磁性灭藻剂对蛋白核小球藻和四尾栅藻的去除  

Removal of Chlorella pyrenoidosa and Scenedesmus quadricauda by magnetic algaecide

作　　者：魏燕芳[1] 郭沛涌[1] 李万全[1] 

机构地区：[1]华侨大学化工学院环境科学与工程系,厦门361021

出　　处：《环境化学》2014年第5期782-788,共7页Environmental Chemistry

基　　金：福建省自然科学基金(14141022;2012J01177)资助

摘　　要：将自制的磁性灭藻剂——载铜磁性壳聚糖微球(Copper magnetic chitosan microsphere,CMCM),分别用于蛋白核小球藻和四尾栅藻的对数期和迟缓期的灭藻效应.研究结果表明,磁性灭藻剂对处于迟缓期的蛋白核小球藻和四尾栅藻的抑藻效果较好,而且对四尾栅藻的去除效果更好.该时期灭藻剂的最佳用量为150 mg·L-1,灭藻率在2 d之后可达80%,4 d之后可达90%,灭藻过程中藻液的pH逐渐下降,残余铜离子浓度逐渐升高并趋于稳定.该灭藻剂主要是通过缓释铜离子和改变藻液的pH来对藻类生长进行抑制.灭藻剂药效期可持续10 d以上,回收再利用效果良好.In this paper, self-made magnetic algaecides （ CMCM ） were used for the removal of Chlorella pyrenoidosa and Scenedesmus quadricauda in logarithmic phase and lag phase. The results showed that the optimal application time of algaecide was in lag phase, and it had better removal effect for Scenedesmus quadricauda. In this phase, the optimal dosage was 150 mg·L-1 , and algae removal rate attained 80% after 2 days, 90% after 4 days. During algae removal process, pH gradually decreased, while the residual Cu2＋ concentration first increased gradually, and then stabilized. The release of Cu2＋ and change in water pH associated with CMCM application were the main algae removal mechanisms. Effective period of CMCM last 10 days, and it had a good ability of repeated utilization.

关 键 词：磁性灭藻剂 蛋白核小球藻 四尾栅藻 

分 类 号：X52[环境科学与工程—环境工程]