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Studies on the Anti-bacterial Activity of Chitosan Against Surface Water

CHENG Qing-li et al (Institute of Environment and Municipal Engineering,North China Institute of Water Conservancy and Hydroelectric Power,Zhengzhou,Henan 450011)  
Effect of anti-bacterial activity of CTS against surface water were studied and the acid solvent,molecular weight,pH value and concentration were also investigated.The result showed that acetic acid was the better acid solvent;the fittest pH value was between 5~6.The inhibiting rate was the highest when molecular weight was 4.4 kd and the antibacterial kinetic curves of CTS with other molecular weights had summit value.The number of bacteria was few after 10 hours.The antibacterial rate of CTS was enhanced with the rising of concentration.CTS can be used to inhibit bacterial in some surface water.
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