Adsorption of Malachite Green on Fe-modified biochar: Influencing factors and process optimization
Yükleniyor...
Tarih
2017
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Desalination Publications
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Paper sludge and wheat husk biochar was converted to a Fe-composite through a simple co-precipitation process and its adsorption behavior was tested against an emerging pollutant, Malachite Green (MG). Response surface methodology was employed to determine the optimum experimental conditions and the interactions between pH, initial MG concentration, temperature and treatment time. The maximum adsorption percentage obtained experimentally was 97.1%, whereas the Box-Behnken design predicted a maximum adsorption of 98%, at pH 6.16, initial MG concentration of 6.56 ppm, temperature of 34.75 degrees C and treatment time of 22 min. Compared with the original biochar, the Fe-modified sample improved the adsorption of MG by similar to 34%. The adsorption mechanism followed the Langmuir model (q(max) = 172.3 mg/g, correlation coefficient 0.960) and the kinetics of the process were best described by the pseudo-second-order model (correlation coefficient 0.9818), although boundary layer effects were also observed.
Açıklama
Anahtar Kelimeler
Biochar, Malachite Green, Adsorption, Fe-modified Composite, Response Surface Methodology
Kaynak
Desalination and Water Treatment
WoS Q Değeri
N/A
Scopus Q Değeri
Q3
Cilt
74
