using Fe0/Air and Fenton’s Reagent for the Treatment of Delay Explosive Wastewater. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b01360] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bo Lai
- Department
of Environmental Science and Engineering, School of Architecture and
Environment, Sichuan University, Chengdu 610065, China
| | - Zhaoyu Chen
- Department
of Environmental Science and Engineering, School of Architecture and
Environment, Sichuan University, Chengdu 610065, China
| | - Shuping Fang
- Chengdu Tianfu New Area Construction Investment Co., Ltd., Chengdu 610094, China
| | - Yuexi Zhou
- Research
Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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36
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Removal of Yellow F3R, Di Maria Brilliant Blue R and Reactive Brilliant Red M-3BE from Aqueous Solutions by a Rapid and Efficient Ultrasound-Assisted Process with a Novel Biosorbent of Cottonseed Cake: Statistical Modeling, Kinetic and Thermodynamic Studies. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2015. [DOI: 10.1007/s13369-015-1751-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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37
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Xu N, Zeng Y, Li J, Zhang Y, Sun W. Removal of 17β-estrodial in a bio-electro-Fenton system: contribution of oxidation and generation of hydroxyl radicals with the Fenton reaction and carbon felt cathode. RSC Adv 2015. [DOI: 10.1039/c5ra08053c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A bio-electro-Fenton (BEF) system equipped with a Fe@Fe2O3/non-catalyzed carbon felt (NCF) cathode was optimized, and the generation of hydroxyl radicals was confirmed for E2 removal.
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Affiliation(s)
- Nan Xu
- Key Laboratory for Heavy Metal Pollution Control and Reutilization
- School of Environment and Energy
- Peking University Shenzhen Graduate School
- Shenzhen 518055
- China
| | - Yaqiong Zeng
- Key Laboratory for Heavy Metal Pollution Control and Reutilization
- School of Environment and Energy
- Peking University Shenzhen Graduate School
- Shenzhen 518055
- China
| | - Jie Li
- Key Laboratory for Heavy Metal Pollution Control and Reutilization
- School of Environment and Energy
- Peking University Shenzhen Graduate School
- Shenzhen 518055
- China
| | - Yingyuan Zhang
- Institute of New Energy
- State Key Laboratory of Heavy Oil Processing
- University of Petroleum
- Beijing 102249
- China
| | - Weiling Sun
- College of Environmental Sciences and Engineering
- Peking University
- The Key Laboratory of Water and Sediment Sciences
- Ministry of Education
- Beijing 100871
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38
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Wang C, Liu Z. Degradation of alachlor using an enhanced sono-Fenton process with efficient Fenton's reagent dosages. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2015; 50:504-513. [PMID: 25996814 DOI: 10.1080/03601234.2015.1018763] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this study, an enhanced sono-Fenton process for the degradation of alachlor is presented. At high ultrasonic power, low pH, and in the presence of adequate Fenton's reagent dosages, alachlor degradation can reach nearly 100%. The toxicity of treated alachlor wastewater, which was measured by changes in cell viability, slightly decreased after the Fenton or ultrasound/H2O2 process and significantly decreased after the enhanced sono-Fenton process. A satisfactory relationship was observed between the total organic carbon removal and cell viability increment, indicating that alachlor mineralization is a key step in reducing the toxicity of the solution. The formation of alachlor degradation byproducts was observed during the oxidation process, in which the first step was the substitution of a chloride by a hydroxyl group. In conclusion, the enhanced sono-Fenton process was effective in the degradation and detoxification of alachlor within a short reaction time. Thus, the treated wastewater can then be passed through a biological treatment unit for further treatment.
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Affiliation(s)
- Chikang Wang
- a Department of Environmental Engineering and Health , Yuanpei University of Medical Technology , Hsinchu , Taiwan
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39
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Haddou N, Ghezzar MR, Abdelmalek F, Ognier S, Martel M, Addou A. Plasmacatalytic removal of lead acetate assisted by precipitation. CHEMOSPHERE 2014; 107:304-310. [PMID: 24462087 DOI: 10.1016/j.chemosphere.2013.12.071] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 12/16/2013] [Accepted: 12/28/2013] [Indexed: 06/03/2023]
Abstract
The Gliding Arc Discharge (GAD) is an efficient non-thermal plasma technique able to degrade organic compounds dispersed in water at atmospheric pressure. The degradation of the organometallic lead acetate (PbAc) in aqueous solution was performed by two distinct plasmageneous processes: GAD and GAD/TiO2. The global oxidation of the organic matter was followed by Chemical Oxygen Demand (COD) and the mineralization was determined by the Total Organic Carbon (TOC). The Pb(2+) ions released during the degradation process were measured by Atomic Absorption Spectroscopy (AAS). For 2h of GAD treatment, the degradation rate of PbAc (10mM) reached 83% and for the same duration of GAD/TiO2 process ([TiO2]=1gL(-1)), it reached 93%. The release of Pb(2+) ions in the solution was respectively of 95% and 57% for GAD and GAD/TiO2 processes. The released Pb(2+) ions were removed by precipitation process in a basic medium at pH=11.1. A reaction mechanism was proposed to explain the PbAc molecule degradation and the Pb(2+) elimination.
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Affiliation(s)
- Nabila Haddou
- Laboratoire des Sciences et Techniques de l'Environnement et de la Valorisation, Faculté des Sciences et de la technologie, Université de Mostaganem, Algeria
| | - Mouffok Redouane Ghezzar
- Laboratoire des Sciences et Techniques de l'Environnement et de la Valorisation, Faculté des Sciences et de la technologie, Université de Mostaganem, Algeria; Laboratoire de Génie des Procédés Plasma et traitement de surface, UPMC Université de Paris 06, 11 rue Pierre et Marie Curie 75005, France.
| | - Fatiha Abdelmalek
- Laboratoire des Sciences et Techniques de l'Environnement et de la Valorisation, Faculté des Sciences et de la technologie, Université de Mostaganem, Algeria
| | - Stéphanie Ognier
- Laboratoire de Génie des Procédés Plasma et traitement de surface, UPMC Université de Paris 06, 11 rue Pierre et Marie Curie 75005, France
| | | | - Ahmed Addou
- Laboratoire des Sciences et Techniques de l'Environnement et de la Valorisation, Faculté des Sciences et de la technologie, Université de Mostaganem, Algeria
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40
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Wang C, Liu C. Decontamination of alachlor herbicide wastewater by a continuous dosing mode ultrasound/Fe(2+)/H2O2 process. J Environ Sci (China) 2014; 26:1332-1339. [PMID: 25079845 DOI: 10.1016/s1001-0742(13)60608-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We used a ultrasound/Fe(2+)/H2O2 process in continuous dosing mode to degrade the alachlor. Experimental results indicated that lower pH levels enhanced the degradation and mineralization of alachlor. The maximum alachlor degradation (initial alachlor concentration of 50 mg/L) was as high as 100% at pH 3 with ultrasound of 100 Watts, 20 mg/L of Fe(2+), 2 mg/min of H2O2 and 20°C within 60 min reaction combined with 46.8% total organic carbon removal. Higher reaction temperatures inhibited the degradation of alachlor. Adequate dosages of Fe(2+) and H2O2 in ultrasound/Fe(2+)/H2O2 process not only enhance the degradation efficiency of alachlor but also save the operational cost than the sole ultrasound or Fenton process. A continuous dosing mode ultrasound/Fe(2+)/H2O2 process was proven as an effective method to degrade the alachlor.
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Affiliation(s)
- Chikang Wang
- Department of Environmental Engineering and Health, Yuanpei University, Hsinchu, Taiwan, Chinese Taipei.
| | - Chunghan Liu
- Department of Environmental Engineering and Health, Yuanpei University, Hsinchu, Taiwan, Chinese Taipei
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