Amino-terminated SiO2–Al2O3 composite aerogels from fly ash …
In this study, by using a sol–gel grafting-atmospheric drying method, amino-terminated SiO2–Al2O3 composite aerogels, namely 3-aminopropyltriethoxysilane (APTES) or 3-(2-amino-ethoxy) propylmethyldimethoxysilane (AEAPMDS) modified SiO2–Al2O3 aerogels (AMSAAs), were synthesized from the fly ash and characterized by field …
Extraction of SiO2 from Alumina Extracted Coal Fly-Ash
Request PDF | On Jan 1, 2021, Rajaram Mohanty and others published Extraction of SiO2 from Alumina Extracted Coal Fly-Ash | Find, read and cite all the research you need on …
Synthesis and Characterization of Na-Zeolites from Textile Waste Ash
Massive production of carcinogenic fly ash waste poses severe threats to water bodies due to its disposal into drains and landfills. Fly ash can be a source of raw materials for the synthesis of adsorbents. Rag fly ash as a new class of raw materials could be a cheap source of Al and Si for the synthesis of Na-zeolites. In this work, NaOH …
CO2 sorption and regeneration properties of fly ash zeolites
Characterization of the materials by FTIR (Fig. 2) shows the differences between the starting fly ash and the materials synthesized, where the following zeolite characteristic bands can be ...
A Study on the Influence of Sodium Silicate Concentration and SiO2
Low-calcium Fly ash-based alkali-activated materials (AAM) have some extraordinary properties such as high fire resistance and low shrinkage. However, they have lower strength and high setting time when curing at ambient temperature conditions. Therefore, this research aimed to improve the strength and setting time of low-calcium …
Fly Ash
Fly ash ecosystem services. Vimal Chandra Pandey, in Phytomanagement of Fly Ash, 2020. 9.7 Valuation and policy approaches to promote fly ash ecosystem services. FA catena across the world is a source of environmental pollution to the residents of local livelihoods near the coal-based thermal power plants, despite the various agreements …
A novel approach to extract SiO2 from fly ash and its considerable
Silica extracting from fly ash (FA) becomes a key technology for its comprehensive utilization of waste. Here, high-purity SiO 2 was extracted from FA via organic acid/inorganic alkali/ultrasonication-assisted joint process and characterized by scanning electron microscopy, transmission electron microscopy, Brunauer-Emmet …
Experimental and numerical techniques to evaluate coal/biomass fly ash
The blends of CFA and BFA were prepared at three different ratios based on their weight and then mixed in a weight-to-weight ratio i.e., 75%Coal fly ash-25%Biomass fly ash (75CFA + 25BFA), 50%Coal fly ash-50%Biomass fly ash (50CFA + 50BFA), and 25%Coal fly ash-75%Biomass fly ash (25CFA + 75BFA) and then the three blends …
A novel and facile green synthesis of SiO2 nanoparticles for removal …
The development of a facile synthesis route for highly efficient nanomaterials is one of the key research areas in modern technology. The present study demonstrates a novel and facile green synthesis of SiO2 nanoparticles (NPs) using a simple extraction and precipitation method. This green synthesis method reduces the energy requirement as …
Hydrothermal synthesis of hydroxy sodalite from fly ash for the removal
The pH value of the solutions containing fly ash was measured using the following method: 0.5 g of fly ash was added to 50 ml of deionized water (pH = 7.0) and maintained at 25 °C for 4 h. The aqueous sample was taken and filtered by a Whatman syringe filter Puradisc 25 TF which was pre-wetted with propan-2-ol and rinsed with …
Sodium silicate insulating foam reinforced with acid-treated fly ash
A set of insulating foams based on sodium silicate were prepared using acid-treated fly ash as an additive. It was found that the HCl-treated fly ash was able to remove the undesirable transition/alkali metal impurities up to 74%. Furthermore, the effect of the fly ash amount and modulus (SiO 2 /Na 2 O mole ratio) on the thermal conductivity ...
A novel approach to extract SiO2 from fly ash and its considerable
In this paper, high purity (98.65%) and fine-grained SiO 2 with satisfactory total yield (51%) through organic acid/inorganic alkali/ultrasonication-assisted joint …
Using Modified Fly Ash for Removal of Heavy Metal …
This paper presents the characteristics of fly ash which was modified by 2-mercaptobenzothiazole (MBT) and sodium dodecyl sulfate (SDS) as the surfactants after treating with 1M NaOH solution. The …
Extraction of Silica (Sio2) from Coal Fly Ash by Leaching
The result shows that the maximum extraction efficiency of Silica (SiO 2) is around 80% at NaOH concentration of 40%, ratio of fly ash to NaOH is 1:1, leaching …
Extraction of silica from fly-ash and fabrication of silica-clay
Last Updated: 24 Jun 2023. Request PDF | Extraction of silica from fly-ash and fabrication of silica-clay composite for dye removal and kinetic studies | A facile and …
A novel approach to extract SiO2 from fly ash and its considerable
A novel approach to extract SiO2 as an adsorption material from FA was proposed by Gao et al. (2017). The SiO2 was extracted through combination of acetic …
Heavy metals removal/stabilization from municipal solid waste
Waste treatment using thermal technologies, such as incineration, leads to the production of pollutants and wastes, including fly ash (FA). Fly ash contains heavy metals (HMs) and other contaminants and can potentially pose high risks to the environment and negatively impact health and safety. Consequently, stabilizing fly ash prior to either use …
Extraction of Silica (Sio2) from Coal Fly Ash by
The result shows that the maximum extraction efficiency of Silica (SiO2) is around 80% at NaOH concentration of 40%, ratio of fly ash to NaOH is 1:1, leaching …
Possible applications of coal fly ash in wastewater treatment
The produced complex coagulants from fly ash of the Mong Duong power plant are proved to be effective for total suspended solids (TSS) removal from wastewater where the highest efficiency achieved ...
Preparation, properties and applications of fly ash-based porous
Fig. 2 shows the reaction mechanisms of using alkali-activated fly ash for the preparation of geopolymers (Fernández-Jiménez et al., 2005; Singh, 2018).The reactions that occur in the preparation of fly ash-based geopolymers are very complicated. As shown in Fig. 2 (a), the simplified primary reaction of fly ash-based geopolymer is the …
How to Deal With Fly Ash Removal and Safety
From a starting point, our certified experts keep up-to-date with the latest practices around working with fly ash and how to stay safe. That includes proper handling and PPE. It also includes knowing how to minimize agitation to fly ash to reduce the amount that becomes airborne at any time. Beyond equipment, there are some industrial hygiene ...
WO2008119212A1
A method of extracting silica and alumina from fly ash, comprises steps: leaching fly ash with a NaOH solution with a concentration more than 40% by mass, wherein silicon is leached in the form of sodium silicate from the fly ash, thereby obtaining the sodium silicate solution and the alkaline residue with a Al/Si ratio no less than 2; concentrating the …
Dye removal from aqueous solution using coal fly ash for …
Coal fly ash was characterized at first in batch adsorption with acid and basic dyes. Good results of removal were obtained, although strongly dependent on initial dye concentration, ash dosage, and above all on pH of the solution. The maximum adsorption capacities per g of fly ash were 410 mg of Acid Blue 25 and 142 mg of Basic Blue 9, both …
Kinetics of SiO2 leaching from Al2O3 extracted slag of fly ash with
Fly ash was mixed with NH 4 HSO 4 at a mole ratio of Al 2 O 3 to NH 4 HSO 4 of 1:8. The mixture was roasted at 400 °C for 60 min in air atmosphere. The roasted …
A Study for Silika Utilization and Its Separation …
The result shows that the maximum extraction efficiency of Silica (SiO2) is around 80% at NaOH concentration of 40%, ratio of fly ash to NaOH is 1:1, leaching temperature of 95 ℃, and leaching ...
Studi Pemanfaatan dan Metode Pemisahan Silika dari Coal …
coal fly ash dari berbagai jenis pembangkit listrik (Hanum et. al., 2018; Hanum et. al., 2020) dan diketahui silika merupakan salah satu komposisi utama penyusun pada coal fly ash.
Fly ash-based geopolymer: clean production, properties
Fly ash is the fine solid particulate residue driven out of the boiler with the flue gases in coal-fired power plants. Now it can be used for making geopolymer which acts as a cement-like product. The geopolymer technology provides an alternative good solution to the utilization of fly ash with little negative impact on environment. This review summarizes …
Extraction of SiO2 from Alumina Extracted Coal Fly-Ash
First Online: 19 March 2021 907 Accesses Part of the Lecture Notes in Mechanical Engineering book series (LNME) Abstract A huge quantity of fly ash is being generated …
Extraction of SIO2 from Coal Fly Ash by Using Sodium Meta …
Extraction of silica from non-blended fly ash has become a very essential process to reduce the waste form of fly ash. Nowadays, fly ash is being considered as a …
Municipal waste incineration fly ashes: from a multi
Background Fly ashes from municipal solid waste incineration contain significant amounts of (technology critical) elements. Processes to recover Cu or Zn are already in practice, but it still remains difficult to evaluate the full secondary resource potential of the ashes. One reason is the absence of a worldwide comparable analytical …