Characterization of decrystallized chitosan and its application in biosorption of textile dyes.
Decrystallized chitosan was produced from shrimp shells with a low degree of crystallinity (10%) and a high anionic dye binding capacity. Raw, mixed dye wastewater from a textile factory was efficiently decolorized using decrystallized chitosan that was more efficient than using normal chitosan and activated carbon. Decolorization reached 90% within 10 min and could be carried out from pH 4.5 to 8.1. Decrystallized chitosan can be regenerated by 2 M H2SO4 and was reusable more than 10 times. It is, therefore, an attractive candidate for the removal of dyes from textile wastewater.
Trung
Trang Si
TS
Bioprocess Technology, Asian Institute of Technology, P.O. Box 4, Klong Luang, Pathumthani 12120, Thailand.
Ng
Chuen-How
CH
Stevens
Willem F
WF
D000042:Absorption; D002686:Chitin / Q000031:analogs & derivatives* / Q000737:chemistry*; D048271:Chitosan; D004396:Coloring Agents / Q000737:chemistry* / Q000302:isolation & purification; D003460:Crystallization; D006863:Hydrogen-Ion Concentration; D007218:Industrial Microbiology; D007220:Industrial Waste; D013783:Textile Industry; D013784:Textiles
D004396:Coloring Agents; D007220:Industrial Waste; D002686:Chitin; D048271:Chitosan