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Labrecque SP, Blanford WJ. Fate and transport of bromide and mononuclear aromatic hydrocarbons in aqueous solutions through Berea Sandstone. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 766:141714. [PMID: 33172637 DOI: 10.1016/j.scitotenv.2020.141714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 08/13/2020] [Accepted: 08/13/2020] [Indexed: 06/11/2023]
Abstract
A series of miscible displacement tests were performed on a 51 mm wide by 76 mm long well-laminated core of Berea Sandstone to determine the transport parameters of the anion bromide and a homologous series of seventeen mononuclear aromatic hydrocarbons (MAHs). In each test, a continuous input pulse of a single tracer was passed through the cylindrical core housed in a hydrostatic core holder at a confining pressure of 200 bar. The effluent concentration, as measured by in-line UV absorbance, versus time resulted in smooth high-resolution sinusoidal breakthrough curves (BTCs). In comparison to the near Gaussian BTCs of bromide, the transport of the MAHs was differentially retarded with minimal levels of delayed transport along the more rapid flow lines, but with progressively more along the slower flow paths. These results show that despite a lack of significant hydraulic heterogeneity, there is a high degree of heterogeneity among the sorption sites. The BTCs were aptly modeled with a one-dimensional flow model consisting of a mixture of instantaneous equilibrium and rate-limited reversible sorption sites. The relative fraction of instantaneous sites increased proportionately with the rate the subject MAH passed through the core. Potential quantitative structure-retention relationships (QSRR) between common chemical parameters of the MAHs and their overall retardation factors, sorption coefficients and the fraction of instantaneous equilibrium were evaluated. Among the compounds examined, relatively strong correlations were found with molecular weight, aqueous solubility, and octanol-water partitioning coefficient with which relative MAH transport retardation, the linear phase distribution coefficient, and the dimensionless partitioning coefficient between sorption sites.
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Affiliation(s)
- Steven P Labrecque
- School of Earth and Environmental Sciences, Queens College, City University of New York, Flushing, New York 11367, USA
| | - William J Blanford
- School of Earth and Environmental Sciences, Queens College, City University of New York, Flushing, New York 11367, USA; Earth and Environmental Sciences, The Graduate Center, 365 Fifth Avenue, New York, NY 10016, USA.
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Li X, Xu L, Nie H, Lei L. Dexamethasone-loaded β-cyclodextrin for osteogenic induction of mesenchymal stem/progenitor cells and bone regeneration. J Biomed Mater Res A 2020; 109:1125-1135. [PMID: 32981208 DOI: 10.1002/jbm.a.37104] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 09/23/2020] [Accepted: 09/26/2020] [Indexed: 01/11/2023]
Abstract
Dexamethasone (DEX) is a glucocorticoid commonly used as an in vitro osteogenic inducer of mesenchymal stem/progenitor cells (abbreviated MSCs). However, several studies investigating the effects of glucocorticoids on bone regeneration through systemic injections have demonstrated negative impacts of the drugs at high concentration on the healing of hard tissues. These contrasting evidences suggest that application of glucocorticoids should be limited to low dosages but at the same time a long enough treatment period is preferred, which prompted us to evaluate the effects of different local release systems of DEX on MSC differentiation and bone repair. Two types of DEX-loaded β-cyclodextrin (CD) complexes, including CD/DEX and CD/AD-DEX, were fabricated via host-guest interactions and characterized by FTIR, 1H-NMR, MS-ESI, and UV-vis. The results demonstrated that these CD-based assemblies released DEX in differentiated profiles, with CD/DEX releasing significantly faster than CD/AD-DEX. Although CD/DEX were slightly more powerful than CD/AD-DEX in inducing rat bone marrow MSCs (rBMSCs) into osteogenic lineage in vitro, CD/AD-DEX was advantageous over CD/DEX in accelerating bone regeneration over a time period of 4 weeks in a rat tibia defect model. The results suggest that DEX-loaded assemblies via host-guest interactions are flexible in modulating DEX release patterns and have great potential in bone tissue engineering.
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Affiliation(s)
- Xing Li
- Department of Orthodontics, Central South University Xiangya Stomatological Hospital, Changsha, China
| | - Lu Xu
- Department of Biomedical Engineering, College of Biology, Hunan University, Changsha, China
| | - Hemin Nie
- Department of Biomedical Engineering, College of Biology, Hunan University, Changsha, China
| | - Lei Lei
- Department of Orthodontics, Central South University Xiangya Stomatological Hospital, Changsha, China
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Ukalska-Jaruga A, Smreczak B. The Impact of Organic Matter on Polycyclic Aromatic Hydrocarbon (PAH) Availability and Persistence in Soils. Molecules 2020; 25:molecules25112470. [PMID: 32466451 PMCID: PMC7321076 DOI: 10.3390/molecules25112470] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 05/23/2020] [Accepted: 05/25/2020] [Indexed: 12/15/2022] Open
Abstract
Polycyclic aromatic hydrocarbons (PAHs) exhibit persistence in soils, and most of them are potentially mutagenic/carcinogenic and teratogenic for human beings but also influence the growth and development of soil organisms. The PAHs emitted into the atmosphere are ultimately deposited (by dry or wet deposition processes) onto the soil surface where they tend to accumulate. Soil organic matter (SOM) plays an important role in the fate and transformation processes of PAHs, affecting their mobility, availability, and persistence. Therefore, the aim of this research was to investigate the influence of SOM fractional diversification (fulvic acids-FA, humic acids-HA, and humins-HN) on PAH availability and persistence in soils. Twenty soil samples (n = 20) were collected from upper horizons (0-30 cm) of agricultural soils exposed to anthropogenic emissions from industrial and domestic sources. The assessment of PAH concentrations included the determination of medium-molecular-weight compounds from the US EPA list: fluoranthene-FLA, pyrene-PYR, benz(a)anthracene-BaA, and chrysene-CHR. The assessment was conducted using the GC-MS/MS technique. Three operationally defined fractions were investigated: total extractable PAHs (TE-PAHs) fraction, available/bioavailable PAHs (PB-PAHs) fraction, and nonavailable/residual PAHs (RE-PAHs) fraction, which was calculated as the difference between total and available PAHs. TE-PAHs were analyzed by dichloromethane extraction, while PB-PAHs were analyzed with a hydrophobic β-cyclodextrin solution. SOM was characterized by total organic carbon content (Turin method) and organic carbon of humic substances including FA, HA, HN (IHSS method). Concentrations of PAHs differed between soils from 193.5 to 3169.5 µg kg-1, 4.3 to 226.4 µg kg-1, and 148.6 to 3164.7 µg kg-1 for ∑4 TE-PAHs, ∑4 PB-PAHs, and ∑4 RE-PAHs, respectively. The ∑4 PB-PAHs fraction did not exceed 30% of ∑4 TE-PAHs. FLA was the most strongly bound in soil (highest content of RE-FLA), whereas PYR was the most available (highest content of PB-PYR). The soils were characterized by diversified total organic carbon (TOC) concentration (8.0-130.0 g kg-1) and individual SOM fractions (FA = 0.4-7.5 g kg-1, HA = 0.6-13.0 g kg-1, HN = 0.9-122.9 g kg-1). FA and HA as the labile fraction of SOM with short turnover time strongly positively influenced the potential ∑4 PAH availability (r = 0.56 and r = 0.52 for FA and HA, respectively). HN, which constitutes a stable fraction of organic matter with high hydrophobicity and poor degradability, was strongly correlated with ∑4 RE-PAHs (r = 0.75), affecting their persistence in soil.
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Dialamehpour F, Shafiei F. Quantitative structure–property relationship models to predict thermodynamic properties of some mono and polycyclic aromatic hydrocarbons using genetic algorithm‐multiple linear regression. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201900319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Fatemeh Shafiei
- Department of Chemistry, Arak BranchIslamic Azad University Arak Iran
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Predicting Value of Binding Constants of Organic Ligands to Beta-Cyclodextrin: Application of MARSplines and Descriptors Encoded in SMILES String. Symmetry (Basel) 2019. [DOI: 10.3390/sym11070922] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The quantitative structure–activity relationship (QSPR) model was formulated to quantify values of the binding constant (lnK) of a series of ligands to beta–cyclodextrin (β-CD). For this purpose, the multivariate adaptive regression splines (MARSplines) methodology was adopted with molecular descriptors derived from the simplified molecular input line entry specification (SMILES) strings. This approach allows discovery of regression equations consisting of new non-linear components (basis functions) being combinations of molecular descriptors. The model was subjected to the standard internal and external validation procedures, which indicated its high predictive power. The appearance of polarity-related descriptors, such as XlogP, confirms the hydrophobic nature of the cyclodextrin cavity. The model can be used for predicting the affinity of new ligands to β-CD. However, a non-standard application was also proposed for classification into Biopharmaceutical Classification System (BCS) drug types. It was found that a single parameter, which is the estimated value of lnK, is sufficient to distinguish highly permeable drugs (BCS class I and II) from low permeable ones (BCS class II and IV). In general, it was found that drugs of the former group exhibit higher affinity to β-CD then the latter group (class III and IV).
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Khan NA, Johnson MD, Kubicki JD, Holguin FO, Dungan B, Carroll KC. Cyclodextrin-enhanced 1,4-dioxane treatment kinetics with TCE and 1,1,1-TCA using aqueous ozone. CHEMOSPHERE 2019; 219:335-344. [PMID: 30551099 DOI: 10.1016/j.chemosphere.2018.11.200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 11/27/2018] [Accepted: 11/28/2018] [Indexed: 06/09/2023]
Abstract
Enhanced reactivity of aqueous ozone (O3) with hydroxypropyl-β-cyclodextrin (HPβCD) and its impact on relative reactivity of O3 with contaminants were evaluated herein. Oxidation kinetics of 1,4-dioxane, trichloroethylene (TCE), and 1,1,1-trichloroethane (TCA) using O3 in single and multiple contaminant systems, with and without HPβCD, were quantified. 1,4-Dioxane decay rate constants for O3 in the presence of HPβCD increased compared to those without HPβCD. Density functional theory molecular modeling confirmed that formation of ternary complexes with HPβCD, O3, and contaminant increased reactivity by increasing reactant proximity and through additional reactivity within the HPβCD cavity. In the presence of chlorinated co-contaminants, the oxidation rate constant of 1,4-dioxane was enhanced. Use of HPβCD enabled O3 reactivity within the HPβCD cavity and enhanced 1,4-dioxane treatment rates without inhibition in the presence of TCE, TCA, and radical scavengers including NaCl and bicarbonate. Micro-environmental chemistry within HPβCD inclusion cavities mediated contaminant oxidation reactions with increased reaction specificity.
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Affiliation(s)
- Naima A Khan
- Water Science and Management Program, New Mexico State University, MSC 3Q P.O. Box 30003, Las Cruces, NM 88003, USA; Plant & Environmental Science, New Mexico State University, MSC 3Q P.O. Box 30003, Las Cruces, NM 88003, USA
| | - Michael D Johnson
- Department of Chemistry and Biochemistry, New Mexico State University, MSC 3C P.O. Box 30001, Las Cruces, NM 88003, USA
| | - James D Kubicki
- Department of Geological Sciences, University of Texas at El Paso, El Paso, TX 79968-0555, USA
| | - F Omar Holguin
- Plant & Environmental Science, New Mexico State University, MSC 3Q P.O. Box 30003, Las Cruces, NM 88003, USA
| | - Barry Dungan
- Plant & Environmental Science, New Mexico State University, MSC 3Q P.O. Box 30003, Las Cruces, NM 88003, USA
| | - Kenneth C Carroll
- Water Science and Management Program, New Mexico State University, MSC 3Q P.O. Box 30003, Las Cruces, NM 88003, USA; Plant & Environmental Science, New Mexico State University, MSC 3Q P.O. Box 30003, Las Cruces, NM 88003, USA.
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7
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Ding Z, Xiao J, Zhang Y, Jiang Y, Chen W, Hu J, Guo Y, Zhang B. Pharmacokinetics and liver uptake of three Schisandra lignans in rats after oral administration of liposome encapsulating β-cyclodextrin inclusion compound of Schisandra extract. J Liposome Res 2019; 29:121-132. [DOI: 10.1080/08982104.2018.1430830] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Zhiying Ding
- School of Pharmaceutical Sciences, Jilin University, Changchun City, Jilin Province, P. R. China
- The Key Laboratory of Pathobiology, Ministry of Education, Jilin University, Changchun, China
| | - Jiajing Xiao
- School of Pharmaceutical Sciences, Jilin University, Changchun City, Jilin Province, P. R. China
| | - Yue Zhang
- School of Pharmaceutical Sciences, Jilin University, Changchun City, Jilin Province, P. R. China
- The First Hospital of Jilin University, Changchun, P. R. China
| | - Yueyao Jiang
- School of Pharmaceutical Sciences, Jilin University, Changchun City, Jilin Province, P. R. China
| | - Weiqiang Chen
- School of Pharmaceutical Sciences, Jilin University, Changchun City, Jilin Province, P. R. China
| | - Jiahui Hu
- School of Pharmaceutical Sciences, Jilin University, Changchun City, Jilin Province, P. R. China
| | - Yu Guo
- School of Pharmaceutical Sciences, Jilin University, Changchun City, Jilin Province, P. R. China
| | - Bingren Zhang
- College of Instrumentation and Electrical Engineering, Jilin University, Changchun City, Jilin Province, P. R. China
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Molecular polarity effect on the association constant of cyclodextrin-pyrimidine nucleobases in water. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.11.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Cheng Q, Liu G, Zhang P, Xu W, Tang K. Lipase-catalyzed hydrolysis of (R,S)-2,3-diphenylpropionic methyl ester enhanced by hydroxypropyl-β-cyclodextrin. Biotechnol Prog 2018; 34:1355-1362. [PMID: 30281958 DOI: 10.1002/btpr.2716] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 08/09/2018] [Indexed: 01/06/2023]
Abstract
The enantioselective hydrolysis of (R,S)-2,3-diphenylpropionic methyl ester ((R,S)-2,3-2-PPAME) catalyzed by lipase to (R)-2,3-diphenylpropionic acid ((R)-2,3-2-PPA) was studied in an aqueous system. The catalytic effects of different types of lipase were compared, and Candida antarctica lipase A (CALA) with higher catalytic activity and enantioselectivity was selected. Hydroxypropyl-β-cyclodextrin (HP-β-CD) was added to the aqueous system to increase the solubility of 2,3-2-PPAME, which resulted in an increase of 35.56% in substrate conversion remaining the high enantiomeric excess. The factors influencing the substrate conversion and the optical purity of product such as temperature, pH, concentrations of CALA and HP-β-CD, substrate loading, and reaction time were optimized. The optimal conditions for this reaction were obtained, including pH of 5.5, 30 mg/mL CALA, 25 mmol/L HP-β-CD, 0.12 mmol substrate, temperature at 60 °C, agitation speed at 400 rpm, and 48 h for reaction time. Under these optimal conditions, the substrate conversion was up to 44.70% and the optical purity of the product (R)-2,3-2-PPA was up to 98.20%. This work provides an efficient alternative method for lipase-catalyzed enantioselective hydrolysis of 2,3-2-PPAME to (R)-2,3-2-PPA by β-cyclodextrin inclusion in an aqueous reaction system of hydrolysis. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 34:1355-1362, 2018.
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Affiliation(s)
- Qing Cheng
- Dept. of Chemistry and Chemical Engineering, Hunan Inst. of Science and Technology, Yueyang, Hunan, China
| | - Guangyong Liu
- Dept. of Chemistry and Chemical Engineering, Hunan Inst. of Science and Technology, Yueyang, Hunan, China
| | - Panliang Zhang
- Dept. of Chemistry and Chemical Engineering, Hunan Inst. of Science and Technology, Yueyang, Hunan, China
| | - Weifeng Xu
- Dept. of Chemistry and Chemical Engineering, Hunan Inst. of Science and Technology, Yueyang, Hunan, China
| | - Kewen Tang
- Dept. of Chemistry and Chemical Engineering, Hunan Inst. of Science and Technology, Yueyang, Hunan, China
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Khan NA, Johnson MD, Carroll KC. Spectroscopic methods for aqueous cyclodextrin inclusion complex binding measurement for 1,4-dioxane, chlorinated co-contaminants, and ozone. JOURNAL OF CONTAMINANT HYDROLOGY 2018; 210:31-41. [PMID: 29478672 DOI: 10.1016/j.jconhyd.2018.02.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 01/25/2018] [Accepted: 02/08/2018] [Indexed: 06/08/2023]
Abstract
Recalcitrant organic contaminants, such as 1,4-dioxane, typically require advanced oxidation process (AOP) oxidants, such as ozone (O3), for their complete mineralization during water treatment. Unfortunately, the use of AOPs can be limited by these oxidants' relatively high reactivities and short half-lives. These drawbacks can be minimized by partial encapsulation of the oxidants within a cyclodextrin cavity to form inclusion complexes. We determined the inclusion complexes of O3 and three common co-contaminants (trichloroethene, 1,1,1-trichloroethane, and 1,4-dioxane) as guest compounds within hydroxypropyl-β-cyclodextrin. Both direct (ultraviolet or UV) and competitive (fluorescence changes with 6-p-toluidine-2-naphthalenesulfonic acid as the probe) methods were used, which gave comparable results for the inclusion constants of these species. Impacts of changing pH and NaCl concentrations were also assessed. Binding constants increased with pH and with ionic strength, which was attributed to variations in guest compound solubility. The results illustrate the versatility of cyclodextrins for inclusion complexation with various types of compounds, binding measurement methods are applicable to a wide range of applications, and have implications for both extraction of contaminants and delivery of reagents for treatment of contaminants in wastewater or contaminated groundwater.
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Affiliation(s)
- Naima A Khan
- Water Science and Management, Plant & Environmental Science, New Mexico State University, MSC 3167, P.O. Box 30001, Las Cruces, NM 88003-8001, United States
| | - Michael D Johnson
- Department of Chemistry of and Biochemistry, New Mexico State University, Las Cruces, NM 88003-8003, United States
| | - Kenneth C Carroll
- Water Science and Management, Plant & Environmental Science, New Mexico State University, MSC 3167, P.O. Box 30001, Las Cruces, NM 88003-8001, United States.
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Blanford WJ, Pecoraro MP, Heinrichs R, Boving TB. Enhanced reductive de-chlorination of a solvent contaminated aquifer through addition and apparent fermentation of cyclodextrin. JOURNAL OF CONTAMINANT HYDROLOGY 2018; 208:68-78. [PMID: 29289350 DOI: 10.1016/j.jconhyd.2017.10.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 10/26/2017] [Accepted: 10/27/2017] [Indexed: 06/07/2023]
Abstract
In a field study, aqueous cyclodextrin (CD) was investigated for its ability to extract chlorinated volatile organic compounds (cVOC), such as trichloroethylene (TCE), 1,1,1-trichloroethane (TCA), and dichloroethene (DCE) through in-situ flushing of a sandy aquifer. After cessation of aquifer flushing, a plume of CD was left. Changes in CD, cVOC, and inorganic terminal electron acceptors (TEAs) (DO, nitrate, sulfate, iron) were monitored in four rounds of wellwater sampling (20, 210, 342, and 425days after cessation of active pumping). Post-CD flushing VOC levels rebounded (850% for TCE, 190% for TCA, and 53% for DCE) between the first two sampling rounds, apparently due to rate-limited desorption from aquifer media and dissolution from remaining NAPL. However, substantial reduction in the mass of TCE (6.3 to 0.11mol: 98%) and TCA (2.8 to 0.73mol: 74%) in groundwater was observed between 210 and 425days. DCE should primarily be produced from the degradation of TCE and is expected to subsequently degrade to chloroethene. Since DCE levels decreased only slightly (0.23 to 0.17mol: 26%), its degradation rate should be similar to that produced from the decaying TCE. Cyclodextrin was monitored starting from day 210. The mass of residual CD (as measured by Total Organic Carbon) decreased from 150mol (day 210) to 66 (day 425) (56% decrease). The naturally anaerobic zone within the aquifer where residual CD mass decreased coincided with a loss of other major potential TEAs: nitrate (97% loss), sulfate (31%) and iron (31%). In other studies, TCE and 1,1,1-TCA have been found to be more energetically favorable TEAs than sulfate and iron and their degradation via reductive dechlorination has been found to be enhanced by the fermentation of carbohydrates. Such processes can explain these observations, but more investigation is needed to evaluate whether residual levels of CD can facilitate the anaerobic degradation of chlorinated VOCs.
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Affiliation(s)
- William James Blanford
- School of Earth and Environmental Science, Queens College, City University of New York, Flushing, NY 11367, USA.
| | - Michael Philip Pecoraro
- School of Earth and Environmental Science, Queens College, City University of New York, Flushing, NY 11367, USA
| | - Rebecca Heinrichs
- Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70808, USA
| | - Thomas Bernhard Boving
- Department of Geosciences and Department of Civil and Environmental Engineering, University of Rhode Island, Kingston, RI 02881, USA
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Dettmer A, Ball R, Boving TB, Khan NA, Schaub T, Sudasinghe N, Fernandez CA, Carroll KC. Stabilization and prolonged reactivity of aqueous-phase ozone with cyclodextrin. JOURNAL OF CONTAMINANT HYDROLOGY 2017; 196:1-9. [PMID: 27993469 DOI: 10.1016/j.jconhyd.2016.11.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 11/15/2016] [Accepted: 11/27/2016] [Indexed: 06/06/2023]
Abstract
Recalcitrant organic groundwater contaminants, such as 1,4-dioxane, may require strong oxidants for complete mineralization. However, their efficacy for in-situ chemical oxidation (ISCO) is limited by oxidant decay and reactivity. Hydroxypropyl-β-cyclodextrin (HPβCD) was examined for its ability to stabilize aqueous-phase ozone (O3) and prolong oxidation potential through inclusion complex formation. Partial transformation of HPβCD by O3 was observed. However, HPβCD proved to be sufficiently recalcitrant, because it was only partially degraded in the presence of O3. The formation of a HPβCD:O3 clathrate complex was observed, which stabilized decay of O3. The presence of HPβCD increased the O3 half-life linearly with increasing HPβCD:O3 molar ratio. The O3 half-life in solutions increased by as much as 40-fold relative to HPβCD-free O3 solutions. Observed O3 release from HPβCD and indigo oxidation confirmed that the formation of the inclusion complex is reversible. This proof-of-concept study demonstrates that HPβCD can complex O3 while preserving its reactivity. These results suggest that the use of clathrate stabilizers, such as HPβCD, can support the development of a facilitated-transport enabled ISCO for the O3 treatment of groundwater contaminated with recalcitrant compounds.
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Affiliation(s)
- Adam Dettmer
- New Mexico State University, MSC 3Q, P.O. Box 30003, Las Cruces, NM 88003, USA
| | - Raymond Ball
- Enchem Engineering, Inc., 151 California Street, Newton, MA 02458, USA
| | | | - Naima A Khan
- New Mexico State University, MSC 3Q, P.O. Box 30003, Las Cruces, NM 88003, USA
| | - Tanner Schaub
- New Mexico State University, MSC 3Q, P.O. Box 30003, Las Cruces, NM 88003, USA
| | - Nilusha Sudasinghe
- New Mexico State University, MSC 3Q, P.O. Box 30003, Las Cruces, NM 88003, USA
| | | | - Kenneth C Carroll
- New Mexico State University, MSC 3Q, P.O. Box 30003, Las Cruces, NM 88003, USA.
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Exploring 3D structural influences of aliphatic and aromatic chemicals on α-cyclodextrin binding. J Colloid Interface Sci 2016; 468:42-50. [DOI: 10.1016/j.jcis.2016.01.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 01/14/2016] [Accepted: 01/15/2016] [Indexed: 11/17/2022]
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14
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Ren B, Zhang M, Gao H, Zheng J, Jia L. Atomic elucidation of the cyclodextrin effects on DDT solubility and biodegradation. Phys Chem Chem Phys 2016; 18:17380-8. [DOI: 10.1039/c6cp02790c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Different binding modes between DDT and CDs explain why only α-CD can promote the bioavailability and biodegradation of DDT by simultaneously increasing its aqueous solubility and membrane interaction.
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Affiliation(s)
- Baiping Ren
- School of Life Science and Biotechnology
- Dalian University of Technology
- Dalian 116024
- China
- Department of Chemical and Biomolecular Engineering
| | - Mingzhen Zhang
- Department of Chemical and Biomolecular Engineering
- The University of Akron
- Akron
- USA
| | - Huipeng Gao
- School of Life Science and Biotechnology
- Dalian University of Technology
- Dalian 116024
- China
| | - Jie Zheng
- Department of Chemical and Biomolecular Engineering
- The University of Akron
- Akron
- USA
| | - Lingyun Jia
- School of Life Science and Biotechnology
- Dalian University of Technology
- Dalian 116024
- China
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15
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Serio N, Levine M. Efficient extraction and detection of aromatic toxicants from crude oil and tar balls using multiple cyclodextrin derivatives. MARINE POLLUTION BULLETIN 2015; 95:242-7. [PMID: 25956442 DOI: 10.1016/j.marpolbul.2015.04.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 03/24/2015] [Accepted: 04/10/2015] [Indexed: 05/08/2023]
Abstract
Herein we report the efficient extraction of aromatic analytes from crude oil and tar balls using multiple cyclodextrin derivatives. The known propensity of the cyclodextrins to bind hydrophobic guests in their hydrophobic interiors enhanced the extraction of aromatic analytes from the oil layer to the aqueous layer, with methyl-β-cyclodextrin and β-cyclodextrin providing the most significant enhancement in extraction efficiencies of aromatic toxicants (69% aromatic toxicants in aqueous layer in the presence of methyl-β-cyclodextrin compared to 47% in cyclodextrin-free solution for tar ball oil extraction), and provide optimal tunability for developing efficient extraction systems. The cyclodextrin derivatives also promoted efficient energy transfer in the aqueous solutions, with up to 86% efficient energy transfer observed in the presence of γ-cyclodextrin compared to 50% in the absence of cyclodextrin for oil spill oil extraction. Together, this dual function extraction followed by detection system has potential in the development of environmental remediation systems.
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Affiliation(s)
- Nicole Serio
- Department of Chemistry, University of Rhode Island, 51 Lower College Road, Kingston, RI 02881, United States
| | - Mindy Levine
- Department of Chemistry, University of Rhode Island, 51 Lower College Road, Kingston, RI 02881, United States.
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Ren B, Gao H, Cao Y, Jia L. In silico understanding of the cyclodextrin-phenanthrene hybrid assemblies in both aqueous medium and bacterial membranes. JOURNAL OF HAZARDOUS MATERIALS 2015; 285:148-156. [PMID: 25497028 DOI: 10.1016/j.jhazmat.2014.12.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 11/13/2014] [Accepted: 12/01/2014] [Indexed: 06/04/2023]
Abstract
The explicit-solvent molecular dynamic (MD) simulation and adaptive biased forces (ABF) methods were employed to systemically study the structural and thermodynamic nature of the β-cyclodextrin (βCD) monomer, phenanthrene (Phe) monomer, and their inclusion complexes in both the aqueous and membrane environments, aiming at clarifying the atomic-level mechanisms underlying in the CD-enhanced degradation of polycyclic aromatic hydrocarbons (PAHs) by bacteria. Simulations showed that βCD and Phe monomers could associate together to construct two distinctive assemblies, i.e, βCD1-Phe1 and βCD2-Phe1, respectively. The membrane-involved equilibrium simulations and the data of potential of mean forces (PMFs) further confirmed that Phe monomer was capable of penetrating through the membranes without confronting any large energy barrier, whereas, the single βCD and βCD-involved assemblies were unable to pass across the membranes. These observations clearly suggested that βCD only served as the carrier to enhance the bioavailability of Phe rather than the co-substrate in the Phe biodegradation process. The Phe-separation PMF profiles indicated that the maximum of the Phe uptake by bacteria would be achieved by the "optimal" βCD:Phe molar ratio, which facilitated the maximal formation of βCD1-Phe1 inclusion and the minimal construction of βCD2-Phe1 complex.
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Affiliation(s)
- Baiping Ren
- College of Life Science and Biotechnology, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, China; State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Huipeng Gao
- College of Life Science and Biotechnology, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, China
| | - Yafeng Cao
- College of Life Science and Biotechnology, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, China
| | - Lingyun Jia
- College of Life Science and Biotechnology, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, China.
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