Adsorption performances and antimicrobial activity of the nanosilver modified montmorillonite clay

Stevanović, Maja; Bajić, Zoran; Veličković, Zlate; Karkalić, Radovan; Pecić, Ljiljana; Otřísal, Pavel; Marinković, Аleksandar

doi:10.5004/dwt.2020.25451

Cited by 5 publications

(3 citation statements)

References 54 publications

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“…The use of pGME-en as an effective adsorbent for Au recovery from acid solutions gives the possibility for the preparation of functional gold polymer composite particles, via the reduction and deposition of Au(0) nanoparticles onto the pGME-en surface. Since gold nanoparticle-coated materials can be used in various applications, such as catalysis [16], antimicrobial nanocoatings [63], and water purification [64], a detailed characterization of obtained pGME-en/Au is needed.…”

Section: Characterization Of Gold Polymer Compositementioning

confidence: 99%

“…Preliminary results indicated that the water-insoluble gold polymer composite, with a tunable particle size and surface chemistry, can be considered as a potential antibacterial material and may be able to be used to inhibit bacterial growth in various industrial and biomedical applications, such as water purification, wound dressings, bacterial responsive coatings, etc. [64,67]. Further investigations will focus on improving the antimicrobial efficiency, to design recyclable and reusable materials with long-lasting responses.…”

Section: Antimicrobial Evaluation Of Gold Polymer Compositementioning

confidence: 99%

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Fast Gold Recovery from Aqueous Solutions and Assessment of Antimicrobial Activities of Novel Gold Composite

Tadić,

Marković,

Vuković

et al. 2023

Metals

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A novel porous gold polymer composite was prepared by the functionalization of a glycidyl methacrylate-based copolymer (pGME) with ethylene diamine (pGME-en), and activation by gold (pGME-en/Au), in a simple batch adsorption procedure in an acid solution, at room temperature. Detailed characterization of the pGME-en before and after activation was performed. The main focuses of this research were the design of a method that can enable the recovery of gold and the reuse of this multipurpose sorbent as an antimicrobial agent. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis pointed out amine groups as the primary binding sites for Au activation, while hydroxyl groups also contributed to the chelation reaction. pGME-en exhibited fast gold adsorption with an adsorption half-time of 5 min and an equilibrium time of 30 min. The maximal adsorption capacity was about 187 mg/g. The analysis of sorption experimental data with a non-linear surface reaction and diffusion-based kinetic models revealed the pseudo-second-order and Avrami model as the best fit, with unambiguous control by liquid film and intra-particle diffusion. The biological activity studies against Staphylococcus aureus, Listeria monocytogenes, Escherichia coli, and Candida albicans revealed moderate activity of pGME-en/Au against different bacterial and fungal species. pGME-en/Au was stable in a saline solution, with a release of approximately 2.3 mg/g after 24 h.

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Section: Characterization Of Gold Polymer Compositementioning

confidence: 99%

Section: Antimicrobial Evaluation Of Gold Polymer Compositementioning

confidence: 99%

Fast Gold Recovery from Aqueous Solutions and Assessment of Antimicrobial Activities of Novel Gold Composite

Tadić,

Marković,

Vuković

et al. 2023

Metals

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“…Therefore, the attention of researchers is increasingly focused on finding a cheap, environmentally friendly, and highly efficient adsorbent to solve this problem. Various adsorbents such as agricultural by-products, waste materials, cheap minerals and biomass have been used to remove various pollutants from wastewater (Chatterjee et al, 2010;Pantić et al, 2019;Bajić et al, 2013;Stevanović et al, 2020;Karanac et al, 2018;Perendija et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Pulverized river shellfish shells as a 904 cheap adsorbent for removing of malathion from water: Examination of the isotherms, kinetics, thermodynamics and optimization of the experimental conditions by the response surface method

Veličković¹,

Vujičić²,

Stojanović³

et al. 2021

Vojnotehnički glasnik

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Introduction/purpose: In this study, we investigated the possibility of removing the organophosphorus pesticide malathion from water using a new adsorbent based on the biowaste of river shell shards from the Anodonta Sinadonta woodiane family, a material that accumulates in large quantities as waste on the banks of large rivers. Two adsorbents were tested - mechanically comminuted river shells (MRM) and mechanosynthetic hydroxyapatite from comminuted river shells (RMHAp). Methods: The obtained adsorbents were characterized and tested for the removal of the organophosphorus pesticide malathion from water. In order to predict the optimal adsorption conditions using the Response Surface Method (RSM), the authors investigated the influence of variable factors (adsorption conditions), pH values, adsorbent doses, contact times, and temperatures on the adsorbent capacity. Results: The best adsorption of malathion was achieved at mean pH values between 6.0 and 7.0. The adsorption data for malathion at 25, 35, and 45 °C were compared using the Langmuir, Freundlich, DubininRadushkevich (DR), and Temkin isothermal models, as well as pseudofirst order, pseudo-second order and Elovic kinetic models for modeling adsorption kinetics. The maximum Langmuir adsorption capacity for MRM and RMHAp at 25 °C was 46,462 mg g-1 and 78,311 mg g-1 , respectively. Conclusion: The results have showed that malathion adsorption on both adsorbents follows the pseudo-second kinetic model and the Freundlich isothermal model. The thermodynamic parameters indicate the endothermic, feasible, and spontaneous nature of the adsorption process.

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Synthesis, characterization, cytotoxicity and antimicrobial activity of a nanostructured mineral clay

Druzian

Machado

Pappis

et al. 2023

Ceramics International

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Adsorption performances and antimicrobial activity of the nanosilver modified montmorillonite clay

Cited by 5 publications

References 54 publications

Fast Gold Recovery from Aqueous Solutions and Assessment of Antimicrobial Activities of Novel Gold Composite

Fast Gold Recovery from Aqueous Solutions and Assessment of Antimicrobial Activities of Novel Gold Composite

Pulverized river shellfish shells as a 904 cheap adsorbent for removing of malathion from water: Examination of the isotherms, kinetics, thermodynamics and optimization of the experimental conditions by the response surface method

Synthesis, characterization, cytotoxicity and antimicrobial activity of a nanostructured mineral clay

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