Heterogeneous Fenton catalysts were developed from fly ash by alkali, acid and alkali-acid modification for NOx removal using H2O2.The experimental re…

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.

PDF | On Jan 12, 2012, Juliana De Carvalho Izidoro and others published Zeolite Synthesis from Brazilian Coal Fly Ash for Removal of Zn2+ and Cd2+ from Water | Find, read and cite all the research ...

This paper contains information on the utilization of silica from existing coal fly ash and an effective method for obtaining silica from the coal fly ash.

Fly ash is the solid by-product of waste incineration. It contains high content of soluble salts and heavy metals, which causes difficulty in treatment. In this study, …

In addition, we examine the application of CFA-based zeolites in removing or minimizing harmful gases. As we enter an era of utilizing disposed waste, developing efficient and low-cost materials for the removal of harmful gases may require improving the synthesis of high-purity, high-performance fly ash zeolite materials.

High-sulfur mixed fly ash residues from semi-dry flue gas desulfurization units in coal-fired power plants are unsuitable for use as supplementary cementitious material (SCM) for concrete production or carbon dioxide utilization. In this work, we explore the potential for upcycling a representative …

The surface physico-chemical characteristic of adsorbent fly ash was studied in an effort to establish a quantitative understanding of removal of the selected dye MG by adsorption. Results showed that the fly ash has a pH zpc value of 7.96.

Quasi-solid-state electrolytes in dye-sensitized solar cells (DSSCs) prevent solvent leakage or evaporation and stability issues that conventional electrolytes cannot; however, there are no known reports that use such an electrolyte based on fly ash SiO 2 (FA_SiO 2) from raw fly ash (RFA) for solar energy conversion applications.

In this study, fly ash was modified by ball milling through coupling alkaline and mechanical to achieve the reuse of fly ash. The adsorption capacity of fly ash for acidic gases was improved in experiments using simple ball milling.

The goal of this work was to provide an understanding of P (V) removal by fly ash (FA) from coal power plants. Phosphate removal using Ca (II) rich FA was evaluated in terms of i) sorption equilibrium, ii) sorption kinetics under the expected pH values and P (V) concentrations in wastewaters effluents, and iii) P (V) availability of the FAs in ...

The disposal of the hazardous municipal solid waste (MSW) incineration fly ash is a critical environmental issue in China and the high contents of salts in the fly ash make the ash disposal extremely difficult. The present study proposes a novel method for the salts removal from MSW incineration fly ash using molten carbonates and chlorides …

MSWI fly ash soluble salts have been optimally removed by washing with reduced water consumption. Washed ash can be stabilized for safer disposal to landfills for both non-reactive hazardous wastes and non-hazardous wastes. Stabilized fly ash can be submitted to material recovery in the field of road basement.

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 …

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 ...

Two types of fly ash from fluidized bed (FBC) and pulverized coal combustors (PCC) were treated with calcium hydroxide (Ca (OH) 2) to produce reactive SO 2 sorbents. Treatment was performed using 28.6 mass% Ca (OH) 2 /fly ash mixtures slurried at 350 K for 8 h. Sulfation experiments were carried out in a thermogravimetric analyzer (TGA) at SO 2 …

Semantic Scholar extracted view of "Preparation and evaluation of a mesoporous calcium-silicate material (MCSM) from coal fly ash for removal of Co(II) from wastewater" by G. Qi et al.

It is devoted to prepare porous geopolymer using fly ash as source material and activated by liquid alkaline activator when fly ash was partially replaced by iron ore tailing at level of 30%, by weight, with H 2 O 2 as ing agent and to determine the Cu 2+ removal efficiency, adsorption affecting factors, adsorption isotherms and adsorption ...

Silica was extracted from fly ash via inorganic alkali leaching method followed by inorganic acid precipitation process. Extracted silica was characterized by scanning electron …

Solid-state conversion of fly ash to an amorphous aluminosilicate adsorbent (geopolymer) has been investigated under different conditions and the synthesised material has been tested for Cu 2+ removal from aqueous solution.

The results indicate that the novel nano-substrate composite with fly ash modified can be used as an efficient and low cost adsorbent for simultaneous removal of dyes and heavy metals, the resulted water respects the discharge regulations.

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 …

For the first time biomass fly ash geopolymer monoliths were used as adsorbents for the removal of methylene blue from synthetic wastewaters. Highly porous and lightweight fly ash-based geopolymers were produced and then evaluated as methylene blue adsorbents.

Considering the negative charged surface of the fresh prepared SiO 2, two basic dyes with cationic dominant groups, methylene blue () and malachite green …

Biomass fly ash is an interesting adsorbent for dye removal from wastewater, due to its greater proportion of unburned carbon when compared to other fly ashes [19]. However, the adsorption capacity of the original biomass fly ash was relatively low for reactive dyes. In this study, the optimum conditions for the alkaline treatment of …

Fly ash is the fine ash produced at coal-fired power plants that develops cementitious properties when mixed with cement and water. Fly ash in concrete is widely used across the U.S. to the strength of concrete. Fly ash suppliers such as Cemex use it to improve workability of fresh concrete and reduce water demand, shrinkage and permeability of …

The CFA contains a considerable percentage of SiO 2 ranging from 35 to 70% depending on source of the coal. The ash obtained from JSL contains 63% of silicon dioxide and, hence, suitable to extract silicon dioxide from the coal fly ash. As CFA has 35–70% silicon dioxide and 10–35% aluminium oxide [ 1 ], research has been made to …

Semantic Scholar extracted view of "Preparation of amidoxime-functionalized mesoporous silica nanospheres (ami-MSN) from coal fly ash for the removal of U (VI)." by Bangda Wang et al.

Request PDF | Extraction of Silica (Sio2) from Coal Fly Ash by Leaching and Sintering Technology | Coal is the prime fuel in generation of power, and in India, 60% of power generation is from it ...

At Charah Solutions, we market Class C fly ash and Class F fly ash from our MultiSource® materials network locations across the country. Our dedicated ash marketing team has a national presence and works with many of the nation's largest utilities. With deep experience in cement, fly ash, concrete, civil engineering, and chemical engineering, …