小球藻细胞表面特性研究

Research on surface characteristics of chlorella cells

通过微电泳法和吸附碳氢化合法,分别考察了溶液化学条件对小球藻细胞表面电性和疏水性的影响.研究结果表明:当pH小于7时,小球藻细胞表面电性随着pH的增加而增加,而其疏水性随pH的增加而减小;当pH为8时表现出最小疏水性;当pH大于7时,pH对小球藻细胞表面电性影响不大,但对表面疏水性的影响显著,当pH由8增加到11时,小球藻细胞表面疏水性迅速增加,小球藻细胞逐步发生凝聚.同时研究了阳离子凝聚剂对小球藻细胞表面疏水性的影响,结果表明:添加阳离子凝聚剂有利于提高小球藻细胞疏水性,少量添加时,小球藻细胞的疏水性增加很明显,随着添加量的增加,小球藻细胞表面疏水性增加趋势有所减缓.小球藻细胞表面电性和疏水性都受其表面组成物质和溶液化学条件的影响.

The effects of solution chemistry conditions on bicity of chlorella cells surface were investigated using a talc sorption carbon-hydrogen combination method, respectively. electrical potential and hydrophoro-electrophoretic method and ad The results show that when pH〈 7, the surface electrical potential of chlorella cells increases with the increasing of pH value while the hydrophobicity decreases. When pH = 8, the hydrophobicity of chlorella cells is the minimum. When pH〉7, the pH value has slight effect on surface electrical potential but sig- nificant effect on hydrophobicity. With the increasing of pH value from 8 to 11, the hydropho- bicity of the cells surface escalates rapidly. The effect of cationic flocculants on hydrophobicity of chlorella cells was also researched. The results indicate that the addition of cationic flocculants has a favorable effect on improving hydrophobicity of chlorella cells. The effect is obvious when the adding dose is small, but the increasing extent slowdown when the adding dose increase further. The electrical behavior and hydrophobicity of the chlorella cells surface are relatd with the surface composition and solution chemistry conditions.