Synthesis of Coal Fly Ash Zeolite with Copper Oxide Load for Acid Red GR Wastewater Treatment

The waste coal fly ash was utilized to synthesize zeolite by alkaline fusion method through orthogonal test. The copper oxide was loaded on the zeolite by dipping method. The optimal ratio of coal fly ash to sodium hydroxide, ratio of liquid to solid, calcining temperature and crystallization time were determined to be 1.2, 9, 700°C and 10 h, respectively. The CuO dipped zeolite was applied to treat the acid red GR wastewater and the obtained color and COD removal rates were 83.80% and 99.88%, respectively. The XRD pattern showed that the NaA type zeolite phase was formed in the experiment.

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Mordenite‐Type Zeolite from Waste Coal Fly Ash: Synthesis, Characterization and Its Application as a Sorbent in Metal Ions Removal

ChemistrySelect ◽

10.1002/slct.201903715 ◽

2020 ◽

Vol 5 (3) ◽

pp. 1193-1198

Author(s):

Henilkumar M. Lankapati ◽

Dharmesh R. Lathiya ◽

Lalita Choudhary ◽

Ajay K. Dalai ◽

Kalpana C. Maheria

Keyword(s):

Fly Ash ◽

Metal Ions ◽

Coal Fly Ash ◽

Type Zeolite ◽

Waste Coal ◽

Metal Ions Removal

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Parameters Affecting the Synthesis of X and A Zeolites from Coal Fly Ash

European Journal of Environment and Earth Sciences ◽

10.24018/ejgeo.2021.2.1.114 ◽

2021 ◽

Vol 2 (1) ◽

pp. 53-59

Author(s):

A. Korpa ◽

V. Teneqja ◽

S. Gjyli ◽

A. Andoni

Keyword(s):

Fly Ash ◽

Industrial Waste ◽

Acid Treatment ◽

Coal Fly Ash ◽

Exchange Capacity ◽

Raw Material ◽

Crystallization Time ◽

Zeolite Synthesis ◽

Different Types ◽

Type Zeolite

This paper summarizes the investigation results on the main parameters affecting the synthesis of type X and A zeolites using coal silicious fly ash (FA) as raw material. The synthesis was performed by dissolution of alkali-fused alumino-silicates, followed by hydrothermal treatment. The experimental data confirm that fly ash SiO2/Al2O3 ratio, NaOH/FA ratio, acid treatment of pre-fused fly ash, salinity of solution have a significant effect on type and properties of newly formed zeolites. In summary, the results show that A and X-type zeolite form with FA SiO2/Al2O3 ratio < 1.12 and > 1.86, respectively. Moreover, FA characterized by SiO2/Al2O3 mole ratio of 3.15 is suitable for X-type zeolite synthesis while A-type zeolite does not form without NaAlO2 addition. The crystallization occurs faster at higher temperatures although above 90°C X-type zeolite evolves into more stable phases whereas increasing the crystallization time from 1 to 72 hours, the yield of the synthetic products enhances from 60 to 75%. The use of seawater is responsible for the synthesis of X-type showing both lower purity and specific surface area. However, the synthetic products are characterized by high exchange capacity (> 320 meq/100 g), thus suggesting their successful application as adsorbents and catalysts in different types of wastewater and industrial waste treatments.

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Synthesis of Zeolite from Fly Ash and Removal of Heavy Metal Ions from Newly Synthesized Zeolite

E-Journal of Chemistry ◽

10.1155/2010/356150 ◽

2010 ◽

Vol 7 (4) ◽

pp. 1200-1205 ◽

Cited By ~ 3

Author(s):

Parag Solanki ◽

Vikal Gupta ◽

Ruchi Kulshrestha

Keyword(s):

Heavy Metal ◽

Fly Ash ◽

Metal Ions ◽

Heavy Metal Ions ◽

Coal Fly Ash ◽

Proximate Analysis ◽

13X Zeolite ◽

Alkali Fusion ◽

Type Zeolite ◽

The Cost

Coal fly ash was used to synthesize X-type zeolite by alkali fusion followed by hydrothermal treatment. Characteristics of the various Fly ash samples were carried out. Coal proximate analysis was done. Batch experiment was carried out for the adsorption of some heavy metal ions on to synthesized Zeolite. The cost of synthesized zeolite was estimated to be almost one-fifth of that of commercial 13X zeolite available in the market.

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Water Pollution Arising from Solid Waste (Coal, Fly Ash, Slag) Disposal, and Measures to Prevent Water Pollution

Water Science & Technology ◽

10.2166/wst.1983.0073 ◽

1983 ◽

Vol 15 (11) ◽

pp. 1-10 ◽

Cited By ~ 5

Author(s):

Dean M Golden

Keyword(s):

Water Pollution ◽

Fly Ash ◽

Air Quality ◽

Surface Waters ◽

Environmental Effects ◽

Large Volume ◽

Coal Fly Ash ◽

Disposal Site ◽

Potential Interactions ◽

Waste Coal

This paper reviews the pathways that large volume utility wastes can take which can cause environmental effects. Potential interactions of the environment with land-disposed utility wastes include: (1) effects on local air quality, (2) efforts on soils and vegetation, (3) phytotoxicity, (4) groundwater effeccts, (5) effects on surface waters, and (6) disposal site washout. Both natural and engineered mitigating mechanisms are reviewed.

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