溶液化学特性对谷氨酸菌在聚砜膜上吸附行为的影响

研究了溶液化学特性（包括pH值，离子强度和给溶液浓度）对谷氨酸 在疏水性聚砜膜上吸附行为的影响。结果表明：谷氨酸菌在聚砜膜上的吸附符合静电作用机理；菌体在等电点时发生絮凝，是影响吸附量的重要原因；pH值愈高，谷氨酸菌的吸附量愈小；离子强度降低相同电荷物质之间的静电排斥，增加吸附，同时也降低相反物质电荷之间的静电吸附，从而降低吸附；谷氨酸菌浓度愈大，平衡吸附量也愈大。

EFFECT OF SOLUTION CHEMISTRY ON GLUTAMIC ACID BACTERIA ADSORPTION ONTO POLYSULFONE MEMBRANE

The effect of solution chemistry including pH,ionic strength and bacterial cell concentration on the adsorption of bacterial cells onto a hydrophobic polysulfone membrane were studied.As a result,the adsorption behavior was in good agreement with electrostatic interaction mechanism.At isoelectric point(IEP),bacterial cells occurred aggregation which played an important role in adsorption.With increasing pH,adsorption decreased.Increased salt concentration reduced electrostatic repulsion between like-charged material and adsorption increased.Increased ionic strength also reduced electrostatic attraction between oppositely charged material so adsorption decreased.The adsorption increased with cell concentration increasing.