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Liao S, Saleeba Z, Bryant JD, Abriola LM, Pennell KD. Influence of aqueous film forming foams on the solubility and mobilization of non-aqueous phase liquid contaminants in quartz sands. WATER RESEARCH 2021; 195:116975. [PMID: 33677241 DOI: 10.1016/j.watres.2021.116975] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 02/17/2021] [Accepted: 02/22/2021] [Indexed: 06/12/2023]
Abstract
At sites where aqueous film forming foams (AFFFs) are used for fire suppression or training activities, interactions between dissolved foam constituents and organic liquids could alter contaminant migration in the subsurface. In this study, batch reactor and column experiments were conducted to investigate the potential for AFFF solutions to enhance the solubility and mobility of three representative non-aqueous phase liquid (NAPLs), JP-4 jet fuel, trichloroethene (TCE), and tetrachloroethene (PCE). For AFFF concentrations up to 5% wt. (50,000 mg/L), aqueous solubilities of TCE and PCE increased by less than 50%, indicating the absence of micellar solubilization. However, NAPL-water interfacial tensions were reduced to less than 1.5 mN/m and resulted in accumulation of up to 2.25 mg/m2 of AFFF at the NAPL-water interface. To assess the potential for AFFF to mobilize residual (entrapped) NAPL at a field application rate of 3% wt. (30,000 mg/L), columns were packed with two size fractions of Ottawa sands (20-30 mesh and 60-80 mesh) that yielded residual NAPL saturations ranging from 11.7 to 17.6%. Following injection of 3 pore volumes of the 3% wt. AFFF solution, partial mobilization of residual NAPL was observed for PCE, TCE, and JP-4, with saturation reductions of 0.7 to 2% in 20-30 mesh and 0.3% to 1.3% in 60-80 mesh Ottawa sand. The columns were then flushed with an ultralow-IFT surfactant solution consisting of 4% wt. 1:1 Aerosol AY/OT, which resulted in nearly complete mobilization of the remaining residual NAPL. When NAPL desaturation curves were expressed in terms of the total trapping number (NT), the threshold value of NT required for NAPL mobilization by 3% wt. AFFF was approximately 2 × 10-5, consistent with previous studies. These findings demonstrate that AFFF solutions can lead to partial mobilization of residual NAPL, and that the total trapping number concept can be used to predict such behavior a priori. In addition, the observed IFT reductions are sufficient to alter NAPL accumulation and redistribution behavior in the subsurface through enhanced spreading above the water table (e.g., JP-4) or penetration into lower-permeability media (e.g., TCE, PCE).
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Affiliation(s)
- Shuchi Liao
- School of Engineering, Brown University, Providence, RI 02912, United States
| | - Zachary Saleeba
- School of Engineering, Brown University, Providence, RI 02912, United States
| | - J Daniel Bryant
- Woodard & Curran, East Windsor, New Jersey 08520, United States
| | - Linda M Abriola
- School of Engineering, Brown University, Providence, RI 02912, United States
| | - Kurt D Pennell
- School of Engineering, Brown University, Providence, RI 02912, United States.
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Sathisaran I, Devidas Bhatia D, Vishvanath Dalvi S. New curcumin-trimesic acid cocrystal and anti-invasion activity of curcumin multicomponent solids against 3D tumor models. Int J Pharm 2020; 587:119667. [PMID: 32702448 DOI: 10.1016/j.ijpharm.2020.119667] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 06/28/2020] [Accepted: 07/15/2020] [Indexed: 12/25/2022]
Abstract
Curcumin (CUR) is a Biopharmaceutics Classification System (BCS) class IV drug with poor aqueous solubility and low permeability. The dissolution of CUR can be enhanced through the cocrystallization approach. In this work, we report a new cocrystal phase of CUR with trimesic acid (TMA) with the enhanced dissolution of CUR. Cytotoxicity and cell invasion assays were conducted on (2D) monolayers and three-dimensional (3D) tumor models of triple-negative breast cancer (TNBC) cells, MDA-MB-231 using the new CUR-TMA cocrystal phase along with different CUR solid forms prepared in our previous works. The cytotoxicity and internalization assays conducted on 2D monolayers indicated that all CUR multicomponent solid forms except Curcumin-Folic Acid Dihydrate (CUR-FAD) (1:1) coamorphous solid exhibited enhanced bioavailability than unprocessed CUR. Cell invasion assay conducted on 3D tumor spheroid models showed that Curcumin-Hydroxyquinol (CUR-HXQ) cocrystal completely inhibited cell invasion whereas CUR-FAD (1:1) coamorphous solid induced enhanced invasion of cells from spheroid models.
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Affiliation(s)
- Indumathi Sathisaran
- Biological Engineering, Indian Institute of Technology Gandhinagar, Palaj, Gujarat 382355, India
| | - Dhiraj Devidas Bhatia
- Biological Engineering, Indian Institute of Technology Gandhinagar, Palaj, Gujarat 382355, India
| | - Sameer Vishvanath Dalvi
- Chemical Engineering, Indian Institute of Technology Gandhinagar, Palaj, Gujarat 382355, India.
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3
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Heynderickx PM. Dynamic headspace analysis using online measurements: Modeling of average and initial concentration. Talanta 2019; 198:573-584. [PMID: 30876601 DOI: 10.1016/j.talanta.2019.02.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/06/2019] [Accepted: 02/07/2019] [Indexed: 11/28/2022]
Abstract
Dynamic headspace sampling is an important technique for the analysis of consumer products, the study of biological samples and environmental water analyses. This paper shows the influence of experimental conditions, such as the sampling time, sampling flow rate, headspace volume, liquid volume and Henry coefficient on the measured average concentration values. A corresponding closed expression as function of these variables is introduced in order to quantify the deviation of the initial headspace concentration. The proposed bi-exponential function embeds different current existing models for recovery calculation in dynamic sampling analyses in one single expression. A fully automated and user-friendly Excel® file to investigate or to model the dynamic headspace sampling results is added to everyone's easy use.
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Affiliation(s)
- Philippe M Heynderickx
- Center for Environmental and Energy Research (CEER) - Engineering of Materials via Catalysis and Characterization, Ghent University Global Campus, 119 Songdomunhwa-Ro, Yeonsu-Gu, Incheon 406-840, South Korea; Department of Green Chemistry and Technology (BW24), Faculty of Bioscience Engineering, Ghent University, 653 Coupure Links, Ghent B-9000, Belgium.
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Kwon TS, Lee JY, Yang JS, Baek K. One-dimensional column and three-dimensional box flushing of silicone emulsion-enhanced remediation for chlorinated solvent contaminated soils. KOREAN J CHEM ENG 2016. [DOI: 10.1007/s11814-016-0301-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ayral-Cinar D, Otero-Diaz M, Demond AH. A mechanism of basal spacing reduction in sodium smectitic clay materials in contact with DNAPL wastes. CHEMOSPHERE 2016; 159:577-583. [PMID: 27343864 DOI: 10.1016/j.chemosphere.2016.05.079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 05/17/2016] [Accepted: 05/28/2016] [Indexed: 06/06/2023]
Abstract
There has been concern regarding the possible attack of clays in aquitards, slurry walls and landfill liners by dense nonaqueous phase liquid (DNAPL) wastes, resulting in cracking. Despite the fact that a reduction in basal spacing in sodium smectitic clay materials has been linked to cracking, no plausible mechanism by which this reduction occurs in contact with waste DNAPLs has been formulated. To elucidate a mechanism, screening studies were conducted that showed that the combination of an anionic surfactant (AOT), a nonionic surfactant (TritonX-100) and a chlorinated solvent, tetrachloroethylene (PCE), could replicate the basal spacing reduction and cracking behavior of water-saturated bentonite caused by two waste DNAPLs obtained from the field. FTIR measurements of this system showed a displacement of the HOH bending band of water symptomatic of desiccation. Sorption measurements showed that the uptake of AOT by bentonite increased eight fold in the presence of TritonX-100 and PCE. The evidence presented here supports a mechanism of syneresis, involving the extraction of water from the interlayer space of the clay through the synergistic sorption of a nonionic and anionic surfactant mixture. It is speculated that the solvation of water in reverse micellar aggregates is the process driving the syneresis.
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Affiliation(s)
- Derya Ayral-Cinar
- Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI 48109-2125, USA
| | - Margarita Otero-Diaz
- Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI 48109-2125, USA
| | - Avery H Demond
- Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI 48109-2125, USA.
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Tang E, Du K, Feng X, Yuan M, Liu S, Zhao D. Controlled synthesis of cellulose-graft-poly[2-(diethylamino)-ethyl methacrylate] by ATRP in ionic liquid [AMIM]Cl and its pH-responsive property. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.01.041] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Cyclodextrin, an efficient tool for trans-anethole encapsulation: Chromatographic, spectroscopic, thermal and structural studies. Food Chem 2014; 164:454-61. [DOI: 10.1016/j.foodchem.2014.05.052] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Revised: 03/20/2014] [Accepted: 05/07/2014] [Indexed: 11/21/2022]
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Nørgaard AW, Hansen JS, Sørli JB, Levin M, Wolkoff P, Nielsen GD, Larsen ST. Pulmonary Toxicity of Perfluorinated Silane-Based Nanofilm Spray Products: Solvent Dependency. Toxicol Sci 2013; 137:179-88. [DOI: 10.1093/toxsci/kft225] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Damrongsiri S, Tongcumpou C, Sabatini DA. Partition behavior of surfactants, butanol, and salt during application of density-modified displacement of dense non-aqueous phase liquids. JOURNAL OF HAZARDOUS MATERIALS 2013; 248-249:261-267. [PMID: 23385206 DOI: 10.1016/j.jhazmat.2012.12.059] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 12/17/2012] [Accepted: 12/18/2012] [Indexed: 06/01/2023]
Abstract
Density-modified displacement (DMD) is a recent approach for removal of trapped dense NAPL (DNAPL). In this study, butanol and surfactant are contacted with the DNAPL to both reduce the density as well as release the trapped DNAPL (perchloroethylene: PCE). The objective of the study was to determine the distribution of each component (e.g., butanol, surfactant, water, PCE) between the original aqueous and PCE phases during the application of DMD. The results indicated that the presence of the surfactant increased the amount of n-butanol required to make the NAPL phase reach its desired density. In addition, water and anionic surfactant were found to partition along with the BuOH into the PCE phase. The water also found partitioned to reverse micelles in the modified phase. Addition of salt was seen to increase partitioning of surfactant to BuOH containing PCE phase. Subsequently, a large amount of water was solubilized into reverse micelles which lead to significantly increase in volume of the PCE phase. This work thus demonstrates the role of each component and the implications for the operation design of an aquifer treatment using the DMD technique.
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Affiliation(s)
- S Damrongsiri
- Center of Excellence on Hazardous Substance Management (HSM), Chulalongkorn University, Phaya-Thai Rd., Bangkok, Thailand
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Ciobanu A, Ruellan S, Mallard I, Landy D, Gennequin C, Siffert S, Fourmentin S. Cyclodextrin-intercalated layered double hydroxides for fragrance release. J INCL PHENOM MACRO 2012. [DOI: 10.1007/s10847-012-0227-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Inclusion interactions of cyclodextrins and crosslinked cyclodextrin polymers with linalool and camphor in Lavandula angustifolia essential oil. Carbohydr Polym 2012. [DOI: 10.1016/j.carbpol.2011.10.005] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Gao H, Blanford WJ, Birdwell JE. The pseudophase approach to assessing chemical partitioning in air-water-cyclodextrin systems. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2009; 43:2943-2949. [PMID: 19475975 DOI: 10.1021/es803382z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Henry's Law constants (HLCs) of several common, subsurface hydrophobic organic pollutants (HOPs) including trichloroethylene (TCE), perchloroethylene (PCE) and benzene, toluene, ethylbenzene, and o-xylene (BTEX), were measured using a static headspace phase ratio (SHPR) method over a range of temperatures (35, 45, 55, and 65 degrees C) and experimentally and operationally relevant cyclodextrin (CD) concentrations (0, 10, 20, 50, and 100 g L(-1)). In aqueous CD solutions, HLC values decrease according to a power law relationship with increasing CD concentration due to an apparent solubility enhancement caused by HOP partitioning to the hydrophobic cavity of CD molecules. The temperature dependence of air-water partitioning under the influence of CD was well described by the van't Hoff equation for all HOPs tested. A three-phase equilibrium model was used to interpret air-water-CD partitioning data, treating CD as a pseudophase. Our results show that HOP CD-water partition coefficients decrease linearly with increasing temperature. CD-water partition coefficients were generally independent of CD concentration, with a few exceptions. Comparison of our results for hydroxypropyl-beta-CD and TCE to those from another study showed several major discrepancies, which were attributed to differences in the experimental methods employed. Our attempt to correlate CD-water partition coefficients with HOP chemical properties indicates that correlations based on individual chemical descriptors (e.g., aqueous solubility, octanol-water partition coefficient, molecular volume or ET (30) polarity index) will not be sufficient to obtain accurate estimates of HOP CD-water partition coefficients for other compounds with differing chemical structures.
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Affiliation(s)
- Heng Gao
- Department of Civil and Environmental Engineering, 3418 Patrick F. Taylor Hall, Louisiana State University, Baton Rouge, Louisiana 70803, USA
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Decock G, Landy D, Surpateanu G, Fourmentin S. Study of the retention of aroma components by cyclodextrins by static headspace gas chromatography. J INCL PHENOM MACRO 2008. [DOI: 10.1007/s10847-008-9471-z] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Zhai X, Hua I, Rao PSC, Lee LS. Cosolvent-enhanced chemical oxidation of perchloroethylene by potassium permanganate. JOURNAL OF CONTAMINANT HYDROLOGY 2006; 82:61-74. [PMID: 16229923 DOI: 10.1016/j.jconhyd.2005.08.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2004] [Revised: 07/06/2005] [Accepted: 08/23/2005] [Indexed: 05/04/2023]
Abstract
A laboratory study was conducted to examine cosolvent-enhanced in-situ chemical oxidation (ISCO) of perchloroethylene (PCE) using potassium permanganate (KMnO4). The conceptual basis for this new technique is to enhance permanganate oxidation of dense non-aqueous phase liquids (DNAPLs) with the addition of a cosolvent, thereby increasing DNAPL solubility while avoiding mobilization. Among 17 cosolvent candidates screened, tertiary butyl alcohol (TBA) and acetone were the most stable in the presence of KMnO4, both of which increased PCE aqueous solubility significantly, and therefore are suitable to be used as cosolvent in this study. Batch experiments indicated that the second-order rate constant for PCE oxidation by potassium permanganate was 0.043+/-0.002 M(-1) s(-1) in the purely aqueous (no cosolvent) solution. In the presence of 20% cosolvent (volume fraction=fc=0.2), the rate constant decreased to 0.036+/-0.003 M(-1) s(-1) with TBA and to 0.031+/-0.002 M(-1) s(-1) with acetone. However, in the presence of free-phase PCE, chloride ion concentration from PCE oxidation in acetone/water solutions (fc=0.2) was about twice that in aqueous solutions, indicating that the increase in PCE solubility more than compensated for the decrease in reaction rate constant, such that the oxidation efficiency of PCE was increased with cosolvent. A complete chlorine mass balance was observed in the aqueous system, whereas approximately 70% was obtained in TBA/water or acetone/water (fc=0.2). In soil columns containing residual DNAPL and subjected to isocratic flushing with step-wise increases in f(c) cosolvent, TBA at fc=0.2 resulted in PCE mobilization, whereas acetone at fc<or=0.5 did not. Therefore, although both TBA and acetone exhibit similar solubility enhancements, acetone may be a better solvent choice for use in in-situ remediation of DNAPL source zones.
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Affiliation(s)
- Xihong Zhai
- School of Civil Engineering, 550 Stadium Mall Drive, Purdue University, West Lafayette, IN 47907, USA
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Enhancement of the catalytic hydrodechlorination of tetrachloroethylene in methanol at mild conditions by water addition. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.03.178] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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