Synthesis and characterization of magnetic ZnCl2-activated carbon produced from coconut shell for the adsorption of methylene blue
Yükleniyor...
Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier B.V.
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this research, a magnetic-activated carbon composite was synthesized to investigate its adsorption to methylene blue dye. Active carbon (ACz) was produced by ZnCl2 activation of coconut shell (char: ZnCl2, 2:1). Magnetic activated carbon (MACz) was prepared via an easy method by chemical co-precipitation of Fe3+/Fe2+. The pore diameter, pore-volume, and surface area of MACz were determined from N2 adsorption isotherms. The ACz and MACz were characterized by several techniques such as BET, SEM/EDX, FT-IR, XRF, VSM, TGA, and pHpzc analysis. The average particle size, particle size distribution, and zeta potential of MACz were determined by Zetasizer. The zero point charge of the MACz was determined as approximately 4.9 pH. Moreover, the adsorption by MACz was investigated as kinetically and thermodynamically for removal of methylene blue (MB) from aqueous solution. The kinetics and thermodynamic parameters were also calculated. According to the results, the adsorption process was determined as endothermic. The Langmuir and Freundlich isotherms models were used and it was found that adsorption of MB onto MACz best fitted to Freundlich model according to RMSE, SSE, and R2 values. The maximum adsorption capacity of the composite was calculated as 156.25 mg/g. Thermodynamic parameters (ΔHo, ΔGo, and ΔSo) were also calculated, which revealed that the adsorption process is spontaneous.
Açıklama
Anahtar Kelimeler
Adsorption, Coconut shell, Methylene blue, RMSE, SSE
Kaynak
Journal of Molecular Structure
WoS Q Değeri
Q3
Scopus Q Değeri
Q1
Cilt
1232
Sayı
Künye
Karaer Yağmur, H. & İsmet, Kaya (2021). Synthesis and characterization of magnetic ZnCl2-activated carbon produced from coconut shell for the adsorption of methylene blue. Journal of Molecular Structure, 1232, 130071. https://doi.org/10.1016/j.molstruc.2021.130071
