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Idrees M, Batool S, Rasheed H, Herath I, Bundschuh J, Niazi NK, Ahmad M, Xu J, Chen D. Adsorption-coupled Fenton type reduction of bromate in water by high-yield polymer-derived ceramic-supported nano-zerovalent iron. ENVIRONMENTAL RESEARCH 2024; 258:119419. [PMID: 38879107 DOI: 10.1016/j.envres.2024.119419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 06/09/2024] [Accepted: 06/12/2024] [Indexed: 06/22/2024]
Abstract
Nano-zerovalent iron (nZVI) is a promising material for the removal of both organic and inorganic pollutants from contaminated water. This study investigates the potential of a novel composite of nZVI on a polymer-derived supporting ceramic (nZVI-PDC) synthesized via the liquid-phase reduction method for the simultaneous adsorption and Fenton-type reduction of bromate anion (BrO3-) in water. The nZVI nanoparticles were effectively anchored onto the PDC by impregnating high-yield carbon in a ferrous sulfate solution. The PDC facilitated the uniform dispersion of nZVI nanoparticles due to its multiple active sites distributed within mesocarbon cavities. The developed nZVI-PDC composite exhibited a high specific surface area of 837 m2 g-1 and an ordered mesoporous structure with a pore volume of 0.37 cm3 g-1. As an adsorbent, the nZVI-PDC composite exhibited a maximum adsorption capacity (qe) of 842 mg g-1 and a partition coefficient (KH) of 10.2 mg g-1 μM-1, as calculated by the pseudo-second-order model. As a catalyst, the composite demonstrated a reaction kinetic rate of 43.5 μmol g-1 h-1 within 6 h at pH 4, using a dosage of 60 mg L-1 nZVI-PDC and a concentration of 0.8 mmol L-1 H2O2. Comparatively, PDC exhibited a qe of 408 mg g-1, KH of 1.67 mg g-1 μM-1, and a reaction rate of 20.8 μmol g-1 h-1, while nZVI showed a qe of 456 mg g-1, KH of 2.30 mg g-1 μM-1, and a reaction rate of 27.2 μmol g-1 h-1. The modelling indicated that the nZVI-PDC composite followed pseudo-second-order kinetics. The remarkable removal efficiency of the nZVI-PDC composite was attributed to the synergistic effects between PDC and nZVI, where PDC facilitated charge transfer, promoting Fe2+ generation and the Fe3+/Fe2+ cycle. Overall, this work introduces a promising adsorption technology for the efficient removal of BrO3- from contaminated aqueous solutions, highlighting the significant potential of the nZVI-PDC composite in water purification applications.
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Affiliation(s)
- Muhammad Idrees
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, PR China; State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, 230026, PR China; Guangdong Provincial Engineering Technology Research Center of Key Materials for High-Performance Copper Clad Laminates (KM-CCL), Dongguan, 523808, PR China.
| | - Saima Batool
- College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, 518060, PR China
| | - Hina Rasheed
- Department of Soil Science, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, 63100, Pakistan
| | - Indika Herath
- Faculty of Science, Engineering and Built Environment, Centre for Regional and Rural Futures, Deakin University, Waurn Ponds, VIC, 3216, Australia
| | - Jochen Bundschuh
- School of Engineering, Faculty of Health, Engineering and Sciences, The University of Southern Queensland West Street, 4350, QLD, Australia
| | - Nabeel Khan Niazi
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan
| | - Mahtab Ahmad
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Junguo Xu
- College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, 518060, PR China
| | - Deliang Chen
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, PR China; Guangdong Provincial Engineering Technology Research Center of Key Materials for High-Performance Copper Clad Laminates (KM-CCL), Dongguan, 523808, PR China.
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Benčina M, Rawat N, Paul D, Kovač J, Lakota K, Žigon P, Kralj-Iglič V, Iglič A, Junkar I. Enhanced Hemocompatibility and Cytocompatibility of Stainless Steel. ACS OMEGA 2024; 9:19566-19577. [PMID: 38708281 PMCID: PMC11064193 DOI: 10.1021/acsomega.4c01191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/12/2024] [Accepted: 04/04/2024] [Indexed: 05/07/2024]
Abstract
The present study introduces an advanced surface modification approach combining electrochemical anodization and non-thermal plasma treatment, tailored for biomedical applications on stainless steel grade 316L (SS316L) surfaces. Nanopores with various diameters (100-300 nm) were synthesized with electrochemical anodization, and samples were further modified with non-thermal oxygen plasma. The surface properties of SS316L surfaces were examined by scanning electron microscopy, atomic force microscopy, X-ray photoemission spectroscopy, and Water contact angle measurements. It has been shown that a combination of electrochemical anodization and plasma treatment significantly alters the surface properties of SS316L and affects its interactions with blood platelets and human coronary cells. Optimal performance is attained on the anodized specimen featuring pores within the 150-300 nm diameter range, subjected to subsequent oxygen plasma treatment; the absence of platelet adhesion was observed. At the same time, the sample demonstrated good endothelialization and a reduction in smooth muscle cell adhesion compared to the untreated SS316L and the sample with smaller pores (100-150 nm). This novel surface modification strategy has significant implications for improving biocompatibility and performance of SS316L in biomedical applications.
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Affiliation(s)
- Metka Benčina
- Department
of Surface Engineering, Joz̆ef Stefan
Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
- Laboratory
of Physics, Faculty of Electrical Engineering, University of Ljubljana, Tržaška 25, SI-1000 Ljubljana, Slovenia
| | - Niharika Rawat
- Laboratory
of Physics, Faculty of Electrical Engineering, University of Ljubljana, Tržaška 25, SI-1000 Ljubljana, Slovenia
| | - Domen Paul
- Department
of Surface Engineering, Joz̆ef Stefan
Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Janez Kovač
- Department
of Surface Engineering, Joz̆ef Stefan
Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Katja Lakota
- Department
of Rheumatology, University Medical Centre
Ljubljana, Vodnikova
62, SI-1000 Ljubljana, Slovenia
| | - Polona Žigon
- Department
of Rheumatology, University Medical Centre
Ljubljana, Vodnikova
62, SI-1000 Ljubljana, Slovenia
| | - Veronika Kralj-Iglič
- Laboratory
of Clinical Biophysics, Faculty of Health Sciences, University of Ljubljana, Zdravstvena pot 5, SI-1000 Ljubljana, Slovenia
| | - Aleš Iglič
- Laboratory
of Physics, Faculty of Electrical Engineering, University of Ljubljana, Tržaška 25, SI-1000 Ljubljana, Slovenia
- Laboratory
of Clinical Biophysics, Faculty of Medicine, University of Ljubljana, Vrazov trg 2, SI-1000 Ljubljana, Slovenia
| | - Ita Junkar
- Department
of Surface Engineering, Joz̆ef Stefan
Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
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Erdogan Y, Ercan B. Anodized Nanostructured 316L Stainless Steel Enhances Osteoblast Functions and Exhibits Anti-Fouling Properties. ACS Biomater Sci Eng 2023; 9:693-704. [PMID: 36692948 PMCID: PMC9930089 DOI: 10.1021/acsbiomaterials.2c01072] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Poor osseointegration and infection are among the major challenges of 316L stainless steel (SS) implants in orthopedic applications. Surface modifications to obtain a nanostructured topography seem to be a promising method to enhance cellular interactions of 316L SS implants. In this study, arrays of nanodimples (NDs) having controlled feature sizes between 25 and 250 nm were obtained on 316L SS surfaces by anodic oxidation (anodization). Results demonstrated that the fabrication of NDs increased the surface area and, at the same time, altered the surface chemistry of 316L SS to provide chromium oxide- and hydroxide-rich surface oxide layers. In vitro experiments showed that ND surfaces promoted up to a 68% higher osteoblast viability on the fifth day of culture. Immunofluorescence images confirmed a well-spread cytoskeleton organization on the ND surfaces. In addition, higher alkaline phosphate activity and calcium mineral synthesis were observed on the ND surfaces compared to non-anodized 316L SS. Furthermore, a 71% reduction in Staphylococcus aureus (S. aureus) and a 58% reduction in Pseudomonas aeruginosa (P. aeruginosa) colonies were observed on the ND surfaces having a 200 nm feature size compared to non-anodized surfaces at 24 h of culture. Cumulatively, the results showed that a ND surface topography fabricated on 316L SS via anodization upregulated the osteoblast viability and functions while preventing S. aureus and P. aeruginosa biofilm synthesis.
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Affiliation(s)
- Yasar
Kemal Erdogan
- Biomedical
Engineering Program, Middle East Technical
University, Ankara 06800, Turkey,Department
of Biomedical Engineering, Isparta University
of Applied Science, Isparta 32260, Turkey
| | - Batur Ercan
- Biomedical
Engineering Program, Middle East Technical
University, Ankara 06800, Turkey,Department
of Metallurgical and Materials Engineering, Middle East Technical University, Ankara 06800, Turkey,BIOMATEN,
METU Center of Excellence in Biomaterials and Tissue Engineering, Ankara 06800, Turkey,. Phone: +90 (312) 210-2513
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Feasibility study on Ti-15Mo-7Cu with low elastic modulus and high antibacterial property. Biometals 2022; 35:1225-1241. [PMID: 35996064 DOI: 10.1007/s10534-022-00438-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 08/16/2022] [Indexed: 12/14/2022]
Abstract
Titanium and titanium alloy with low density, high specific strength, good biological, excellent mechanical compatibility and easy to process have been widely used in the medical materials, but their application in orthopedics and dentistry often face bacterial infection, corrosion failure and stress shielding. In this paper, Ti-15Mo-7Cu (TM-7Cu) alloy was prepared by high vacuum non-consumable electric arc melting furnace and then treated by solution and aging treatment. The microstructure, mechanical properties, antibacterial properties and cytocompatibility were studied by X-ray diffraction, microhardness tester, electrochemical working station, antibacterial test and Live/Dead staining technology. The results have shown that the heat treatment significantly influenced the phase transformation, the precipitation of Ti2Cu phase, the elastic modulus and the antibacterial ability. With the extension of the aging time, the elastic modulus slightly increased and the antibacterial rate obviously increased. TM-7Cu alloy with a low elastic modulus of 83GPa and a high antibacterial rate of > 93% was obtained. TM-7Cu alloy showed no cytotoxicity to MC3T3. It was suggested that TM-7Cu might be a highly competitive medical material.
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