一株海洋假单胞菌产生物絮凝剂去除赤潮生物的实验研究  

Study on HAB removed with extracellular biopolymeric focculant

作　　者：龚良玉[1,2] 梁生康[1] 李雁宾[1,3] 王修林[1] 祝陈坚[1] 孙兴年[1] 

机构地区：[1]中国海洋大学海洋化学理论与工程技术教育部重点实验室,山东青岛266003 [2]青岛农业大学理学院,山东青岛266109 [3]中国海洋大学环境科学与工程学院,山东青岛266003

出　　处：《海洋环境科学》2009年第3期247-250,共4页Marine Environmental Science

基　　金：国家重点基础研究发展规划项目(2002CB714008);青岛农业大学人才基金(630524)

摘　　要：利用一株假单胞菌（Pseudomonas sp．）的发酵液研究了该细菌产絮凝剂对东海原甲藻和裸甲藻的絮凝去除作用。结果表明。该生物絮凝剂可有效絮凝去除实验所选用两种赤潮生物，并且随絮凝剂用量的增加以及作用时间的延长，去除效果逐渐增加至最大然后基本保持恒定。有效絮凝去除赤潮生物的体积浓度为4．0％-10．0％。有效絮凝作用时间为1．5h左右．絮凝效率与体系的pH值密切相关，pH在8．0左右絮凝效率较高。不同浓度的Ca^2＋、Mg^2＋对该絮凝剂絮凝除藻作用有一定的增效作用，Ca^2＋、Mg^2＋的最佳助凝离子浓度分别为2．0mmol／L及4．0mmol／L。The flocculation efficiency of biopolymeric flocculant （cell free culture broth） produced by Pseudomonas sp. on Prorocentrum dentatum stein 0201-01 and Gymnodinium sp. was investigated. The results revealed that the flocculant showed the excellent flocculation efficiency on the micro-algae and the efficiency inereased with its concentration and the connect time of flocculant with the micro-algae until reaching the maximum value. The optimum dose of flocculant was within the range of 4.0% - 10.0%, and their optimum connect time was about 1.5h. In addition, the flocculation efficiency depended strongly on solution pH and showed the excellent flocculation efficiency at pH 8.0. Moreover, the flocculation efficiency was also significantly enhanced by the addition of the cations such as Ca^2＋ and Mg^2＋ , and exhibited the best synergistic effect when the concentrations of Ca^2＋ , Mg^2＋ were at 2.0 mmol/L and 4.0 mmol/L, respectively.

关 键 词：赤潮藻 微生物絮凝剂 絮凝效率 

分 类 号：X55[环境科学与工程—环境工程]