Comparison of alkali modified fly ash and alkali activated fly ash as Zn(II) ions adsorbent from aqueous solution

Purbasari, Aprilina; Ariyanti, Dessy; Sumardiono, Siswo; Shofa, Muhammad; Manullang, Reinhard

doi:10.2298/sos2201049p

Cited by 11 publications

(7 citation statements)

References 28 publications

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“…SEM analysis to determine the surface morphology of fly ash and zeolite from fly ash had been carried out with magnification of 1000x as shown in figure 2. Fly ash had spherical shape consisting of various size with smooth surface as obtained by previous studies [12,[23][24][25]. The surface of fly ash became rough after undergoing hydrothermal process.…”

Section: Characterization Of Zeolite From Fly Ash By Hydrothermal Pro...supporting

confidence: 52%

Valorization of fly ash as zeolite by hydrothermal process for dyes adsorption

Purbasari,

Purwanto,

Alfizhari

et al. 2023

J. Phys.: Conf. Ser.

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Valorization of fly ash as zeolite is one of sustainable ways to reduce environmental burden. In this paper, zeolite was prepared from fly ash by hydrothermal process and applied as dyes adsorbent. In hydrothermal process, fly ash was reacted with 5 N NaOH solution using solid/liquid ratio of 1/30 for 15 hours at temperature of 85°C. Characterization of hydrothermal products consisted of X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area, and scanning electron microscope (SEM) analysis. The results indicated the formation of Na-X zeolite with higher surface area compared to raw fly ash. The obtained zeolite was applied as Eriochrome Black-T (EBT) dye adsorbent. Adsorption was conducted in batch process with variations in time and dye initial concentration. The adsorption efficiency would increase with increasing time, but after 90 minutes the adsorption efficiency would be relatively constant. The higher the dye initial concentration, the lower the adsorption efficiency. Furthermore, the study of adsorption kinetics model and adsorption isotherm model that had been carried out showed that adsorption process of EBT dye by zeolite from fly ash tended to follow pseudo-second order kinetics model and Freundlich isotherm model.

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Section: Characterization Of Zeolite From Fly Ash By Hydrothermal Pro...supporting

confidence: 52%

Valorization of fly ash as zeolite by hydrothermal process for dyes adsorption

Purbasari,

Purwanto,

Alfizhari

et al. 2023

J. Phys.: Conf. Ser.

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show abstract

“…On the basis of the R L value, adsorption process can be categorized as favorable adsorption (0<R L <1), irreversible adsorption (R L =0), linear adsorption (R L =1), and unfavorable adsorption (R L >1) (Amin et al, 2015;Purbasari et al, 2022). The comparison of obtained result in this research with the others is shown in Table 3.…”

Section: Isotherm Studies Of Mo Dye Adsorption By Fly Ash-based Geopo...mentioning

confidence: 79%

Adsorption of Methyl Orange Dye by Modified Fly Ash-Based Geopolymer – Characterization, Performance, Kinetics and Isotherm Studies

Purbasari¹,

Ariyanti²,

Fitriani³

2023

J. Ecol. Eng.

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Geopolymer has been widely used as adsorbent for heavy metals and dyes. Modification on geopolymer surface with cationic surfactant can improve the anion exchange capacity of geopolymer. In this paper, fly ash-based geopolymer had been modified with cetyltrimethylammonium bromide (CTAB) which is cationic surfactant and applied as adsorbent of methyl orange (MO) anionic dye. Modified geopolymer had shown better performance as MO dye adsorbent compared to unmodified geopolymer. The adsorption of MO dye showed the best result at low pH and reached equilibrium after 90 minutes. On the basis of kinetics and isotherm studies, MO dye adsorption by modified geopolymer followed pseudo-second-order model and Langmuir model with maximum adsorption capacity of 19.231 mg•g -1 .

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“…Figure 7-a demonstrates the effect of pH on the removal of reactive blue 19 dye effluent (250 mg/L) from an adsorption bath. Additionally, it was feasible to calculate the optimal pH value for geopolymer composite adsorption by treating dye effluent with fly ash/metakaolin-based geopolymers (FM and FM-TiO2) at a variety of pH ranges (2)(3)(4)(5)(6)(7)(8)(9)(10). According to the outcomes from Fig.…”

Section: Different Applications Of Fm and Fm-tio 2 Geopolymer Composi...mentioning

confidence: 99%

“…The ingredients of fly ash vary considerably based on the origin and composition of the coal employed during combustion. However, all fly ash contains substantial amounts of silicon dioxide (SiO2) (both amorphous and crystalline), aluminum oxide (Al2O3), iron oxide (Fe2O3), and calcium oxide (CaO) [7]. These characteristics, both physical and chemical, suggest that there may be potential for utilization and disposal.…”

Section: Introductionmentioning

confidence: 99%

Development of an Antimicrobial Inorganic Polymer Based on Fly Ash and Metakaolin Incorporated by Nano-TiO 2 for Reactive Dye Removal

Ahmed,

El-Apasery,

Ragai

2023

Preprint

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Advanced and eco-friendly construction materials are being developed to reduce pollution and improve wastewater treatment efficiency. One such material is a photocatalytic nanocomposite that uses industrial wastes and natural substances to eliminate pollution. A recent study explored using an inorganic polymer composite (FM) made from a mixture of 70% fly ash and 30% metakaolin, with sodium hydroxide and sodium silicate as an alkali activator. The study evaluated the mechanical and hydration characteristics of the FM composite after 28 days in 100% humidity at room temperature. The study also examined the effect of adding 2.5 wt.% of Nano-TiO2 to FM composite and how it affects its properties. Results indicate that adding Nano-TiO2 to FM composite enhances its mechanical, antibacterial, and photocatalytic capabilities. Specifically, FM-TiO2 composite showed 90% removal of reactive blue 19 dye effluent in sunlight after 90 minutes, making it an excellent choice for sustainable wastewater treatment. This study presents a cost-effective, eco-friendly solution to wastewater treatment, with added antimicrobial properties from Nano-TiO2.

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Comparison of alkali modified fly ash and alkali activated fly ash as Zn(II) ions adsorbent from aqueous solution

Cited by 11 publications

References 28 publications

Valorization of fly ash as zeolite by hydrothermal process for dyes adsorption

Valorization of fly ash as zeolite by hydrothermal process for dyes adsorption

Adsorption of Methyl Orange Dye by Modified Fly Ash-Based Geopolymer – Characterization, Performance, Kinetics and Isotherm Studies

Development of an Antimicrobial Inorganic Polymer Based on Fly Ash and Metakaolin Incorporated by Nano-TiO 2 for Reactive Dye Removal

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