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Macasoi C, Meltzer V, Stanculescu I, Romanitan C, Pincu E. Binary Mixtures of Meloxicam and L-Tartaric Acid for Oral Bioavailability Modulation of Pharmaceutical Dosage Forms. J Funct Biomater 2024; 15:104. [PMID: 38667561 PMCID: PMC11050778 DOI: 10.3390/jfb15040104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 04/09/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024] Open
Abstract
Binary mixtures of active pharmaceutical ingredients (API) are researched to improve the oral bioavailability of pharmaceutical dosage forms. The purpose of this study was to obtain mixtures of meloxicam and L-tartaric acid because tartaric acid improves intestinal absorption and meloxicam is more soluble in a weakly basic environment. The mixtures in the 0-1 molar fraction range, obtained from solvent-assisted mechanosynthesis, were investigated by differential scanning calorimetry (DSC), Fourier Transform Infrared (FTIR) spectroscopy, Fourier Transform Raman spectroscopy (FT-Raman), X-ray powder diffraction (XRD) and solubility tests. The physicochemical characteristics of the compounds obtained from DSC data reveal, for the first time, the formation of a co-crystal at meloxicam molar fraction of 0.5. FTIR spectroscopy data show the existence of hydrogen bonds between the co-crystal components meloxicam and L-tartaric acid. FT-Raman spectroscopy was used complementary with FT-IR spectroscopy to analyze the pure APIs and their mixtures, to emphasize the appearance/disappearance and the shifts of the position/intensity of vibrational bands, following the formation of hydrogen-bonded structures or van der Waals interactions, and to especially monitor the crystal lattice vibrations below 400 cm-1. The experimental results obtained by X-ray powder diffraction confirmed the formation of the co-crystal by the loss and, respectively, the apparition of peaks from the single components in the co-crystal diffractogram. The solubility tests showed that the co-crystal product has a lower aqueous solubility due to the acidic character of the other component, tartaric acid. However, when the solubility tests were performed in buffer solution of pH 7.4, the solubility of meloxicam from the co-crystal mixture was increased by 57% compared to that of pure meloxicam. In conclusion, the studied API mixtures may be considered potential biomaterials for improved drug release molecular solids.
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Affiliation(s)
- Cristina Macasoi
- Department of Analytical Chemistry and Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Bd., 030018 Bucharest, Romania; (C.M.); (V.M.); (I.S.)
| | - Viorica Meltzer
- Department of Analytical Chemistry and Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Bd., 030018 Bucharest, Romania; (C.M.); (V.M.); (I.S.)
| | - Ioana Stanculescu
- Department of Analytical Chemistry and Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Bd., 030018 Bucharest, Romania; (C.M.); (V.M.); (I.S.)
- Horia Hulubei National Institute for Physics and Nuclear Engineering, IRASM Department, 30 Reactorului Str., 077125 Magurele, Romania
| | - Cosmin Romanitan
- National Institute for Research and Development in Microtechnologies (IMT Bucharest), 126A Erou Iancu Nicolae Street, 72996 Bucharest, Romania;
| | - Elena Pincu
- Department of Analytical Chemistry and Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Bd., 030018 Bucharest, Romania; (C.M.); (V.M.); (I.S.)
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Ghetu MC, Virgolici M, Tirsoaga A, Stanculescu I. Molecular Modelling of Polychlorinated Dibenzo-p-Dioxins Non-Covalent Interactions with β and γ-Cyclodextrins. Int J Mol Sci 2023; 24:13214. [PMID: 37686019 PMCID: PMC10488135 DOI: 10.3390/ijms241713214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/23/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023] Open
Abstract
Polychlorinated dibenzo-p-dioxins (PCDD) are persistent organic pollutants which result as byproducts in industrial or combustion processes and induce toxicity in both wildlife and humans. In this study, all seven PCDD, tetrachlorinated dibenzo-p-dioxins (TCDD), pentachlorinated dibenzo-p-dioxins (P5CDD), hexachlorinated dibenzo-p-dioxins (H6CDD), heptachlorinated dibenzo-p-dioxins (H7CDD), and octachlorinated dibenzo-p-dioxins (OCDD) were studied in interaction with two cyclodextrins, β-CD and γ-CD, resulting in a total of 40 host-guest complexes. The flexibility of the cyclodextrins was given by the number of glucose units, and the placement of the chlorine groups on the dioxins structure accounted for the different complex formed. Various geometries of interaction obtained by guided docking were studied, and the complexation and binding energy were calculated in the frame of MM+ and OPLS force fields. The results show that the recognition of the PCDD pollutants by the CD may be possible through the formation of PCDD:CD inclusion complexes. This recognition is based on the formation of Coulombic interactions between the chlorine atom of the PCDD and the primary and secondary hydroxyl groups of the CD and van der Waals interaction of the CD hydrophobic cavity with PCDD aromatic structures. Both MM+ and OPLS calculus resulted in close values for the complexation and binding energies. Molecular mechanics calculations offer a proper insight into the molecular recognition process between the PCDD compounds and CD molecules, proved by a good description of the C-H···O bonds formed between the guest and host molecules. It was shown for the first time that CD may efficiently trap PCCDs, opening the way for their tremendous potential use in environmental remediation.
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Affiliation(s)
- Maria-Cristina Ghetu
- Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Bd., 030018 Bucharest, Romania
- Horia Hulubei National Institute of Research and Development for Physics and Nuclear Engineering, 30 Reactorului Str., 077125 Magurele, Romania;
| | - Marian Virgolici
- Horia Hulubei National Institute of Research and Development for Physics and Nuclear Engineering, 30 Reactorului Str., 077125 Magurele, Romania;
| | - Alina Tirsoaga
- Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Bd., 030018 Bucharest, Romania
| | - Ioana Stanculescu
- Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Bd., 030018 Bucharest, Romania
- Horia Hulubei National Institute of Research and Development for Physics and Nuclear Engineering, 30 Reactorului Str., 077125 Magurele, Romania;
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Cosma DV, Tudoran C, Coroș M, Socaci C, Urda A, Turza A, Roșu MC, Barbu-Tudoran L, Stanculescu I. Modification of Cotton and Leather Surfaces Using Cold Atmospheric Pressure Plasma and TiO 2-SiO 2-Reduced Graphene Oxide Nanopowders. Materials (Basel) 2023; 16:1397. [PMID: 36837027 PMCID: PMC9967795 DOI: 10.3390/ma16041397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/01/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
Surface modification of textile fabrics and leathers is very versatile and allows the products quality improvement. In this work, cotton and leather substrates were pre-treated with cold atmospheric pressure plasma (CAPP) and further coated with TiO2-SiO2-reduced graphene oxide composites in dispersion form. By using a Taguchi scheme, this research evaluated the effect of three significant parameters, i.e., the pre-treatment with CAPP, organic dispersion coating and TiO2-SiO2-reduced graphene oxide (TS/GR) composites, that may affect the morpho-structural properties and photocatalytic activity of modified cotton and leather surfaces. The characteristics of cotton/leather surfaces were evaluated by morphological, structural, optical and self-cleaning ability using scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX), X-ray powder diffraction (XRD), attenuated total reflection-Fourier Transform Infrared spectroscopy (ATR-FTIR) and UV-Vis spectroscopy. The self-cleaning performance of the obtained cotton and leather samples was evaluated by photocatalytic discoloration of berry juice surface stains under UV light irradiation for 12 h. The successfulness of coating formulations was proven by the SEM analysis and UV-Vis spectroscopy. The XRD patterns and ATR-FTIR spectra revealed the cellulose and collagen structures as dominant components of cotton and leather substrates. The CAPP treatment did not damage the cotton and leather structures. The photocatalytic results highlighted the potential of TiO2-SiO2-reduced graphene oxide composites in organic dispersion media, as coating formulations, for further use in the fabrication of innovative self-cleaning photocatalytic cotton and leather products.
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Affiliation(s)
- Dragoș-Viorel Cosma
- Department of Mass Spectrometry, Chromatography and Applied Physics, National Institute for Research and Development of Isotopic and Molecular Technologies (INCDTIM), 67-103 Donat Street, 400293 Cluj-Napoca, Romania
| | - Cristian Tudoran
- Cetatea, National Institute for Research and Development of Isotopic and Molecular Technologies (INCDTIM), 67-103 Donat Street, 400293 Cluj-Napoca, Romania
| | - Maria Coroș
- Department of Mass Spectrometry, Chromatography and Applied Physics, National Institute for Research and Development of Isotopic and Molecular Technologies (INCDTIM), 67-103 Donat Street, 400293 Cluj-Napoca, Romania
| | - Crina Socaci
- Department of Mass Spectrometry, Chromatography and Applied Physics, National Institute for Research and Development of Isotopic and Molecular Technologies (INCDTIM), 67-103 Donat Street, 400293 Cluj-Napoca, Romania
| | - Alexandra Urda
- Department of Mass Spectrometry, Chromatography and Applied Physics, National Institute for Research and Development of Isotopic and Molecular Technologies (INCDTIM), 67-103 Donat Street, 400293 Cluj-Napoca, Romania
| | - Alexandru Turza
- Department of Mass Spectrometry, Chromatography and Applied Physics, National Institute for Research and Development of Isotopic and Molecular Technologies (INCDTIM), 67-103 Donat Street, 400293 Cluj-Napoca, Romania
| | - Marcela-Corina Roșu
- Department of Mass Spectrometry, Chromatography and Applied Physics, National Institute for Research and Development of Isotopic and Molecular Technologies (INCDTIM), 67-103 Donat Street, 400293 Cluj-Napoca, Romania
| | - Lucian Barbu-Tudoran
- Electron Microscopy Center “Prof. C. Crăciun”, Faculty of Biology & Geology, “Babeș-Bolyai” University, 5-7 Clinicilor Street, 400006 Cluj-Napoca, Romania
- Electron Microscopy Integrated Laboratory, National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat Street, 400293 Cluj-Napoca, Romania
| | - Ioana Stanculescu
- Analytical Chemistry and Physical Chemistry Department, Faculty of Chemistry, University of Bucharest, Regina Elisabeta, no. 4-12, 030018 Bucharest, Romania
- Horia Hulubei National Institute of Research and Development for Physics and Nuclear Engineering, 30 Reactorului Str., 077125 Magurele, Romania
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Bala D, Matei I, Ionita G, Cosma DV, Rosu MC, Stanca M, Gaidau C, Baleanu M, Virgolici M, Stanculescu I. Luminescence, Paramagnetic, and Electrochemical Properties of Copper Oxides-Decorated TiO 2/Graphene Oxide Nanocomposites. Int J Mol Sci 2022; 23:ijms232314703. [PMID: 36499031 PMCID: PMC9735503 DOI: 10.3390/ijms232314703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/21/2022] [Accepted: 11/23/2022] [Indexed: 11/27/2022] Open
Abstract
The properties of newly synthesized Cu2O/CuO-decorated TiO2/graphene oxide (GO) nanocomposites (NC) were analyzed aiming to obtain insight into their photocatalytic behavior and their various applications, including water remediation, self-cleaning surfaces, antibacterial materials, and electrochemical sensors. The physico-chemical methods of research were photoluminescence (PL), electron paramagnetic resonance (EPR) spectroscopy, cyclic voltammetry (CV), and differential pulse voltammetry (DPV). The solid samples evidenced an EPR signal that can be attributed to the oxygen-vacancy defects and copper ions in correlation with PL results. Free radicals generated before and after UV-Vis irradiation of powders and aqueous dispersions of Cu2O/CuO-decorated TiO2/GO nanocomposites were studied by EPR spectroscopy using two spin traps, DMPO (5,5-dimethyl-1-pyrroline-N-oxide) and CPH (1-hydroxy-3-carboxy-2,2,5,5-tetramethylpyrrolidine), to highlight the formation of hydroxyl and superoxide reactive oxygen species, respectively. The electrochemical characterization of the NC modified carbon-paste electrodes (CPE) was carried out by CV and DPV. As such, modified carbon-paste electrodes were prepared by mixing carbon paste with copper oxides-decorated TiO2/GO nanocomposites. We have shown that GO reduces the recombination process in TiO2 by immediate electron transfer from excited TiO2 to GO sheets. The results suggest that differences in the PL, respectively, EPR data and electrochemical behavior, are due to the different copper oxides and GO content, presenting new perspectives of materials functionalization.
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Affiliation(s)
- Daniela Bala
- Physical Chemistry Department, Faculty of Chemistry, University of Bucharest, Regina Elisabeta, No. 4-12, 030018 Bucharest, Romania
| | - Iulia Matei
- “Ilie Murgulescu” Institute of Physical Chemistry, 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Gabriela Ionita
- “Ilie Murgulescu” Institute of Physical Chemistry, 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Dragos-Viorel Cosma
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67–103 Donat Street, 400293 Cluj-Napoca, Romania
| | - Marcela-Corina Rosu
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67–103 Donat Street, 400293 Cluj-Napoca, Romania
| | - Maria Stanca
- Leather Research Department, National Institute for Textiles and Leather, Division Leather and Footwear Research Institute (ICPI), 93 Ion Minulescu Street, 031215 Bucharest, Romania
| | - Carmen Gaidau
- Leather Research Department, National Institute for Textiles and Leather, Division Leather and Footwear Research Institute (ICPI), 93 Ion Minulescu Street, 031215 Bucharest, Romania
| | - Maria Baleanu
- Horia Hulubei National Institute of Research and Development for Physics and Nuclear Engineering, 30 Reactorului Str., 077125 Magurele, Romania
| | - Marian Virgolici
- Horia Hulubei National Institute of Research and Development for Physics and Nuclear Engineering, 30 Reactorului Str., 077125 Magurele, Romania
| | - Ioana Stanculescu
- Physical Chemistry Department, Faculty of Chemistry, University of Bucharest, Regina Elisabeta, No. 4-12, 030018 Bucharest, Romania
- Horia Hulubei National Institute of Research and Development for Physics and Nuclear Engineering, 30 Reactorului Str., 077125 Magurele, Romania
- Correspondence:
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Soare AC, Meltzer V, Colbea C, Stanculescu I, Pincu E. Compatibility of Drotaverine Hydrochloride with Ibuprofen and Ketoprofen Nonsteroidal Anti-Inflammatory Drugs Mixtures. Materials (Basel) 2022; 15:ma15031244. [PMID: 35161188 PMCID: PMC8838396 DOI: 10.3390/ma15031244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 02/03/2022] [Accepted: 02/06/2022] [Indexed: 02/04/2023]
Abstract
Formulations with two or more active pharmaceutical ingredients (APIs) are a researched trend due to their convenient use compared with multiple medications. Moreover, drug-drug combinations may have a synergistic effect. Drotaverine hydrochloride (D-HCl) is commonly used for its antispasmodic action. The combination of a spasmolytic and an analgesic drug such as ibuprofen (Ibu) or ketoprofen (Ket) could become the answer for the treatment of localized pain. D-HCl:Ibu and D-HCl:Ket drug-drug interactions leading to the formation of eutectic compositions with increased bioavailability, obtained by mechanosynthesis, a green, solvent-free method was explored for the first time. The compatibility of Ibuprofen, Ketoprofen, and Drotaverine Hydrochloride was investigated using differential scanning calorimetry (DSC), X-ray diffraction (XRD), and Fourier-Transform Infrared spectroscopy (FTIR). Solid-liquid equilibrium (SLE) phase diagrams for the binary systems of active pharmaceutical ingredients were developed and the Tammann diagrams were designed to determine the eutectic compositions. The excess thermodynamic functions GE for the pre-, post-, and eutectic compositions were obtained using the computed activity coefficients data. Results show that drotaverine-based pharmaceutical forms for pain treatment may be obtained at 0.9 respectively 0.8 molar fractions of ibuprofen and ketoprofen which is advantageous because the maximum allowed daily dose of Ibu is about 6 times higher than those of D-HCl and Ket. The obtained eutectics may be a viable option for the treatment of pain associated with cancer therapy.
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Marin NM, Stanculescu I. Application of Amberlite IRA 402 Resin Adsorption and Laccase Treatment for Acid Blue 113 Removal from Aqueous Media. Polymers (Basel) 2021; 13:polym13223991. [PMID: 34833290 PMCID: PMC8621439 DOI: 10.3390/polym13223991] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/11/2021] [Accepted: 11/15/2021] [Indexed: 11/16/2022] Open
Abstract
Despite Acid Blue 113 (AB 113)'s extensive use and negative environmental impact, very few studies have focused on its efficient and environmentally friendly removal. This research aims the removal of AB 113 from environmental aqueous media and its consequent enzymatic biodegradation. A strongly basic anion exchange resin in Cl- form, Amberlite IRA 402 (IRA 402(Cl-)) was used for AB 113 adsorption and a laccase was used to further biodegrade it. For the first time, two novel, efficient and environmentally friendly physical-chemical and biological assays for AB 113 wastewater removal and subsequent biodegradation were combined. The adsorption of AB 113 onto IRA 402(Cl-) was tested in batch and continuous flux modes. Influence of contact time, concentration and desorption in acidic media were evaluated. The kinetic data were best modulated by the Lagergren model with R2 = 0.9275. The Langmuir isotherm model best fitted the experimental data, and the maximum adsorption capacity was 130 mg/g. Dye, resin and AB113 loaded resin were characterized by thermogravimetry and FTIR to evaluate their physical chemical properties modification. Based on the performed studies, a consecutive methodology is proposed, incorporating the ion exchange process in the first stage and the biodegradation process in the second. Thus, in the second stage the residual concentration of AB 113 is reduced by an efficient bio-degradation process produced by the laccase at pH = 4.
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Affiliation(s)
- Nicoleta Mirela Marin
- National Research and Development Institute for Industrial Ecology ECOIND, Street Podu Dambovitei No. 57-73, District 6, 060652 Bucharest, Romania
- Correspondence: (N.M.M.); (I.S.)
| | - Ioana Stanculescu
- Department of Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Bd., 030018 Bucharest, Romania
- Horia Hulubei National Institute for Physics and Nuclear Engineering, IRASM, 30 Aleea Reactorului, 077125 Magurele, Romania
- Faculty of Applied Sciences, Reactor Institute Delft, TU Delft, Mekelweg 15, 2629 JB Delft, The Netherlands
- Correspondence: (N.M.M.); (I.S.)
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Stanca M, Gaidau C, Alexe CA, Stanculescu I, Vasilca S, Matei A, Simion D, Constantinescu RR. Multifunctional Leather Surface Design by Using Carbon Nanotube-Based Composites. Materials (Basel) 2021; 14:3003. [PMID: 34206068 PMCID: PMC8199507 DOI: 10.3390/ma14113003] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/14/2021] [Accepted: 05/24/2021] [Indexed: 12/26/2022]
Abstract
This paper deals with original research in smart leather surface design for the development of multifunctional properties by using multi-walled carbon nanotube (MWCNT)-based nanocomposites. The conductive properties were demonstrated for both sheepskin and bovine leather surfaces for 0.5% MWCNTs in finishing nanocompositions with prospects for new material design intended for flexible electronics or multifunctional leathers. The photocatalytic properties of bovine leather surface treated with 0.5% MWCNTs were shown against an olive oil stain after visible light exposure and were attributed to reactive oxygen species generation and supported by contact angle measurements in dynamic conditions. The volatile organic compounds' decomposition and antibacterial tests confirmed the self-cleaning experimental conclusions. Ultraviolet protection factor had excellent values for leather surfaces treated with multi-walled carbon nanotube and the fastness resistance tests showed improved performance compared to control samples. Scanning electron microscopy with energy dispersive X-ray (SEM-EDX), X-ray photoelectron spectroscopy (XPS), and attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy analysis confirmed the influence of different leather surfaces on MWCNT dispersion with an effect on nanoparticle reactivity and efficiency in self-cleaning properties. Multifunctional leather surfaces were designed and demonstrated through MWCNT-based nanocomposite use under conventional finishing conditions.
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Affiliation(s)
- Maria Stanca
- Research and Development National Institute for Textiles and Leather, Division Leather and Footwear Research Institute, Leather Research Department, 93, Ion Minulescu Str., 031215 Bucharest, Romania; (M.S.); (C.-A.A.); (D.S.); (R.-R.C.)
| | - Carmen Gaidau
- Research and Development National Institute for Textiles and Leather, Division Leather and Footwear Research Institute, Leather Research Department, 93, Ion Minulescu Str., 031215 Bucharest, Romania; (M.S.); (C.-A.A.); (D.S.); (R.-R.C.)
| | - Cosmin-Andrei Alexe
- Research and Development National Institute for Textiles and Leather, Division Leather and Footwear Research Institute, Leather Research Department, 93, Ion Minulescu Str., 031215 Bucharest, Romania; (M.S.); (C.-A.A.); (D.S.); (R.-R.C.)
| | - Ioana Stanculescu
- Horia Hulubei National Institute for Physics and Nuclear Engineering, 30 Aleea Reactorului, 077125 Magurele, Ilfov, Romania; or
- Department of Physical Chemistry, University of Bucharest, 4–12 Regina Elisabeta Bd., 030018 Bucharest, Romania
| | - Silvana Vasilca
- Horia Hulubei National Institute for Physics and Nuclear Engineering, 30 Aleea Reactorului, 077125 Magurele, Ilfov, Romania; or
- Department of Analytical Chemistry Faculty of Chemistry, University of Bucharest, 90–92 Panduri Ave., 050067 Bucharest, Romania
| | - Andreea Matei
- INFLPR–National Institute for Laser, Plasma and Radiation Physics, 077125 Magurele, Ilfov, Romania;
| | - Demetra Simion
- Research and Development National Institute for Textiles and Leather, Division Leather and Footwear Research Institute, Leather Research Department, 93, Ion Minulescu Str., 031215 Bucharest, Romania; (M.S.); (C.-A.A.); (D.S.); (R.-R.C.)
| | - Roxana-Rodica Constantinescu
- Research and Development National Institute for Textiles and Leather, Division Leather and Footwear Research Institute, Leather Research Department, 93, Ion Minulescu Str., 031215 Bucharest, Romania; (M.S.); (C.-A.A.); (D.S.); (R.-R.C.)
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Marin NM, Dinu L, Stanculescu I, Cristea NI, Ionescu AI. Maize Stalk Material for On-Site Treatment of Highly Polluted Leachate and Mine Wastewater. Materials (Basel) 2021; 14:956. [PMID: 33670485 PMCID: PMC7922871 DOI: 10.3390/ma14040956] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/02/2021] [Accepted: 02/16/2021] [Indexed: 11/20/2022]
Abstract
New research applications involving the use of cellulosic material derived from maize stalk for on-site treatment of leachate were evaluated for specific removal of Cu(II) and Fe(III) from real, highly polluted tailing pond and mine wastewater samples. Two major issues generated by anthropic mining activities were also tackled: wastewater metal content decrease to improve water quality and subsequently metal specific recovery, increasing the economic efficiency of metal production by using a green technology for residual management. Rapid saturation of the maize stalk mass determined in batch studies and the mine pilot experiment led to diminished metal concentrations in the second pilot experiment, where Cu(II) and Pb(II) from synthetic solutions were monitored in order to test biomaterial performances. In addition, in the second pilot experiment, maize stalk removed Pb(II) in the first 36 h, below the determination limit of the analytical method. The biomaterial bed in the column was saturated after 252 h of inflow solution. FTIR-ATR, TG and SEM techniques probed the interaction between maize stalk polar groups C=O, -OH, C-O and tailing water metallic ions by large FTIR band displacements, intensity decrease and shape changes, modification of thermal stability and by changes in the appearance of adsorbent microstructure images owing mainly to ion exchange mechanism.
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Affiliation(s)
- Nicoleta Mirela Marin
- National Research and Development Institute for Industrial Ecology ECOIND, Street Podu Dambovitei no. 71-73, District 6, 060652 Bucharest, Romania; (L.D.); (N.I.C.); (A.I.I.)
| | - Laurentiu Dinu
- National Research and Development Institute for Industrial Ecology ECOIND, Street Podu Dambovitei no. 71-73, District 6, 060652 Bucharest, Romania; (L.D.); (N.I.C.); (A.I.I.)
| | - Ioana Stanculescu
- Department of Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Bd., 030018 Bucharest, Romania
- Horia Hulubei National Institute for Physics and Nuclear Engineering, Centre of Technological Irradiations IRASM, 30 Aleea Reactorului, 077125 Magurele, Romania
| | - Nicolae Ionut Cristea
- National Research and Development Institute for Industrial Ecology ECOIND, Street Podu Dambovitei no. 71-73, District 6, 060652 Bucharest, Romania; (L.D.); (N.I.C.); (A.I.I.)
| | - Alexandra Ioana Ionescu
- National Research and Development Institute for Industrial Ecology ECOIND, Street Podu Dambovitei no. 71-73, District 6, 060652 Bucharest, Romania; (L.D.); (N.I.C.); (A.I.I.)
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Marin NM, Batrinescu G, Stanculescu I, Constantin L, Cristea NI, Ionescu AI, Traistaru GA. Experimental Model for Cu(II) and Fe(III) Sorption from Synthetic Solutions Based on Maize Stalk. Rev Chim 2020. [DOI: 10.37358/rc.20.6.8202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
This study is based to a new concept, to use maize stalk for specific sorption and recovery of Cu(II) and Fe(III) from synthetic solutions. Thus, the sorption properties of the biomass resulting from the recycling of the maize stalk that reached maturity (autumn) were studied. In the first stage, the sorption properties of the maize stalk were evaluated in batch system. Moreover, in terms of water quality improvement several key parameters that influence the sorption equilibrium were evaluated. The effect of contact time (0-120min) and cations initial concentration (investigated range: 0.05-0.4 mg/L) on biomaterial sorption capacity were assessed. Kinetic studies were performed taking into consideration the initial concentration of metallic cation. The experimental data were analyzed based on first order kinetic model, pseudo-second-kinetic model and Morris Webber kinetic model. The kinetics of sorption was in accordance with the pseudo - second - kinetic model as the correlation coefficients showed (R2=0.9940 for Cu(II) and R2=0.9999 for Fe(III)). Moreover the desorption study was evaluated with hydrochloric acid and have detected to be 63% and 89% for Cu(II) and Fe(III) when 4M HCl is used. The surface of the maize stalk loaded with Cu(II) and Fe(III) was characterized by various specific techniques such as FTIR-ATR, SEM, and TG. Experimental results revealed that cations sorption process takes place on the sorbent surface. The sorption rate of each metallic cation is controlled by the formation of chemical bonds with surface polar groups. Their presence on biomass structure, evidenced by FTIR-ATR analysis, explains the behavior of maize stalk as a weak ion exchanger acid.
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Moise V, Stanculescu I, Vasilca S, Cutrubinis M, Pincu E, Oancea P, Raducan A, Meltzer V. Consolidation of very degraded cultural heritage wood artefacts using radiation curing of polyester resins. Radiat Phys Chem Oxf Engl 1993 2019. [DOI: 10.1016/j.radphyschem.2018.11.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Chirila L, Popescu A, Cutrubinis M, Stanculescu I, Moise VI. The influence of gamma irradiation on natural dyeing properties of cotton and flax fabrics. Radiat Phys Chem Oxf Engl 1993 2018. [DOI: 10.1016/j.radphyschem.2017.12.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Marin NM, Pascu LF, Stanculescu I, Iordache O, Jianu D, Petrescu L, Badea IA. Maize Stalk as Natural Ion Exchanger for Hazardous Pollutants. Rev Chim 2017. [DOI: 10.37358/rc.17.8.5753] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
This paper recommends maize stalk as a cheap natural ion exchanger. Ion exchange equilibrium was studied using thermodynamic and kinetic models. The results showed a high selectivity towards cationic species of antimony (III), molybdenum (VI), lead (II) and arsenium (III). Waste waters and sediments from tailing ponds samples were analysed.
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Florea-Spiroiu M, Achimescu D, Stanculescu I, Purica M, Gavrila R, Peretz S. Anti-fog chitosan/sodium lauryl ether sulfate films. Polym Bull (Berl) 2013. [DOI: 10.1007/s00289-013-1023-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Thevand A, Stanculescu I, Mandravel C, Woisel P, Surpateanu G. Total assignment and structure in solution of tetrandrine by NMR spectroscopy and molecular modelling. Spectrochim Acta A Mol Biomol Spectrosc 2004; 60:1825-30. [PMID: 15248956 DOI: 10.1016/j.saa.2003.09.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2003] [Revised: 09/08/2003] [Accepted: 09/11/2003] [Indexed: 05/18/2023]
Abstract
High-resolution 1- and 2D NMR spectra of tetrandrine and molecular modelling were employed to characterise its structure in solution. Complete and unambiguous assignment of all proton and carbon resonance signals is reported. Scalar couplings were determined from dihedral angles with the Karplus equation. Inter-proton distances were evaluated from NOE correlation peaks. Comparison of simulated and X-ray conformations of tetrandrine reveals only small differences.
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Affiliation(s)
- André Thevand
- UMR 6633, Spectrométries et Dynamique Moléculaire, Université de Provence, Campus de Saint-Jérôme, Case 252, F13397 Marseille 20, France
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Stanculescu I, Mandravel C, Delattre F, Landy D, Woisel P, Surpateanu G. Cation binding characteristics of tetrandrine studied by UV-Vis absorption and fluorescence spectroscopies. J Photochem Photobiol A Chem 2003. [DOI: 10.1016/s1010-6030(03)00268-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Stanculescu I, Mandravel C, Landy D, Woisel P, Surpateanu G. Complexation of tetrandrine with calcium ion probed by various spectroscopic methods and molecular modeling. J Mol Struct 2003. [DOI: 10.1016/s0022-2860(03)00216-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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