改性凹土包被苯酚降解菌的应用研究

Application of Modified Attapulgite Coated Phenol Degrading Bacteria

主要研究凹土的物理吸附法与菌种的生物降解法相结合条件下含酚废水的降解。首先对凹土进行提纯、酸改性及有机改性以获得能够使菌株更好吸附的凹土载体。然后,进行苯酚降解性能的测试。通过实验得出以下结论:经过酸改性与有机改性的凹土比表面积更大、内孔径更大、亲水性更强、表面电荷分布更多;降解性能最好的载体是有机改性凹土-菌种复合载体,其苯酚降解率达97%,酸改性凹土-菌种复合载体次之,其降解率达84%,而最差的是原凹土-菌种复合载体,降解率仅为61%。

The degradation of waste water with phenol under the conditions of the combination of attapulgite adsorption and species biodegradation was investigated in this article. In order to obtain the attapulgite vectors that species was able to be adsorpted better, attapulgite processing by purification, acid -modification and organic modification was conducted. Then, degradation performance tests of phenol were discussed. Through acid - modification and organic modification, the surface area and internal aperture of attapulgite became larger, and attapnlgite was more hydrophilic with more surface charge. The organically modified attapulgite -strain composite carrier performed best, whose phenol degradation reached 97%. The second was acid - modified attapulgite - strain composite carrier, whose degradation also reached 84%. And the last was attapulgite - strain composite carrier, whose degradation was only 61%.