摘要
采用 3因子 3水平的正交试验设计 ,考察了SiO2 浓度、Al3 + /SiO2 摩尔比及pH对PSAS(聚硅酸硫酸铝 )制备的影响 ,研究了PSAS对不同赤潮生物的絮凝作用 ,并与传统无机絮凝剂AS(硫酸铝 )的絮凝效果进行了比较 .结果表明 ,PSAS絮凝不同种类赤潮生物的最佳制备条件不同 .根据实验操作的可行性 ,得出PSAS的适宜制备条件为 :SiO2 浓度 2 % ,Al3 + /SiO2 摩尔比 1,pH4 .絮凝实验表明 ,PSAS的絮凝效果明显优于AS ,在达到相同去除率的情况下 ,PSAS的用量比AS低约 30 %～ 4 0 % ;PSAS对不同种类赤潮生物的絮凝效率也不同 ,与细胞的生理生态特性差异有关 .
In order to obtain optimum PSAS (Polysilicate-aluminium sulfate) preparation conditions for removing HAB organisms, the 3 factor and 3 level orthogonal test was devised. Concentration of SiO 2, Al 3+ /SiO 2 molar ratio and pH were chosen as the three chief factors in PSAS preparation. The experimental results showed that the optimum preparation condition for various HAB organisms was different, and according to practical experimental operation, the appropriate preparation condition was considered as: concentration of SiO 2=2%, molar ratio of Al 3+ /SiO 2=1,and pH=4.In addition, the coagulation efficiencies of PSAS on various HAB organisms were studied and compared with classical inorganic flocculant AS (Aluminium sulfate). The results indicated that the removal rates of PSAS were much higher than those of AS, and the dosages of PSAS were 30～40% lower than those of AS when they achieved the same removal rates. On the other hand, the anti coagulation ability of HAB organisms varied with algal species, which was related to different physiological and ecological features of various algal cells.
出处
《应用生态学报》
CAS
CSCD
2002年第11期1468-1470,共3页
Chinese Journal of Applied Ecology
基金
国家杰出青年基金 (4 0 0 2 5 614 )
国家重点基础研究项目(2 0 0 1CB40 9710)
中国科学院创新资助项目 (KZCX2 2 0 6) .
