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Saravanan V, Davoodbasha M, Rajesh A, Nooruddin T, Lee SY, Kim JW. Extraction and characterization of Chitosan from Shell of Borassus flabellifer and their antibacterial and antioxidant applications. Int J Biol Macromol 2023; 253:126592. [PMID: 37659486 DOI: 10.1016/j.ijbiomac.2023.126592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 08/26/2023] [Accepted: 08/27/2023] [Indexed: 09/04/2023]
Abstract
Chitosan is a bio-polymer made up of repeating units of N-acetyl glucosamine and glucosamine joined together by (1-4)-glycosidic linkages. Various bioresources have been used to develop bioactive materials that have a wide range of applications in different fields, including industry and medicine. Borassus flabellifer is a well-known source of chitin in the sub-Indian continent and is used in digestion, pharmaceuticals, and other applications. Chitin can be extracted from B. flabellifer fruit shells through demineralization and deproteinization and then converted into chitosan through deacetylation. This study aimed to investigate the biological activity of chitosan extracted from B. flabellifer fruit shells and to analyze its molecular structure using FT-IR analysis. Results showed the presence of NH, OH, and CO stretching, indicating the presence of various functional groups in chitosan. Scanning electron microscopic study revealed the topography of the chitosan. Well-diffusion and MIC tests showed that chitosan exhibited activity against E. coli and S. aureus. The chitosan extract also exhibited potential antioxidant polymer by scavenging free radicals.
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Affiliation(s)
- Vishwapriya Saravanan
- School of Life Sciences, B.S. Abdur Rahman Crescent Institute of Science and Technology, Chennai 600048, India
| | - MubarakAli Davoodbasha
- School of Life Sciences, B.S. Abdur Rahman Crescent Institute of Science and Technology, Chennai 600048, India; Centre for Surface Technology and Applications, Korea Aerospace University, Goyang 10540, Republic of Korea; Research Centre for Bio Material and Process Development, Incheon National University, Incheon 22012, Republic of Korea.
| | - Arjun Rajesh
- School of Life Sciences, B.S. Abdur Rahman Crescent Institute of Science and Technology, Chennai 600048, India; Department of Biotechnology, Northeastern University, Boston, MA 02115, USA
| | - Thajuddin Nooruddin
- School of Life Sciences, B.S. Abdur Rahman Crescent Institute of Science and Technology, Chennai 600048, India
| | - Sang-Yul Lee
- Centre for Surface Technology and Applications, Korea Aerospace University, Goyang 10540, Republic of Korea
| | - Jung-Wan Kim
- Centre for Surface Technology and Applications, Korea Aerospace University, Goyang 10540, Republic of Korea; Research Centre for Bio Material and Process Development, Incheon National University, Incheon 22012, Republic of Korea; Division of Bioengineering, Incheon National University, Incheon 22012, Republic of Korea.
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2
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Wu L, Khodadoust AP, Punia S. Removal of chromium from water using manganese (II, III) oxides coated sand: adsorption and transformation of Cr(VI) and Cr(III). ENVIRONMENTAL TECHNOLOGY 2023; 44:2113-2133. [PMID: 35042451 DOI: 10.1080/09593330.2021.2024272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 12/14/2021] [Indexed: 05/30/2023]
Abstract
A manganese coated sand (MCS) sorbent containing manganese (II,III) oxides was developed for adsorption and transformation of chromium [Cr(VI) and Cr(III)] with potential application in flow-through permeable media adsorption filters. Characterization of the MCS sorbent using XRD and XPS showed that the oxides of manganese (II) and manganese (III) were present on the MCS sorbent surface. Adsorption of both Cr(VI) and Cr(III) onto the MCS sorbent occurred over a broad pH range from 3 to 10. Surface charge analysis of the MCS sorbent determined a pHPZC of 7.8, which may facilitate the uptake of both oxy-anionic Cr(VI) species and cationic Cr(III) species. Favorable adsorption of Cr(VI) and Cr(III) onto the MCS sorbent occurred according to the Langmuir and the Freundlich adsorption equations, with a higher adsorption capacity for Cr(III) than Cr(VI). Adsorption parameters from the Langmuir, the Freundlich and the Temkin adsorption equations showed a stronger binding of Cr(VI) than Cr(III). Adsorption of Cr(III) decreased with increasing calcium concentration while adsorption of Cr(VI) decreased with increasing concentration of common anions found in natural water in the following order: phosphate > sulfate> bicarbonate. Transformation of chromium occurred on the surface of the MCS sorbent due to the partial reduction of Cr(VI) and the partial oxidation of Cr(III), which may be attributed to the role of surface manganese (II,III) oxides as either reducing or oxidizing agents. The MCS sorbent is a recyclable and sustainable adsorbent for removal of chromium from water with an environmental impact comparable to ion-exchange technology.
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Affiliation(s)
- Lisha Wu
- Department of Civil, Materials, and Environmental Engineering, University of Illinois at Chicago, Chicago, IL, USA
| | - Amid P Khodadoust
- Department of Civil, Materials, and Environmental Engineering, University of Illinois at Chicago, Chicago, IL, USA
| | - Snover Punia
- Department of Civil, Materials, and Environmental Engineering, University of Illinois at Chicago, Chicago, IL, USA
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Matias PMC, Sousa JFM, Bernardino EF, Vareda JP, Durães L, Abreu PE, Marques JMC, Murtinho D, Valente AJM. Reduced Chitosan as a Strategy for Removing Copper Ions from Water. Molecules 2023; 28:molecules28104110. [PMID: 37241851 DOI: 10.3390/molecules28104110] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/12/2023] [Accepted: 05/12/2023] [Indexed: 05/28/2023] Open
Abstract
Toxic heavy metals are priority pollutants in wastewater, commonly present in dangerous concentrations in many places across the globe. Although in trace quantities copper is a heavy metal essential to human life, in excess it causes various diseases, whereby its removal from wastewater is a necessity. Among several reported materials, chitosan is a highly abundant, non-toxic, low-cost, biodegradable polymer, comprising free hydroxyl and amino groups, that has been directly applied as an adsorbent or chemically modified to increase its performance. Taking this into account, reduced chitosan derivatives (RCDs 1-4) were synthesised by chitosan modification with salicylaldehyde, followed by imine reduction, characterised by RMN, FTIR-ATR, TGA and SEM, and used to adsorb Cu(II) from water. A reduced chitosan (RCD3), with a moderate modification percentage (43%) and a high imine reduction percentage (98%), proved to be more efficient than the remainder RCDs and even chitosan, especially at low concentrations under the best adsorption conditions (pH 4, RS/L = 2.5 mg mL-1). RCD3 adsorption data were better described by the Langmuir-Freundlich isotherm and the pseudo-second-order kinetic models. The interaction mechanism was assessed by molecular dynamics simulations, showing that RCDs favour Cu(II) capture from water compared to chitosan, due to a greater Cu(II) interaction with the oxygen of the glucosamine ring and the neighbouring hydroxyl groups.
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Affiliation(s)
- Pedro M C Matias
- University of Coimbra, CQC-IMS, Department of Chemistry, 3004-535 Coimbra, Portugal
| | - Joana F M Sousa
- University of Coimbra, CQC-IMS, Department of Chemistry, 3004-535 Coimbra, Portugal
| | - Eva F Bernardino
- University of Coimbra, CQC-IMS, Department of Chemistry, 3004-535 Coimbra, Portugal
| | - João P Vareda
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, 3030-790 Coimbra, Portugal
| | - Luisa Durães
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, 3030-790 Coimbra, Portugal
| | - Paulo E Abreu
- University of Coimbra, CQC-IMS, Department of Chemistry, 3004-535 Coimbra, Portugal
| | - Jorge M C Marques
- University of Coimbra, CQC-IMS, Department of Chemistry, 3004-535 Coimbra, Portugal
| | - Dina Murtinho
- University of Coimbra, CQC-IMS, Department of Chemistry, 3004-535 Coimbra, Portugal
| | - Artur J M Valente
- University of Coimbra, CQC-IMS, Department of Chemistry, 3004-535 Coimbra, Portugal
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ALSamman MT, Sánchez J. Adsorption of Copper and Arsenic from Water Using a Semi-Interpenetrating Polymer Network Based on Alginate and Chitosan. Polymers (Basel) 2023; 15:polym15092192. [PMID: 37177337 PMCID: PMC10180717 DOI: 10.3390/polym15092192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 04/25/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023] Open
Abstract
New biobased hydrogels were prepared via a semi-interpenetrating polymer network (semi-IPN) using polyacrylamide/chitosan (PAAM/chitosan) hydrogel for the adsorption of As(V) or poly acrylic acid/alginate (PAA/alginate) hydrogel for the adsorption of Cu(II). Both systems were crosslinked using N,N'-methylenebisacrylamide as the crosslinker and ammonium persulfate as the initiating agent. The hydrogels were characterized by SEM, Z-potential, and FTIR. Their performance was studied under different variables, such as the biopolymer effect, adsorbent dose, pH, contact time, and concentration of metal ions. The characterization of hydrogels revealed the morphology of the material, with and without biopolymers. In both cases, the added biopolymer provided porosity and cavities' formation, which improved the removal capacity. The Z-potential informed the surface charge of hydrogels, and the addition of biopolymers modified it, which explains the further metal removal ability. The FTIR spectra showed the functional groups of the hydrogels, confirming its chemical structure. In addition, the adsorption results showed that PAAM/chitosan can efficiently remove arsenic, reaching a capacity of 17.8 mg/g at pH 5.0, and it can also be regenerated by HNO3 for six cycles. On the other hand, copper-ion absorption was studied on PAA/alginate, which can remove with an adsorption capacity of 63.59 mg/g at pH 4.0, and the results indicate that it can also be regenerated by HNO3 for five cycles.
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Affiliation(s)
- Mohammad T ALSamman
- Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile (USACH), Santiago 9170022, Chile
| | - Julio Sánchez
- Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile (USACH), Santiago 9170022, Chile
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Zhang L, Yang W, Zhang C, Pan R, Chen Q, Zhang L. Cu 2+-imprinted optical fiber SPR sensor for intelligent recognition. OPTICS EXPRESS 2022; 30:45525-45537. [PMID: 36522957 DOI: 10.1364/oe.476698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 11/03/2022] [Indexed: 06/17/2023]
Abstract
An optical fiber surface plasma resonance (SPR) sensor with MMF-TCF-MMF structure was designed to realize intelligent recognition of copper ions (Cu2+), and the selective adsorption sensitization was achieved by plating a layer of Cu2+-imprinted film on the surface of gold film excitation layer. Combining the principle of optical fiber interference and SPR, the proposed sensor realized the detection of the copper ions concentration through measuring the refractive index changes caused by ions adsorption on imprinted film. The Cu2+-imprinted optical fiber SPR sensor can realize the intelligent recognition and detection of copper ions in the complex environment and exhibits a detection sensitivity of -10.05 pm/ppm. The proposed sensor has tremendous development potential in practical application, and provides new ideas for the field of metal ions detection.
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Alankarage D, Juhasz AL. Impact of smelter re-development on spatial and temporal airborne Pb concentrations. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 311:119952. [PMID: 35985437 DOI: 10.1016/j.envpol.2022.119952] [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: 03/30/2022] [Revised: 08/04/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
Total suspended particulate (TSP) and PM10 filters collected from two ambient air monitoring stations in Port Pirie were analysed to determine the impact of a lead (Pb) smelter redevelopment on air quality parameters including total elemental concentration, Pb isotopic ratio, Pb bioaccessibility and Pb speciation. Filters from 2009 to 2020 were analysed with a focus on samples from 2017 (immediately prior to smelter redevelopment) and 2020 (post-smelter redevelopment). Lead concentration in 2009-2020 TSP was variable ranging up to 6.94 μg m-3 (mean = 0.57 μg m-3), however, no significant decrease in Pb concentration was observed at either Port Pirie West (p = 0.56, n = 34) or Oliver Street (p = 0.32, n = 28) monitoring stations when 2017 and 2020 TSP values were compared. Similarly, no significant difference (p = 0.42) in PM10 Pb concentration was observed in 2017 (mean = 0.80 μg m-3) and 2020 (0.60 μg m-3) Oliver Street filters. Although no change in percentage Pb bioaccessibility was observed when 2017 and 2020 Port Pirie West TSP samples were compared (mean of 88.7% versus 88.0%), Pb bioaccessibility was lower (p < 0.005) in both 2020 TSP (mean of 83.9% versus 62.9%) and PM10 (mean of 70.8% versus 58.3%) Oliver Street filters compared to 2017. While scanning electron microscopy, energy dispersive x-ray spectroscopy identified a number of Pb phases within filters (galena, anglesite, cerussite, conglomerates), differences in Pb speciation between 2017 and 2020 filters could not be identified although it was presumed that this influenced Pb bioaccessibility outcomes at Oliver Street. Data from this study suggests that recent smelter redevelopments have not significantly decreased the concentrations of airborne Pb in Port Pirie although re-entrainment of soil-Pb from historical impact may also be a contributing Pb source.
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Affiliation(s)
| | - Albert L Juhasz
- Future Industries Institute, University of South Australia, Australia.
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Ecofriendly Removal of Aluminum and Cadmium Sulfate Pollution by Adsorption on Hexanoyl-Modified Chitosan. POLYSACCHARIDES 2022. [DOI: 10.3390/polysaccharides3030035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The purity and safety of water as a finite resource is highly important in order to meet current and future human needs. To address this issue, the usage of environmentally friendly and biodegradable adsorbers and flocculants is essential. Chitosan, as a biopolymer, features tremendous properties as an adsorber and flocculant for water treatment. For the application of chitosan as an adsorber under acidic aqueous conditions, such as acid mine drainage, chitosan has been modified with hydrophobic hexanoyl chloride (H-chitosan) to reduce the solubility at a lower pH. In order to investigate the influence of the substitution of the hexanoyl chloride on the adsorption properties of chitosan, two chitosans of different molecular weights and of three different functionalization degrees were analyzed for the adsorption of CdSO4(aq) and Al2(SO4)3(aq). Among biobased adsorbents, H-chitosan derived from the shorter Chitosan exhibited extraordinarily high maximum adsorption capacities of 1.74 mmol/g and 2.06 mmol/g for Cd2+ and sulfate, and 1.76 mmol/g and 2.60 mmol/g for Al3+ and sulfate, respectively.
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Wang S, Ma J, Wang C, Xi W, Bai Y, Lu W, Wang J. Elimination of radionuclide uranium (VI) from aqueous solutions using an α-MnO2@CTS composite adsorbent. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119448] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ekambaram R, Sugumar M, Karuppasamy S, Prasad P, Dharmalingam S. Fabrication of wheatgrass incorporated PCL/chitosan biomimetic nanoscaffold for skin wound healing: In vitro and In silico analysis. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Maslamani N, Bakhsh EM, Khan SB, Danish EY, Akhtar K, Fagieh TM, Su X, Asiri AM. Chitosan@Carboxymethylcellulose/CuO-Co 2O 3 Nanoadsorbent as a Super Catalyst for the Removal of Water Pollutants. Gels 2022; 8:91. [PMID: 35200472 PMCID: PMC8871360 DOI: 10.3390/gels8020091] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/13/2022] [Accepted: 01/20/2022] [Indexed: 02/05/2023] Open
Abstract
In this work, an efficient nanocatalyst was developed based on nanoadsorbent beads. Herein, carboxymethyl cellulose-copper oxide-cobalt oxide nanocomposite beads (CMC/CuO-Co2O3) crosslinked by using AlCl3 were successfully prepared. The beads were then coated with chitosan (Cs), Cs@CMC/CuO-Co2O3. The prepared beads, CMC/CuO-Co2O3 and Cs@CMC/CuO-Co2O3, were utilized as adsorbents for heavy metal ions (Ni, Fe, Ag and Zn). By using CMC/CuO-Co2O3 and Cs@CMC/CuO-Co2O3, the distribution coefficients (Kd) for Ni, Fe, Ag and Zn were (41.166 and 6173.6 mLg-1), (136.3 and 1500 mLg-1), (20,739.1 and 1941.1 mLg-1) and (86.9 and 2333.3 mLg-1), respectively. Thus, Ni was highly adsorbed by Cs@CMC/CuO-Co2O3 beads. The metal ion adsorbed on the beads were converted into nanoparticles by treating with reducing agent (NaBH4) and named Ni/Cs@CMC/CuO-Co2O3. Further, the prepared nanoparticles-decorated beads (Ni/Cs@CMC/CuO-Co2O3) were utilized as nanocatalysts for the reduction of organic and inorganic pollutants (4-nitophenol, MO, EY dyes and potassium ferricyanide K3[Fe(CN)6]) in the presence of NaBH4. Among all catalysts, Ni/Cs@CMC/CuO-Co2O3 had the highest catalytic activity toward MO, EY and K3[Fe(CN)6], removing up to 98% in 2.0 min, 90 % in 6.0 min and 91% in 6.0 min, respectively. The reduction rate constants of MO, EY, 4-NP and K3[Fe(CN)6] were 1.06 × 10-1, 4.58 × 10-3, 4.26 × 10-3 and 5.1 × 10-3 s-1, respectively. Additionally, the catalytic activity of the Ni/Cs@CMC/CuO-Co2O3 beads was effectively optimized. The stability and recyclability of the beads were tested up to five times for the catalytic reduction of MO, EY and K3[Fe(CN)6]. It was confirmed that the designed nanocomposite beads are ecofriendly and efficient with high strength and stability as catalysts for the reduction of organic and inorganic pollutants.
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Affiliation(s)
- Nujud Maslamani
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (N.M.); (E.Y.D.); (K.A.); (T.M.F.); (A.M.A.)
| | - Esraa M. Bakhsh
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (N.M.); (E.Y.D.); (K.A.); (T.M.F.); (A.M.A.)
| | - Sher Bahadar Khan
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (N.M.); (E.Y.D.); (K.A.); (T.M.F.); (A.M.A.)
- Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Ekram Y. Danish
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (N.M.); (E.Y.D.); (K.A.); (T.M.F.); (A.M.A.)
| | - Kalsoom Akhtar
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (N.M.); (E.Y.D.); (K.A.); (T.M.F.); (A.M.A.)
| | - Taghreed M. Fagieh
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (N.M.); (E.Y.D.); (K.A.); (T.M.F.); (A.M.A.)
| | - Xintai Su
- Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China;
| | - Abdullah M. Asiri
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (N.M.); (E.Y.D.); (K.A.); (T.M.F.); (A.M.A.)
- Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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Babakhani A, Sartaj M. Competitive adsorption of nickel(II) and cadmium(II) ions by chitosan cross-linked with sodium tripolyphosphate. CHEM ENG COMMUN 2021. [DOI: 10.1080/00986445.2021.1966424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ataollah Babakhani
- Faculty of Engineering, Department of Civil Engineering, University of Ottawa, Ottawa, ON, Canada
| | - Majid Sartaj
- Faculty of Engineering, Department of Civil Engineering, University of Ottawa, Ottawa, ON, Canada
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Selenium/Chitosan-Folic Acid Metal Complex Ameliorates Hepatic Damage and Oxidative Injury in Male Rats Exposed to Sodium Fluoride. CRYSTALS 2021. [DOI: 10.3390/cryst11111354] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Continuous exposure to sodium fluoride (NaF) imbalances the oxidative status in the body. The current study investigated the effect of the selenium/chitosan-folic (Se/chitosan-folic acid) novel metal complex on oxidative injury and tissue damage in the hepatic tissues of male rats exposed to (NaF). Male rats received NaF (10.3 mg/kg) and Se/chitosan-folic acid (0.5 mg/Kg) orally for successive 30 days. Male rats exposed to NaF showed multi-histopathological alterations in the hepatic tissues including degenerative changes. NaF exposure elevated hepatic oxidative stress markers, lipid peroxidation, and lowered the antioxidant defense enzymes. Se/chitosan-folic acid novel complex supplementation significantly prevented hepatic injury, suppressed reactive oxygen species (ROS) generation and lipid peroxidation, and enhanced the antioxidant defense enzymes. In addition, Se/chitosan-folic acid supplementation improved the hepatic tissues of NaF-exposed male rats. In conclusion, the Se/chitosan-folic acid novel metal complex protects against NaF-induced oxidative injury and tissue injury in the hepatic tissues of male rats. The Se/chitosan-folic acid novel metal complex upregulated the hepatic tissues and enhanced the antioxidant defense enzymes in male rats.
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Nonlinear Isotherm and Kinetic Modeling of Cu(II) and Pb(II) Uptake from Water by MnFe2O4/Chitosan Nanoadsorbents. WATER 2021. [DOI: 10.3390/w13121662] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Researchers are in continuous search of better strategies to minimize, if not prevent, the anthropogenic release of toxic heavy metals, such as Cu(II) and Pb(II), into drinking water resources and the natural environment. Herein, we report for the first time the low-temperature combustion synthesis of magnetic chitosan-manganese ferrite in the absence of toxic cross-linking agents and its removal of Cu(II) and Pb(II) from single-component metal solutions. The nonlinear Langmuir model best described the isotherm data, while the nonlinear pseudo-second order model best described the kinetic data, signifying monolayer Cu(II) or Pb(II) adsorption and chemisorption as the rate-determining step, respectively. Adsorption capacities by magnetic chitosan-manganese ferrite obtained for both metals were consistently higher than those by manganese ferrite, indicating that chitosan enhanced the performance of the magnetic adsorbent. The maximum adsorption capacities of magnetic chitosan-manganese ferrite for Cu(II) and Pb(II) were 14.86 and 15.36 mg g−1, while that of manganese ferrite were 2.59 and 13.52 mg g−1, respectively. Moreover, the adsorbents showed superior binding affinity and sorption for Pb(II) than Cu(II) owing to the stronger ability of the former to form inner-sphere complexes with manganese ferrite and magnetic chitosan-manganese ferrite. Finally, thermodynamic studies revealed that the uptake of either Pb(II) or Cu(II) by magnetic chitosan-manganese ferrite was spontaneous and endothermic. The as-prepared adsorbent was characterized for morphology, elemental composition, surface functional sites, and particle size using scanning electron microscopy, energy dispersive spectroscopy, Fourier transform infrared spectroscopy, and dynamic light scattering technique, respectively.
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Saravanan A, Karishma S, Kumar PS, Varjani S, Yaashikaa PR, Jeevanantham S, Ramamurthy R, Reshma B. Simultaneous removal of Cu(II) and reactive green 6 dye from wastewater using immobilized mixed fungal biomass and its recovery. CHEMOSPHERE 2021; 271:129519. [PMID: 33460887 DOI: 10.1016/j.chemosphere.2020.129519] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 12/24/2020] [Accepted: 12/28/2020] [Indexed: 06/12/2023]
Abstract
Immobilized fungal biomass (Aspergillus niger and Aspergillus flavus) was prepared and analysed for the simultaneous removal of Cu(II) ion and Reactive Green 6 dye from aqueous phase. Different characterization analysis was utilized to exploit the adsorption characteristics of fungal biomass. Batch biosorption tests, performed to investigate the factors influencing biosorption process inferred optimal values of 25 mg/L of adsorbate with equilibrium time of 60 min, 2.5 g of immobilized fungal biomass, temperature of 303 K and pH of 5.0 for the maximal removal of pollutants. The obtained experimental data was utilized to evaluate the kinetic, thermodynamic and equilibrium models. Langmuir isotherm model has higher correlation coefficient [Cu(II) ion = 0.8625 and RG 6 dye = 0.8575] with small values of errors (RMSE = 3.746 and SSE = 56.12 for Cu(II) ion; RMSE = 4.872 and SSE = 11.87 for RG 6 dye). Kinetic studies performed to evaluate the adsorption rate mechanism of this present study indicated that pseudo-first order and pseudo-second order kinetics to be most fitting model for removal of Cu(II) ions and Reactive green dye respectively. Thermodynamic analysis inferred the spontaneous, random, and exothermic nature of the biosorption process based on ΔGo, ΔHo, and ΔSo values respectively. The prepared biomass can be an alternative for the elimination of toxic pollutants from wastewater.
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Affiliation(s)
- A Saravanan
- Department of Biotechnology, Rajalakshmi Engineering College, Chennai, India
| | - S Karishma
- Department of Biotechnology, Rajalakshmi Engineering College, Chennai, India
| | - P Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, India.
| | - Sunita Varjani
- Gujarat Pollution Control Board, Gandhinagar, 382010, Gujarat, India.
| | - P R Yaashikaa
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, India
| | - S Jeevanantham
- Department of Biotechnology, Rajalakshmi Engineering College, Chennai, India
| | - Racchana Ramamurthy
- Department of Biotechnology, Rajalakshmi Engineering College, Chennai, India; Department of Environmental Engineering and Water Technology, IHE Delft Institute for Water Education, PO Box 3015, 2061, DA Delft, the Netherlands
| | - B Reshma
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, India
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Rezgui S, Díez AM, Monser L, Adhoum N, Pazos M, Sanromán MA. ZnFe 2O 4-chitosan magnetic beads for the removal of chlordimeform by photo-Fenton process under UVC irradiation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 283:111987. [PMID: 33516095 DOI: 10.1016/j.jenvman.2021.111987] [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] [Received: 03/17/2020] [Revised: 12/05/2020] [Accepted: 01/10/2021] [Indexed: 06/12/2023]
Abstract
A simple protocol was proposed for the preparation of magnetic chitosan beads ZnFe2O4-CS via a co-precipitation method. The use of synthesized magnetic ZnFe2O4-CS beads as catalyst for the heterogeneous photo-Fenton treatment of chlordimeform insecticide (CDM) was evaluated. The photo-Fenton experiments were carried out with different synthesized catalysts by varying the molar ratio Zn/Fe in chitosan beads, the catalyst concentration and pH. Under optimal conditions using 1 g of ZnFe2O4-CS beads with a molar ratio Zn/Fe = 0.35 and at pHinitial = 3, a real wastewater doped with 20 mg L-1 of CDM was treated and complete removal of the insecticide was achieved after 7 min with a total TOC removal after 2 h of treatment. The generated carboxylic acids and ions during the photo-Fenton process were identified and quantified. The stability of the photocatalytic activity of the best catalyst in terms of pollutant removal, ZnFe2O4-CS(0.35) beads with a molar ratio Zn/Fe equal to 0.35, was satisfactory validated by four consecutive cycles. This optimal catalyst was characterized, before and after use, by Scanning Electron Microscopy/Energy Dispersive X-Ray Spectroscopy, X-Ray Powder Diffraction and Vibrating Sample Magnetometry analysis.
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Affiliation(s)
- Soumaya Rezgui
- BIOSUV Research Group, INTECX building, Universidade de Vigo, Campus AsLagoas - Marcosende, 36310, Vigo, Spain; Unité de recherche en Electrochimie, Matériaux et Environnement (UR16ES02), IPEIK, Université de Kairouan, Tunisia; Institut National des Sciences Appliquées et de Technologie, B.P. N° 676, 1080, Tunis Cedex, Tunisia.
| | - Aida M Díez
- BIOSUV Research Group, INTECX building, Universidade de Vigo, Campus AsLagoas - Marcosende, 36310, Vigo, Spain
| | - Lotfi Monser
- Unité de recherche en Electrochimie, Matériaux et Environnement (UR16ES02), IPEIK, Université de Kairouan, Tunisia; Institut National des Sciences Appliquées et de Technologie, B.P. N° 676, 1080, Tunis Cedex, Tunisia
| | - Nafaa Adhoum
- Unité de recherche en Electrochimie, Matériaux et Environnement (UR16ES02), IPEIK, Université de Kairouan, Tunisia
| | - Marta Pazos
- BIOSUV Research Group, INTECX building, Universidade de Vigo, Campus AsLagoas - Marcosende, 36310, Vigo, Spain
| | - M Angeles Sanromán
- BIOSUV Research Group, INTECX building, Universidade de Vigo, Campus AsLagoas - Marcosende, 36310, Vigo, Spain
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Kafetzi M, Borchert KB, Steinbach C, Schwarz D, Pispas S, Schwarz S. Thermoresponsive PNIPAM-b-PAA block copolymers as “smart” adsorbents of Cu(II) for water restore treatments. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.126049] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Weißpflog J, Vehlow D, Müller M, Kohn B, Scheler U, Boye S, Schwarz S. Characterization of chitosan with different degree of deacetylation and equal viscosity in dissolved and solid state - Insights by various complimentary methods. Int J Biol Macromol 2021; 171:242-261. [PMID: 33418043 DOI: 10.1016/j.ijbiomac.2021.01.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 12/22/2020] [Accepted: 01/03/2021] [Indexed: 11/17/2022]
Abstract
In recent years, chitosan has attracted considerable interest in many fields due to its sufficient charge density under biological, non-hazardous conditions. Since chitosan originates from natural resources and has two different monomer units, its characterization must be carried out in a goal-oriented and precise manner. This work focuses on the characterization of chitosans most important parameters - solubility, crystallinity, degree of deacetylation (DD) and molecular weight - in a simple and convenient way. The DD was determined using Nuclear Magnetic Resonance spectroscopy (NMR), Particle Charge Detection (PCD), Fourier Transform Infrared spectroscopy (FTIR), CHN elemental analysis (CHN-EA) and conductometric/potentiometric titration with special attention to its physical state as solid or liquid. Investigation of DD by FTIR was successfully determined by calculating peak heights, peak areas and peak deconvolution from a linear combination of Gaussian and Lorentzian functions. Asymmetrical flow field flow fractionation with light scattering detection (AF4-LS) was applied in order to calculate molar masses and radii. In addition, pH-potentiometric titrations demonstrated a reproducible displacement of the point of zero charge (PZC) in form of a hysteresis depending on the titration direction. The DD affects the crystallinity, which was determined by deconvolution of the crystalline and amorphous domains.
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Affiliation(s)
- Janek Weißpflog
- Leibniz-Institut für Polymerforschung Dresden, Physikalische Chemie und Physik der Polymere, Hohe Straße 6, D-01069 Dresden, Germany.
| | - David Vehlow
- Leibniz-Institut für Polymerforschung Dresden, Physikalische Chemie und Physik der Polymere, Hohe Straße 6, D-01069 Dresden, Germany.
| | - Martin Müller
- Leibniz-Institut für Polymerforschung Dresden, Physikalische Chemie und Physik der Polymere, Hohe Straße 6, D-01069 Dresden, Germany.
| | - Benjamin Kohn
- Leibniz-Institut für Polymerforschung Dresden, Physikalische Chemie und Physik der Polymere, Hohe Straße 6, D-01069 Dresden, Germany.
| | - Ulrich Scheler
- Leibniz-Institut für Polymerforschung Dresden, Physikalische Chemie und Physik der Polymere, Hohe Straße 6, D-01069 Dresden, Germany.
| | - Susanne Boye
- Leibniz-Institut für Polymerforschung Dresden, Physikalische Chemie und Physik der Polymere, Hohe Straße 6, D-01069 Dresden, Germany.
| | - Simona Schwarz
- Leibniz-Institut für Polymerforschung Dresden, Physikalische Chemie und Physik der Polymere, Hohe Straße 6, D-01069 Dresden, Germany.
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18
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Kolcsár VJ, Szőllősi G. Chitosan as a chiral ligand and organocatalyst: preparation conditions–property–catalytic performance relationships. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01674a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Properties of chitosan prepared by alkaline deacetylation of chitin under various conditions were correlated with their performance as ligands or organocatalysts in asymmetric catalytic reactions.
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Affiliation(s)
| | - György Szőllősi
- Stereochemistry Research Group, Eötvös Loránd Research Network, University of Szeged, Eötvös utca 6, 6720 Szeged, Hungary
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Porous thiourea-grafted-chitosan hydrogels: Synthesis and sorption of toxic metal ions from contaminated waters. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125504] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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20
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Probing the Molecular Interactions of Chitosan Films in Acidic Solutions with Different Salt Ions. COATINGS 2020. [DOI: 10.3390/coatings10111052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Understanding the interaction mechanisms of chitosan films plays a central role in a wide range of its applications, such as bioadhesive, drug delivery, wound healing, tissue engineering, and wastewater treatment for heavy metal ions. Here, we investigated the molecular interactions between chitosan films in acidic solutions with different salt ions using a surface forces apparatus (SFA). The results showed that chitosan can be adsorbed to mica surfaces by electrostatic interaction under acidic conditions. The force measurements demonstrated that the interactions depend on the salt types, concentrations, and contact time. With the addition of 1 mM LaCl3 and NaCl into the acetic acid (HAc) buffer solution, the cohesion between chitosan films enhanced by about 45% and 20%, respectively, after a contact time of 60 min. The enhanced cohesion induced by the combination of partly intermolecular complexation formation in a bridge model and conformation adjustment of chitosan under contact time in 1 mM LaCl3 solution. However, the cohesion reduced rapidly and even disappeared when the salt concentration increased to 10 mM and 100 mM. We proposed that the cross-linked structures of chitosan mainly contribute to the significant reduction of chitosan cohesion in LaCl3 solution. In comparison, the decrease in cohesion capacity in NaCl solution mainly results from the enhanced hydration effect. Our findings may provide insights into the interaction mechanisms of chitosan films under nanoconfinement in acidic conditions and suggestions for the development of chitosan-based materials.
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Zhang W, An Y, Li S, Liu Z, Chen Z, Ren Y, Wang S, Zhang X, Wang X. Enhanced heavy metal removal from an aqueous environment using an eco-friendly and sustainable adsorbent. Sci Rep 2020; 10:16453. [PMID: 33020581 PMCID: PMC7536411 DOI: 10.1038/s41598-020-73570-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 09/20/2020] [Indexed: 01/07/2023] Open
Abstract
Thiol-lignocellulose sodium bentonite (TLSB) nanocomposites can effectively remove heavy metals from aqueous solutions. TLSB was formed by using -SH group-modified lignocellulose as a raw material, which was intercalated into the interlayers of hierarchical sodium bentonite. Characterization of TLSB was then performed with BET, FTIR, XRD, TGA, PZC, SEM, and TEM analyses. The results indicated that thiol-lignocellulose molecules may have different influences on the physicochemical properties of sodium bentonite, and an intercalated-exfoliated structure was successfully formed. The TLSB nanocomposite was subsequently investigated to validate its adsorption and desorption capacities for the zinc subgroup ions Zn(II), Cd(II) and Hg(II). The optimum adsorption parameters were determined based on the TLSB nanocomposite dosage, concentration of zinc subgroup ions, solution pH, adsorption temperature and adsorption time. The results revealed that the maximum adsorption capacity onto TLSB was 357.29 mg/g for Zn(II), 458.32 mg/g for Cd(II) and 208.12 mg/g for Hg(II). The adsorption kinetics were explained by the pseudo-second-order model, and the adsorption isotherm conformed to the Langmuir model, implying that the dominant chemical adsorption mechanism on TLSB is monolayer coverage. Thermodynamic studies suggested that the adsorption is spontaneous and endothermic. Desorption and regeneration experiments revealed that TLSB could be desorbed with HCl to recover Zn(II) and Cd(II) and with HNO3 to recover Hg(II) after several consecutive adsorption/desorption cycles. The adsorption mechanism was investigated through FTIR, EDX and SEM, which demonstrated that the introduction of thiol groups improved the adsorption capacity. All of these results suggested that TLSB is an eco-friendly and sustainable adsorbent for the extraction of Zn(II), Cd(II) and Hg(II) ions in aqueous media.
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Affiliation(s)
- Wanqi Zhang
- College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot, China
| | - Yuhong An
- College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot, China
| | - Shujing Li
- College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot, China
| | - Zhechen Liu
- College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot, China
| | - Zhangjing Chen
- Department of Sustainable Biomaterials, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Yukun Ren
- Bioimaging Research, Sanofi Global R&D, Framingham, MA, USA
| | - Sunguo Wang
- Sungro Bioresource and Bioenergy Technologies Corp, Alberta, Canada
| | - Xiaotao Zhang
- College of Science, Inner Mongolia Agricultural University, Hohhot, China.
- Inner Mongolia Key Laboratory of Sandy Shrubs Fibrosis and Energy Development and Utilization, Hohhot, China.
| | - Ximing Wang
- College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot, China.
- Inner Mongolia Key Laboratory of Sandy Shrubs Fibrosis and Energy Development and Utilization, Hohhot, China.
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22
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Bucatariu F, Schwarz D, Zaharia M, Steinbach C, Ghiorghita CA, Schwarz S, Mihai M. Nanostructured polymer composites for selective heavy metal ion sorption. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125211] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Modular Chitosan-Based Adsorbents for Tunable Uptake of Sulfate from Water. Int J Mol Sci 2020; 21:ijms21197130. [PMID: 32992564 PMCID: PMC7582897 DOI: 10.3390/ijms21197130] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/19/2020] [Accepted: 09/21/2020] [Indexed: 01/26/2023] Open
Abstract
The context of this study responds to the need for sorbent technology development to address the controlled removal of inorganic sulfate (SO42−) from saline water and the promising potential of chitosan as a carrier system for organosulfates in pharmaceutical and nutraceutical applications. This study aims to address the controlled removal of sulfate using chitosan as a sustainable biopolymer platform, where a modular synthetic approach was used for chitosan bead preparation that displays tunable sulfate uptake. The beads were prepared via phase-inversion synthesis, followed by cross-linking with glutaraldehyde, and impregnation of Ca2+ ions. The sulfate adsorption properties of the beads were studied at pH 5 and variable sulfate levels (50–1000 ppm), where beads with low cross-linking showed moderate sulfate uptake (35 mg/g), while cross-linked beads imbibed with Ca2+ had greater sulfate adsorption (140 mg/g). Bead stability, adsorption properties, and the point-of-zero charge (PZC) from 6.5 to 6.8 were found to depend on the cross-linking ratio and the presence of Ca2+. The beads were regenerated over multiple adsorption-desorption cycles to demonstrate the favorable uptake properties and bead stability. This study contributes to the development of chitosan-based adsorbent technology via a modular materials design strategy for the controlled removal of sulfate. The results of this study are relevant to diverse pharmaceutical and nutraceutical applications that range from the controlled removal of dextran sulfate from water to the controlled release of chondroitin sulfate.
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24
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Nguyen Van H, Chu Van H, Luu Hoang T, Vo Nguyen DK, Ha Thuc CN. The starch modified montmorillonite for the removal of Pb(II), Cd(II) and Ni(II) ions from aqueous solutions. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.08.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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25
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Li X, Zhang J, Xie H, Pan Y, Liu J, Huang Z, Long X, Xiao H. Cellulose-based adsorbents loaded with zero-valent iron for removal of metal ions from contaminated water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:33234-33247. [PMID: 32533473 DOI: 10.1007/s11356-020-09390-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 05/19/2020] [Indexed: 06/11/2023]
Abstract
Sawdust loaded with zero-valent iron (S-ZVI) was prepared using a liquid phase reduction method for removing heavy metal ions from contaminated water. Surface chemistry and morphology of adsorbents were characterized with Fourier transform infrared (FT-IR) spectrometry, X-ray diffraction (XRD), scanning electron microscopy (SEM), SEM-mapping, EDX, and X-ray photoelectron spectrum (XPS). The results demonstrated that the zero-valent iron was successfully loaded onto the sawdust. The impact of various factors such as pH, initial metal ion concentration, temperature, and contact time on the removal capability of the adsorbents was systematically investigated. The equilibrium adsorption data showed that the adsorption of arsenic ions and Cr(III) followed the Langmuir model well, and the maximum adsorption reached 111.37 and 268.7 mg/g in an aqueous solution system. In addition, the adsorption kinetics was more accurately described by the pseudo-second-order model, suggesting the domination of chemical adsorption. Meanwhile, the results on recyclability indicated that the high performance of S-ZVI on the removal of arsenic ions was well maintained after three regeneration cycles. The adsorption mechanism revealed in this work suggested that S-ZVI improved the dispersion of ZVI by minimizing the agglomeration, thus leading to highly effective adsorption via chelation, electrostatic interaction, and redox reaction.
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Affiliation(s)
- Xiaoning Li
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, Ministry of Education, Beijing, 102206, China
| | - Jinyao Zhang
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, Ministry of Education, Beijing, 102206, China
| | - Hongtian Xie
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, Ministry of Education, Beijing, 102206, China
| | - Yuanfeng Pan
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China.
| | - Jie Liu
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, Ministry of Education, Beijing, 102206, China
| | - Zhihong Huang
- ShengQing Environmental Protection Ltd. Co., Kunming, 650093, Yunnan, China
| | - Xiang Long
- ShengQing Environmental Protection Ltd. Co., Kunming, 650093, Yunnan, China
| | - Huining Xiao
- Department of Chemical Engineering, University of New Brunswick, Fredericton, NB, E3B 5A3, Canada.
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Bucatariu F, Ghiorghita CA, Zaharia MM, Schwarz S, Simon F, Mihai M. Removal and Separation of Heavy Metal Ions from Multicomponent Simulated Waters Using Silica/Polyethyleneimine Composite Microparticles. ACS APPLIED MATERIALS & INTERFACES 2020; 12:37585-37596. [PMID: 32697568 DOI: 10.1021/acsami.0c10283] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Composite solid surfaces with high content of functional groups (FGs) are useful materials in different types of applications requiring stimuli-responsive "hard/soft" architectures, their improved properties rising from the combination of organic-inorganic parts. Among different types of weak polyelectrolytes, poly(ethyleneimine) (PEI) is of great interest in the construction of composite systems with thin layer-by-layer (LbL) organic films due to the large number of amino groups per unit mass of polymer. Herein, the spherical silica microparticles were modified with linear (L) or branched (B) PEI chains using LbL deposition of a copper complex (PEIL-Cu2+ or PEIB-Cu2+) and poly(acrylic acid) (PAA), glutaraldehyde selective cross-linking, followed by copper and PAA extraction from the multilayer. The newly formed silica/(PEIL)10 and silica/(PEIB)10 composites were used in batch and column sorption/desorption experiments of four heavy metal ions (Cu2+, Ni2+, Co2+, and Cd2+). In noncompetitive conditions ([FG]/Σ[M2+] > 9), all heavy metal ions were retained on composites, demonstrating the potential application of the prepared functional microparticles in surface water treatment. However, in competitive conditions ([FG]/Σ[M2+] < 9), only Cu2+ is sorbed in high amount (∼2.5 mmol·g-1 PEI) on composites, with simultaneous displacement of already sorbed ions, demonstrating the solid-phase extraction and chromatographic properties of the synthesized silica/(PEIL)n and silica/(PEIB)n composites.
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Affiliation(s)
- Florin Bucatariu
- "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania
| | | | - Marius-Mihai Zaharia
- "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania
| | - Simona Schwarz
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany
| | - Frank Simon
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany
| | - Marcela Mihai
- "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania
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Zhang Y, Wei Z, Li M, Wu X, Wang W. Preparation and Modification of Mullite Whiskers/Cordierite Porous Ceramics for Cu 2+ Adsorption and Removing. ACS OMEGA 2020; 5:15691-15701. [PMID: 32637844 PMCID: PMC7331199 DOI: 10.1021/acsomega.0c02085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 06/10/2020] [Indexed: 06/11/2023]
Abstract
In this paper, mullite whiskers were prepared by a molten salt reaction method based on a porous cordierite ceramic substrate (MC), and the modified mullite whiskers/cordierite ceramic sample (MCK) was obtained via the silane coupling reaction with γ-aminopropyl triethoxysilane (KH550). The structural morphology and phase compositions of the MC were characterized by X-ray diffraction and scanning electron microscopy. The surface functional groups of MCK were characterized using Fourier transform infrared spectroscopy, and the result showed that the amino group (-NH2) was successfully grafted onto the surface of cordierite ceramic. X-ray photoelectron spectroscopy analysis successfully showed inclusion of the amino and Cu2+ adsorption mechanism onto MCK. The adsorption properties of MCK were investigated using Cu2+ as the target pollutant by varying the experimental conditions such as pH, time, temperature, and initial Cu2+ concentration. The adsorption was found to be spontaneous, endothermic, and feasible, as indicated by the study of thermodynamic parameters. The adsorption kinetic analysis suggested that the pseudo-second-order kinetic model was best fitted for Cu2+ adsorption. The adsorption isotherm studies showed that the results of the Freundlich model are more suitable for experimental adsorption data than the Langmuir model. The adsorption-desorption cycle indicated that MCK had good reusability and stability. A novel porous ceramic-based adsorbent with high Cu2+ adsorption and removal efficiency was fabricated and has potential applications for the metal ion removing field.
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Affiliation(s)
- Yaoyao Zhang
- Key Laboratory of
Subsurface Hydrology and Ecological Effects in Arid Region of the
Ministry of Education, Chang’an University, Xi’an 710054, China
- School of Water and Environment, Chang’an University, Xi’an 710054, China
| | - Zhengwen Wei
- Key Laboratory of
Subsurface Hydrology and Ecological Effects in Arid Region of the
Ministry of Education, Chang’an University, Xi’an 710054, China
- School of Water and Environment, Chang’an University, Xi’an 710054, China
| | - Mengyao Li
- School of Water and Environment, Chang’an University, Xi’an 710054, China
| | - Xishe Wu
- School of Water and Environment, Chang’an University, Xi’an 710054, China
| | - Wei Wang
- Key Laboratory of
Subsurface Hydrology and Ecological Effects in Arid Region of the
Ministry of Education, Chang’an University, Xi’an 710054, China
- School of Water and Environment, Chang’an University, Xi’an 710054, China
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28
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Weißpflog J, Gündel A, Vehlow D, Steinbach C, Müller M, Boldt R, Schwarz S, Schwarz D. Solubility and Selectivity Effects of the Anion on the Adsorption of Different Heavy Metal Ions onto Chitosan. Molecules 2020; 25:molecules25112482. [PMID: 32471099 PMCID: PMC7321104 DOI: 10.3390/molecules25112482] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/16/2020] [Accepted: 05/21/2020] [Indexed: 02/03/2023] Open
Abstract
The biopolymer chitosan is a very efficient adsorber material for the removal of heavy metal ions from aqueous solutions. Due to the solubility properties of chitosan it can be used as both a liquid adsorber and a solid flocculant for water treatment reaching outstanding adsorption capacities for a number of heavy metal ions. However, the type of anion corresponding to the investigated heavy metal ions has a strong influence on the adsorption capacity and sorption mechanism on chitosan. In this work, the adsorption capacity of the heavy metal ions manganese, iron, cobalt, nickel, copper, and zinc were investigated in dependence on their corresponding anions sulfate, chloride, and nitrate by batch experiments. The selectivity of the different heavy metal ions was analyzed by column experiments.
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Kan Y, Yang Q, Tan Q, Wei Z, Chen Y. Diminishing Cohesion of Chitosan Films in Acidic Solution by Multivalent Metal Cations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:4964-4974. [PMID: 32308004 DOI: 10.1021/acs.langmuir.0c00438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Chitosan is a natural polymer with good biocompatibility, biodegradability, and bioactivity that has great potential for biomedical and industrial applications. Like other natural sugar-based polymers, chitosan molecules own versatile adhesion abilities to bind with various surfaces, owing to multiple functional moieties contained in the chain. To develop the promising biomaterials based on the chitosan chemistry, it is fundamentally important to figure out its adhesion mechanism under a certain condition, which leaves us numbers of open questions. In this work, we characterized the chitosan films adsorbed on a mica substrate in acidic solution and investigated the effects of multivalent salts on the cohesive behaviors of the films by means of the surface forces apparatus. The results showed that the cohesion capacities of chitosan films were reduced to around 30% of their original states after the addition of 10-7 M LaCl3 into 150 mM acetic acid, which could be partially recovered by holding the films at the contact position for a longer time. Surprisingly, the cohesion loss in the films exhibited the dependence on the properties of the metal cations including valance and concentration. The topography of the chitosan-coated surface also showed obvious aggregation in the presence of submicromolar of the salts. Here, we attributed these phenomena regarding cohesion loss to the mechanisms involved in the absorption of metal cations by the chitosan chains, which not only consumed the binding sites but also induced conformation change in the polymer network. Our findings may offer a suggestion for the production of chitosan-based materials to notice the potential impacts of ultralow concentrated salts that are usually neglected even under acidic conditions.
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Affiliation(s)
- Yajing Kan
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, and School of Mechanical Engineering, Southeast University, Nanjing 211189, China
| | - Qiang Yang
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, and School of Mechanical Engineering, Southeast University, Nanjing 211189, China
| | - Qiyan Tan
- School of Mechanical Engineering, Nanjing Institute of Technology, Nanjing 211167, China
| | - Zhiyong Wei
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, and School of Mechanical Engineering, Southeast University, Nanjing 211189, China
| | - Yunfei Chen
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, and School of Mechanical Engineering, Southeast University, Nanjing 211189, China
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Weißpflog J, Boldt R, Kohn B, Scheler U, Jehnichen D, Tyrpekl V, Schwarz S. Investigation of mechanisms for simultaneous adsorption of iron and sulfate ions onto chitosan with formation of orthorhombic structures. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124575] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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31
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Karoui S, Ben Arfi R, Mougin K, Ghorbal A, Assadi AA, Amrane A. Synthesis of novel biocomposite powder for simultaneous removal of hazardous ciprofloxacin and methylene blue: Central composite design, kinetic and isotherm studies using Brouers-Sotolongo family models. JOURNAL OF HAZARDOUS MATERIALS 2020; 387:121675. [PMID: 31767503 DOI: 10.1016/j.jhazmat.2019.121675] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 10/20/2019] [Accepted: 11/11/2019] [Indexed: 05/27/2023]
Abstract
Over the past decades, extensive efforts have been made to use biomass-based-materials for wastewater-treatment. The first purpose of this study was to develop and characterize regenerated-reed/reed-charcoal (RR-ChR), an enhanced biosorbent from Tunisian-reed (Phragmites-australis). The second aim was to assess and optimize the RR-ChR use for the removal of binary ciprofloxacin antibiotic (CIP) and methylene blue dye (MB), using Central Composite Design under Response Surface methodology. The third purpose was to explain the mechanisms involved in the biosorption-process. The study revealed that the highest removal-percentages (76.66 % for the CIP and 100 % for the MB) were obtained under optimum conditions: 1.55 g/L of adsorbent, 35 mg/L of CIP, 75 mg/L of MB, a pH of 10.42 and 115.28 min contact time. It showed that the CIP biosorption mechanism was described by Brouers-Sotolongo-fractal model, with regression-coefficient (R2) of 0.9994 and a Person's Chi-square (X2) of 0.01. The Hill kinetic model better described the MB biosorption (R2 = 1 and X2 = 1.0E-4). The isotherm studies showed that the adsorbent surface was heterogeneous and the best nonlinear-fit was obtained with the Jovanovich (R2 = 0.9711), and Brouers-Sotolongo (R2 = 0.9723) models, for the CIP and MB adsorption, respectively. Finally, the RR-ChR lignocellulosic-biocomposite-powder could be adopted as efficient and cost-effective adsorbent.
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Affiliation(s)
- Sarra Karoui
- Research Laboratory LR18ES33, National Engineering School of Gabes, University of Gabes, Tunisia; National Engineering School of Sfax, University of Sfax, Tunisia; Univ Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France.
| | - Rim Ben Arfi
- Research Laboratory LR18ES33, National Engineering School of Gabes, University of Gabes, Tunisia
| | - Karine Mougin
- Institute of Materials Science of Mulhouse, CNRS - UMR 7361, University of Haute-Alsace, France
| | - Achraf Ghorbal
- Research Laboratory LR18ES33, National Engineering School of Gabes, University of Gabes, Tunisia; Higher Institute of Applied Sciences and Technology of Gabes, University of Gabes, Tunisia
| | - Aymen Amine Assadi
- Univ Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Abdeltif Amrane
- Univ Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
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Vafakish B, Wilson LD. Cu(II) Ion Adsorption by Aniline Grafted Chitosan and Its Responsive Fluorescence Properties. Molecules 2020; 25:molecules25051052. [PMID: 32110994 PMCID: PMC7179099 DOI: 10.3390/molecules25051052] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 02/18/2020] [Accepted: 02/24/2020] [Indexed: 12/03/2022] Open
Abstract
The detection and removal of heavy metal species in aquatic environments is of continued interest to address ongoing efforts in water security. This study was focused on the preparation and characterization of aniline grafted chitosan (CS-Ac-An), and evaluation of its adsorption properties with Cu(II) under variable conditions. Materials characterization provides support for the grafting of aniline onto chitosan, where the kinetic and thermodynamic adsorption properties reveal a notably greater uptake (>20-fold) of Cu(II) relative to chitosan, where the adsorption capacity (Qm) of CS-Ac-An was 106.6 mg/g. Adsorbent regeneration was demonstrated over multiple adsorption-desorption cycles with good uptake efficiency. CS-Ac-An has a strong fluorescence emission that undergoes prominent quenching at part per billion levels in aqueous solution. The quenching process displays a linear response over variable Cu(II) concentration (0.05–5 mM) that affords reliable detection of low level Cu(II) levels by an in situ “turn-off” process. The tweezer-like chelation properties of CS-Ac-An with Cu(II) was characterized by complementary spectroscopic methods: IR, NMR, X-ray photoelectron (XPS), and scanning electron microscopy (SEM). The role of synergistic effects are inferred among two types of active adsorption sites: electron rich arene rings and amine groups of chitosan with Cu(II) species to afford a tweezer-like binding modality.
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Synthesis of graphene oxide nanoribbons/chitosan composite membranes for the removal of uranium from aqueous solutions. Front Chem Sci Eng 2020. [DOI: 10.1007/s11705-019-1898-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Ban Z, Zhang J, Li L, Luo Z, Wang Y, Yuan Q, Zhou B, Liu H. Ginger essential oil-based microencapsulation as an efficient delivery system for the improvement of Jujube (Ziziphus jujuba Mill.) fruit quality. Food Chem 2020; 306:125628. [PMID: 31629297 DOI: 10.1016/j.foodchem.2019.125628] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 09/27/2019] [Accepted: 09/30/2019] [Indexed: 12/28/2022]
Abstract
Microencapsulation of Zingiber officinale essential oil (EO) in polysaccharide, chitosan (CH) and sodium carboxymethyl cellulose (CMC) based on the electrostatic interaction between charged polysaccharides at pH 3.0 in dual delivery system. Ratio variations of CH and CMC in microencapsulation were studied at 1:2, 2:1 and 1:1. This study aimed to evaluate the influence of the encapsulating materials combination on freeze-dried EO powders and to present the mechanisms for loading and releasing EO involved in the preparation of CH/CMC microcapsules. The spectroscopy analysis, physical properties, microstructural, encapsulation efficiency and EO release behavior in obtained EO microparticles were evaluated by using the analysis of fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and gas chromatography mass spectrometry (GC-MS), respectively. Afterwards, the above prepared microcapsules were applied on winter jujube fruit (Ziziphus jujuba Mill.) preservation. Results demonstrated that both the microstructure and stability of microencapsulation were improved in delivery system loading with CH and CMC (1:1) with the encapsulation efficiency of 88.50%, compared to other ratios of CH and CMC (1:2 and 2:1). Furthermore, the microencapsulation had a capacity to control and reduce the EO release, therefore the morphological and sensory quality of jujube fruits in EO delivery system during storage was enhanced significantly (P < 0.05), in comparison to control. Results revealed that the microparticles produced with CH and CMC (1:1) was considered to present better characteristics of microstructure, encapsulation efficiency, as well as to maintain higher nutritional quality for jujube fruit. Thus, EO microencapsulation loaded in CH/CMC-based dual delivery system has potential application and developmental value prospects in food industries.
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Affiliation(s)
- Zhaojun Ban
- School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Zhejiang Provincial Key Laboratory of Chemical and Biological Processing Technology of Farm Products, Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, Hangzhou 310023, China; Tianjin Gasin-DH Preservation Technology Co., Ltd, Tianjin 300300, China.
| | - Jinglin Zhang
- School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Zhejiang Provincial Key Laboratory of Chemical and Biological Processing Technology of Farm Products, Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, Hangzhou 310023, China
| | - Li Li
- Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
| | - Zisheng Luo
- Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
| | - Yongjiang Wang
- School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Zhejiang Provincial Key Laboratory of Chemical and Biological Processing Technology of Farm Products, Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, Hangzhou 310023, China
| | - Qiuping Yuan
- School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Zhejiang Provincial Key Laboratory of Chemical and Biological Processing Technology of Farm Products, Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, Hangzhou 310023, China
| | - Bin Zhou
- Zhejiang Silver-Elephant Bio-engineering Co., Ltd, Taizhou 317200, China.
| | - Haidong Liu
- Tianjin Gasin-DH Preservation Technology Co., Ltd, Tianjin 300300, China
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Zhang C, Liu S, Li S, Tao Y, Wang P, Ma X, Chen L. Enahanced biosorption of Cu(II) by magnetic chitosan microspheres immobilized Aspergillus sydowii (MCMAs) from aqueous solution. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123813] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Bucatariu F, Ghiorghita CA, Schwarz D, Boita T, Mihai M. Layer-by-layer polyelectrolyte architectures with ultra-fast and high loading/release properties for copper ions. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123704] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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37
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Ding R, Lisak G. Sponge-based microfluidic sampling for potentiometric ion sensing. Anal Chim Acta 2019; 1091:103-111. [PMID: 31679563 DOI: 10.1016/j.aca.2019.09.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/19/2019] [Accepted: 09/09/2019] [Indexed: 11/17/2022]
Abstract
This work demonstrates an application of the new materials, sponges, for the use in microfluidic solution sampling integrated with ion-selective electrodes. The microfluidic sponge-based sampling was developed and studied as novel sampling and sample handling method to serve as alternative for microfluidic paper- and textile-based sampling for ion analysis in various environmental (Cd2+, Pb2+ and pH) and clinically (K+, Na+, Cl-) relevant samples. Three types of polyurethane, cellulose and natural sponges were used as substrates for microfluidic solution sampling. Polyurethane based sponge was found to have low heavy metal sorption capacity thus it was recognized as suitable for microfluidic sampling coupled with solid-state as well as solid-contact ion-selective electrodes. The application of sponge-based microfluidic sampling, contrary to previous findings of paper- and textile-based microfluidic sampling, allowed measurements of heavy metals without prior modification of the sampling substrate. Finally, the determination of potassium, sodium and chloride in wastewater sludge and sweat samples done with sponge-based microfluidic sampling integrated with ISEs was found similar to analysis done by ICP-OES and IC.
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Affiliation(s)
- Ruiyu Ding
- College of Engineering, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Grzegorz Lisak
- College of Engineering, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore; Nanyang Environment and Water Research Institute, Residues and Resource Reclamation Center, 1 Cleantech Loop, Cleantech, Singapore, 637141, Singapore.
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38
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Dalisson B, Barralet J. Bioinorganics and Wound Healing. Adv Healthc Mater 2019; 8:e1900764. [PMID: 31402608 DOI: 10.1002/adhm.201900764] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 07/19/2019] [Indexed: 12/18/2022]
Abstract
Wound dressings and the healing enhancement (increasing healing speed and quality) are two components of wound care that lead to a proper healing. Wound care today consists mostly of providing an optimal environment by removing waste and necrotic tissues from a wound, preventing infections, and keeping the wounds adequately moist. This is however often not enough to re-establish the healing process in chronic wounds; with the local disruption of vascularization, the local environment is lacking oxygen, nutrients, and has a modified ionic and molecular concentration which limits the healing process. This disruption may affect cellular ionic pumps, energy production, chemotaxis, etc., and will affect the healing process. Biomaterials for wound healing range from simple absorbents to sophisticated bioactive delivery vehicles. Often placing a material in or on a wound can change multiple parameters such as pH, ionic concentration, and osmolarity, and it can be challenging to pinpoint key mechanism of action. This article reviews the literature of several inorganic ions and molecules and their potential effects on the different wound healing phases and their use in new wound dressings.
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Affiliation(s)
| | - Jake Barralet
- Faculty of DentistryMcGill University Montreal H3A 1G1 QC Canada
- Division of OrthopaedicsDepartment of SurgeryFaculty of MedicineMcGill University Montreal H4A 0A9 QC Canada
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Nikiforova T, Kozlov V, Islyaikin M. Regularities and mechanism of heavy metal cations sorption and (or) proton desorption by chitosan from aqueous solutions. CAN J CHEM 2019. [DOI: 10.1139/cjc-2018-0384] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The sorption process of heavy metal ions from aqueous solutions using chitosan flakes and chitosan beads was studied. Chitosan gel beads were prepared using covalent crosslinking of chitosan chains by epichlorohydrin with ionic gelation by sodium tripolyphosphate. The capability of chitosan beads to absorb the heavy metal ions from aqueous solutions was studied, and the physicochemical characteristics of the sorbent were evaluated using SEM and FTIR on the model solution treatment. It was found that competitive proton sorption takes place in acidic media, which results in a transformation of amino groups into inactive ammonium-salt form and decreases in heavy metal sorption onto chitosan from aqueous acidic media. Batch adsorption experiments were performed to examine the influence of various factors such as the initial concentration of metal salts, pH, and agitation duration on the process. It was established that metal ion sorption is pH dependent and has an optimum effect at a pH of 6.0. Following the Langmuir equation, the maximum sorption of Cu2+ions is estimated to be 1,6 mol/kg of modified chitosan. The kinetic study revealed that the adsorption kinetics are well-fitted to the kinetic equation of pseudo second order. Thus, sorption of heavy metal ions by chitosan is considered to be a competitive process that occurs on amino groups of the sorbent with equivalent coordinated participation of metal cations, protons, and anions.
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Affiliation(s)
- T.E. Nikiforova
- Ivanovo State University of Chemistry and Technology, Sheremetevskiy Avenue, 7, Ivanovo, Russia
- Ivanovo State University of Chemistry and Technology, Sheremetevskiy Avenue, 7, Ivanovo, Russia
| | - V.A. Kozlov
- Ivanovo State University of Chemistry and Technology, Sheremetevskiy Avenue, 7, Ivanovo, Russia
- Ivanovo State University of Chemistry and Technology, Sheremetevskiy Avenue, 7, Ivanovo, Russia
| | - M.K. Islyaikin
- Ivanovo State University of Chemistry and Technology, Sheremetevskiy Avenue, 7, Ivanovo, Russia
- Ivanovo State University of Chemistry and Technology, Sheremetevskiy Avenue, 7, Ivanovo, Russia
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Wang A, Zhu Q, Xing Z. Design and synthesis of a calcium modified quaternized chitosan hollow sphere for efficient adsorption of SDBS. JOURNAL OF HAZARDOUS MATERIALS 2019; 369:342-352. [PMID: 30784964 DOI: 10.1016/j.jhazmat.2019.02.047] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 01/28/2019] [Accepted: 02/12/2019] [Indexed: 06/09/2023]
Abstract
In this study, a new pleated hollow sphere material (CS@Ca@CTA) was prepared by mixing chitosan (CS) and calcium chloride (CaCl2) in acetic acid solutions followed by crosslinking with glutaraldehyde (GA), and quaternized using (3-chloro-2 hydroxypropyl) trimethylammonium chloride (CTA). The natural biopolymer chitosan (CS) was used to prepare an environmentally friendly adsorbent material which can efficiently adsorb sodium dodecylbenzene sulfonate (SDBS). The adsorption of SDBS on CS@Ca@CTA can be efficiently improved by CTA at different pH values and Ca can promote the precipitation. The adsorption process of SDBS is as follows. First, SDBS can be adsorbed by electrostatic attraction and Cl- of CTA is used to ion exchange DBS- of SDBS. Then DBS- can bind stably with the Ca2+ in a bidentate form. Furthermore, CS contains NH2 and OH groups, which can provide enormous vacant active sites to adsorb SDBS, and a pleated surface have an ability to capture SDBS. The results indicated that the saturated adsorption capacity of CS@Ca@CTA up to 2300 mg g-1 at pH 3.0 within 240 min. Additionally, adsorption kinetics, isotherm and thermodynamic parameters were discussed. The aim of this article is to present CS@Ca@CTA, which has a great effect on adsorbing the SDBS.
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Affiliation(s)
- Aiwen Wang
- School of Chemistry and Materials Science, Heilongjiang University, Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, Harbin, 150080, China
| | - Qi Zhu
- School of Chemistry and Materials Science, Heilongjiang University, Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, Harbin, 150080, China.
| | - Zipeng Xing
- School of Chemistry and Materials Science, Heilongjiang University, Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, Harbin, 150080, China.
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41
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Marques Neto JDO, Bellato CR, Silva DDC. Iron oxide/carbon nanotubes/chitosan magnetic composite film for chromium species removal. CHEMOSPHERE 2019; 218:391-401. [PMID: 30476771 DOI: 10.1016/j.chemosphere.2018.11.080] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 11/08/2018] [Accepted: 11/12/2018] [Indexed: 06/09/2023]
Abstract
An adsorbent in the form of a CLCh/MWCNT/Fe film was prepared using multiple walled carbon nanotubes (MWCNT) doped with magnetic iron oxide and deposited in crosslinked chitosan (CLCh). The CLCh/MWCNT/Fe was characterized by Inductively Coupled Plasma Mass Spectrometry (ICP-MS), nitrogen (N2) adsorption/desorption, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometry (EDS), Infrared Spectroscopy (IR) and Raman Spectroscopy. The CLCh/MWCNT/Fe film presented a maximum adsorption capacity for Cr(III) of 66.25 mg/g (150 min) and for Cr(VI) of 449.30 mg/g (60 min) at 25 °C. The CLCh/MWCNT/Fe can be easily removed from the aqueous solution by a mechanical separation or by magnetization due to its magnetic properties. In ten consecutive reutilization adsorption cycles the CLCh/MWCNT/Fe film presented efficiency losses of only 12% and 6% for the removal of Cr(III) and Cr(VI), respectively.
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Affiliation(s)
| | - Carlos Roberto Bellato
- Departamento de Química, Universidade Federal de Viçosa, Av. PH Holfs, s/n, 36571-000 Viçosa, Minas Gerais, Brazil.
| | - Danilo de Castro Silva
- Departamento de Química, Universidade Federal de Viçosa, Av. PH Holfs, s/n, 36571-000 Viçosa, Minas Gerais, Brazil.
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Bandara S, Carnegie CA, Johnson C, Akindoju F, Williams E, Swaby JM, Oki A, Carson LE. Synthesis and characterization of Zinc/Chitosan-Folic acid complex. Heliyon 2018; 4:e00737. [PMID: 30167495 PMCID: PMC6113674 DOI: 10.1016/j.heliyon.2018.e00737] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 06/19/2018] [Accepted: 08/13/2018] [Indexed: 01/26/2023] Open
Abstract
Therapeutic drug delivery systems using polymeric materials is an emerging field of research. However, the use of certain polymers has gained much-needed attention by the researchers due to their low toxic nature. In recent years, chitosan has gained popularity as a potential biodegradable polymer that can be used as a component in drug delivery systems. In this study, we synthesized a chitosan derivative that is composed of both folic acid and zinc and may serve as a viable component of a drug delivery system. The results of Fourier Transform Infrared Spectroscopy (FTIR), solid-state 13C Nuclear Magnetic Resonance Spectroscopy (NMR) and UV-visible Spectroscopy demonstrated a substantial difference between chitosan and ZnS/Chitosan-Folic acid derivative. The results were also confirmed using Thermogravimetric Analysis (TGA) and Scanning Electron Microscopy/Energy Dispersive X-ray Spectroscopy (SEM-EDS) techniques. The average particle size of the ZnS/Chitosan-Folic acid system was measured to be 463.67 ± 5.76 nm, showing that the product is within the nano-size range.
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Affiliation(s)
- Subhani Bandara
- Cooperative Agricultural Research Center, Prairie View A&M University, Prairie View, TX 77446, USA
| | - Codi-anne Carnegie
- Cooperative Agricultural Research Center, Prairie View A&M University, Prairie View, TX 77446, USA
| | - Chevaun Johnson
- Cooperative Agricultural Research Center, Prairie View A&M University, Prairie View, TX 77446, USA
| | - Feyisayo Akindoju
- Cooperative Agricultural Research Center, Prairie View A&M University, Prairie View, TX 77446, USA
| | - Ebonee Williams
- Cooperative Agricultural Research Center, Prairie View A&M University, Prairie View, TX 77446, USA
| | - Julia M. Swaby
- Cooperative Agricultural Research Center, Prairie View A&M University, Prairie View, TX 77446, USA
| | - Aderemi Oki
- Department of Chemistry, Prairie View A&M University, Prairie View, TX 77446, USA
| | - Laura E. Carson
- Cooperative Agricultural Research Center, Prairie View A&M University, Prairie View, TX 77446, USA
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Chen Y, Zhao W, Yang X, Li Y. Efficient removal of heavy metal ions from aqueous solution by a novel poly (1-vinylimidazole) chelate resin. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2426-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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44
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Bakayoko M, Kalakodio L, Kalagodio A, Abo BO, Muhoza JP, Ismaila EM. Synthesis and characterization of the removal of organic pollutants in effluents. REVIEWS ON ENVIRONMENTAL HEALTH 2018; 33:135-146. [PMID: 29694331 DOI: 10.1515/reveh-2018-0004] [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: 01/29/2018] [Accepted: 03/08/2018] [Indexed: 06/08/2023]
Abstract
The use of a large number of organic pollutants results in the accumulation of effluents at the places of production and the environment. These substances are, therefore, dangerous for living organisms and can cause heavy environmental damage. Hence, to cure these problems certain methods were used for the elimination of organic effluents. Indeed, the methods of elimination through magnetic adsorption and/or separation prove to be effective in the treatment of certain wastes, but the effectiveness of each one of these methods depends on several characteristics and also present limitations according to the pollutants they adsorb. This review examines on the one hand the capacity of certain elements of these methods in the elimination of certain pollutants and on the other hand the advantages and limits of these methods. Elements like biochars, biosorbents and composite materials are used due to their very strong porosity which makes it possible for them to develop an important contact surface with the external medium, at low costs, and the possibility of producing them from renewable sources. The latter still run up however against the problems of formation of mud and regeneration. Depollution by magnetic separation is also used due to its capacity to mitigate the disadvantages of certain methods which generally lead to the formation of mud and overcoming also the difficulties like obtaining an active material and at the same time being able to fix the pollutants present in the effluents to treat and sensitize them to external magnetic fields.
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Affiliation(s)
- Moussa Bakayoko
- University of Science and Technology, School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Xueyuan 30, Beijing 100083, P.R. China
| | - Loissi Kalakodio
- University of Science and Technology, School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, P.R. China
| | - Adiara Kalagodio
- School of Natural Science, Wuhan University Technology, Wuhan, China
| | - Bodjui Olivier Abo
- University of Science and Technology, School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, P.R. China
| | - Jean Pierre Muhoza
- University of Science and Technology, School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, P.R. China
| | - El Moctar Ismaila
- Beijing Institute of Technology, Energy of Environment Materials, Beijing, China
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Manirethan V, Raval K, Rajan R, Thaira H, Balakrishnan RM. Kinetic and thermodynamic studies on the adsorption of heavy metals from aqueous solution by melanin nanopigment obtained from marine source: Pseudomonas stutzeri. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 214:315-324. [PMID: 29533829 DOI: 10.1016/j.jenvman.2018.02.084] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 02/23/2018] [Accepted: 02/23/2018] [Indexed: 05/19/2023]
Abstract
The difficulty in removal of heavy metals at concentrations below 10 mg/L has led to the exploration of efficient adsorbents for removal of heavy metals. The adsorption capacity of biosynthesized melanin for Mercury (Hg(II)), Chromium (Cr(VI)), Lead (Pb(II)) and Copper (Cu(II)) was investigated at different operating conditions like pH, time, initial concentration and temperature. The heavy metals adsorption process was well illustrated by the Lagergren's pseudo-second-order kinetic model and the equilibrium data fitted excellently to Langmuir isotherm. Maximum adsorption capacity obtained from Langmuir isotherm for Hg(II) was 82.4 mg/g, Cr(VI) was 126.9 mg/g, Pb(II) was 147.5 mg/g and Cu(II) was 167.8 mg/g. The thermodynamic parameters revealed that the adsorption of heavy metals on melanin is favorable, spontaneous and endothermic in nature. Binding of heavy metals on melanin surface was proved by Fourier Transform Infrared Spectroscopy (FT-IR) and X-ray Photoelectron Spectroscopy (XPS). Contemplating the results, biosynthesized melanin can be a potential adsorbent for efficient removal of Hg(II), Cr(VI), Pb(II) and Cu(II) ions from aqueous solution.
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Affiliation(s)
- Vishnu Manirethan
- Department of Chemical Engineering, National Institute of Technology Karnataka, Mangalore 575025, India
| | - Keyur Raval
- Department of Chemical Engineering, National Institute of Technology Karnataka, Mangalore 575025, India.
| | - Reju Rajan
- Department of Chemical Engineering, National Institute of Technology Karnataka, Mangalore 575025, India
| | - Harsha Thaira
- Department of Chemical Engineering, National Institute of Technology Karnataka, Mangalore 575025, India
| | - Raj Mohan Balakrishnan
- Department of Chemical Engineering, National Institute of Technology Karnataka, Mangalore 575025, India.
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Paper-Based Sensor Chip for Heavy Metal Ion Detection by SWSV. MICROMACHINES 2018; 9:mi9040150. [PMID: 30424084 PMCID: PMC6187316 DOI: 10.3390/mi9040150] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 03/24/2018] [Accepted: 03/26/2018] [Indexed: 12/25/2022]
Abstract
Heavy metal ion pollution problems have had a terrible influence on human health and the environment. Therefore, the monitoring of heavy metal ions is of great practical significance. In this paper, an electrochemical three-electrode system was fabricated and integrated on nitrocellulose membrane (NC) by the use of magnetron sputtering technology, which exhibited a uniform arrangement of porous structure without further film modification. This paper-based sensor chip was used for Cu2+ detection by square-wave stripping voltammetry (SWSV). Within the ranges of 5–200 μg·L−1 and 200–1000 μg·L−1, it showed good linearity of 99.58% and 98.87%, respectively. The limit of detection was 2 μg·L−1. On the basis of satisfying the detection requirements (10 μg·L−1), the integrated sensor was small in size and inexpensive in cost. Zn2+, Cd2+, Pb2+ and Bi3+ were also detected by this paper-based sensor chip with good linearity.
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Chitosan/CaCO 3-silane nanocomposites: Synthesis, characterization, in vitro bioactivity and Cu(II) adsorption properties. Int J Biol Macromol 2018; 114:149-160. [PMID: 29559316 DOI: 10.1016/j.ijbiomac.2018.03.076] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 03/10/2018] [Accepted: 03/15/2018] [Indexed: 01/09/2023]
Abstract
Chitosan nanocomposites containing 2, 5, 8wt% of calcium carbonate-γ-aminopropyl triethoxy silane (CS/CC-ATS NCs) were prepared by ultrasonic irradiation. After characterizing of physicochemical properties of the obtained CS/CC-ATS NCs, their performance was evaluated for both the bone-like apatite mineralization and the removal of Cu(II). The field emission-scanning electron microscopy images from the in vitro bioactivity of the CS and the CS/CC-ATS NC 5wt% displayed that the hydroxyapatite was produced on the samples surface. However, the distribution of it on the surface of CS/CC-ATS NC 5wt% was better than the pure CS. The uptake of Cu(II) on the CS/CC-ATS NC 5wt% was studied under different adsorption conditions such as contact time, the initial concentration of metal ion and adsorbent amount. The results of isothermal adsorption of the pure CS and the CS/CC-ATS NC 5wt% were well fitted by Langmuir model for Cu(II) with adsorption capacity of 33.33 and 33.90mg·g-1, respectively. As a result, the CS/CC-ATS NC has great potencies in both the bone tissue engineering and the uptake of toxic metal from solution.
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Mende M, Schwarz D, Steinbach C, Boldt R, Schwarz S. The Influence of Salt Anions on Heavy Metal Ion Adsorption on the Example of Nickel. MATERIALS 2018; 11:ma11030373. [PMID: 29510485 PMCID: PMC5872952 DOI: 10.3390/ma11030373] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Revised: 02/11/2018] [Accepted: 02/22/2018] [Indexed: 12/01/2022]
Abstract
The biodegradable polysaccharide chitosan possesses protonated and natural amino groups at medium pH values and has therefore been used as an adsorbing material for nickel salts in water treatment. Nickel is a problematic heavy metal ion which can cause various diseases and disorders in living organisms. Here, we show the influence of oxyanions (e.g., nitrate and sulfate) to the adsorption of nickel ions. Hence, simultaneously we are addressing the increasing global problem of nitrate and sulfate ion pollution in groundwater and surface water. A series of adsorption experiments was carried out in order to determine (i) the adsorption equilibrium, (ii) the adsorption capacity in dependence on the initial nickel ion concentration, and (iii) the influence of the anion presented in solution for the adsorption capacity. Surface morphology of chitosan flakes before and after the adsorption process has been studied with SEM-EDX analysis. The chitosan flakes exhibited promising adsorption capacities of 81.9 mg·g−1 and 21.2 mg·g−1 for nickel (sulfate) and nickel (nitrate), respectively. The calculated values of Gibbs free energy change ΔG0 confirm the higher adsorption of nickel ions in presence of sulfate ions. Hence, higher anion valence leads to a higher adsorption capacity.
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Affiliation(s)
- Mandy Mende
- Leibniz-Institut fuer Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany.
| | - Dana Schwarz
- Leibniz-Institut fuer Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany.
| | - Christine Steinbach
- Leibniz-Institut fuer Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany.
| | - Regine Boldt
- Leibniz-Institut fuer Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany.
| | - Simona Schwarz
- Leibniz-Institut fuer Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany.
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Xu Z, Wang K, Liu Q, Guo F, Xiong Z, Li Y, Wang Q. A bifunctional adsorbent of silica gel-immobilized Schiff base derivative for simultaneous and selective adsorption of Cu(II) and SO42−. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.09.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Ma H, Tsai SB. Design of Research on Performance of a New Iridium Coordination Compound for the Detection of Hg 2. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14101232. [PMID: 29035349 PMCID: PMC5664733 DOI: 10.3390/ijerph14101232] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 09/25/2017] [Accepted: 10/03/2017] [Indexed: 11/16/2022]
Abstract
Heavy metal pollution has become one of the most significant pollution problems encountered by our country in terms of environment protection. In addition to the significant effects of heavy metals on the human body and other organisms through water, food chain enrichment and other routes, heavy metals involved in daily necessities beyond the level limit could also affect people’s lives, so the detection of heavy metals is extremely important. Ir (III) coordination compound, considered to be one of the best phosphorescent sensing materials, is characterized by high luminous efficiency, easy modification of the ligand and so on, and it has potential applications in the field of heavy metal detection. This project aims to product a new Ir (III) functional coordination compound by designing a new auxiliary ligand and a main ligand with a sulfur identification unit, in order to systematically investigate the application of iridium coordination compound in the detection of the heavy metal Hg2+. With the introduction of the sulfur identification unit, selective sensing of Hg2+ could be achieved. Additionally, a new auxiliary ligand is also introduced to produce a functional iridium coordination compound with high quantum efficiency, and to diversify the application of iridium coordination compound in this field.
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Affiliation(s)
- Hailing Ma
- School of Science, Jinggangshan University, Ji'an 343009, China.
- College of Chemical Engineering and Biological Engineering, Zhejiang University, Hangzhou 310000, Zhejiang, China.
| | - Sang-Bing Tsai
- Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 52800, Guangdong, China.
- Economics and Management College, Civil Aviation University of China, Tianjin 300300, China.
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