| 摘要: |
| 自1995年5月9日-8月29日，每周一次采集了青岛城阳区上马镇对虾养殖池的水样并进行生物鉴定。结果表明，7月4日和7月11日该养殖场的北场3号小池水中浮游植物总量已达到赤潮密度，其优势藻种分别为三角揭指藻（Phaeodactylum triconutum）、裸甲藻（Gmmnodinium sp．）（7月4日）和三角褐指藻（Phaeodactylum triconutum）、新月菱形藻（Nitzchia closterium）、裸甲藻（Phaeodactylum triconutum）及裸藻（Englena sp）（7月11日）。使用改性粘土絮凝样品中的赤潮生物，应用正交试验设计，探讨去除赤潮生物的最佳条件。结果表明，在采用最佳条件进行去除处理时，三角褐指藻、新月菱形藻和裸甲藻的去除率均可达到80％-90%。 |
| 关键词: 改性粘土 赤潮生物 正交试验 去除率 |
| DOI： |
| 分类号: |
| 基金项目:山东省自然科学基金!93E0157号;山东省专项基金94（46）及国家青年基金49406072号 |
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| A STUDY ON OPTIMIUM CONDITIONS FOR THE REMOVAL OF RED TIDE ORGANISMS BY MODIFIED CLAYS |
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LI Quan-sheng,YU Zhi-ming,ZHANG Bo,ZHANG Yong-shan,MA Xi-nian
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Insititule of Oceanology, The Chinese Academy of deiences, Qingdao, 266071
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| Abstract: |
| The water samples from the prawn-culture pools of Shangma Town, Chengyang District of Qingdao were collected weekly from May 9 to August 29, 1995 and the biologic species were identified. The result shows that the total amounts of phytoplankton in the water samples collected from the No.3 small pool in the northern part of the culture field reached red tide concentration on July 4 and 7. The predominant species were Phaesodactylum triconutum, Gymnodinium sp. (July 4) and Phaesodactylum triconutum, Nitzchia closterium, Gymnodinium sp. and Euglena sp. (July 11), respectively. The red tide organisms were coagulated by the modified clay and the optimum conditions for removing red tide organisms were obtained by means of the orthogonal test. The results show that an optimum formula for removing Phaesodactylum triconutum is: modified kaolin 75-100 mg/L, PACS 2-5 mg/L and sodium percarbonate 5-30 mg/L. Optimum formulae are: removing was modified kaolin > 35 mg/L, PACS 2-5 mg/L and sodium percarbonate 7-10 mg/L for Gymnodinium sp., and modified kaolin 75-100 mg/L, PACS> 0.4 mg/L and sodium percarbonate 30 mg/L for Nitzchia closterium. In all of the above formulae, the best pH was 6.0 and removal rates reached 80%-90% within l2 hours. The best formulae were slightly different with different species. Thus the formula should be selected according to the predominant species in the field waters. |
| Key words: Modified clay, Red tide organism, Orthogonal, Removal rate |
