| 摘要: |
| 比较了不同种类黏土对中肋骨条藻的絮凝去除效率, 分析了黏土理化特征对絮凝去除效率的影响。结果表明, 不同种类黏土的Zeta 电位为?36.1～?15.9 mV, BET 比表面积为0.31～60.76 m2/g, 硅铝比为1.35～3.62。当黏土用量均为0.50 g/L 时, 不同黏土对中肋骨条藻的絮凝去除速度和去除效率有较大的不同, 黏土G 对中肋骨条藻的絮凝去除速度最慢, 去除率最低, 为13%; 黏土C 对中肋骨条藻的絮凝速度最快, 去除率最高, 为82%。在黏土用量为0.50 g/L 时, 利用线性关系与灰色关联度, 分析了中肋骨条藻去除率与黏土理化参数之间的关系, 研究结果表明: 中肋骨条藻的去除率与黏土的理化参数具有较强的线性相关, 去除率与黏土的Zeta 电位、比表面积正相关, 而与黏土的硅铝比负相关; 较高的Zeta 电位和BET 比表面积、较低的硅铝比有利于增加藻细胞的去除率; 灰色关联度分析表明, 黏土比表面积是主要影响因子, 相关系数为0.907, 黏土硅铝比对去除率影响较小, 相关系数为0.618。 |
| 关键词: 黏土 中肋骨条藻(Skeletonema costatum) 去除效率 影响因子 有害藻华 |
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| 基金项目:国家自然科学基金青年项目(40906055); 国家重点基础研究发展计划“973 项目”(2010CB428706); 国家自然科学基金创新研究群体项目(40821004); 中国科学院海洋研究所知识创新领域前沿项目(200805) |
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| Removal of Skeletonema costatum by different clays via coagulation |
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| Abstract: |
| The efficiencies of Skeletonema costatum removal were influenced by different clays. We studied the relationships between removal efficiencies (RE) and the features of different clays. Our results showed that, for different clays at 0.50g/L, the Zeta potentials of ranged from ?36.1 to ?15.9mV, the BET (Brunauer-Emmett-Teller) surface areas varied from 0.31 to 60.76 m2/g, the Si/Al ratios changes from 1.35 to 3.62, and the RE span from 13% to 82%. There were strong linear relationships between RE and Zeta potential, BET surface area, Si/Al ratio. High Zeta potential, BET surface area and low Si/Al ratio resulted in RE increasing. According to grey correlation analysis, BET surface area had the most significant effect on RE with a correlative degree of 0.907, while Si/Al ratio had the least effect on RE with a correlative degree of 0.618. |
| Key words: Clays Skeletonema costatum Removal efficiency Influence factors Harmful algal blooms |
