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一种提高粘土矿物去除赤潮生物能力的新方法
俞志明, 邹景忠, 马锡年
中国科学院海洋研究所 青岛 266071
摘要:
在研究粘土颗粒与赤潮生物絮凝作用的基础上，建立了粘土表面改性对其絮凝作用影响的理论模型，认为改变粘土颗粒的表面性质是提高其去除赤潮生物能力的主要途径，提出在粘土中引入PACS（聚羟基氯化铝）的改性方法。结果表明，对于微型原甲藻（Prorocentrum minimum）体系，粘土中引入微量PACS后，其去除率达90％以上的高岭土用量由原来的2 g/L降至0.1 g/L，去除效率提高近20倍。考察了PACS分子量对其促进粘土矿物去除赤潮生物作用的影响，发现不同制备条件的PACS其促进作用亦不相同，得到了最佳性能的PACS。
关键词:  粘土矿物  治理赤潮  新方法  聚羟基氯化铝
DOI：
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基金项目:国家博士后基金和山东省自然科学基金（93E0157）资助课题
A NEW METHOD TO IMPROVE THE CAPABILITY OF CLAYS FOR REMOVING RED TIDE ORGANISMS
Yu Zhiming, Zou Jingzhong, Ma Xinian
Institute of Oceanology, Academia Sinica, Qingdao 266071
Abstract:
A theoretical model based on study on the coagulation of red tide organisms with clays shows that the surface modification of clays affects the coagulation and is the main way to improve the capability for clays to remove red tide organisms. The improved method of adding PACS (polyhydroxy aluminum chloride) in clays is first proposed. The results show that the concentration of kaoline at which the removal ratio of Prorocentrum minimum is more than 90% decreases to 0.1 g/L from 2 g/L, and that removal efficiency increasing almost 20 times, due to addition of PACS. The effects of PACS molecular weight on the improvement are also examined. It was found that PACS prepared under different conditions are different in the improvement. PACS with the optimum performance was obtained.
Key words:  Clay minerals, Control red tide, New method, PACS
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