Antimicrobial and dye degradation application of fungi‐assisted silver nanoparticles and utilization of fungal retentate biomass for dye removal

2021 ◽  
Author(s):  
Deepak Gola ◽  
Pankaj Kumar Tyagi ◽  
Arvind Arya ◽  
Dhriti Gupta ◽  
Jyoti Raghav ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Dye Removal ◽  
Dye Degradation

Analysis of Primary Degradation and Decolourization of Dyes in Water by an H2O2/UV Advanced Oxidation Process

2008 ◽  
Vol 11 (3) ◽  
Author(s):  
Amaia Menendez ◽  
Jose Ignacio Lombraña ◽  
Ana de Luis
Keyword(s):  
Dye Removal ◽  
Advanced Oxidation Process ◽  
Rhodamine 6G ◽  
Dye Degradation ◽  
Water Solution ◽  
Synthetic Dyes ◽  
Dye Wastewater ◽  
First Order ◽  
Textile Dyeing ◽  
Colour Photography

AbstractSynthetic dyes are extensively used in textile dyeing, paper printing, colour photography, pharmaceuticals, food, cosmetics and other industries. In spite of their diversity there are a certain number of properties common to many dye compounds, such as aromatic constitution, chromophore groups and others. Similarly to other dyes and due to the formation of colour intermediates, in the case of Rhodamine 6G colour capacity is maintained in the initial steps of dye degradation. For this reason in the degradation of a dye it is necessary to distinguish between two processes that take place simultaneously: dye removal and decolourization. This study was conducted by using a water solution of 50 mg/L of Rhodamine 6G (Rh-6G), as a model of a dye wastewater, in the hydrogen peroxide/UV system. The kinetic model proposed in this paper for the removing of Rh- 6G is a sequential first-order reaction. This model describes acceptably the changes in two kinds of compound for a wide interval of H

Green synthesis, structural characterization, and catalytic activity of silver nanoparticles stabilized with Bridelia retusa leaf extract

2018 ◽  
Vol 7 (1) ◽  
pp. 30-37 ◽  
Author(s):  
Ramesh Vinayagam ◽  
Thivaharan Varadavenkatesan ◽  
Raja Selvaraj
Keyword(s):  
Silver Nanoparticles ◽  
Rhodamine B ◽  
Leaf Extract ◽  
Dye Degradation ◽  
Synthesis Method ◽  
Degradation Process ◽  
Spectroscopic Studies ◽  
Metallic Silver ◽  
X Ray ◽  
Bridelia Retusa

Abstract:An environmentally benign method to synthesize silver nanoparticles (SNPs) using the leaf extract ofBridelia retusawas developed. The UV-Vis absorption spectrum of the synthesized SNPs displayed a surface plasmon peak at 420 nm. Scanning electron microscopy (SEM) revealed the irregular shaped nanoparticles, and energy dispersive X-ray (EDX) ascertained the presence of metallic silver by showing a strong signal at 3 eV. The crystalline structure of metallic silver was confirmed by X-ray diffraction (XRD). The mean size of the SNPs was calculated as 16.21 nm. Fourier infrared (FT-IR) spectroscopic studies displayed specific bands for various functional groups and affirmed the function of reduction and stabilization of SNPs. The stability was endorsed by the zeta potential value of −18.1 mV. The results evidenced that this leaf extract-mediated synthesis method is eco-friendly, rapid, and cheap. The catalytic power of the SNPs was investigated for Rhodamine B dye degradation. The SNPs completely degraded Rhodamine B within 9 min; thus, the dye degradation process was very rapid. The pseudo-first order degradation constant was found out to be 0.1323 min−1. This paves the way for the future development of novel nano-catalysts to reduce environmental pollution.

scholarly journals Dye degradation, antimicrobial and larvicidal activity of silver nanoparticles biosynthesized from Cleistanthus collinus

2020 ◽  
Vol 27 (7) ◽  
pp. 1753-1759
Author(s):  
A. Amala Lourthuraj ◽  
M. Masilamani Selvam ◽  
M. Saddam Hussain ◽  
Abdel-Wahab A. Abdel-Warith ◽  
Elsayed M.I. Younis ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Larvicidal Activity ◽  
Dye Degradation

scholarly journals Catalytic Removal of Alizarin Red Using Chromium Manganese Oxide Nanorods: Degradation and Kinetic Studies

Catalysts ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1150
Author(s):  
Muhammad Hamza ◽  
Ataf Ali Altaf ◽  
Samia Kausar ◽  
Shahzad Murtaza ◽  
Nasir Rasool ◽  
...  
Keyword(s):  
Kinetic Model ◽  
Manganese Oxide ◽  
Dye Removal ◽  
Dye Degradation ◽  
Uv Light ◽  
Kinetic Studies ◽  
Research Area ◽  
Alizarin Red ◽  
X Ray ◽  
Catalytic Removal

Dye removal through photocatalytic degradation employing nanomaterials as catalysts is a growing research area. In current studies, photocatalytic alizarin red (AR) dye degradation has been investigated by designing a series of Cr based manganese oxide nanomaterials (MH1–MH5). Synthesized nanomaterials were characterized by powder X-ray diffraction, scanning electron microscopy/energy dispersive x-ray, Brunauer–Emmett–Teller, and photoluminescence techniques and were utilized for photocatalytic AR dye degradation under UV light. AR dye degradation was monitored by UV–visible spectroscopy and percent degradation was studied for the effect of time, catalyst dose, different dye concentrations, and different pH values of dye solution. All the catalysts have shown more than 80% dye degradation exhibiting good catalytic efficiencies for dye removal. The catalytic pathway was analyzed by applying the kinetic model. A pseudo second-order model was found the best fitted kinetic model indicating a chemically-rate controlled mechanism. Values of constant R2 for all the factors studied were close to unity depicting a good correlation between experimental data.

Silver nanoparticles deposited on polysiloxane networks as active catalysts in dye degradation

2020 ◽  
Vol 137 (39) ◽  
pp. 49170
Author(s):  
Monika Wójcik‐Bania ◽  
Edyta Stochmal ◽  
Dorota Duraczyńska
Keyword(s):  
Silver Nanoparticles ◽  
Dye Degradation

scholarly journals Improved Surface Functional and Photocatalytic Properties of Hybrid ZnO-MoS2-Deposited Membrane for Photocatalysis-Assisted Dye Filtration

Membranes ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 106 ◽  
Author(s):  
Saranya Rameshkumar ◽  
Rory Henderson ◽  
Ramesh Babu Padamati
Keyword(s):  
Membrane Filtration ◽  
Dye Removal ◽  
Dye Degradation ◽  
Irradiation Time ◽  
Complete Removal ◽  
Membrane Resistance ◽  
Bandgap Energy ◽  
Permeate Flux ◽  
Synergistic Mechanism ◽  
Surfactant Assisted

The synergistic mechanism of photocatalytic-assisted dye degradation has been demonstrated using a hybrid ZnO-MoS2-deposited photocatalytic membrane (PCM). Few layers of MoS2 sheets were produced using the facile and efficient surfactant-assisted liquid-phase exfoliation method. In this process, hydrophilic moieties of an anionic surfactant were adsorbed on the surface of MoS2, which aided exfoliation and promoted a stable dispersion due to the higher negative zeta potential of the exfoliated MoS2 sheets. Further, the decoration of ZnO on the exfoliated MoS2 sheets offered a bandgap energy reduction to about 2.77 eV, thus achieving an 87.12% degradation of methylene blue (MB) dye within 15 min of near UV-A irradiation (365 nm), as compared with pristine ZnO achieving only 56.89%. The photocatalysis-enhanced membrane filtration studies on the ZnO-MoS2 PCM showed a complete removal of MB dye (~99.95%). The UV-assisted dye degradation on the ZnO-MoS2 PCM offered a reduced membrane resistance, with the permeate flux gradually improving with the increase in the UV-irradiation time. The regeneration of the active ZnO-MoS2 layer also proved to be quite efficient with no compromise in the dye removal efficiency.

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