Renewable-based treatment solution of Reactive Blue 21 dye on fly ash as low-cost and sustainable adsorbent

This study investigated the removal of Reactive Blue 21 (RB 21) dye from aqueous solutions by adsorption, evaluating the waste fly ash (FA). The effects of the parameters, such as initial dye concentration (100–750 mg/L), initial pH (2.0–8.0), adsorbent dose (1.0–4.0 g/L), and temperature (298–323 K) on the adsorption process were investigated. The optimum initial pH value was 2.0 for the highest RB21 dye removal (75.2 mg/g). At optimized conditions (pH 2.0, an adsorbent dosage of 1.0 g/L, a dye concentration of 750 mg/L, and an equilibrium time of 72 h), the highest adsorption capacity was found to be 105.2 mg/g. Moreover, the results of the kinetic studies fitted the pseudo-second-order kinetic model. Equilibrium data were best represented by the Langmuir isotherm model, with a maximum monolayer adsorption capacity of 103.41 mg/g at 323 K. ΔGads0 values were negative and varied from 11.64 to 9.50 kJ/mol in the temperature range of 298–323 K, the values of enthalpy (ΔHadso) and entropy (ΔSadso) of thermodynamics parameters were calculated as 37.62 kJ/mol and 86.67 J/mol K, respectively, indicating that this process was endothermic. Furthermore, the adsorbent costs for powdered activated carbon (PAC) and FA to remove 1 kg of RB 21 dye from aqueous solutions are calculated as 2.52 U.S. and 0.34 U.S. , respectively. It is seen that the cost of FA is approximately 7.4 times lower than PAC. The results showed that FA, a low-cost industrial waste, was promising for the adsorption of RB 21 from aqueous solutions.

Keyword: adsorption; fly ash; isotherm; kinetics; reactive blue 21

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adsorption initial adsorbent solutions aqueous process temperature kJ/mol results highest calculated isotherm respectively capacity kinetic values investigated removal parameters concentration varied (ΔHadso) Keyword kinetics reactive thermodynamics (ΔSadso) entropy enthalpy 298–323 approximately low-cost remove showed carbon
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Detaylı Görünüm
Yayın Adı
(dc.title)
Renewable-based treatment solution of Reactive Blue 21 dye on fly ash as low-cost and sustainable adsorbent
Yazar/lar
(dc.contributor.yazarlar)
Mehmet Kobya, Mustafa Dolaz, Aysegul Yagmur Goren
Yayın Türü
(dc.type)
Makale
Dil
(dc.language)
İngilizce
Yayımlanma Yılı
(dc.date.issued)
2024
Ulusal/Uluslararası
(dc.identifier.ulusaluluslararasi)
Uluslararası
Kaynak
(dc.relation.journal)
Journal of Chromatography A
Cilt/Sayı
(dc.identifier.volume)
1715
Sayfa
(dc.identifier.startpage)
Article Number: 464631
ISSN/ISBN
(dc.identifier.issn)
ISSN: 0021-9673; Online ISSN: 1873-3778
Yayıncı
(dc.publisher)
Elsevier
Veri Tabanları
(dc.contributor.veritaban)
Web of Science Core Collection
Veri Tabanları
(dc.contributor.veritaban)
Sciencedirect
Veri Tabanları
(dc.contributor.veritaban)
Scopus
İndex Türü
(dc.identifier.index)
SCI Expanded
İndex Türü
(dc.identifier.index)
Scopus
Etki Faktörü
(dc.identifier.etkifaktoru)
4,1 / 2022-WOS / Son 5 yıl: 3,7
Özet
(dc.description.abstract)
This study investigated the removal of Reactive Blue 21 (RB 21) dye from aqueous solutions by adsorption, evaluating the waste fly ash (FA). The effects of the parameters, such as initial dye concentration (100–750 mg/L), initial pH (2.0–8.0), adsorbent dose (1.0–4.0 g/L), and temperature (298–323 K) on the adsorption process were investigated. The optimum initial pH value was 2.0 for the highest RB21 dye removal (75.2 mg/g). At optimized conditions (pH 2.0, an adsorbent dosage of 1.0 g/L, a dye concentration of 750 mg/L, and an equilibrium time of 72 h), the highest adsorption capacity was found to be 105.2 mg/g. Moreover, the results of the kinetic studies fitted the pseudo-second-order kinetic model. Equilibrium data were best represented by the Langmuir isotherm model, with a maximum monolayer adsorption capacity of 103.41 mg/g at 323 K. ΔGads0 values were negative and varied from 11.64 to 9.50 kJ/mol in the temperature range of 298–323 K, the values of enthalpy (ΔHadso) and entropy (ΔSadso) of thermodynamics parameters were calculated as 37.62 kJ/mol and 86.67 J/mol K, respectively, indicating that this process was endothermic. Furthermore, the adsorbent costs for powdered activated carbon (PAC) and FA to remove 1 kg of RB 21 dye from aqueous solutions are calculated as 2.52 U.S. and 0.34 U.S. , respectively. It is seen that the cost of FA is approximately 7.4 times lower than PAC. The results showed that FA, a low-cost industrial waste, was promising for the adsorption of RB 21 from aqueous solutions.
Özet
(dc.description.abstract)
Keyword: adsorption; fly ash; isotherm; kinetics; reactive blue 21
URL
(dc.rights)
https://www.sciencedirect.com/science/article/abs/pii/S0021967324000049
DOI
(dc.identifier.doi)
10.1016/j.chroma.2024.464631
Fakültesi / Enstitütü
(dc.identifier.fakulte)
Mühendislik Fakültesi
Bölümü
(dc.identifier.bolum)
Çevre Mühendisliği Bölümü
Kurumdaki Yazar/lar
(dc.contributor.author)
Mehmet KOBYA
Kayıt No
(dc.identifier.kayitno)
BLBFC3AD80
Kayıt Giriş Tarihi
(dc.date.available)
2024-02-06
Not (Yayımlanma Yılı)
(dc.identifier.notyayinyili)
January 2024
Wos No
(dc.identifier.wos)
WOS:001154302700001
Konu Başlıkları
(dc.subject)
adsorption
Konu Başlıkları
(dc.subject)
fly ash
Konu Başlıkları
(dc.subject)
isotherm
Konu Başlıkları
(dc.subject)
kinetics
Konu Başlıkları
(dc.subject)
reactive blue 21
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