Synergistic degradation of chitosan by impinging stream and jet cavitation.
Chitosan degradation was investigated using a combination of jet cavitation and impinging stream. Different operating parameters such as the initial concentration (1-5 g L(-1)), initial pH (3.2-4.8), solution temperature (30, 40, 50, 60, and 70°C), inlet pressure (0.1-0.45 MPa), and treatment time (0-120 min) were optimized to achieve the maximum degradation of chitosan. After the optimization of jet cavitation parameters, chitosan degradation was carried out using venturi tubes of different structures (the fluidic generator). The efficiency of the jet cavitation degradation was improved significantly by combining with impinging stream. The structures of the degradation products were characterized by Fourier-transform infrared spectroscopy and X-ray diffraction. This study has conclusively established that a combination of jet cavitation and impinging stream can be effectively used for the complete degradation of chitosan.
School of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China. Electronic address: huangyc@yeah.net.
Yongchun
Y
Huang
School of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China.
Pengfei
P
Wang
School of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China.
Yuan
Y
Yuan
School of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China.
Xian'e
X
Ren
School of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China.
Feng
F
Yang
D048271:Chitosan / Q000737:chemistry*; D057446:Hydrodynamics; D006863:Hydrogen-Ion Concentration; D011312:Pressure; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry*
D014867:Water; D048271:Chitosan
Chitosan; Degradation; Impinging stream; Jet cavitation; Synergistic effect