Abstract:

The growth activity, cadmium removal efficiency and cadmium adsorption characteristics of Bacillus subtilis in normal medium and cadmium-containing medium before and after acclimation were compared. The results showed that compared with normal strains, the cadmium removal ability of acclimated strain was enhanced. The functional groups involved in the cadmium adsorption process of normal strain were —OH, —NH₂, —COOH, —CONH, —PO₃^2-. Alkynes were produced during acclimation. The appearance of normal bacterial cells is clear, and the bacterial aggregation is relatively loose. The surface of the acclimated strains is shrunk, and the aggregation is dense and messy. The normal strain and the acclimated strain had different cell surface functioning substances in cadmium adsorption.

Key words: Bacillus subtilis, acclimation, adsorption characteristic, cadmium

摘要：

对比了驯化处理前后枯草芽孢杆菌在正常培养基及含镉培养基中的生长活性、镉去除效率及镉吸附特性差异。结果表明，相比正常菌株，驯化菌株镉去除能力增强。正常菌株参与镉吸附过程的官能团有—OH、—NH₂、—COOH、—CONH、—PO₃^2-；驯化过程中则产生了炔烃。正常菌体外形清晰，细菌聚集较为松散；驯化菌株表面皱缩，聚集紧密且杂乱。正常菌株和驯化菌株在吸附镉时起作用的细胞表面物质并不相同。

关键词: 枯草芽孢杆菌, 驯化, 吸附特性, 镉

CLC Number: 

• X703