Synthesis of zeolite from Italian coal fly ash: Differences in crystallization temperature using seawater instead of distilled water

Belviso, Claudia; Cavalcante, Francesco; Fiore, Saverio

doi:10.1016/j.wasman.2009.11.015

Cited by 99 publications

(53 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their main difference is simply the Si/Al ratio [44]. It is worth noting that Belviso et al synthesized zeolites from NaOH-activated fly ash using seawater within the temperature range of 35 to 60 °C [21]; in their study, zeolite X was observed when the samples were prepared with seawater at 35 °C, while it was not found in the samples prepared with a distilled water at the identical temperature. This result implies that zeolite …”

Section: Xrd For the Fsw Samplementioning

confidence: 99%

A Comparison Study for Chloride-Binding Capacity between Alkali-Activated Fly Ash and Slag in the Use of Seawater

Jun

Yoon

2017

Applied Sciences

View full text Add to dashboard Cite

Featured Application: The results of this study can be applied to the production of cementless concrete using seawater.Abstract: This study aimed to investigate the chloride-binding capacity of alkali-activated fly ash (denoted as FSW) and slag (denoted as SSW) samples and their synthesized Cl-bearing phases, which are capable of binding and immobilizing chloride when seawater is used as the mixing water. This study also examined the progressive changes in the pore structures of the FSW and SSW samples over time. The results show that the SSW sample is significantly more effective in the uptake of chloride ions compared to the FSW sample at 28 days of curing. While the FSW sample forms Cl-bearing zeolites (Cl-chabazite and Cl-sodalite) (possibly with similar types of geopolymeric gels), the SSW sample synthesizes Cl-bearing, layered double hydroxides (LDH) (Cl-hydrocalumite and Cl-hydrotalcite). Although both samples involve Cl-binding phases, the FSW sample is likely to be less efficient because it largely produces zeolites (or similar geopolymeric gels) with no Cl-binding capability (i.e., zeolites X and Y). Meanwhile, the SSW sample produces Cl-bearing LDH phases as well as C-S-H(I), which can physically adsorb chloride. The SSW sample exhibits both pore-size refinement and porosity reduction over time, while the FSW sample only exhibits pore-size refinement. Therefore, the SSW system is more advantageous in the use of seawater because it more effectively prevents Cl ingression due to greater impermeability.

show abstract

Section: Xrd For the Fsw Samplementioning

confidence: 99%

A Comparison Study for Chloride-Binding Capacity between Alkali-Activated Fly Ash and Slag in the Use of Seawater

Jun

Yoon

2017

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Due to the abundant presence of amorphous aluminosilicate glass fly ash has also been used in the synthesis of zeolites [12][13][14][15][16]. Zeolites are crystalline hydrated aluminosilicates characterised by a three-dimensional network of tetrahedral (Si,Al)O 4 units that form a system of interconnected pores, which makes these minerals very useful in many applications [17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Mobility of trace elements in fly ash and in zeolitised coal fly ash

Belviso

Cavalcante

Gennaro³

et al. 2015

Fuel

Self Cite

View full text Add to dashboard Cite

“…Since the initial studies that were reported by Holler and Wirsching, 1985, many different types of zeolites have been synthesized from fly ash by varying the synthesis conditions (Querol et al, 2002). Most of these studies utilized pure water during the synthesis process apart from a few studies that have concentrated on the use of seawater (Lee et al, 2001;Belviso et al, 2010). In our previous study (Musyoka et al, 2011), we showed that waste industrial brine could be used during the zeolitization process and a single phase hydroxysodalite zeolite was obtained from South African coal fly ash.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of zeolites from coal fly ash using mine waters

Musyoka

Petrik

Fatoba

et al. 2013

Minerals Engineering

View full text Add to dashboard Cite

Musyoka, N.M. et al. (2013). Synthesis of zeolites from coal ash using mine waters. Abstract:In this study mine waters obtained from coal mining operations in South Africa were used as a substitute for pure water during the synthesis of zeolites from South African coal fly ash. Procedures that had been optimized to produce single phase zeolite Na-P1 and X using pure water were employed independently. The use of circumneutral mine water resulted in similar quality zeolite Na-P1 and X whereas the use of acidic mine drainage led to the formation of a single phase hydroxysodalite zeolite. Since these two wastes (fly ash and mine waters) are found in close proximity to each other, this study demonstrates that they can be used to ameliorate each other and at the same time produce saleable zeolitic products that can be used to offset their costs of disposal and treatment.

show abstract

Synthesis of zeolite from Italian coal fly ash: Differences in crystallization temperature using seawater instead of distilled water

Cited by 99 publications

References 15 publications

A Comparison Study for Chloride-Binding Capacity between Alkali-Activated Fly Ash and Slag in the Use of Seawater

A Comparison Study for Chloride-Binding Capacity between Alkali-Activated Fly Ash and Slag in the Use of Seawater

Mobility of trace elements in fly ash and in zeolitised coal fly ash

Synthesis of zeolites from coal fly ash using mine waters

Contact Info

Product

Resources

About