壳聚糖的絮凝性能研究进展_花蓉蓉.pdf

2008 27 3 CHEMICAL INDUSTRY AND ENGINEERING PROGRESS ·335 · 1 1 2 1 2 200092 210096 pH X 703.5 A 100066132008 Research advances in flocculation properties of chitosan 1 1 2 HUA Rongrong ZHOU Gongming CAO Dawei 1 National Engineering Research Center for Urban Pollution Control Tongji University Shanghai 200092China 2School of Engrgy and EnvironmentSoutheast UniversityNanjing 210096 Jiangsu China Abstract The nature of degradability and innocuity makes chitosan a kind of excellent cationic organic flocculant. The flocculant mechanisminfluence factors (such as molecular weightpH initial turbidity organics and ion concentration)flocculation efficiency and modification of chitosan are discussed. The modified chitosan which overcomes some of its defects could be widely applied in the future. Key words chitosan; flocculation; modification 1 10 50%100 20 h 2 10 h4 h 3 91.3%66 89.3%96 86.4%180 1 [1] 150% [1] [2] 50% Gamage 2 CH OH NH2 2 O HO 2.1 O O HO O NH CH OH 2