1
|
Liu P, Wu Z, Fang Z, Cravotto G. Sonolytic degradation kinetics and mechanisms of antibiotics in water and cow milk. ULTRASONICS SONOCHEMISTRY 2023; 99:106518. [PMID: 37572426 PMCID: PMC10433014 DOI: 10.1016/j.ultsonch.2023.106518] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 06/30/2023] [Accepted: 07/05/2023] [Indexed: 08/14/2023]
Abstract
Antibiotics (ABX) residues frequently occurred in water and cow milk. This work aims to understand the kinetics and mechanisms of sonolytic degradation of four ABX, i.e. ceftiofur hydrochloride (CEF), sulfamonomethoxine sodium (SMM), marbofloxacin (MAR), and oxytetracycline (OTC) in water and milk. In both water and milk, the sonolytic degradation of ABX follows pseudo-first order (PFO) kinetics well (R2: 0.951-0.999), with significantly faster ABX degradation in water (PFO kinetics constants (k1): 1.5 × 10-3-1.2 × 10-1 min-1) than in milk (k1: 3.5 × 10-4-5.6 × 10-2 min-1). The k1 values for SMM degradation in water increased by 118% with ultrasonic frequency (40-120 kHz), 174% with ultrasonic frequency (80-500 kHz), 649% with ultrasonic power (73-259 W), 22% with bulk temperature (12-40℃), and by 68% with reaction volume (50-250 mL), respectively, in other things being equal. The relevant k1 values in milk increased by 326%, 231%, 122%, 10% as well as 82% with the above same effective factors, respectively. The oxidation by free radicals generated in situ dominates ABX degradation, and the hydrophobic CEF (54.0-971.7 nM min-1) and SMM (39.2-798.4 nM min-1) underwent faster degradation than the hydrophilic MAR (33.9-751.9 nM min-1) and OTC (33.8-545.3 nM min-1) in both water and milk. Adding an extra 0.5 mM H2O2 accelerated SMM degradation by 19% in water and 33% in milk. After 130-150 min sonication of 100 mL of 2.0 mg L-1 (6.62 μM) SMM in various milk with 500 kHz and 259 W, the residue concentrations (52.9-96.3 μg L-1) can meet the relevant maximum residue limit (100 μg L-1).
Collapse
Affiliation(s)
- Pengyun Liu
- Department of Drug Science and Technology, University of Turin, via P. Giuria 9, 10125 Turin, Italy
| | - Zhilin Wu
- College of Chemistry and Chemical Engineering of Shantou University, and Chemistry and Chemical Engineering Guangdong Laboratory, 515063 Shantou, China.
| | - Zhen Fang
- Biomass Group, College of Engineering, Nanjing Agricultural University, 40 Dianjiangtai Road, Nanjing 210031, China
| | - Giancarlo Cravotto
- Department of Drug Science and Technology, University of Turin, via P. Giuria 9, 10125 Turin, Italy.
| |
Collapse
|
2
|
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.
Collapse
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
| |
Collapse
|
3
|
Catalytic Photodegradation of Cyclic Sulfur Compounds in a Model Fuel Using a Bench-scale Falling-film Reactor Irradiated by a Visible Light. BULLETIN OF CHEMICAL REACTION ENGINEERING & CATALYSIS 2022. [DOI: 10.9767/bcrec.17.4.15838.755-767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A homemade N doped-TiO2 nanoparticle were used to degrade dibenzothiophene (DBT) in a model fuel flowing on a bench-scale glass-made falling film reactor irradiated by a xenon lamp that emitted visible light. The photocatalyst was immobilized on the glass sheet. EDS, SEM, and FT-IR techniques were utilized to identify the morphology of the N doped-TiO2 nanoparticles. Different operating parameters (e.g., N loading (0, 4, 5, and 6 wt%), light intensity (20, 40, and 60 W/m2), and pH (4, 7, and 10)) were investigated for their effect on the DBT degradation. The effect of the N loading on the wettability of the nano-TiO2 particles was also investigated. Experimental results revealed that the N loading did not affect the wettability characteristics of the nano TiO2 particles. Moreover, results showed that DBT conversion positively depends on N loading, light intensity (hv), and pH increase. The estimated optimal operating parameters were 5 wt% N loading, pH = 10, and hv = 40 W/m2 to ensure the best photo-oxidation efficiency of 91.4% after 120 min of operation. The outcomes of the present work confirmed the effective efficiency of the N-doped TiO2 nanoparticles irradiated by visible light for DBT degradation. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Collapse
|
4
|
Desai K, Dharaskar S, Pandya J, Shinde S, Gupta T. Trihexyl tetradecyl phosphonium bromide as an effective catalyst/extractant in ultrasound-assisted extractive/oxidative desulfurization. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:49770-49783. [PMID: 35220534 DOI: 10.1007/s11356-022-19310-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 02/15/2022] [Indexed: 06/14/2023]
Abstract
Phosphonium-based ionic liquid (PIL) has been used as a catalyst and extractant. Here, the PIL, trihexyl tetradecyl phosphonium bromide ([THTDP]Br) was utilized for the S-removal of model oil (MO) and acted as the reaction-induced self-separation catalyst. The influence of oxidant to sulfur molar ratio (n(O/S)), mass ratio of model oil to ionic liquid (m(MO/IL)), sonication time, and temperature was observed to investigate the optimal conditions for the ultrasound-assisted extractive/oxidative desulfurization (UEODS) catalyzed by [THTDP]Br. A kinetic study was performed, and the reaction rate constant and half-life were calculated as the oxidation reaction was following pseudo-first-order reaction kinetics. Moreover, the oxidation reactivity and selectivity of various sulfur substrates were in the following order: DBT > BT > TH > 3-MT. The DBT removal with various initial S-content was observed to be constant, which makes it feasible for practical application. The interaction energy between [THTDP]Br and S-compounds was examined using Density Functional Theory. The sulfur removal of base oil (BO) was also examined using various desulfurization systems at DBT optimized conditions. The highest desulfurization efficiency of BO was obtained during the UEODS process, which made it industrially feasible. [THTDP]Br was regenerated and recycled six times with a slight variation in efficiency.
Collapse
Affiliation(s)
- Komal Desai
- Department of Chemical Engineering, School of Technology, Pandit Deendayal Energy University, Raisan, Gandhinagar, 382426, Gujarat, India
| | - Swapnil Dharaskar
- Department of Chemical Engineering, School of Technology, Pandit Deendayal Energy University, Raisan, Gandhinagar, 382426, Gujarat, India.
| | - Jalaja Pandya
- Department of Physics, School of Technology, Pandit Deendayal Energy University, Raisan, Gandhinagar, 382426, Gujarat, India
| | - Satyam Shinde
- Department of Physics, School of Technology, Pandit Deendayal Energy University, Raisan, Gandhinagar, 382426, Gujarat, India
| | | |
Collapse
|
5
|
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: 2] [Impact Index Per Article: 0.7] [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.
Collapse
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.
| |
Collapse
|
6
|
de Andrade FV, Augusti R, de Lima GM. Ultrasound for the remediation of contaminated waters with persistent organic pollutants: A short review. ULTRASONICS SONOCHEMISTRY 2021; 78:105719. [PMID: 34450413 PMCID: PMC8387924 DOI: 10.1016/j.ultsonch.2021.105719] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 08/10/2021] [Accepted: 08/11/2021] [Indexed: 05/14/2023]
Abstract
The rising amount of persistent organic contaminants released into water reservoirs in the last years became a cause of concern for the industry, academy, and public administration, due to their bioaccumulation, mutagenicity, and photosynthesis reduction. Therefore, the search for processes that efficiently remove such contaminants became of primary importance. In this context, ultrasound (US) is one of the most promising and economically viable alternatives to degrade organic pollutants in varied environments. Whereas the use of other advanced oxidation processes (AOPs), such as Fenton and photocatalysis, has been widely reported for this purpose, only a few papers deal with ultrasound application as a possible AOP. In this review, a general overview of ultrasound is provided, covering the last twenty years. It includes fundamental aspects of ultrasound and applications, individually or combined with other AOPs, to deplete organic pollutants from various classes in an aqueous environment. Finally, the review concludes by indicating that additional research should be conducted worldwide to explore the full potential of ultrasound as a useful AOP.
Collapse
Affiliation(s)
- F V de Andrade
- Universidade Federal de Itajubá - Campus Itabira, Advanced Ceramic Materials Laboratory - LCAv, Research Group in Materials and Nanoscience - GPMN, Rua Irmã Ivone Drumond, 200 - Distrito Industrial II, 35903-087 Itabira, MG, Brazil.
| | - R Augusti
- Universidade Federal de Minas Gerais, Department of Chemistry, Av. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte MG, Brazil
| | - G M de Lima
- Universidade Federal de Minas Gerais, Department of Chemistry, Av. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte MG, Brazil
| |
Collapse
|
7
|
Al-Zaydi KM, Petrier C, Mousally SMM, Arab ST, Refat MS. Sonochemical Degradation of Benzothiophene (BT) in Deionized Water, Natural Water and Sea Water. Molecules 2019; 24:E257. [PMID: 30641947 PMCID: PMC6359156 DOI: 10.3390/molecules24020257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 12/29/2018] [Accepted: 01/02/2019] [Indexed: 11/24/2022] Open
Abstract
This paper deals with the sonochemical water treatment of polycyclic aromatic sulfur hydrocarbons (PASHs), one of the most common impurities found in waste water coming from petroleum industry. The best fit of the experimental data appears to be the kinetic parameters determined using the Michaelis-Mentonmodel in the concentrations range of the study. For the initial increase in the degradation rates, it is simply considered that the more the bulk concentration increases, the more the concentration in the interfacial region increases. This will be explained by Michaelis-Menton kinetics. The influence of organic compounds in the water matrix as a mixture with Benzothiophene (BT) was also evaluated. The results indicated that BT degradation is unaffected by the presence of bisphenol A (BPA). Finally, the results indicated that ultrasonic action is involved in oxidation rather than pyrolitic processing in the BT sonochemical degradation.
Collapse
Affiliation(s)
- Khadijah M Al-Zaydi
- Department of Chemistry, Sciences Faculty -AL Faisaliah, King Abdulaziz University, Jeddah, P.O. Box 50918, Jeddah 21533, Saudi Arabia.
- Chemistry Department, Faculty of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia.
| | - Christian Petrier
- Department of Chemistry, Sciences Faculty -AL Faisaliah, King Abdulaziz University, Jeddah, P.O. Box 50918, Jeddah 21533, Saudi Arabia.
- Rheology and processes Laboratory UMR 5520- UJF-Grenoble INP-CNR, Laboratoire Rhéologie et Procédés, Domaine Universitaire, 38041 Grenoble, France.
| | - Sameera M M Mousally
- Department of Chemistry, Sciences Faculty -AL Faisaliah, King Abdulaziz University, Jeddah, P.O. Box 50918, Jeddah 21533, Saudi Arabia.
- Chemistry Department, Faculty of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia.
| | - Sana T Arab
- Department of Chemistry, Sciences Faculty -AL Faisaliah, King Abdulaziz University, Jeddah, P.O. Box 50918, Jeddah 21533, Saudi Arabia.
- Chemistry Department, Faculty of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia.
| | - Moamen S Refat
- Chemistry Department, Faculty of Science, Taif University, P.O. Box 888, Al-Hawiah, Taif 21974, Saudi Arabia.
- Department of Chemistry, Faculty of Science, Port Said, Port Said University, Port Said 42526, Egypt.
| |
Collapse
|
8
|
Gole VL, Sierra-Alvarez R, Peng H, Giesy JP, Deymier P, Keswani M. Sono-chemical treatment of per- and poly-fluoroalkyl compounds in aqueous film-forming foams by use of a large-scale multi-transducer dual-frequency based acoustic reactor. ULTRASONICS SONOCHEMISTRY 2018; 45:213-222. [PMID: 29705315 DOI: 10.1016/j.ultsonch.2018.02.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Revised: 01/07/2018] [Accepted: 02/06/2018] [Indexed: 05/27/2023]
Abstract
Aqueous film-forming foams (AFFFs) contain a mixture of organic chemicals, including per- and poly-fluorinated, alkyl sulfonate substances (PFAS) (1-5%, w/w). Some longer-chain PFAS can be toxic, moderately bioaccumulative and persistent in the environment. In the present work, decomposition of PFAS present in two commercially available AFFFs (ANSUL- and 3M-) was investigated using a sono-chemical reactor of volume 91 L. The reactor consists of 12 transducers with operating frequencies of 1 MHz or 500 kHz and total input power of 12 kW. Degradation of PFASs performed using various dilutions of AFFF revealed that release of F- and SO4-2 ions was inversely proportional to initial pH of up to 4. Defluorination of ANSUL-AFFF resulted in an increase in the concentration of F- released from 55.6 ± 0.3 µM (500× dilution) to 58.6 ± 0.6 (25× dilution), while for 3M AFFF it increased from 19.9 ± 0.7 µM (500× dilution) to 217.1 ± 2.4 µM (25× dilution). Though amounts of F- released were less for ANSUL-AFFF than for 3M-AFFF, there was a considerable increase in removal of TOC and release of SO4-2 present in ANSUL-AFFF. Approximately 90.5% and 26.6% reduction of perfluoroalkyl sulfonates (PFSA) and perfluoroalkyl carboxylates (PFCA) in 3M, respectively, and 38.4% reduction of fluorotelomer sulfonates in ANSUL-AFFF were achieved in 13 h. Estimated costs of energy for the treatment of ANSUL-AFFF and 3M-AFFF at a 500× dilution were $0.015 ± 0.0001/L and $0.019 ± 0.0002/L, respectively.
Collapse
Affiliation(s)
- Vitthal L Gole
- Department of Materials Science and Engineering, The University of Arizona, P.O. Box 210012, Tucson, AZ, USA
| | - Reyes Sierra-Alvarez
- Department of Chemical and Environmental Engineering, The University of Arizona, P.O. Box 210011, Tucson, AZ, USA
| | - Hui Peng
- Department of Biomedical Sciences and Toxicology Center, University of Saskatchewan, 44 Campus Drive, Saskatoon, SK S7N 5B3, Canada
| | - John P Giesy
- Department of Biomedical Sciences and Toxicology Center, University of Saskatchewan, 44 Campus Drive, Saskatoon, SK S7N 5B3, Canada
| | - Pierre Deymier
- Department of Materials Science and Engineering, The University of Arizona, P.O. Box 210012, Tucson, AZ, USA
| | - Manish Keswani
- Department of Materials Science and Engineering, The University of Arizona, P.O. Box 210012, Tucson, AZ, USA.
| |
Collapse
|
9
|
Yang XY, Wei H, Li KB, He Q, Xie JC, Zhang JT. Iodine-enhanced ultrasound degradation of sulfamethazine in water. ULTRASONICS SONOCHEMISTRY 2018; 42:759-767. [PMID: 29429728 DOI: 10.1016/j.ultsonch.2017.12.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 12/12/2017] [Accepted: 12/22/2017] [Indexed: 06/08/2023]
Abstract
This study investigated sulfamethazine (SMT) ultrasound degradation, enhanced by iodine radicals, generated by potassium iodide (KI) and hydrogen peroxide (H2O2) in situ. The results showed that the ultrasound/H2O2/KI (US/H2O2/KI) combination treatment achieved an 85.10 ± 0.45% SMT removal (%) in 60 min under the following conditions: pH = 3.2, ultrasound power of 195 W, initial SMT concentration of 0.04 mmol·L-1, H2O2 concentration of 120 mmol·L-1, and KI concentration of 2.4 mmol·L-1. UV-Vis spectrophotometric monitoring of molecular iodine (I2) and triiodide (I3-) revealed a correlation between the SMT degradation and the iodine change in the solution. Quenching experiments using methanol, t-butanol and thiamazole as radical scavengers indicated that iodine radicals, such as I and I2-, were more important than hydroxyl radicals (HO) for SMT degradation. SMT degradation under the US/H2O2/KI treatment followed pseudo-first order reaction kinetics. The activation energy (Ea) of SMT degradation was 7.75 ± 0.61 kJ·mol-1, which suggested the reaction was controlled by the diffusion step. Moreover, TOC removal was monitored, and the obtained results revealed that it was not as effective as SMT degradation under the US/H2O2/KI system.
Collapse
Affiliation(s)
- Xiao-Yu Yang
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, China
| | - Hong Wei
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, China.
| | - Ke-Bin Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, Ministry of Education, School of Chemistry and Material Science, Northwest University, Xi'an, China
| | - Qiang He
- Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, TN, USA
| | - Jian-Cang Xie
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, China
| | - Jia-Tong Zhang
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, China
| |
Collapse
|
10
|
Al-Hamadani YA, Jung C, Im JK, Boateng LK, Flora JR, Jang M, Heo J, Park CM, Yoon Y. Sonocatalytic degradation coupled with single-walled carbon nanotubes for removal of ibuprofen and sulfamethoxazole. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2017.01.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
11
|
Dai F, Fan X, Stratton GR, Bellona CL, Holsen TM, Crimmins BS, Xia X, Mededovic Thagard S. Experimental and density functional theoretical study of the effects of Fenton's reaction on the degradation of Bisphenol A in a high voltage plasma reactor. JOURNAL OF HAZARDOUS MATERIALS 2016; 308:419-429. [PMID: 26874105 DOI: 10.1016/j.jhazmat.2016.01.068] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 01/07/2016] [Accepted: 01/26/2016] [Indexed: 06/05/2023]
Abstract
A novel electrical discharge plasma reactor configuration with and without iron ions was evaluated for the degradation of 0.02 mM Bisphenol A (BPA). The pseudo-first-order reaction rate constant calculated for the plasma treatment of BPA with a stainless steel electrode in the presence of dissolved ferrous ion (Fe(2+)) salts (termed plasma/Fenton treatment) was higher than in the plasma treatment in the absence of iron salts. At the optimal ferrous ion concentration, longer plasma treatment times resulted in higher BPA degradation rates, likely due to increased hydroxyl (OH) radical concentration formed through the decomposition of H2O2. Replacing the stainless steel with a carbon steel grounded electrode resulted in the release of iron ions from the carbon steel thereby increasing the rate of BPA removal and eliminating the need for iron salts. After the plasma/Fenton treatment, >97% of the residual iron salts were removed by coagulation/flocculation/sedimentation. Byproduct identification coupled with density functional theory (DFT) calculations confirmed that OH radical attack on BPA's hydroxyl group is the primary pathway for byproduct formation.
Collapse
Affiliation(s)
- Fei Dai
- Department of Civil and Environmental Engineering, 8 Clarkson Avenue, Clarkson University, Potsdam, 13699 NY, USA.
| | - Xiangru Fan
- Department of Chemical and Biomolecular Engineering, 8 Clarkson Avenue, Clarkson University, Potsdam, 13699 NY, USA.
| | - Gunnar R Stratton
- Department of Chemical and Biomolecular Engineering, 8 Clarkson Avenue, Clarkson University, Potsdam, 13699 NY, USA.
| | - Christopher L Bellona
- Department of Civil and Environmental Engineering, 8 Clarkson Avenue, Clarkson University, Potsdam, 13699 NY, USA; Department of Civil and Environmental Engineering, 1500 Illinois St., Colorado School of Mines, Golden, 80401 CO, USA.
| | - Thomas M Holsen
- Department of Civil and Environmental Engineering, 8 Clarkson Avenue, Clarkson University, Potsdam, 13699 NY, USA.
| | - Bernard S Crimmins
- Department of Civil and Environmental Engineering, 8 Clarkson Avenue, Clarkson University, Potsdam, 13699 NY, USA.
| | - Xiaoyan Xia
- Department of Civil and Environmental Engineering, 8 Clarkson Avenue, Clarkson University, Potsdam, 13699 NY, USA.
| | - Selma Mededovic Thagard
- Department of Chemical and Biomolecular Engineering, 8 Clarkson Avenue, Clarkson University, Potsdam, 13699 NY, USA.
| |
Collapse
|
12
|
Application of a quantitative structure retention relationship approach for the prediction of the two-dimensional gas chromatography retention times of polycyclic aromatic sulfur heterocycle compounds. J Chromatogr A 2016; 1437:191-202. [DOI: 10.1016/j.chroma.2016.02.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 01/28/2016] [Accepted: 02/01/2016] [Indexed: 10/22/2022]
|
13
|
Rahmani H, Gholami M, Mahvi AH, Ali-Mohammadi M, Rahmani K. Tinidazol antibiotic degradation in aqueous solution by zero valent iron nanoparticles and hydrogen peroxide in the presence of ultrasound radiation. J WATER CHEM TECHNO+ 2015. [DOI: 10.3103/s1063455x14060101] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
|
14
|
Rubio-Clemente A, Torres-Palma RA, Peñuela GA. Removal of polycyclic aromatic hydrocarbons in aqueous environment by chemical treatments: a review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 478:201-225. [PMID: 24552655 DOI: 10.1016/j.scitotenv.2013.12.126] [Citation(s) in RCA: 149] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 12/30/2013] [Accepted: 12/30/2013] [Indexed: 06/03/2023]
Abstract
Due to their carcinogenic, mutagenic and teratogenic potential, the removal of polycyclic aromatic hydrocarbons (PAHs) from aqueous environment using physical, biological and chemical processes has been studied by several researchers. This paper reviews the current state of knowledge concerning PAHs including their physico-chemical properties, input sources, occurrence, adverse effects and conventional and alternative chemical processes applied for their removal from water. The mechanisms and reactions involved in each treatment method are reported, and the effects of various variables on the PAH degradation rate as well as the extent of degradation are also discussed. Extensive literature analysis has shown that an effective way to perform the conversion and mineralization of this type of substances is the application of advanced oxidation processes (AOPs). Furthermore, combined processes, particularly AOPs coupled with biological treatments, seem to be one of the best solutions for the treatment of effluents containing PAHs.
Collapse
Affiliation(s)
- Ainhoa Rubio-Clemente
- Grupo de Diagnóstico y Control de la Contaminación - GDCON, Facultad de Ingeniería, Sede de Investigaciones Universitarias (SIU), Universidad de Antioquia UdeA, Calle 70, No. 52-21, Medellín, Colombia
| | - Ricardo A Torres-Palma
- Grupo de Investigación en Remediación Ambiental y Biocatálisis, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70, No. 52-21, Medellín, Colombia.
| | - Gustavo A Peñuela
- Grupo de Diagnóstico y Control de la Contaminación - GDCON, Facultad de Ingeniería, Sede de Investigaciones Universitarias (SIU), Universidad de Antioquia UdeA, Calle 70, No. 52-21, Medellín, Colombia
| |
Collapse
|
15
|
Enhanced ultrasonic degradation of acetaminophen and naproxen in the presence of powdered activated carbon and biochar adsorbents. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2013.12.021] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
16
|
Dailianis S, Tsarpali V, Melas K, Karapanagioti HK, Manariotis ID. Aqueous phenanthrene toxicity after high-frequency ultrasound degradation. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2014; 147:32-40. [PMID: 24373890 DOI: 10.1016/j.aquatox.2013.12.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 11/22/2013] [Accepted: 12/08/2013] [Indexed: 06/03/2023]
Abstract
Given that polycyclic aromatic hydrocarbons (PAHs), such as phenanthrene (PH), possess a potent risk for aquatic biota, a great attempt to develop and apply advanced oxidation processes, such as ultrasound (US), is of great concern nowadays. However, because US PAH-derived toxic intermediates are difficult to detect, the present study investigates aqueous PH toxicity before and after high-frequency US degradation, in hemocytes of mussel Mytilus galloprovincialis. Specifically, cell viability (with the use of neutral red uptake/NRU method), and oxidative-stress indices in terms of superoxide anions, (O2(-)), nitric oxides (NO, in terms of nitrites), lipid peroxidation products (in terms of malondialdehyde/MDA content) and DNA damage (with the use of Comet assay method) were investigated in mussel hemocytes exposed to environmentally relevant concentrations of PH (0.01, 0.1, 1 and 10 μg L(-1)), before and after US treatment for 120 min (at a frequency of 582 kHz). According to the results, the NRU method showed a significant attenuation of PH-induced mortality in US PH-treated hemocytes in all cases. Moreover, the increased levels of O2(-) and NO generation, as well as MDA content measured in PH-treated hemocytes, were drastically decreased after US degradation in any case. Similarly, the disturbance of DNA integrity (in terms of % DNA in tail, OM and TM), was negligible in case of US PH-treated hemocytes. Although further in vitro and in vivo studies are needed, the present study showed for the first time that high frequency US could be applied as a highly efficient and "environmentally friendly" process for degrading low molecular weight PAH, such as PH.
Collapse
Affiliation(s)
- Stefanos Dailianis
- Section of Animal Biology, Department of Biology, Faculty of Sciences, University of Patras, 26500, Greece.
| | - Vasiliki Tsarpali
- Section of Animal Biology, Department of Biology, Faculty of Sciences, University of Patras, 26500, Greece
| | - Konstantinos Melas
- Section of Animal Biology, Department of Biology, Faculty of Sciences, University of Patras, 26500, Greece
| | | | - Ioannis D Manariotis
- Environmental Engineering Laboratory, Department of Civil Engineering, University of Patras, 26504, Greece
| |
Collapse
|
17
|
Li Y, Hsieh WP, Mahmudov R, Wei X, Huang CP. Combined ultrasound and Fenton (US-Fenton) process for the treatment of ammunition wastewater. JOURNAL OF HAZARDOUS MATERIALS 2013; 244-245:403-411. [PMID: 23274940 DOI: 10.1016/j.jhazmat.2012.11.022] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2012] [Revised: 11/06/2012] [Accepted: 11/07/2012] [Indexed: 06/01/2023]
Abstract
A wastewater collected from a regional ammunition process site was treated with combined US-Fenton process. Factors such as pH, temperature, reaction time, US energy intensity, initial TOC concentration, and the molar ratio of iron to hydrogen peroxide that might affect the treatment efficiency were investigated. The removal of TOC, COD, and color increased with decreasing pH and increasing temperature and US intensity. Color was removed rapidly reaching 85% in 10 min; whereas TOC and COD were removed slowly, only about 20% for both in 10 min and approaching 65 and 92% removal in 120 min, respectively. The optimal molar ratio of Fe(II) to H(2)O(2) for TOC and COD removal was 500. The results showed that the change in the average carbon oxidation number (ACON) was parallel to that of the removal efficiency of TOC, COD, and color. The toxicity of treated wastewater was reduced as assessed by the respiration rate of Escherichia coli.
Collapse
Affiliation(s)
- Yangang Li
- College of Water Resources and Architecture Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | | | | | | | | |
Collapse
|
18
|
Samokhvalov A. Desulfurization of Real and Model Liquid Fuels Using Light: Photocatalysis and Photochemistry. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2012. [DOI: 10.1080/01614940.2012.650958] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
19
|
Pang YL, Abdullah AZ. Comparative study on the process behavior and reaction kinetics in sonocatalytic degradation of organic dyes by powder and nanotubes TiO2. ULTRASONICS SONOCHEMISTRY 2012; 19:642-651. [PMID: 22000097 DOI: 10.1016/j.ultsonch.2011.09.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Revised: 09/05/2011] [Accepted: 09/21/2011] [Indexed: 05/27/2023]
Abstract
Sonocatalytic degradation of various organic dyes (Congo Red, Reactive Blue 4, Methyl Orange, Rhodamine B and Methylene Blue) catalyzed by powder and nanotubes TiO(2) was studied. Both catalysts were characterized using transmission electron microscope (TEM), surface analyzer, Raman spectroscope and thermal gravimetric analyzer (TGA). Sonocatalytic activity of powder and nanotubes TiO(2) was elucidated based on the degradation of various organic dyes. The former catalyst was favorable for treatment of anionic dyes, while the latter was more beneficial for cationic dyes. Sonocatalytic activity of TiO(2) nanotubes could be up to four times as compared to TiO(2) powder under an ultrasonic power of 100 W and a frequency of 42 kHz. This was associated with the higher surface area and the electrostatic attraction between dye molecules and TiO(2) nanotubes. Fourier transform-infrared spectrometer (FT-IR) was used to identify changes that occurred on the functional group in Rhodamine B molecules and TiO(2) nanotubes after the reaction. Sonocatalytic degradation of Rhodamine B by TiO(2) nanotubes apparently followed the Langmuir-Hinshelwood adsorption kinetic model with surface reaction rate of 1.75 mg/L min. TiO(2) nanotubes were proven for their high potential to be applied in sonocatalytic degradation of organic dyes.
Collapse
Affiliation(s)
- Yean Ling Pang
- School of Chemical Engineering, Universiti Sains Malaysia, Nibong Tebal, 14300 Penang, Malaysia
| | | |
Collapse
|
20
|
De Bel E, Janssen C, De Smet S, Van Langenhove H, Dewulf J. Sonolysis of ciprofloxacin in aqueous solution: influence of operational parameters. ULTRASONICS SONOCHEMISTRY 2011; 18:184-189. [PMID: 20627656 DOI: 10.1016/j.ultsonch.2010.05.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2010] [Revised: 05/07/2010] [Accepted: 05/10/2010] [Indexed: 05/29/2023]
Abstract
Ultrasonic irradiation is a promising technique for the degradation of persistent organic molecules such as pharmaceuticals in wastewater. This paper focuses on the sonolytic degradation of ciprofloxacin (CIP), a fluoroquinolone antibiotic. During a first experiment at 25°C and 544 kHz, the degradation of a 15 mg L(-1) CIP-solution showed a pseudo-first order degradation constant k(1) equal to 0.0067 ± 0.0001 min(-1) (n=3). Experiments with the addition of t-butanol as a radical scavenger showed that reaction with *OH radicals is the main degradation route for ciprofloxacin. Since the production of *OH radicals was the highest at 544 kHz, this was also the most favorable frequency for CIP degradation in comparison with 801 (k(1)=0.0055 min(-1)) and 1081 kHz (k(1)=0.0018 min(-1)). The degradation constant is also strongly dependent on the temperature of the bulk solution. The degradation constant increased significantly with increasing temperature from 0.0055 min(-1) at 15°C to 0.0105 min(-1) at 45°C. According to the Arrhenius law, the apparent activation energy was determined to be 17.5 kJ mol(-1). This suggests that the degradation of CIP is diffusion controlled, as is the case for most radical reactions. A Langmuir-type heterogeneous reaction kinetics model could be used to explain the increasing degradation constant with decreasing initial CIP concentration from 0.0204 min(-1) (C(0)=0.15 mg L(-1)) to 0.0009 min(-1) (C(0)=150 mg L(-1)). According to the model a local reaction zone exists at the interface region of the cavitation bubbles. During bubble oscillation, molecules accumulate in the reaction zone and when the bubble finally collapses, the molecules in the reaction zone can be oxidized by the formed *OH radicals. This means that degradation is limited by the available surface at the interface. The model agreed very well with the experimental data (R(2)=0.975). The pseudo rate constant for decomposition (k(d)) was estimated to be 0.40 μM min(-1) and the modeled equilibrium constant (K) was equal to 0.047 μM(-1).
Collapse
Affiliation(s)
- Evelien De Bel
- Research Group EnVOC, Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | | | | | | | | |
Collapse
|
21
|
Sponza DT, Oztekin R. Destruction of some more and less hydrophobic PAHs and their toxicities in a petrochemical industry wastewater with sonication in Turkey. BIORESOURCE TECHNOLOGY 2010; 101:8639-8648. [PMID: 20663666 DOI: 10.1016/j.biortech.2010.06.124] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Revised: 06/27/2010] [Accepted: 06/28/2010] [Indexed: 05/29/2023]
Abstract
The effects of increasing sonication time (60-150min), NaCl (2-18g/l), S(2)O(8)(2-) (2-10mg/l) and 1-butanol (200-600mg/l) concentrations on the destructions of seven polycyclic aromatic hydrocarbons (PAHs) and acute toxicity in a petrochemical industry wastewater in Izmir (Turkey) were investigated. The yields in more hydrophobic PAHs (DahA and BghiP) were as high as in less hydrophobic PAHs (CHR, PHE, PY, BbF and ANT) at 60 degrees C after 150min sonication. The removals in all PAHs increased from 72-78% to 97-99% as the NaCl administration was increased from 1.5 to 12g/l. The degradation efficiency of seven PAHs was enhanced by 36% with 6mg/l S(2)O(8)(2-) after 150min. OH(*) is the major process for complete sonodegradation of less hydrophobic PAHs while pyrolysis is the major process for complete degradation of more hydrophobic PAHs.
Collapse
Affiliation(s)
- Delia Teresa Sponza
- Department of Environmental Engineering, Dokuz Eylül University, Tinaztepe Campus, Buca, Izmir, Turkey.
| | | |
Collapse
|
22
|
Wu CH, Yu CH. Effects of TiO2 dosage, pH and temperature on decolorization of C.I. Reactive Red 2 in a UV/US/TiO2 system. JOURNAL OF HAZARDOUS MATERIALS 2009; 169:1179-1183. [PMID: 19450925 DOI: 10.1016/j.jhazmat.2009.04.064] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Revised: 04/15/2009] [Accepted: 04/15/2009] [Indexed: 05/27/2023]
Abstract
This study elucidates the decolorization of C.I. Reactive Red 2 (RR2) in ultrasound (US), US/TiO(2), ultraviolet (UV)/TiO(2) and UV/US/TiO(2) systems. The effects of TiO(2) dosage, pH and temperature on RR2 decolorization were determined in a UV/US/TiO(2) system. The pseudo-first-order decolorization rate constants of 0.5, 1 and 2g/l TiO(2) in the UV/US/TiO(2) system were 0.45, 0.57 and 0.94 h(-1), respectively. In the UV/US/TiO(2) system, the decolorization rate of RR2 declines as pH increases, and increases as temperature increasing. At pH 7, the decolorization rates followed the order of UV/US/TiO(2) (0.94 h(-1))>UV/TiO(2) (0.85h(-1))>US/TiO(2) (0.25 h(-1))>US. The activation energy of the UV/US/TiO(2) system at pHs of 4, 7 and 10 was 6.58, 11.62 and 21.32kJ/mol, respectively. Experimental results suggest that the RR2 decolorization in the UV/US/TiO(2) system was a diffusion-controlled reaction.
Collapse
Affiliation(s)
- Chung-Hsin Wu
- Department of Environmental Engineering, Da-Yeh University, 168, University Road, Dacun, Changhua, Taiwan, ROC.
| | | |
Collapse
|
23
|
Behnajady MA, Modirshahla N, Shokri M, Vahid B. Effect of operational parameters on degradation of Malachite Green by ultrasonic irradiation. ULTRASONICS SONOCHEMISTRY 2008; 15:1009-14. [PMID: 18442946 DOI: 10.1016/j.ultsonch.2008.03.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2007] [Revised: 03/13/2008] [Accepted: 03/17/2008] [Indexed: 05/03/2023]
Abstract
The aim of the present study was to apply ultrasonic technique to remove Malachite Oxalate Green (MG) from aqueous solution. An ultrasonic bath with frequency of 35 kHz was used to investigate the effect of different operational parameters such as MG concentration, power density, temperature, mechanical agitation and addition of EtOH, 2-PrOH and iso-BuOH. Decolorization of MG follows a first order kinetics and hydroxyl radicals have an important role in degradation of MG. The apparent reaction rate constant (k(ap)) was influenced by variation of operational parameters. The activation energy was 30.95 kJ/mol in temperature range of 21-34 degrees C, suggesting a diffusion-controlled reaction. Alcohols act as hydroxyl radicals scavengers having undesirable contribution. UV-vis spectral change of MG showed hypsochromic shift occurred with increasing sonication time, proposing N-demethylation process of MG.
Collapse
Affiliation(s)
- Mohammad A Behnajady
- Department of Applied Chemistry, Islamic Azad University, Tabriz Branch, P.O. Box 1655, Tabriz, IR, Iran.
| | | | | | | |
Collapse
|
24
|
Juárez‐Guerra FM, Luis Rivera J, Zúñiga‐Moreno A, Galicia‐Luna LA, Luis Rico J, Lara J. Molecular Modeling of Thiophene in the Vapor–Liquid Equilibrium. SEP SCI TECHNOL 2007. [DOI: 10.1080/01496390500446129] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Francisco M. Juárez‐Guerra
- a Facultad de Ingeniería Química , Universidad Michoacana de San Nicolás de Hidalgo , Morelia , Michoacán , México
| | - José Luis Rivera
- a Facultad de Ingeniería Química , Universidad Michoacana de San Nicolás de Hidalgo , Morelia , Michoacán , México
| | - Abel Zúñiga‐Moreno
- b Instituto Politécnico Nacional, ESIQIE‐Graduados, Lab. de Termodinámica , México
| | - Luis A. Galicia‐Luna
- b Instituto Politécnico Nacional, ESIQIE‐Graduados, Lab. de Termodinámica , México
| | - José Luis Rico
- a Facultad de Ingeniería Química , Universidad Michoacana de San Nicolás de Hidalgo , Morelia , Michoacán , México
| | - Javier Lara
- a Facultad de Ingeniería Química , Universidad Michoacana de San Nicolás de Hidalgo , Morelia , Michoacán , México
| |
Collapse
|
25
|
Findik S, Gündüz G. Sonolytic degradation of acetic acid in aqueous solutions. ULTRASONICS SONOCHEMISTRY 2007; 14:157-62. [PMID: 16750650 DOI: 10.1016/j.ultsonch.2006.03.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2005] [Accepted: 03/27/2006] [Indexed: 05/10/2023]
Abstract
In this work, ultrasonic degradation of acetic acid, which is one of the most resistant carboxylic acids to oxidize, was investigated. The effects of parameters such as ultrasonic power, initial concentration, addition of NaCl or several oxides were studied on the degradation of acetic acid. Acetic acid was sonicated indirectly using an ultrasonic bath with 40 kHz. It was observed that degradation degree increased with decreasing power and initial concentration and with increasing NaCl concentration. Initial degradation degree was enhanced with addition of zeolite and SiO(2).
Collapse
Affiliation(s)
- S Findik
- Ege University, Faculty of Engineering, Department of Chemical Engineering, 35100 Bornova, Izmir, Turkey
| | | |
Collapse
|
26
|
Dükkanci M, Gündüz G. Ultrasonic degradation of oxalic acid in aqueous solutions. ULTRASONICS SONOCHEMISTRY 2006; 13:517-22. [PMID: 16352455 DOI: 10.1016/j.ultsonch.2005.10.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2005] [Accepted: 10/15/2005] [Indexed: 05/05/2023]
Abstract
This paper describes the ultrasonic degradation of oxalic acid. The effects of ultrasonic power, H(2)O(2), NaCl, external gases on the degradation of oxalic acid were investigated. Reactor flask containing oxalic acid was immersed in the ultrasonic bath with water as the coupling fluid. Representative samples withdrawn were analysed by volumetric titration. Degradation degree of oxalic acid increased with increasing ultrasonic power. It was observed that H(2)O(2) has negative contribution on the degradation of oxalic acid and there was an optimum concentration of NaCl for enhancing the degradation degree of oxalic acid. Although bubbling nitrogen gave higher degradation than that for bubbling air, both gases (for 20 min before sonication and during sonication together) could not help to enhance the degradation of oxalic acid when compared with the degradation without gas passage.
Collapse
Affiliation(s)
- M Dükkanci
- Faculty of Engineering, Chemical Engineering Department, Ege University, Bornova/Izmir, Turkey
| | | |
Collapse
|
27
|
|
28
|
Shemer H, Narkis N. Effect of various reaction parameters on THMs aqueous sonolysis. CHEMOSPHERE 2005; 59:1317-21. [PMID: 15857643 DOI: 10.1016/j.chemosphere.2004.11.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2003] [Revised: 11/17/2004] [Accepted: 11/17/2004] [Indexed: 05/02/2023]
Abstract
Ultrasonic irradiation was investigated for destruction of the following THMs: CHCl(3), CHBrCl(2), CHBr(2)Cl, CHBr(3), and CHI(3). The effect of pH, temperature, and the organics initial concentration on the THMs sonodegradation at acoustic frequency of 20 kHz was studied. An increase of the solution temperature resulted in a faster sonodegradation rates. Initial aqueous solution pH, in the range from 3 to 10, was found to have little effect on the degradation of the THMs. The THMs sonolysis efficiency was reduced when the initial organic compounds concentration was increased from 10 mg l(-1) to 300 mg l(-1).
Collapse
Affiliation(s)
- Hilla Shemer
- Environmental and Water Resources Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel.
| | | |
Collapse
|
29
|
Svitelska GV, Gallios GP, Zouboulis AI. Sonochemical decomposition of natural polyphenolic compound (condensed tannin). CHEMOSPHERE 2004; 56:981-7. [PMID: 15268965 DOI: 10.1016/j.chemosphere.2004.05.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2003] [Revised: 05/17/2004] [Accepted: 05/19/2004] [Indexed: 05/11/2023]
Abstract
Sonochemical treatment of grape condensed tannin was studied with the aim to destroy phenolic constituents, using ultrasonic frequency of 20 kHz in the presence and in the absence of hydrogen peroxide (H2O2), as an oxidative agent. Various pH, H2O2 concentration and temperature combinations were used in order to investigate the role of these parameters in the studied process. In order to estimate the effect of ultrasound, similar experiments were conducted in terms of pH, H2O2 concentration and temperature conditions, but without sonication. In all cases the presence of H2O2 was resulted in considerably higher removal of total phenolics (TP). It was observed that pH and temperature present also a significant effect on TP removal in the presence of H2O2, both with and without sonication. Under similar experimental conditions higher reaction rates, concerning TP removal, were obtained in the presence of ultrasonic irradiation, than in its absence.
Collapse
Affiliation(s)
- G V Svitelska
- Chemical Technology Division, Department of Chemistry, Aristotle University of Thessaloniki (Box 116), 541 24 Thessaloniki, Greece
| | | | | |
Collapse
|
30
|
d'Alessandro N, Tonucci L, Bonetti M, Di Deo M, Bressan M, Morvillo A. Oxidation of dibenzothiophene by hydrogen peroxide or monopersulfate and metal–sulfophthalocyanine catalysts: an easy access to biphenylsultone or 2-(2′-hydroxybiphenyl)sulfonate under mild conditions. NEW J CHEM 2003. [DOI: 10.1039/b212152b] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|