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Yang ZW, Wang WL, Lee MY, Wu QY, Guan YT. Synergistic effects of ozone/peroxymonosulfate for isothiazolinone biocides degradation: Kinetics, synergistic performance and influencing factors. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 294:118626. [PMID: 34864102 DOI: 10.1016/j.envpol.2021.118626] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 11/14/2021] [Accepted: 12/01/2021] [Indexed: 06/13/2023]
Abstract
Synergistic effects of ozone (O3) and peroxymonosulfate (PMS, HSO5-) for isothiazolinone biocides degradation was studied. The synergistic ozonation process (O3/PMS) increased the efficiency of methyl-isothiazolinone (MIT) and chloro-methyl-isothiazolinone (CMIT) degradation to 91.0% and 81.8%, respectively, within 90 s at pH 7.0. This is 30.6% and 62.5% higher than the corresponding ozonation efficiency, respectively. Total radical formation value (Rct,R) for the O3/PMS process was 24.6 times that of ozonation alone. Calculated second-order rate constants for the reactions between isothiazolinone biocides and (kSO4-,MIT and kSO4-,CMIT) were 8.15 × 109 and 4.49 × 109 M-1 s-1, respectively. Relative contributions of O3, hydroxyl radical (OH) and oxidation to MIT and CMIT removal were estimated, which were 15%, 45%, and 40% for O3, OH and oxidation to MIT, and 1%, 67%, and 32% for O3, OH and oxidation to CMIT at pH 7.0, respectively. Factors influencing the O3/PMS process, namely the solution pH, chloride ions (Cl-), and bicarbonate (HCO3-), were evaluated. Increasing the solution pH markedly accelerated O3 decay and OH and formation, thus weakening the relative contribution of O3 oxidation while enhancing that of OH and . Cl- had a negligible effect on MIT and CMIT degradation. Under the dual effect of bicarbonate (HCO3-) as inhibitor and promoter, low concentrations (1-2 mM) of bicarbonate weakly promoted MIT and CMIT degradation, while high concentrations (10-20 mM) induced strong inhibition. Lastly, oxidation performance of O3 and O3/PMS processes for MIT and CMIT degradation in different water matrices was compared.
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Affiliation(s)
- Zheng-Wei Yang
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Wen-Long Wang
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Min-Yong Lee
- Department of Environmental Resources Research, National Institute of Environmental Research, Seogu, Incheon, 22689, Republic of Korea
| | - Qian-Yuan Wu
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Yun-Tao Guan
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
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Ershov BG, Shilov BP. Reactions of ozone and intermediate products of its decomposition with actinides, lanthanides and transition metals in aqueous solutions. RADIOCHIM ACTA 2021. [DOI: 10.1515/ract-2021-1007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The properties and stability of ozone in aqueous solutions of various compositions in the рН range of 0–14 were considered. The effect of anions and cations, which are involved in the redox reactions of actinides, on the stability of ozone and its reactivity has been studied. The reactions of О3 with ions of d- and f-elements were analyzed. Depending on the solution composition and рН value, the reaction can occur directly with the O3 molecule (direct mechanism) and/or with short-lived ion-radical products (•OH,
HO
2
•
/
O
2
−
•
${\text{HO}}_{2}^{{\bullet}}/{\text{O}}_{2}^{-{\bullet}}$
, H2O2/
HO
2
−
${\text{HO}}_{2}^{-}$
,
O
3
−
•
${\text{O}}_{3}^{-{\bullet}}$
) formed upon ozone decomposition in water (indirect mechanism). Ions with inert coordination sphere react with О3 in the outer-sphere fashion with electron transfer. Polyvalent ions with labile coordination spheres are oxidized in acidic medium via О atom transfer, possibly, with intermediate peroxy addition (H2O2, HNO4, H2SO5, etc.). In alkaline medium, О3 is converted to the
O
3
−
•
${\text{O}}_{3}^{-{\bullet}}$
radical ion, which is the key oxidant for actinides. The results of studies and the mechanisms of reactions of ozone and its intermediates decomposition products with U, Np, Pu, and Am in various oxidation states and with some transition metals (Fe, Mn, Ag, Co, etc.) in aqueous solutions are presented and discussed.
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Affiliation(s)
- Boris G. Ershov
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences , Leninsky Pr. 31 – 4, 119071 , Moscow , Russia
| | - Bladimir P. Shilov
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences , Leninsky Pr. 31 – 4, 119071 , Moscow , Russia
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Assessment of an MnCe-GAC Treatment Process for Tetramethylammonium-Contaminated Wastewater from Optoelectronic Industries. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9214578] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Nitrogen-containing wastewater is an important issue in optoelectronic and semiconductor industries. Wastewater containing nitrogen compounds such as ammonium, monoethanolamine (MEA), and tetramethylammonium hydroxide (TMAH) must be properly treated due to concerns about health and environmental effects. MnCe-GAC (granular activated carbon) processes were developed in this study for the treatment of TMAH-contaminated wastewater in high-tech industries. The MnCe-GAC processes could effectively remove ammonium, MEA, and TMAH from aqueous solutions. The removal efficiencies of ammonium and MEA by these processes were better than observed for TMAH. Parameters affecting TMAH removal such as type of process, type of wastewater (synthetic or real), pH, salts, and t-butanol were investigated. In general, removal efficiencies of TMAH by various processes were in the following order: MnCe-GAC/O3/H2O2 > MnCe-GAC/O3 > MnCe-GAC/H2O2 > MnCe-GAC > GAC. The negative effect of sulfate and nitrate on pollutant removal might be due to the salting-out effect. Based on t-butanol experiments, the main degradation mechanisms of TMAH by the MnCe-GAC/O3/H2O2 process likely involved hydroxyl radicals. The process proposed in this study could be an effective alternative method for the treatment of high-tech industrial wastewater to meet the new TMAH discharge limit.
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Levanov AV, Isaikina OY, Gasanova RB, Lunin VV. Solubility of Ozone and Kinetics of Its Decomposition in Aqueous Chloride Solutions. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b03371] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexander V. Levanov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskiye Gory 1, Building 3, 119991 Moscow, Russia
| | - Oksana Ya. Isaikina
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskiye Gory 1, Building 3, 119991 Moscow, Russia
| | - Ramiya B. Gasanova
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskiye Gory 1, Building 3, 119991 Moscow, Russia
| | - Valery V. Lunin
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskiye Gory 1, Building 3, 119991 Moscow, Russia
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Butkovskyi A, Bruning H, Kools SA, Rijnaarts HH, Van Wezel AP. Organic Pollutants in Shale Gas Flowback and Produced Waters: Identification, Potential Ecological Impact, and Implications for Treatment Strategies. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:4740-4754. [PMID: 28376616 PMCID: PMC5415876 DOI: 10.1021/acs.est.6b05640] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 03/27/2017] [Accepted: 04/05/2017] [Indexed: 05/20/2023]
Abstract
Organic contaminants in shale gas flowback and produced water (FPW) are traditionally expressed as total organic carbon (TOC) or chemical oxygen demand (COD), though these parameters do not provide information on the toxicity and environmental fate of individual components. This review addresses identification of individual organic contaminants in FPW, and stresses the gaps in the knowledge on FPW composition that exist so far. Furthermore, the risk quotient approach was applied to predict the toxicity of the quantified organic compounds for fresh water organisms in recipient surface waters. This resulted in an identification of a number of FPW related organic compounds that are potentially harmful namely those compounds originating from shale formations (e.g., polycyclic aromatic hydrocarbons, phthalates), fracturing fluids (e.g., quaternary ammonium biocides, 2-butoxyethanol) and downhole transformations of organic compounds (e.g., carbon disulfide, halogenated organic compounds). Removal of these compounds by FPW treatment processes is reviewed and potential and efficient abatement strategies are defined.
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Affiliation(s)
- Andrii Butkovskyi
- Department
of Environmental Technology, Wageningen
University, P.O. Box 17, 6700 AA Wageningen, The Netherlands
- Phone: +31 317 483997; e-mail:
| | - Harry Bruning
- Department
of Environmental Technology, Wageningen
University, P.O. Box 17, 6700 AA Wageningen, The Netherlands
| | - Stefan A.E. Kools
- KWR
Watercycle Research Institute, P.O. Box 1072, 3430 BB Nieuwegein, The Netherlands
| | - Huub H.M. Rijnaarts
- Department
of Environmental Technology, Wageningen
University, P.O. Box 17, 6700 AA Wageningen, The Netherlands
| | - Annemarie P. Van Wezel
- KWR
Watercycle Research Institute, P.O. Box 1072, 3430 BB Nieuwegein, The Netherlands
- Copernicus
Institute of Sustainable Development, Utrecht
University, P.O. Box 80.115, 3508 TC Utrecht, The Netherlands
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Li HY, Qu JH, Liu HJ. Removal of a type of endocrine disruptors--di-n-butyl phthalate from water by ozonation. J Environ Sci (China) 2006; 18:845-51. [PMID: 17278736 DOI: 10.1016/s1001-0742(06)60003-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Ozonation of synthetic water containing a type of endocrine disruptor--di-n-butyl phthalate (DBP) was examined. Key impact factors such as pH, temperature, ionic strength, ozone dosage and initial DBP concentration were investigated. In addition, the activities of radicals on uncatalysed and catalysed ozonation were studied. The degradation intermediate products were followed and the kinetic of the ozonation were assessed as well. Results revealed that ozonation of DBP followed two mechanisms. Firstly, the reaction rate of direct ozonation was slower at lower pH, temperature, and ionic strength. Secondly, when these factors were increased for indirect radical reaction, higher percentage of DBP was removed with the increase of the initial ozone dosage and the decrease of the initial DBP concentration. In addition, tert-butanol, humic substances and Fe(II) affected DBP ozonation through the radical pathway. It was determined that ozonation was restrained by adding tert-butanol for its radical inhibition effect. Furthermore, humic substances enhanced the reaction to some extent, but a slight negative effect would be encountered if the optimum dosage was exceeded. As a matter of fact, Mn(II) affected the ozonation by "active sites" mechanism. In the experiment, three different kinds of intermediate products were produced during ozonation, but the amount of products for each one of them decreased as pH, temperature, ionic strength and initial ozone dosage increased. A kinetic equation of the reaction between ozone and DBP was obtained.
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Affiliation(s)
- Hai-yan Li
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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