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Zhao Y, Zhang P, Zhang W, Fan Y. Study on Flocculation Behavior of Cr(VI) Using a Novel Chitosan Functionalized with Thiol Groups. Polymers (Basel) 2023; 15:polym15051117. [PMID: 36904363 PMCID: PMC10007017 DOI: 10.3390/polym15051117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/12/2023] [Accepted: 02/14/2023] [Indexed: 02/25/2023] Open
Abstract
In this study, CTS-GSH was prepared by grafting thiol (-SH) groups onto chitosan (CTS), which was characterized through Fourier Transform Infrared (FT-IR) spectra, Scanning Electron Microscopy (SEM) and Differential Thermal Analysis-Thermogravimetric Analysis (DTA-TG). The performance of CTS-GSH was evaluated by measuring Cr(VI) removal efficiency. The -SH group was successfully grafted onto CTS, forming a chemical composite, CTS-GSH, with a rough, porous and spatial network surface. All of the molecules tested in this study were efficient at removing Cr(VI) from the solution. The more CTS-GSH added, the more Cr(VI) removed. When a suitable dosage of CTS-GSH was added, Cr(VI) was almost completely removed. The acidic environment at pH 5-6 was beneficial for the removal of Cr(VI), and at pH 6, the maximum removal efficiency was achieved. Further experimentation showed that with 100.0 mg/L CTS-GSH for the disposal of 5.0 mg/L Cr(VI) solution, the removal rate of Cr(VI) reached 99.3% with a slow stirring time of 8.0 min and sedimentation time of 3 h; the presence of four common ions, including Mg2+, Ca2+, SO42- and CO32-, had an inhibitory effect on CTS-GSH's ability to remove Cr(VI) from the aqueous solution, and more CTS-GSH was needed to reduce this inhibiting action. Overall, CTS-GSH exhibited good results in Cr(VI) removal, and thus has good potential for the further treatment of heavy metal wastewater.
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Affiliation(s)
- Yuelong Zhao
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 411201, China
| | - Peng Zhang
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 411201, China
- Upgrading Office of Modern College of Humanities and Sciences of Shanxi Normal University, Linfen 041000, China
- College of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
- Correspondence: (P.Z.); (W.Z.)
| | - Wei Zhang
- College of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
- College of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, China
- Correspondence: (P.Z.); (W.Z.)
| | - Yali Fan
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 411201, China
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2
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A theoretical approach on the ability of functionalized gold nanoparticles for detection of Cd 2. Sci Rep 2021; 11:23422. [PMID: 34873260 PMCID: PMC8648727 DOI: 10.1038/s41598-021-02933-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 11/24/2021] [Indexed: 12/24/2022] Open
Abstract
Cadmium (Cd) as a toxic element that is widely present in water, soil, and air has important effects on human health, therefore proposing an accurate and selective method for detection of this element is of importance. In this article, by employing full atomistic molecular dynamics (MD) simulations and density functional theory dispersion corrected (DFT-D3) calculations, the effects of 6-mercaptonicotinic acid (MNA) and L-cysteine (CYS) on the stability of gold nanoparticles (AuNPs) and their sensitivity against Cd2+ were investigated. The obtained results indicate that pure AuNPs are not stable in water, while functionalized AuNPs with CYS and MNA groups have considerable stability without aggregation. In other words, the functional groups on the surface of AuNPs elevate their resistance against aggregation by an increase in the repulsive interactions between the gold nanoparticles. Moreover, functionalized AuNPs have considerable ability for selective detection of Cd2+ in the presence of different metal ions. Based on the MD simulation results, MNA-CYS-AuNPs (functionalized AuNPs with both functional groups) have the maximum sensitivity against Cd2+ in comparison with MNA-AuNPs and CYS-AuNPs due to the strong electrostatic interactions. DFT-D3 calculations reveal that the most probable interactions between the metal ions and functional groups are electrostatic, and Cd2+ can aggregate functionalized AuNPs due to strong electrostatic interactions with MNA and CYS groups. Moreover, charge transfer and donor-acceptor analyses show that molecular orbital interactions between the functional groups and Cd2+ can be considered as the driving force for AuNPs aggregation. A good agreement between the theoretical results and experimental data confirms the importance of the molecular modeling methods as a fast scientific protocol for designing new functionalized nanoparticles for application in different fields.
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Shi Y, Liao X, Chen R, Ge Q. pH-Responsive Polyoxometalates that Achieve Efficient Wastewater Reclamation and Source Recovery via Forward Osmosis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:12664-12671. [PMID: 34494436 DOI: 10.1021/acs.est.1c04245] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Forward osmosis (FO) has been increasingly used for water treatment. However, the lack of suitable draw solutes impedes its further development. Herein, we design pH-responsive polyoxometalates, that is, (NH4)6Mo7O24 and Na6Mo7O24, as draw solutes for simultaneous water reclamation and resource recovery from wastewater via FO. Both polyoxometalates have a cage-like configuration and release multiple ionic species in water. These characteristics allow them to generate high osmotic pressures to drive the FO separation efficiently with negligible reverse solute diffusion. (NH4)6Mo7O24 and Na6Mo7O24 at a dilute concentration (0.4 M) produce water fluxes of 16.4 LMH and 14.2 LMH, respectively, against DI water, outperforming the frequently used commercial NaCl and NH4HCO3 draw solutes, and other synthetic materials. With an average water flux of 10.0 LMH, (NH4)6Mo7O24 reclaims water from the simulated glutathione-containing wastewater more efficiently than Na6Mo7O24 (9.1 LMH), NaCl (3.3 LMH), and NH4HCO3 (5.6 LMH). The final glutathione treated with (NH4)6Mo7O24 and Na6Mo7O24 remains intact but that treated with NaCl and NH4HCO3 is either denatured or contaminated owing to their severe leakage in FO. Remarkably, both polyoxometalates are readily recycled by pH regulation and reused for FO. Polyoxometalate is thus proven to be an appropriate candidate for FO separation in wastewater reclamation and resource recovery.
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Affiliation(s)
- Yiru Shi
- College of Environment and Safety Engineering, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, Fujian 350116, China
| | - Xialu Liao
- College of Environment and Safety Engineering, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, Fujian 350116, China
| | - Rongzhen Chen
- College of Environment and Safety Engineering, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, Fujian 350116, China
| | - Qingchun Ge
- College of Environment and Safety Engineering, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, Fujian 350116, China
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4
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Alirezapour F, Khanmohammadi A. Theoretical study on the interaction of phenylalaninal with group
IA
(Li
+
, Na
+
, K
+
) and
IIA
(Be
2+
, Mg
2+
, Ca
2+
) metal cations. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202000383] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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5
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Khavani M, Izadyar M, Housaindokht MR. A molecular approach on the ability of functionalized gold nanoparticles for selective sensing of Hg2+. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111461] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Molecular structure, QTAIM and bonding character of cation–π interactions of mono- and divalent metal cations (Li+, Na+, K+, Be2+, Mg2+ and Ca2+) with drug of acetaminophen. Theor Chem Acc 2019. [DOI: 10.1007/s00214-019-2492-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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7
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Khavani M, Izadyar M, Housaindokht MR. A combined MD/QM study on the sensing mechanism of Pb2+ by glutathione functionalized gold nanoparticles. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.02.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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8
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Nedjoua D, Krallafa AM. Temperature effect on the structure and conformational fluctuations in two zinc knuckles from the mouse mammary tumor virus. Comput Biol Chem 2018; 74:86-93. [PMID: 29567490 DOI: 10.1016/j.compbiolchem.2018.03.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 10/28/2017] [Accepted: 03/07/2018] [Indexed: 11/18/2022]
Abstract
Zinc fingers are small protein domains in which zinc plays a structural role, contributing to the stability of the zinc-peptide complex. Zinc fingers are structurally diverse and are present in proteins that perform a broad range of functions in various cellular processes, such as replication and repair, transcription and translation, metabolism and signaling, cell proliferation, and apoptosis. Zinc fingers typically function as interaction modules and bind to a wide variety of compounds, such as nucleic acids, proteins, and small molecules. In this study, we investigated the structural properties, in solution, of the proximal and distal zinc knuckles of the nucleocapsid (NC) protein from the mouse mammary tumor virus (MMTV) (MMTV NC). For this purpose, we performed a series of molecular dynamics simulations in aqueous solution at 300 K, 333 K, and 348 K. The temperature effect was evaluated in terms of root mean square deviation of the backbone atoms and root mean square fluctuation of the coordinating residue atoms. The stability of the zinc coordination sphere was analyzed based upon the time profile of the interatomic distances between the zinc ions and the chelator atoms. The results indicate that the hydrophobic character of the proximal zinc finger is dominant at 333 K. The low mobility of the coordinating residues suggests that the strong electrostatic effect exerted by the zinc ion on its coordinating residues is not influenced by the increase in temperature. The evolution of the structural parameters of the coordination sphere of the distal zinc finger at 300 K gives us a reasonable picture of the unfolding pathway, as proposed by Bombarda and coworkers (Bombarda et al., 2005), which can predict the binding order of the four conserved ligand-binding residues. Our results support the conclusion that the structural features can vary significantly between the two zinc knuckles of MMTV NC.
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Affiliation(s)
- Drici Nedjoua
- LCPM, Department of Chemistry, University of Oran 1 Ahmed Benbella, PO Box 1524, El m'naouer, Oran, 31000, Algeria.
| | - Abdelghani Mohamed Krallafa
- LCPM, Department of Chemistry, University of Oran 1 Ahmed Benbella, PO Box 1524, El m'naouer, Oran, 31000, Algeria.
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9
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Gold nanoparticle-based colorimetric sensing of dipicolinic acid from complex samples. Anal Bioanal Chem 2018; 410:1805-1815. [DOI: 10.1007/s00216-017-0836-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 11/24/2017] [Accepted: 12/15/2017] [Indexed: 12/29/2022]
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10
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Quasi-solid-state dye-sensitized solar cell based on gel electrolyte with high gel to solution transition temperature using low molecular mass organogelator. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.05.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Lauwers K, Breynaert E, Rombouts I, Delcour JA, Kirschhock CEA. Water electrolyte promoted oxidation of functional thiol groups. Food Chem 2016; 197 Pt B:1235-9. [PMID: 26675862 DOI: 10.1016/j.foodchem.2015.11.075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 11/12/2015] [Accepted: 11/13/2015] [Indexed: 10/22/2022]
Abstract
The formation of disulfide bonds is of the utmost importance for a wide range of food products with gluten or globular proteins as functional agents. Here, the impact of mineral electrolyte composition of aqueous solutions on thiol oxidation kinetics was studied, using glutathione (GSH) and cysteine (CYS) as model systems. Interestingly, the oxidation rate of both compounds into their corresponding disulfides was significantly higher in common tap water than in ultrapure water. The systematic study of different electrolyte components showed that especially CaCl2 improved the oxidation rate of GSH. However, this effect was not observed for CYS, which indicated a strong impact of the local chemical environment on thiol oxidation kinetics.
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Affiliation(s)
- K Lauwers
- KULeuven, Center for Surface Chemistry and Catalysis, Department of Microbial and Molecular Systems, Celestijnenlaan 200f, B-3001 Leuven, Belgium
| | - E Breynaert
- KULeuven, Center for Surface Chemistry and Catalysis, Department of Microbial and Molecular Systems, Celestijnenlaan 200f, B-3001 Leuven, Belgium.
| | - I Rombouts
- KULeuven, Laboratory of Food Chemistry and Biochemistry and Leuven Food Science and Nutrition Research Centre (LFoRCe), Kasteelpark Arenberg 20, B-3001 Leuven, Belgium
| | - J A Delcour
- KULeuven, Laboratory of Food Chemistry and Biochemistry and Leuven Food Science and Nutrition Research Centre (LFoRCe), Kasteelpark Arenberg 20, B-3001 Leuven, Belgium
| | - C E A Kirschhock
- KULeuven, Center for Surface Chemistry and Catalysis, Department of Microbial and Molecular Systems, Celestijnenlaan 200f, B-3001 Leuven, Belgium
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12
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DFT study on foscarnet as an antiviral drug: Conformer analysis, gas phase acidity, metal ion affinity and influence of metal complexation on gas phase acidity. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.09.075] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Ponikvar-Svet M, Zeiger DN, Keating LR, Liebman JF. Interplay of thermochemistry and structural chemistry, the journal (volume 24, 2013, issues 1–2) and the discipline. Struct Chem 2013. [DOI: 10.1007/s11224-013-0358-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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