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
Название публикации (dc.title) | Renewable-based treatment solution of Reactive Blue 21 dye on fly ash as low-cost and sustainable adsorbent |
Автор/ы (dc.contributor.yazarlar) | Mehmet Kobya, Mustafa Dolaz, Aysegul Yagmur Goren |
Вид публикации (dc.type) | Makale |
Язык (dc.language) | İngilizce |
Год публикации (dc.date.issued) | 2024 |
Национальный/Международный (dc.identifier.ulusaluluslararasi) | Uluslararası |
Источник (dc.relation.journal) | Journal of Chromatography A |
Том/№ (dc.identifier.volume) | 1715 |
Страница (dc.identifier.startpage) | Article Number: 464631 |
ISSN/ISBN (dc.identifier.issn) | ISSN: 0021-9673; Online ISSN: 1873-3778 |
Издатель (dc.publisher) | Elsevier |
Базы данных (dc.contributor.veritaban) | Web of Science Core Collection |
Базы данных (dc.contributor.veritaban) | Sciencedirect |
Базы данных (dc.contributor.veritaban) | Scopus |
Вид индекса (dc.identifier.index) | SCI Expanded |
Вид индекса (dc.identifier.index) | Scopus |
Импакт-фактор (dc.identifier.etkifaktoru) | 3,8 / 2023-WOS / Son 5 yıl: 3,5 |
Резюме (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. |
Резюме (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 |
Факультет / Институт (dc.identifier.fakulte) | Mühendislik Fakültesi |
Кафедра (dc.identifier.bolum) | Çevre Mühendisliği Bölümü |
Автор(ы) в учреждении (dc.contributor.author) | Mehmet KOBYA |
№ регистрации (dc.identifier.kayitno) | BLBFC3AD80 |
Дата регистрации (dc.date.available) | 2024-02-06 |
Заметка (Год публикации) (dc.identifier.notyayinyili) | January 2024 |
Wos No (dc.identifier.wos) | WOS:001154302700001 |
Тематический рубрикатор (dc.subject) | adsorption |
Тематический рубрикатор (dc.subject) | fly ash |
Тематический рубрикатор (dc.subject) | isotherm |
Тематический рубрикатор (dc.subject) | kinetics |
Тематический рубрикатор (dc.subject) | reactive blue 21 |