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Ma Y, Li TY, Meng H, Wang GX, Ma J, Xiao Y, Xie WM. The effect of salinity on trimethoprim adsorption by activated sludge extracellular polymeric substances at trace concentration. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 368:122090. [PMID: 39126848 DOI: 10.1016/j.jenvman.2024.122090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2024] [Revised: 07/30/2024] [Accepted: 07/31/2024] [Indexed: 08/12/2024]
Abstract
The saline wastewater produced in industrial activities and seawater use would flow into wastewater treatment plants and affect the characteristic of extracellular polymeric substance (EPS) of activated sludge, which could potentially impact the removal of antibiotics via adsorption. Nonetheless, the effect of salinity on trimethoprim adsorption by activated sludge extracellular polymeric substances at trace concentration and the underlying mechanism remain largely unknown. In this study, the effect of salinity on the adsorption removal of a typical antibiotic, i.e., trimethoprim (TMP) at trace concentration (25.0 μg/L) was evaluated. The results showed the content of EPS was decreased significantly from 56.36 to 21.70 mg/g VSS when the salinity was increased from 0 to 10 g/L. Protein fractions occupied the predominant component of EPS, whose concentration was decreased from 38.17 to 12.83 mg/g VSS. The equilibrium adsorption capacity of activated sludge for TMP was decreased by 49.70% (from 4.97 to 2.50 μg/g VSS). The fluorescence quenching results indicated the fluorescence intensity of tryptophan-like substances was decreased by 30% and the adsorption sites of EPS were decreased from 0.51 to 0.21 when the salinity was increased. The infrared spectrum and XPS results showed that the nitrogen-containing groups from protein were decreased significantly. The circular dichroic analysis showed α helix structure of protein in EPS was decreased with the increase of salinity, which was responsible for the decrease of adsorption capacity for TMP.
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Affiliation(s)
- You Ma
- Jiangsu Engineering Lab of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, 210023, China
| | - Tian-Yu Li
- Jiangsu Engineering Lab of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, 210023, China
| | - Han Meng
- Jiangsu Engineering Lab of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, 210023, China
| | - Guo-Xiang Wang
- Jiangsu Engineering Lab of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, 210023, China
| | - Jie Ma
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, China.
| | - Yan Xiao
- Hangzhou Environmental Protection Research Institute of China Coal Technology & Engineering Group, Hangzhou, 311201, China
| | - Wen-Ming Xie
- Jiangsu Engineering Lab of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, 210023, China.
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Duarte IJM, Lima TMIDO, França AMDM, Buarque HLDB, do Nascimento RF. Adsorption of caffeine using steel wastes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:79977-79994. [PMID: 35290582 DOI: 10.1007/s11356-022-19582-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
Caffeine is the most widespread active pharmaceutical compound in the world, generally studied as a tracer of human pollution, since caffeine levels in surface water correlate with the anthropogenic load of domestic wastewater. This work investigated the use of different steel wastes named as SW-I, SW-II, SW-II, SW-IV, SW-V, and SW-VI in the adsorption of caffeine. These materials were pretreated and characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and point of zero charge. The samples are mainly composed of iron (hematite and magnetite). The caffeine adsorption test indicated that SW-VI (steel slag dust) is the most efficient and promising (removal around 51.68%) in relation to the other residues, which it was selected for further studies. Equilibrium time was reached within 96 h of contact between the adsorbent and the adsorbate, with removal of 84.00%, 81.09%, and 73.19% for the initial concentrations of 10 mg L-1, 20 mg L-1, and 30 mg L-1 of caffeine. The pseudo-first-order, pseudo-second-order, and Elovich models presented a good fit to the experimental data. However, the pseudo-first order model described better the experimental behavior. Adsorption isotherms were performed at three temperatures (298, 308, and 318 K). The maximum adsorption capacity was 17.46 ± 2.27 mg g-1, and experimental data were better fitted by the Sips isotherm. Values of ΔG° and parameters equilibrium of the models of Langmuir, Sips, and Temkin were calculated from the standard enthalpies and standard entropies estimated. The values of ΔG° were negative for the temperatures studied indicating that the adsorption process is viable and spontaneous. Negative values for ΔH° were also found, indicating that the process of caffeine adsorption by SW-VI is an exothermic process (0 to -40 kJ mol-1). Thus, the adsorption of caffeine by SW-VI is a physical process. The SW-VI material showed economic viability and promising for the adsorption of caffeine in aqueous media.
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Affiliation(s)
- Iara Jennifer Moura Duarte
- Universidade Federal do Ceará, Campus do Pici, R. Cinco, 100 - Pres. Kennedy, Fortaleza, CE, 60355-636, Brazil.
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Carbamazepine Removal by Clay-Based Materials Using Adsorption and Photodegradation. WATER 2022. [DOI: 10.3390/w14132047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Carbamazepine (CBZ) is one of the most common emerging contaminants released to the aquatic environment through domestic and pharmaceutical wastewater. Due to its high persistence through conventional degradation treatments, CBZ is considered a typical indicator for anthropogenic activities. This study tested the removal of CBZ through two different clay-based purification techniques: adsorption of relatively large concentrations (20–500 μmol L−1) and photocatalysis of lower concentrations (<20 μmol L−1). The sorption mechanism was examined by FTIR measurements, exchangeable cations released, and colloidal charge of the adsorbing clay materials. Photocatalysis was performed in batch experiments under various conditions. Despite the neutral charge of carbamazepine, the highest adsorption was observed on negatively charged montmorillonite-based clays. Desorption tests indicate that adsorbed CBZ is not released by washing. The adsorption/desorption processes were confirmed by ATR-FTIR analysis of the clay-CBZ particles. A combination of synthetic montmorillonite or hectorite with low H2O2 concentrations under UVC irradiation exhibits efficient homo-heterogeneous photodegradation at μM CBZ levels. The two techniques presented in this study suggest solutions for both industrial and municipal wastewater, possibly enabling water reuse.
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Sato R, Machida S, Sohmiya M, Sugahara Y, Guégan R. Intercalation of a Cationic Cyanine Dye Assisted by Anionic Surfactants within Mg-Al Layered Double Hydroxide. ACS OMEGA 2021; 6:23837-23845. [PMID: 34568663 PMCID: PMC8459359 DOI: 10.1021/acsomega.1c02724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
An original route for the intercalation of a 1,1'-diethyl-2,2'-cyanine iodide (PIC) cationic dye, through the use of anionic surfactants as vector/carrier phases, within Mg-Al layered double hydroxide (LDH) was investigated. From the data acquired from complementary techniques (X-ray diffraction, infrared and UV-visible spectroscopies, thermogravimetry, and fluorimetry), it appears that both the intercalation and aggregation states of the cationic dye within the internal structure of LDH mainly depend on both the surfactant state (monomer form or spherical micelle) and its amount. The intercalation of PIC at a low molar ratio to the anionic surfactant leads to the formation of J-aggregates with singular fluorescence properties that mainly depend on the nature of the anionic surfactant used for the co-intercalation process. The results obtained in this study open new routes for the intercalation of cationic species, assisted by anionic surfactants, within LDHs.
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Affiliation(s)
- Rina Sato
- Department
of Applied Chemistry, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8050, Japan
| | - Shingo Machida
- Department
of Applied Chemistry, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8050, Japan
- Tokyo
University of Science, Katsushika Campus, Musashino 162-8601, Tokyo, Japan
| | - Minoru Sohmiya
- Tokyo
University of Science, Katsushika Campus, Musashino 162-8601, Tokyo, Japan
- Seikei
University, 3-1 Kichijojikitamachi, Musashino 180-8633, Tokyo, Japan
| | - Yoshiyuki Sugahara
- Department
of Applied Chemistry, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8050, Japan
| | - Régis Guégan
- Global
Center for Science and Engineering, Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8050, Japan
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Levard C, Hamdi-Alaoui K, Baudin I, Guillon A, Borschneck D, Campos A, Bizi M, Benoit F, Chaneac C, Labille J. Silica-clay nanocomposites for the removal of antibiotics in the water usage cycle. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:7564-7573. [PMID: 33033933 DOI: 10.1007/s11356-020-11076-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 09/30/2020] [Indexed: 06/11/2023]
Abstract
The increasingly frequent detection of resistant organic micropollutants in waters calls for better treatment of these molecules that are recognized to be dangerous for human health and the environment. As an alternative to conventional adsorbent material such as activated carbon, silica-clay nanocomposites were synthesized for the removal of pharmaceuticals in contaminated water. Their efficiency with respect to carbamazepine, ciprofloxacin, danofloxacin, doxycycline, and sulfamethoxazole was assessed in model water and real groundwater spiked with the five contaminants. Results showed that the efficacy of contaminant removal depends on the chemical properties of the micropollutants. Among the adsorbents tested, the nanocomposite made of 95% clay and 5% SiO2 NPs was the most efficient and was easily recovered from solution after treatment compared with pure clay, for example. The composite is thus a good candidate in terms of operating costs and environmental sustainability for the removal of organic contaminants.
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Affiliation(s)
- Clément Levard
- CNRS, IRD, INRAE, Coll France, CEREGE, Aix-Marseille Univ, Aix-en-Provence, France.
| | - Karima Hamdi-Alaoui
- CNRS, IRD, INRAE, Coll France, CEREGE, Aix-Marseille Univ, Aix-en-Provence, France
| | - Isabelle Baudin
- SUEZ-CIRSEE, 38, rue du président Wilson, 78230, Le Pecq, France
| | - Amélie Guillon
- SUEZ-CIRSEE, 38, rue du président Wilson, 78230, Le Pecq, France
| | - Daniel Borschneck
- CNRS, IRD, INRAE, Coll France, CEREGE, Aix-Marseille Univ, Aix-en-Provence, France
| | - Andrea Campos
- CNRS, Centrale Marseille, FSCM (FR1739), CP2M, Aix Marseille Univ, 13397, Marseille, France
| | - Mohamed Bizi
- BRGM, Water, Environment, Process Development and Analysis Division 3, Avenue C. Guillemin, 45060, Cedex 2, Orleans, France
| | - Florence Benoit
- CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Université, 4 Place Jussieu, F-75005, Paris, France
| | - Corinne Chaneac
- CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Université, 4 Place Jussieu, F-75005, Paris, France
| | - Jérôme Labille
- CNRS, IRD, INRAE, Coll France, CEREGE, Aix-Marseille Univ, Aix-en-Provence, France
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De Oliveira T, Boussafir M, Fougère L, Destandau E, Sugahara Y, Guégan R. Use of a clay mineral and its nonionic and cationic organoclay derivatives for the removal of pharmaceuticals from rural wastewater effluents. CHEMOSPHERE 2020; 259:127480. [PMID: 32634722 DOI: 10.1016/j.chemosphere.2020.127480] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/15/2020] [Accepted: 06/21/2020] [Indexed: 06/11/2023]
Abstract
A Na+ exchanged montmorillonite clay (Na-Mt) and its organoclay derivatives prepared with benzyldimethyltetradecylammonium (BDTA) cationic and polyoxyethylene (20)oleyl-ether (Brij-O20) non-ionic surfactants were used for first time at our knowledge as adsorbents the removal diverse pharmaceuticals (PPs) from samples collected in a rural wastewater facility (town of Josnes in France). The selected facility showed a poor efficiency for the elimination of PPs that were permanently release to the environment. Although involving different interactional mechanisms, the whole adsorbents Na-Mt, nonionic Brij-Mt and cationic BDTA-Mt organoclays, could remove the entire PPs of various chemical nature in a low concentration regime (ng L-1), where electrostatic interactions mainly controlled the adsorption. Thus, the organic PPs cations were preferentially adsorbed onto Na-Mt and Brij0.4-Mt (with its dual hydrophilic-hydrophobic nature) while anionic PPs showed a bold affinity to BDTA-Mt. The hydrophobic environment generated by the intercalation of surfactants within the interlayer space of organoclays conferred a versatility for the adsorption of numerous PPs through weak molecular forces (Van der Waals and/or pi-pi interactions). The study confirmed the proper efficiency of the studied layered materials including organoclays and emphasized about their promising interests in water remediation strategy.
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Affiliation(s)
- Tiago De Oliveira
- Institut des Sciences de La Terre D'Orléans, UMR 7327, CNRS-Université D'Orléans, 1A Rue de La Férollerie, 45071 Orléans Cedex 2, France
| | - Mohammed Boussafir
- Institut des Sciences de La Terre D'Orléans, UMR 7327, CNRS-Université D'Orléans, 1A Rue de La Férollerie, 45071 Orléans Cedex 2, France
| | - Laëtitia Fougère
- Institut de Chimie Organique et Analytique, UMR 7311, CNRS-Université D'Orléans, Rue de Chartres, 45067, Orléans Cedex 2, France
| | - Emilie Destandau
- Institut de Chimie Organique et Analytique, UMR 7311, CNRS-Université D'Orléans, Rue de Chartres, 45067, Orléans Cedex 2, France
| | - Yoshiyuki Sugahara
- Department of Applied Chemistry, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Régis Guégan
- Institut des Sciences de La Terre D'Orléans, UMR 7327, CNRS-Université D'Orléans, 1A Rue de La Férollerie, 45071 Orléans Cedex 2, France; Global Center for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan.
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