蒙脱石对水相中沼泽红假单胞菌的吸附研究

Adsorption Research between Montmorillonite and Rhodopseudomonas palustris in Aqueous Phase

通过测定吸附条件对吸附率及吸附菌量的影响,研究了蒙脱石对水相中沼泽红假单胞菌(Rhodopseudomonas palustris)的吸附特性。结果表明,当蒙脱石重量为0.5g时,吸附菌量和吸附百分率均达到较恒定的状态,且受到菌液起始浓度和体积的影响。不同pH条件下,蒙脱石对菌的吸附率随着pH值的升高而逐渐降低,当pH=9时,有效吸附率为72.67%。蒙脱石对菌的吸附率与离子强度成反比。不同温度条件下,蒙脱石对菌的吸附率呈现出先升高、后降低的趋势,温度30℃时吸附率最高,为86.55%。表明蒙脱石对水相中菌的吸附不仅依赖于生物体的化学属性和表面属性,也受到环境温度等条件的影响。

The adsorption characters between montmorillonite and probiotic, Rhodopseudomonas palustris, were investigated through measuring the adsorption rates and strains amount in different conditions and observing the characters. The results showed that the amount of probiotic and adsorption rate attached to montmorillonite were invaria- bleness at montmorillonite weight of 0.5 g and affected with the initial concentration and volume of probiotic. The adsorption ability decreased with the increasing pH values and the real adsorption rate was only 72.67% in pH 9. Adsorption rate presented the same trend in different ionic concentrations. At different temperature, the adsorption rate of montmoriltonite to probiotics increased firstly and then decreased and the highest adsorption percent was up to 86.55% at 30 ~C. This research indicated that the strains adsorption depended on not only the biochemical and surface characters, but also the environmental condition such as temperature.