scholarly journals Modified coal fly ash as low cost adsorbent for removal reactive dyes from batik industry

2018 ◽  
Vol 154 ◽  
pp. 01037 ◽  
Author(s):  
Agus Taufiq ◽  
Pratikno Hidayat ◽  
Arif Hidayat
Keyword(s):  
Fly Ash ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Reactive Dyes ◽  
Bet Surface Area ◽  
Batch Adsorption ◽  
Operational Parameters ◽  
Solution Ph ◽  
Percentage Removal ◽  
Modified Fly Ash

The removal of reactive dyes on modified coal fly ash has been investigated during a series of batch adsorption experiments. Physical characteristics of modified coal fly ash was characterized by Brunauer Emmett Teller (BET) surface area analysis, X-ray powder diffraction (XRD), Fourier transform infrared spectrophotometer (FT-IR), and scanning electron microscope (SEM). The effects of operational parameters such as initial dye concentration (50–200 mg/L), solution pH (4–10) and adsorbent dosage (50–200 mg/L) were studied. The adsorption experiments indicated that modified coal fly ash was effective in removing of Remazol Blue. The percentage removal of dyes increased while the modified fly ash dosage increased. The percentage removal of dyes increased with decreased initial concentration of the dye and also increased with amount of adsorbent used. The optimum of removal of dyes was found to be 94% at initial dye concentration 50 g/mL, modified fly ash dosage 250 g/mL, and pH of 2.0.

Modification of coal fly ash and its use as low-cost adsorbent for the removal of directive, acid and reactive dyes

2021 ◽  
pp. 126778
Author(s):  
Zawar Hussain ◽  
Na Chang ◽  
Jingqiu Sun ◽  
Simeng Xiang ◽  
Tehreem Ayaz ◽  
...  
Keyword(s):  
Fly Ash ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Reactive Dyes

scholarly journals Fly Ash Coated with Magnetic Materials: Improved Adsorbent for Cu (II) Removal from Wastewater

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 63
Author(s):  
Maria Harja ◽  
Gabriela Buema ◽  
Nicoleta Lupu ◽  
Horia Chiriac ◽  
Dumitru Daniel Herea ◽  
...  
Keyword(s):  
Fly Ash ◽  
Adsorption Capacity ◽  
Copper Ions ◽  
Synthetic Wastewater ◽  
Bet Surface Area ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Copper Adsorption ◽  
X Ray

Fly ash/magnetite material was used for the adsorption of copper ions from synthetic wastewater. The obtained material was characterized by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET) surface area, and vibrating sample magnetometer (VSM). Batch adsorption experiments were employed in order to investigate the effects of adsorbent dose, initial Cu (II) concentration and contact time over adsorption efficiency. The experimental isotherms were modeled using Langmuir (four types of its linearization), Freundlich, Temkin, and Harkins–Jura isotherm models. The fits of the results are estimated according to the Langmuir isotherm, with a maximum adsorption capacity of 17.39 mg/g. The pseudo-second-order model was able to describe kinetic results. The data obtained throughout the study prove that this novel material represents a potential low-cost adsorbent for copper adsorption with improved adsorption capacity and magnetic separation capability compared with raw fly ash.

A Noble and Economical Method for the Synthesis of Low Cost Zeolites From Coal Fly Ash Waste

2021 ◽  
pp. 1-19
Author(s):  
Virendra Kumar Yadav ◽  
R Suriyaprabha ◽  
Gajendra Kumar Inwati ◽  
Nitin Gupta ◽  
Bijendra Singh ◽  
...  
Keyword(s):  
Fly Ash ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Economical Method

Adsorption and stabilization of nickel ions on fly ash/lime mixing

2000 ◽  
Vol 42 (5-6) ◽  
pp. 79-85 ◽  
Author(s):  
P. Ricou-Hoeffer ◽  
V. Héquet ◽  
I. Lécuyer ◽  
P. Le Cloirec
Keyword(s):  
Fly Ash ◽  
Coal Fly Ash ◽  
Influential Factors ◽  
Metallic Ions ◽  
Mass Ratio ◽  
Solution Ph ◽  
Nickel Ions ◽  
Experimental Design Methodology ◽  
By Products ◽  
Lime Addition

Experimental design methodology was used to define conditions for the adsorption and the stabilization of nickel ions (initial concentration of 500 mg.L-1) on coal fly ash/lime sorbent. This type of sorbent allows the reuse of by-products and increases the stabilization of metallic ions by lime addition. It was shown that the solution pH, the metal/adsorbent mass ratio, the type of fly ash used as sorbent, and the fly ash/lime mass ratio are the most influential factors. A set of parameters was finally obtained (pH 5, metal/adsorbent ratio of 0.01 g.g-1, fly ash/lime ratio of 4 g.g-1, fly ash with the lowest content of iron oxide) for which the removal of Ni2+ is 96% and the leaching 0.03% by permuted water and 0.2% by acid solution of pH 2.

scholarly journals Synthesis of CHA Zeolite using Low Cost Coal Fly Ash

2015 ◽  
Vol 121 ◽  
pp. 961-966 ◽  
Author(s):  
Xiaotong Jin ◽  
Na Ji ◽  
Chunfeng Song ◽  
Degang Ma ◽  
Guoping Yan ◽  
...  
Keyword(s):  
Fly Ash ◽  
Low Cost ◽  
Coal Fly Ash

A low-cost adsorbent from coal fly ash for mercury removal from industrial wastewater

2017 ◽  
Vol 5 (1) ◽  
pp. 391-399 ◽  
Author(s):  
Mahshid Attari ◽  
Syed Salman Bukhari ◽  
Hossein Kazemian ◽  
Sohrab Rohani
Keyword(s):  
Fly Ash ◽  
Industrial Wastewater ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Mercury Removal

scholarly journals Studies on the CO2 Capture by Coal Fly Ash Zeolites: Process Design and Simulation

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8279
Author(s):  
Silviya Boycheva ◽  
Ivan Marinov ◽  
Denitza Zgureva-Filipova
Keyword(s):  
Fly Ash ◽  
Co2 Capture ◽  
Carbon Capture ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Cost Effective ◽  
Thermal Recovery ◽  
Raw Material ◽  
Dynamic Adsorption ◽  
Co2 Capture Capacity

At present, mitigating carbon emissions from energy production and industrial processes is more relevant than ever to limit climate change. The widespread implementation of carbon capture technologies requires the development of cost-effective and selective adsorbents with high CO2 capture capacity and low thermal recovery. Coal fly ash has been extensively studied as a raw material for the synthesis of low-cost zeolite-like adsorbents for CO2 capture. Laboratory tests for CO2 adsorption onto coal fly ash zeolites (CFAZ) reveal promising results, but detailed computational studies are required to clarify the applicability of these materials as CO2 adsorbents on a pilot and industrial scale. The present study provides results for the validation of a simulation model for the design of adsorption columns for CO2 capture on CFAZ based on the experimental equilibrium and dynamic adsorption on a laboratory scale. The simulations were performed using ProSim DAC dynamic adsorption software to study mass transfer and energy balance in the thermal swing adsorption mode and in the most widely operated adsorption unit configuration.

scholarly journals Effect of Na2O/SiO2 mole ratio on the crystal type of zeolite synthesized from coal fly ash

2003 ◽  
Vol 68 (6) ◽  
pp. 471-478 ◽  
Author(s):  
Dusica Vucinic ◽  
Igor Miljanovic ◽  
Aleksandra Rosic ◽  
Predrag Lazic
Keyword(s):  
Fly Ash ◽  
Hydrothermal Treatment ◽  
Coal Fly Ash ◽  
Zeolite Synthesis ◽  
Crystal Type ◽  
Modified Fly Ash ◽  
Zeolitic Materials

Coal fly ash was modified to zeolitic materials by hydrothermal treatment at 90 ?C. The zeolite synthesis was studied as a function of the mole ratio of Na2O/SiO2 in the reaction mixtures. The results showed that NaP1 zeolite is obtained when the Na2O/SiO2 mole ratio was 0.7. Hydroxysodalite is the dominant zeolite phase in modified fly ash treated with a higher Na2O concentration solution (Na2O/SiO2 = 1.3). The IR and XRD methods were used to determine the phases present in the starting sample and in the zeolitic materials.

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