摘要
采用正交试验研究壳聚糖(CTS)吸附没食子酸(GA)的影响因素,分析得出壳聚糖对没食子酸的最佳吸附条件是:没食子酸溶液初始质量浓度为1 200 mg/L,20 mL没食子酸溶液中壳聚糖用量为0.02 g,震荡时间为60 min,温度为25℃。在此条件下制备出没食子酸与壳聚糖的吸附比为623 mg/g的抑藻剂,并研究其短期释放率。然后探讨该抑藻剂对水华微囊藻(Microcystis flos-aquae)和蛋白核小球藻(Chlorella pyrenoidosa)生长的影响。研究结果表明:这种新型抑藻剂对水华微囊藻存在显著的抑制作用:当抑藻剂质量浓度为30 mg/L时,抑制时间将达到15d;当抑藻剂质量浓度为60,90和130 mg/L时,抑制时间将长达24 d,抑藻率高达99%。但是在15 d内,抑藻剂并未对蛋白核小球藻表现出明显的抑制作用,当抑藻剂质量浓度为60 mg/L时,抑藻率仅为5%。因此,壳聚糖载没食子酸新型抑藻剂可以有效控制水华藻类水华微囊藻的生长而对蛋白核小球藻的影响较弱。
The factors of chitosan adsorbed gallic acid in orthogonal experiments were studied. The best adsorption condition was during shaking for 60 rain at 25℃ with initial concentration of gallic acid of 1 200 mg/L and 0.02 g chitosan in 20 mL gaUate acid. The adsorption ratio of chitosan to gallate algaccide of 623 mg/g was prepared under this condition and the short-term release rate of this algaecide as well as its effects on the growth of Microcystis flos-aquae and Chlorella pyrenoidosa were studied. The results show that the inhibitory effect on the growth of Microcystis flos-aquae can last up to 15 d when the algaecidc mass concentration is 30 mg/L; when the algaecide mass concentration is 60, 90 and 130 mg/L, the inhibition time is even longer than 24 d with 99% inhibition rate. However, this algaecide does not show significant effects on Chlorella pyrenoidosa within 15 d. When the algaecidc mass concentration is 60 mg/L, the inhibition is only 5%. Therefore, this algaecide can control the growth of Microcystis flos-aquae effectively, while it has weak influence on Chlorellapyrenoidosa.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第7期2538-2546,共9页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(20777021)
教育部科学技术研究重点项目(210253)
福建省自然科学基金资助项目(2010J01043
D0610012)
关键词
抑藻剂
缓释
没食子酸
水华微囊藻
蛋白核小球藻
algaeeide
sustained-release
gallic acid
Microcystisflos-aquae
Chlorellapyrenoidosa
