Synthesis of silica nanoparticles (SiNPs) from agro-wastes for removal of heavy metals from an aqueous medium – a mini review DOI Creative Commons

Senthilvel Barani,

Selvaraj Paul Sebastian,

Periyasamy Dhevagi

et al.

Green Chemistry Letters and Reviews, Journal Year: 2024, Volume and Issue: 17(1)

Published: Nov. 28, 2024

Heavy metals are micropollutants, persist in the environment and accumulate organisms, causing adverse effects to ecosystem. Synthetic inorganic minerals, polymers, activated carbon, ash, char, biomass powders, shells, etc. used as adsorbents remove heavy aqueous medium. Advancements nanotechnology green chemistry focus on novel materials for efficient removal of metals. Among different interesting nanomaterials, Silica nanoparticles (SiNPs) have recently emerged an important nanomaterial environmental remediation due their tractable pore size, distinct surface area, reactivity, outstanding biocompatibility, structural flexibility, stability, low toxicity, adoptable modification. Due huge availability biomass, SiNPs synthesis from crop residues agro-industries waste by-products has been widely suggested. The could be synthesized agro-waste through calcination, sol-gel, ball milling, Some produced certain recorded a specific area 5 653 m2 g-1 with particle size sub-50 nm. These wide range metals, viz., Cr, Ni, Pb, Cd, As, Hg, Zn, etc., solutions varied concentrations. This review briefly discusses various sources metal adsorption.

Language: Английский

Isolation of biosilica from biomass waste Setaria italica husks and its reinforcement effect on banana fiber-epoxy composite DOI
K. Sivakumar,

S. Kaliappan,

L. Natrayan

et al.

Biomass Conversion and Biorefinery, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 8, 2024

Language: Английский

Citations

14
Synthesis and Characterization of Modified Silica Gel from Teff Straw Ash Using Sol-gel Method DOI Creative Commons
Belete Tessema, Girma Gonfa, Sintayehu Mekuria Hailegiorgis

et al.

Next Materials, Journal Year: 2024, Volume and Issue: 3, P. 100146 - 100146

Published: March 28, 2024

Teff straw ash was first converted into sodium silicate solution, then processed via sol-gel, producing low-density silica aerogel (modified gel). A one-step modification method applied to produce modified gel from teff ash. The involved the use of trimethylchlorosilane (TMCS), ethanol, and n-hexane as reagents, with a specific molar ratio. Then, we used ambient pressure drying complete process. had improved properties compared unmodified one. These chemicals were modify surface substrate. in sol-gel altered TMCS solution. We studied how changed when different amounts n-hexane, it. Using BET, FTIR, XRD, SEM, porous structure identified. optimal ratio pore (ethanol/TMCS/n-hexane) for modifying found be 25/25/100. This resulted area 909.25 m2/g, size 0.5422 cm3/g, volume 2.670 nm. functional groups verified by FTIR analysis. XRD analysis amorphous crystalline nature gel, respectively. SEM images revealed morphology gel.

Language: Английский

Citations

11
Synthesis and evaluation of the anti-bacterial effect of modified silica gel supported silver nanoparticles on E. coli and S. aureus DOI Creative Commons
Belete Tessema, Girma Gonfa, Sintayehu Mekuria Hailegiorgis

et al.

Results in Chemistry, Journal Year: 2024, Volume and Issue: 7, P. 101471 - 101471

Published: Jan. 1, 2024

Scientists are looking for new antibacterial agents to disinfect point-of-use water sources due the dearth of clean drinking in developing nations and disaster areas. Because growth antibiotic disinfectant resistance as well emergence multiple unfavorable effects brought on by using current like chlorine compounds, this is case. their properties, silver nanoparticles (AgNPs) have become a useful replacement other nanomaterials. This study aimed evaluate activity AgNPs embedded modified silica gel (MSG). It was used kill Escherichia coli (E. coli) Staphylococcus aureus (S. aureus) test its efficacy purification batch zone inhibition system. Trimethyl chlorosilane (TMCS) modify MSG, which then ground into powder process known ambient dry method. Using reagent made from Vernonia amygdalina leaf extract, were prepared green technique. With aid FT-IR, BET, XRD, SEM/EDX, UV–vis spectrophotometers, MSG supported studied. E. S. tested abilities supplements with samples. excellent properties that enable system tests MSG. Batch showed both gram-positive gram-negative microorganisms decreased effectively after 10 min exposure. Zone indicated effective against kinds bacteria.

Language: Английский

Citations

11
Application of green agro-based nanoparticles in cement-based construction materials: A systematic review DOI
Safiki Ainomugisha,

Moses J. Matovu,

Musa Manga

et al.

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: 87, P. 108955 - 108955

Published: March 11, 2024

Language: Английский

Citations

9
Synthesis of modified silica gel supported silver nanoparticles for the application of drinking water disinfection: A review DOI Creative Commons
Belete Tessema, Girma Gonfa, Sintayehu Mekuria Hailegiorgis

et al.

Results in Engineering, Journal Year: 2024, Volume and Issue: 22, P. 102261 - 102261

Published: May 12, 2024

Water treatment technology is advancing to extend the supply of pure drinking water low-income societies. The application biomass-based silver nanoparticles for purification among outstanding innovations in this respect. Silver has less reactivity and excellent stability, which makes it preferable biological applications such as water. In research review, synthesis (AgNPs) using different techniques chemical synthesis, physical photochemical was discussed. AgNPs supported by biomass-driven silica gel its were found be promising technologies. use biobased aerogel disinfection recently been subject findings an effective method killing microorganisms from characteristics bio-silica are unequalled, large part because increased porosity, greater surface area, extraordinarily inadequate thermal conductivity density, potent antibacterial action against both Escherichia coli (E. coli) Staphylococcus aureas (S. aureus) at low concentrations. These features exhibited that bio-based aerogel-coated a interest also have anti-fouling properties prevent clogging membrane filters, enhances their potential improving quality safety.

Language: Английский

Citations

8
Characterization of teff straw from selected teff varieties from Ethiopia DOI Creative Commons
Belete Tessema, Girma Gonfa, Sintayehu Mekuria Hailegiorgis

et al.

Heliyon, Journal Year: 2023, Volume and Issue: 9(6), P. e17422 - e17422

Published: June 1, 2023

Utilization of biomass is important both for economic and environmental projection purposes. To use industrial applications as well to reduce its pollution load on environment, it characterize determine the compositions biomass. In this work, proximate chemical analyses straws four (Dagim, Filagot, Kora Kuncho) Teff (Eragrostis tef) varieties were investigated with three replications. The thermographic FTIR teff ashes also studied. volatile matter contents 78.80, 77.00, 80.20 80.60% Dagim, Kuncho, Filagot varieties, respectively. ash 6.34% Kuncho while value 6.00% Filagot. fixed carbon 14.86, 16.67, 13.47 13.40% silica straw Kora, are 5.92, 5.66, 4.94, 4.70%, This corresponds 92.21, 91.59, 77.19 87.20% in produced from results show that composition slight differences. Moreover, content comparable values reported rice husk wheat straw. Thus, can be used production silica.

Language: Английский

Citations

14
Synthesis and characterization of biosilica gel produced from teff (Eragrostis tef) straw using the sol-gel technique DOI
Belete Tessema, Girma Gonfa, Sintayehu Mekuria Hailegiorgis

et al.

Bioresource Technology Reports, Journal Year: 2023, Volume and Issue: 22, P. 101497 - 101497

Published: June 1, 2023

Language: Английский

Citations

11
Role of corn cob waste biosilica on mechanical, wear, thermal conductivity, and water absorption properties of essential oil, bamboo fiber-polyester food packaging composite material DOI

A. Eswaran,

Ritesh Giri, N. Venkateshwaran

et al.

Biomass Conversion and Biorefinery, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 15, 2024

Language: Английский

Citations

4
Response surface optimizing chromium (IV) removal with Teff straw-based activated carbon DOI Creative Commons

Sintayehu Shewatatek,

Girma Gonfa, Sintayehu Mekuria Hailegiorgis

et al.

Results in Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 102168 - 102168

Published: March 1, 2025

Language: Английский

Citations

0
Statistical optimization characterizations and Eco- friendly synthesis of silica from sugarcane bagasse DOI Creative Commons

Girma Assefa Habte,

Tafere Aga Bullo,

Yasin Ahmed

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: March 12, 2025

Abstract This research explores the synthesis and optimization of Silica have been effectively produced from sugarcane bagasse (SB) using sol-gel methods. Due to its rich silica content, can be utilized as a viable alternative source for synthesis. Employing Central Composite Design, study systematically varied combustion temperature (500–800 °C), time (2–4 h), digestion (1–3 h) enhance yield. The optimal conditions identified were 583.48 °C, 3.482 h, 2.283 resulting in yield 69.6%. Comprehensive characterization synthesized was conducted through Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Brunauer, Emmett, Teller model (BET) analysis Thermo-gravimetric Analysis (TGA). XRD results indicated amorphous nature silica, with broad peak at 22.36°, akin that commercial silica. FTIR revealed six characteristic peaks wavenumbers corresponding those found confirming presence similar chemical groups. SEM imagery illustrated disordered arrangement undefined morphology. TGA shows high thermal resistivity only 9% weigh loss 800 °C. Overall, this demonstrates high-quality minimal input energy consumption highlighting potential diverse applications.

Language: Английский

Citations

0