一株海水藻类培养液的絮凝活性及机理分析  

Preliminary Analysis of Flocculating Activity and Mechanism of a Novel Marine Algae Culture Medium

作　　者：孙秀娟[1,2] 刘均洪[1] 焦绪栋[2] 秦松[2] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042 [2]中国科学院烟台海岸带研究所,山东烟台264003

出　　处：《安徽农业科学》2013年第1期281-283,共3页Journal of Anhui Agricultural Sciences

基　　金：海洋公益性行业科研专项项目(200905021-3)

摘　　要：[目的]研究一株海水藻类培养液的絮凝活性及机理。[方法]由实验室分离保存,一株海水来源的石莼(编号S307)培养液,分析不同因素下该培养液对高岭土悬液的絮凝效果,并探讨絮凝成分及机理。[结果]海藻S307的培养液具有良好的絮凝活性,并且具有较好的热稳定性。在实验室条件下,S307培养液投加量为8%(v/v)时,对高岭土悬液的絮凝活性可达72%;絮凝体系为碱性时,絮凝效果最好;其作用的最佳Ca2+浓度为3.6 mmol/L;结合紫外扫描和絮凝机制的研究结果,初步推测培养液中主要的絮凝物质应该为S307在生长过程中产生的核酸类物质,其中可能含有少量的胞外多糖,主要以离子键结合絮凝高岭土颗粒。[结论]该研究为水处理提供了一种新型絮凝剂。[ Objective] The study aimed to analyze flocculating activity and mechanism of a novel marine algae culture medium. [ Method] The flocculating activity of cuhure medium of $307, a type of marine algae Ulva lactuca L. , isolated fi＇nm Beihai Guantouling intertidal of Guangxi Province, was tested in this study, and the effects of medium concentration, pH, cationic salt concentration and temperature on the flocculating activity were analyzed. Finally, the flocculating ingredient and mechanism were discussed. [ Result ] $307 culture medium had good flocculating activity amt thermal stability. The flocculating rate against kaolin suspension could reach 72% when the concentration of $307 euhure medium was 8% （v/v） ; optinmm pH for the flocculating activity of the system was 12; the optimum efficiency would occur as Ca2＋ concentration was 3.6 mmnl/L. The results of UV spectrum scanning and flocculating mechanism research indicated that the main floccu- lating ingredient in the medinm was nucleic acid substance, and the medium might contain some extraeellnlar polysaceharide. Moreover, the flocculating ingredient bonded with kaolin particles through ionic bonds rather than hydrogen bonds. [ Conclusion ] The research provides a no- vel flocculant for wastewater treatment.

关 键 词：海水藻类 生物絮凝剂 絮凝活性 高岭土悬液 

分 类 号：S917.3[农业科学—水产科学] Q175[生物学—水生生物学]