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Okhrimenko D, Lakshtanov L, Olsson M, Ceccato M, Dalby K, Rodriguez-Blanco J, Andersson M, Stipp S. Adsorption of nitrogen heterocyclic compounds (NHC) on soil minerals: Quinoline as an example. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125899] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kim J, Hyun S. Sorption of ionic and nonionic organic solutes onto giant Miscanthus-derived biochar from methanol-water mixtures. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 615:805-813. [PMID: 28992505 DOI: 10.1016/j.scitotenv.2017.09.296] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 09/23/2017] [Accepted: 09/27/2017] [Indexed: 06/07/2023]
Abstract
The sorption of naphthalene (NAP) and 1-naphthoic acid (1-NAPA) onto giant Miscanthus-derived biochar was investigated in methanol volume fractions (fc) of 0-0.6 as a function of ionic composition (5mM CaCl2 and 10mM KCl) and liquid pH (2 and 7). The sorption onto biochar was nonlinear with 0.42≤N≤0.95; thus, a concentration-specific sorption constant (Km) was compared. The Km log linearly decreased with increasing fc, except for 1-NAPA from a CaCl2 mixture at pH7. Isotherm data was fitted with a cosolvency sorption model through which the slope (ασ) of the inverse log linear Km-fc plot and empirical constant (α) were obtained. NAP sorption was well described by the cosolvency model with the α value being 0.41-0.53, indicating a methanol-biochar interaction favoring more sorption than the cosolvency based prediction. In particular, the slope (ασ) of 1-NAPA was lower than that of NAP, indicating less reduction of 1-NAPA sorption (i.e., lower α value) by methanol. In comparison with other sorbents, the α value was approximately intermediate between a humic substance and kaolinite clay. An analysis of FT-IR spectra suggested the transformation of O-containing functional groups by methanol, which will subsequently boost the π-π interaction between an organic solute and biochar. Moreover, Ca2+-induced sorption between anionic 1-NAPA and a negatively charged biochar surface was also fortified in the methanol mixture. The results revealed unexplored cosolvent effects on organic solute sorption onto biochar and identified the hydrophobic and hydrophilic sorption moieties of biochar as affected by the cosolvent.
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Affiliation(s)
- Juhee Kim
- Department of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Seunghun Hyun
- Department of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea.
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Rameshraja D, Srivastava VC, Kushwaha JP, Mall ID. Competitive adsorption isotherm modelling of heterocyclic nitrogenous compounds, pyridine and quinoline, onto granular activated carbon and bagasse fly ash. CHEMICAL PAPERS 2017. [DOI: 10.1007/s11696-017-0321-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hofmann R, Grösbacher M, Griebler C. Mini Sediment Columns and Two-Dimensional Sediment Flow-Through Microcosms: Versatile Experimental Systems for Studying Biodegradation of Organic Contaminants in Groundwater Ecosystems. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/8623_2016_210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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Kim M, Kim J, Kim JG, Hyun S. Factors influencing inapplicability of cosolvency-induced model on organic acid sorption onto humic substance from methanol mixture. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:15745-15754. [PMID: 26028349 DOI: 10.1007/s11356-015-4742-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 05/18/2015] [Indexed: 06/04/2023]
Abstract
Applicability of cosolvency model for describing the sorption of organic acids to humic substance was investigated by analyzing dataset of sorption (K m) and solubility (S m) of selected solutes (benzoic acid, 1-naphthoic acid, 2,4-dichlorophenoxyacetic acid, and 2,4,6-trichlorophenol (2,4,6-TCP)) as a function of pH(appCME) (apparent pH of liquid phase) and f c (methanol volume fractions). For all solutes, the K m decreased with f c with the K m reduction being less than the S m-based prediction. The slope of log K m-f c plot in the three organic carboxylic acids was well correlated with their cosolvency power, whereas the data of organic phenolic acid (2,4,6-TCP) was placed above the trend, indicating the different actions of functional groups. The occurrence of Ca(2+) bridge between carboxylate and negatively charged humic surface may explain this phenomenon. Normalizing the K m to the corresponding S m (α' = K m/S m) was not in unity over the pH(app)-f c range but decreased with f c, indicating a possible structural modification of sorption domain favoring extra sorption. For a given solute, the α' of neutral species was always greater than that of anionic species, showing that extra interaction will be likely at pH(app) <pK a - 2 when both solute and sorbent are uncharged. In short, the knowledge of cosolvent-enhanced solubility is incapable of describing sorption of organic acids by humic substance in methanol/water mixtures. Modification of humic structure and hydrophilic interaction (such as Ca(2+) bridge and same-charge repulsion) is considered a relevant process that possibly restricts the applicability of the cosolvency model.
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Affiliation(s)
- Minhee Kim
- Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 136-713, South Korea
| | - Juhee Kim
- Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 136-713, South Korea
| | - Jeong-Gyu Kim
- Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 136-713, South Korea
| | - Seunghun Hyun
- Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 136-713, South Korea.
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Mamy L, Patureau D, Barriuso E, Bedos C, Bessac F, Louchart X, Martin-laurent F, Miege C, Benoit P. Prediction of the Fate of Organic Compounds in the Environment From Their Molecular Properties: A Review. CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY 2015; 45:1277-1377. [PMID: 25866458 PMCID: PMC4376206 DOI: 10.1080/10643389.2014.955627] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A comprehensive review of quantitative structure-activity relationships (QSAR) allowing the prediction of the fate of organic compounds in the environment from their molecular properties was done. The considered processes were water dissolution, dissociation, volatilization, retention on soils and sediments (mainly adsorption and desorption), degradation (biotic and abiotic), and absorption by plants. A total of 790 equations involving 686 structural molecular descriptors are reported to estimate 90 environmental parameters related to these processes. A significant number of equations was found for dissociation process (pKa), water dissolution or hydrophobic behavior (especially through the KOW parameter), adsorption to soils and biodegradation. A lack of QSAR was observed to estimate desorption or potential of transfer to water. Among the 686 molecular descriptors, five were found to be dominant in the 790 collected equations and the most generic ones: four quantum-chemical descriptors, the energy of the highest occupied molecular orbital (EHOMO) and the energy of the lowest unoccupied molecular orbital (ELUMO), polarizability (α) and dipole moment (μ), and one constitutional descriptor, the molecular weight. Keeping in mind that the combination of descriptors belonging to different categories (constitutional, topological, quantum-chemical) led to improve QSAR performances, these descriptors should be considered for the development of new QSAR, for further predictions of environmental parameters. This review also allows finding of the relevant QSAR equations to predict the fate of a wide diversity of compounds in the environment.
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Affiliation(s)
- Laure Mamy
- INRA-AgroParisTech, UMR 1402 ECOSYS (Ecologie Fonctionnelle et Ecotoxicologie des Agroécosystèmes), Versailles, France
| | - Dominique Patureau
- INRA, UR 0050 LBE (Laboratoire de Biotechnologie de l’Environnement), Narbonne, France
| | - Enrique Barriuso
- INRA-AgroParisTech, UMR 1402 ECOSYS (Ecologie Fonctionnelle et Ecotoxicologie des Aroécosystèmes), Thiverval-Grignon, France
| | - Carole Bedos
- INRA-AgroParisTech, UMR 1402 ECOSYS (Ecologie Fonctionnelle et Ecotoxicologie des Aroécosystèmes), Thiverval-Grignon, France
| | - Fabienne Bessac
- Université de Toulouse – INPT, Ecole d’Ingénieurs de Purpan – UPS, IRSAMCLaboratoire de Chimie et Physique Quantiques – CNRS, UMR 5626, Toulouse, France
| | - Xavier Louchart
- INRA, UMR 1221 LISAH (Laboratoire d’étude des Interactions Sol - Agrosystème – Hydrosystème), Montpellier, France
| | | | | | - Pierre Benoit
- INRA-AgroParisTech, UMR 1402 ECOSYS (Ecologie Fonctionnelle et Ecotoxicologie des Aroécosystèmes), Thiverval-Grignon, France
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Yoshii Y, Sakai K, Hoshino N, Takeda T, Noro S, Nakamura T, Akutagawa T. Crystal-to-crystal structural transformation of hydrogen-bonding molecular crystals of (imidazolium)(3-hydroxy-2-quinoxalinecarboxylate) through H2O adsorption–desorption. CrystEngComm 2015. [DOI: 10.1039/c4ce02519a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Crystal-to-crystal structural transformation was observed following H2O adsorption–desorption of hydrogen-bonding molecular crystals.
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Affiliation(s)
- Y. Yoshii
- Graduate School of Engineering
- Tohoku University
- Sendai 980-8579, Japan
| | - K. Sakai
- Department of Bio- & Material Photonics
- Chitose Institute of Science and Technology (CIST)
- Chitose 066-8655, Japan
| | - N. Hoshino
- Graduate School of Engineering
- Tohoku University
- Sendai 980-8579, Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)
- Tohoku University
| | - T. Takeda
- Graduate School of Engineering
- Tohoku University
- Sendai 980-8579, Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)
- Tohoku University
| | - S. Noro
- Research Institute for Electronic Science
- Hokkaido University
- Sapporo 001-0020, Japan
| | - T. Nakamura
- Research Institute for Electronic Science
- Hokkaido University
- Sapporo 001-0020, Japan
| | - T. Akutagawa
- Graduate School of Engineering
- Tohoku University
- Sendai 980-8579, Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)
- Tohoku University
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McKee GA, Kobiela ME, Hatcher PG. Effect of Michael adduction on peptide preservation in natural waters. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2014; 16:2087-2097. [PMID: 24946992 DOI: 10.1039/c4em00075g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The reaction of peptides with chemicals already present in natural waters (such as polycyclic aromatic hydrocarbons) is one method that has been suggested to preserve peptides for the longer term. In this study we test whether the reaction of tetrapeptides with a model quinone can help stabilise the peptide in one polluted riverine system, Elizabeth River in Virginia, USA. We found that there is almost no difference in rate constants between the peptide and its quinone adduct (e.g. 6.62 versus 6.86 per day for AVFA and its respective adduct). However, when monitoring the removal of the adduct from natural water, we identified two new compounds that are formed as a result of its decomposition. Using tandem mass spectrometry we identified potential structures and mechanisms for the formation of these new compounds. These new compounds are more recalcitrant than their parent peptide-quinone adduct, since they remain in solution for 3-10 times longer. Based on our findings we postulate that the reaction of peptides with quinones can help preserve sections of the original peptide following an initial rearrangement of the original adduct, potentially explaining why seemingly labile peptides are observed in most natural waters.
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Affiliation(s)
- G A McKee
- Department of Chemistry and Biochemistry, Old Dominion University, 4402 Elkhorn Avenue, Norfolk, VA 23529, USA.
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Schaffer M, Licha T. A guideline for the identification of environmentally relevant, ionizable organic molecule species. CHEMOSPHERE 2014; 103:12-25. [PMID: 24412098 DOI: 10.1016/j.chemosphere.2013.12.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 11/25/2013] [Accepted: 12/02/2013] [Indexed: 06/03/2023]
Abstract
An increasing number of organic compounds detected today in the aquatic environment are ionizable and, therefore, partially or permanently charged (ionic) under the pH conditions encountered in these systems. For evaluating their environmental behavior, which strongly depends on the charge state, the identification of functional groups together with their correct assignment of the respective acidic or basic dissociation constants (pKa) is essential. Despite the growing concern and increasing awareness for ionizable compounds, contradicting and/or confusing information regarding their acid/base properties can be regularly found in the literature, especially when complex structures are encountered. Therefore, we provide a simplified, general, and comprehensive guideline for the identification of ionizable functional groups in organic compounds combined with the correct assignment of their respective pKa values. Beside the explicit definition of basic terms, several tables with more than 30 of the most frequently encountered ionizable compound classes, including their typical pKa value ranges are the centerpiece of the proposed procedure. The straight forward application of the guideline is successfully shown for several environmentally relevant compounds as example.
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Affiliation(s)
- Mario Schaffer
- Geoscience Centre, Dept. Applied Geology, University of Göttingen, Goldschmidtstr. 3, 37077 Göttingen, Germany
| | - Tobias Licha
- Geoscience Centre, Dept. Applied Geology, University of Göttingen, Goldschmidtstr. 3, 37077 Göttingen, Germany.
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Xiao F, Pignatello JJ. Effect of adsorption nonlinearity on the pH-adsorption profile of ionizable organic compounds. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:1994-2001. [PMID: 24512326 DOI: 10.1021/la403859u] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Solution pH is an important factor in the adsorptive behavior of ionizable organic compounds (IOCs) in many industrial, commercial, and environmental contexts. A linear speciation model (LSM) that assumes the concentration-independent adsorption of charged and neutral species is often employed to model the pH-adsorption profile (edge). Deviations from that model--including the shift of the adsorption edge from its expected inflection point at pH = pK(a) and the appearance of an adsorption maximum ("hump") near the pK(a)--are sometimes used to infer the mechanism. We investigated the adsorption of six organic acids and bases on the nonfunctionalized, extremely low variable-charge surface of graphite. Isotherms at constant pH of both charged and neutral species were usually highly nonlinear, and the adsorption edges typically showed a shift, hump, or both. We postulate that this behavior is due to the gradual extinction of the dissolved neutral or charged species as the pH approaches and then crosses the pK(a). This leads to an increase in the affinity of that species for the solid resulting from the inherent nonlinearity of its isotherm. The extinction of the more strongly adsorbing species mainly causes the shift, whereas the extinction of the less strongly adsorbing species gives rise to the hump. A nonlinear speciation model (NSM) based on Freundlich or Langmuir equations was employed to fit the adsorption edge. The NSM captured both the shift and the hump and was superior to the LSM. Increasing adsorption nonlinearity of the neutral species shifts the adsorption edge in the acidic direction (organic bases) or alkaline direction (organic acids), whereas increasing nonlinearity of the charged species increases the hump size. Both the shift and hump size increase as the difference in adsorption affinity between neutral and charged species decreases. The results show that the concentration dependence alone can strongly affect the shape of pH-adsorption curve and should be taken into account in future modeling.
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Affiliation(s)
- Feng Xiao
- Department of Environmental Sciences, Connecticut Agricultural Experiment Station, New Haven, Connecticut 06504, United States
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11
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Niedbala A, Schaffer M, Licha T, Nödler K, Börnick H, Ruppert H, Worch E. Influence of competing inorganic cations on the ion exchange equilibrium of the monovalent organic cation metoprolol on natural sediment. CHEMOSPHERE 2013; 90:1945-1951. [PMID: 23159068 DOI: 10.1016/j.chemosphere.2012.10.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 10/16/2012] [Accepted: 10/18/2012] [Indexed: 06/01/2023]
Abstract
The aim of this study was to systematically investigate the influence of the mono- and divalent inorganic ions Na(+) and Ca(2+) on the sorption behavior of the monovalent organic cation metoprolol on a natural sandy sediment at pH=7. Isotherms for the beta-blocker metoprolol were obtained by sediment-water batch tests over a wide concentration range (1-100000 μg L(-1)). Concentrations of the competing inorganic ions were varied within freshwater relevant ranges. Data fitted well with the Freundlich sorption model and resulted in very similar Freundlich exponents (n=0.9), indicating slightly non-linear behavior. Results show that the influence of Ca(2+) compared to Na(+) is more pronounced. A logarithmic correlation between the Freundlich coefficient K(Fr) and the concentration or activity of the competing inorganic ions was found allowing the prediction of metoprolol sorption on the investigated sediment at different electrolyte concentrations. Additionally, the organic carbon of the sediment was completely removed for investigating the influence of organic matter on the sorption of metoprolol. The comparison between the experiments with and without organic carbon removal revealed no significant contribution of the organic carbon fraction (0.1%) to the sorption of metoprolol on the in this study investigated sediment. Results of this study will contribute to the development of predictive models for the transport of organic cations in the subsurface.
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Affiliation(s)
- Anne Niedbala
- Geoscience Centre, University of Göttingen, Goldschmidtstr. 3, 37077 Göttingen, Germany
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Hanna K, Lassabatere L, Bechet B. Transport of two naphthoic acids and salicylic acid in soil: experimental study and empirical modeling. WATER RESEARCH 2012; 46:4457-4467. [PMID: 22704930 DOI: 10.1016/j.watres.2012.04.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Revised: 04/18/2012] [Accepted: 04/22/2012] [Indexed: 06/01/2023]
Abstract
In contrast to the parent compounds, the mechanisms responsible for the transport of natural metabolites of polycyclic aromatic hydrocarbons (PAH) in contaminated soils have been scarcely investigated. In this study, the sorption of three aromatic acids (1-naphthoic acid (NA), 1-hydroxy-2-naphthoic acid (HNA) and salicylic acid (SA)) was examined on soil, in a batch equilibrium single-system, with varying pH and acid concentrations. Continuous flow experiments were also carried out under steady-state water flow. The adsorption behavior of naphthoic and benzoic acids was affected by ligand functionality and molecular structure. All modeling options (equilibrium, chemical nonequilibrium, i.e. chemical kinetics, physical nonequilibrium, i.e. surface sites in the immobile water fraction, and both chemical and physical nonequilibrium) were tested in order to describe the breakthrough behavior of organic compounds in homogeneously packed soil columns. Tracer experiments showed a small fractionation of flow into mobile and immobile compartments, and the related hydrodynamic parameters were used for the modeling of reactive transport. In all cases, the isotherm parameters obtained from column tests differed from those derived from the batch experiments. The best accurate modeling was obtained considering nonequilibrium for the three organic compounds. Both chemical and physical nonequilibrium led to appropriate modeling for HNA and NA, while chemical nonequilibrium was the sole option for SA. SA sorption occurs mainly in mobile water and results from the concomitancy of instantaneous and kinetically limited sites. For all organic compounds, retention is contact condition dependent and differs between batch and column experiments. Such results show that preponderant mechanisms are solute dependent and kinetically limited, which has important implications for the fate and transport of carboxylated aromatic compounds in contaminated soils.
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Affiliation(s)
- K Hanna
- Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, LCPME, UMR 7564 CNRS, 405 Rue de Vandoeuvre, F-54600 Villers-les-Nancy, France.
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Tuo BH, Yan JB, Fan BA, Yang ZH, Liu JZ. Biodegradation characteristics and bioaugmentation potential of a novel quinoline-degrading strain of Bacillus sp. isolated from petroleum-contaminated soil. BIORESOURCE TECHNOLOGY 2012; 107:55-60. [PMID: 22243925 DOI: 10.1016/j.biortech.2011.12.114] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 12/06/2011] [Accepted: 12/06/2011] [Indexed: 05/11/2023]
Abstract
Quinoline and its derivatives are widely considered to be environmental pollutants. In this study, the biodegradation characteristics and bioaugmentation potential for a novel strain were described. The strain, named Q2, which could utilize quinoline as the sole carbon, nitrogen and energy source, was isolated and identified as a Bacillus sp. The optimum temperature, initial pH and shaker rotary speed for quinoline degradation were 30°C, pH 8-10 and 100-200 rpm, respectively. During the biodegradation process, the quinoline-N was released as ammonium and the culture broth became yellow, pink and brown in turn, which indicated that several intermediates were generated. GC/MS analysis showed that 2(1H)-quinolinone and 8-hydroxycoumarin were produced. Furthermore, the bioaugmentation of Q2 into the sludge consortium, which was taken from refinery wastewater treatment plant, to degrade quinoline was investigated. The results showed that it could coexist with the other microbes and the remarkably enhanced quinoline biodegradation ability was achieved.
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Affiliation(s)
- Bao-hua Tuo
- College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, People's Republic of China
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Kim J, Kim M, Hyun S, Kim JG, Ok YS. Sorption of acidic organic solute onto kaolinitic soils from methanol-water mixtures. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2012; 47:22-29. [PMID: 22022785 DOI: 10.1080/03601234.2012.601949] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The fate of the acidic organic solute from the soil-water-solvent system is not well-understood. In this study, the effect of the acidic functional group of organic solute in the sorption from cosolvent system was evaluated. The sorption of naphthalene (NAP) and 1-naphthoic acid (1-NAPA) by three kaolinitic soils and two model sorbents (kaolinite and humic acid) were measured as functions of the methanol volume fractions (f (c) ≤ 0.4) and ionic compositions (CaCl(2) and KCl). The solubility of 1-NAPA was also measured in various ionic compositions. The sorption data were interpreted using the cosolvency-induced sorption model. The K (m) values (= the linear sorption coefficient) of NAP with kaolinitic soil for both ionic compositions was log linearly decreased with f (c). However, the K (m) values of 1-NAPA with both ionic compositions remained relatively constant over the f (c) range. For the model sorbent, the K (m) values of 1-NAPA with kaolinite for the KCl system and with humic acid for both ionic compositions decreased with f (c), while the sorption of 1-NAPA with kaolinite for the CaCl(2) system was increased with f (c). From the solubility data of 1-NAPA with f (c), no significant difference was observed with the different ionic compositions, indicating an insignificant change in the aqueous activity of the liquid phase. In conclusion, the enhanced 1-NAPA sorption, greater than that predicted from the cosolvency-induced model, was due to an untraceable interaction between the carboxylate and hydrophilic soil domain in the methanol-water system. Therefore, in order to accurately predict the environmental fate of acidic pesticides and organic solutes, an effort to quantitatively incorporate the enhanced hydrophilic sorption into the current cosolvency-induced sorption model is required.
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Affiliation(s)
- Juhee Kim
- Division of Environmental Science and Ecological Engineering, Korea University, Seoul
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15
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Hanna K, Boily JF. Sorption of two naphthoic acids to goethite surface under flow through conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:8863-8869. [PMID: 21058642 DOI: 10.1021/es102903n] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
While the transport of low molecular weight organic acids was widely investigated, little is known about the mobility of the carboxylated aromatic compounds containing double rings in natural porous media. This study combines macroscopic (batch and column), microscopic (vibration spectroscopy), and surface complexation modeling to evaluate the mobility of two PAH degradation products: naphthoic acid (1-naphthoic acid (NA) and 1-hydroxy-2-naphthoic acid (HNA)), in porous media consisting of goethite-coated sand. The loss of ligands from aqueous solution was attributed to (1) a hydrogen-bonded surface complex present over the entire 3-10 pH range as well as protonated (2) surface and (3) bulk precipitates below pH 5. Mobility in column experiments was strongly affected by ligand functionality. Adsorption breakthrough predictions that make use of surface complexation parameters accurately predicted NA mobility. Those for HNA however predicted much less adsorption reactions than in the batch sorption experiments. Additional breakthrough experiments and test calculations confirmed that these differences were not related to sorption kinetics. HNA adsorption breakthrough data could only be predicted by lowering intrinsic complexation constant of the formation of hydrogen-bonded species, thereby suggesting modifications of the diffuse layer properties under flow conditions. These findings have strong implications in the assessment and prediction of contaminant transport and environmental remediation.
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Affiliation(s)
- K Hanna
- LCPME, UMR 7564 CNRS-Nancy Université, 405 rue de Vandoeuvre, 54600 Villers-les-Nancy, France.
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16
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Connatser RM, Cochran M, Harrison RJ, Sepaniak MJ. Analytical optimization of nanocomposite surface-enhanced Raman spectroscopy/scattering detection in microfluidic separation devices. Electrophoresis 2008; 29:1441-50. [DOI: 10.1002/elps.200700585] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hanna K, Carteret C. Sorption of 1-hydroxy-2-naphthoic acid to goethite, lepidocrocite and ferrihydrite: batch experiments and infrared study. CHEMOSPHERE 2007; 70:178-86. [PMID: 17689586 DOI: 10.1016/j.chemosphere.2007.06.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2007] [Revised: 06/14/2007] [Accepted: 06/18/2007] [Indexed: 05/16/2023]
Abstract
The adsorption of naphthoic acids to iron oxides and hydroxides influences strongly their mobility in soils and sediments. Sorption of 1-hydroxy-2-naphthoic acid (HNA) to three iron oxides was examined over a wide range of conditions (pH, ionic strength, sorbate and sorbent concentrations). In the examination of HNA sorption, Tempkin model was performed to fit sorption data of HNA onto all iron oxides. The adsorption in the Henry law range increases in the order: goethite<lepidocrocite<ferrihydrite, while at high sorbate equilibrium concentration, the trend is opposite. Structure of the HNA surface complexes was examined by infrared spectroscopy at different surface coverages and pH conditions. The variation of HNA sorption with solid-to-solution ratio (SSR) in batch experiments exhibited a solid effect for tested oxides except goethite. The role of hydrophobicity in HNA sorption and an eventual formation of solute aggregation on the solid surface have been particularly highlighted on goethite. These results indicate that the mineralogy of the iron oxides and pH value should be considered when predicting HNA sorption in iron oxides and its fate in soil and environment.
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Affiliation(s)
- K Hanna
- Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, LCPME, UMR 7564 CNRS, Université Henri Poincaré, 405, rue de Vandoeuvre, 54600 Villers-les-Nancy, France.
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Bonczek JL, Nkedi-Kizza P. Using surfactant-modified clays to determine sorption mechanisms for a representative organic base, quinoline. JOURNAL OF ENVIRONMENTAL QUALITY 2007; 36:1803-1810. [PMID: 17965383 DOI: 10.2134/jeq2006.0538] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Sorption of a representative ionizable nitrogen heterocycle, quinoline (pKa = 4.92), was investigated to determine the relative contributions of the neutral and protonated species to the overall process. Batch sorption experiments were conducted on surfactant-modified clays that were synthesized from the exchange of hexadecyltrimethylammonium cations for resident sodium cations on a specimen smectite (Swy-2) at 0, 60, 80, and 100% of the clay's cation exchange capacity (CEC). Hexadecyltrimethylammonium exchange creates highly effective organic partitioning domains within the clay interlayers in proportion to their coverage on the exchange complex. The fractionally exchanged clays, therefore, provided discrete exchange and organic partitioning domains for the protonated and neutral species of quinoline. Data were described by a combined Langmuir-linear isotherm that permitted independent characterization of both sorption components. Results indicated that cationic sorption dominated but that the neutral species can contribute substantially given sufficient organic carbon content relative to the CEC and at pH above the pKa of quinoline. The data obtained in this study for quinoline demonstrated that the combined isotherm (including cation exchange and hydrophobic partitioning terms) describes sorption data and compares favorably with the purely empirical Freundlish isotherm.
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Affiliation(s)
- J L Bonczek
- Soil and Water Science Department, University of Florida, Gainesville, Florida 32611, USA
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Hanna K. Sorption of two aromatic acids onto iron oxides: Experimental study and modeling. J Colloid Interface Sci 2007; 309:419-28. [PMID: 17303153 DOI: 10.1016/j.jcis.2007.01.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2006] [Revised: 01/03/2007] [Accepted: 01/04/2007] [Indexed: 10/23/2022]
Abstract
The transport of aromatic carboxylate compounds in the environment can be strongly influenced by adsorption onto certain minerals, such as iron oxides and hydroxides, found in ground water and soils. Batch experiments with five iron oxides were conducted to quantify the contributions to adsorption from different iron mineral surfaces and compare adsorption characteristics of selected organic acids (gentisic acid (GA) and 1-hydroxy-2-naphthoic acid (HNA)). Because of their widespread abundance in soils and sediments, goethite, lepidocrocite, ferrihydrite, hematite, and magnetite were investigated. Sorption of two organic acids onto iron oxides was examined over a wide range of conditions (pH, ionic strength, and sorbate concentration). Specific surface area and mineral surface charge proved be important for the adsorption of these compounds. The sorption isotherm was described well by the Tempkin equation for both organic acids, with the adsorption constant higher for HNA than GA. For modeling the sorption edges of ferrihydrite and hematite, surface reactions involving the formation of mononuclear (1:1) surface species were proposed. These results indicate that the generalized two-layer model, with the assumption of homogeneous surface sites, could predict sorption on iron oxides over a range of pH conditions. The results of this study suggest that the mineralogy of the iron oxides and the pH value should be considered when predicting sorption of aromatic acids onto iron oxides and their fate in the soil and the environment.
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Affiliation(s)
- K Hanna
- Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, LCPME, UMR 7564 CNRS-Université Henri Poincaré, 405, rue de Vandoeuvre, 54600 Villers-les-Nancy, France.
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