【摘要】 利用从污水、污泥中分离得到的聚乙烯醇(PVA)降解菌,采用吸光光度分析法,考察了甲醛和戊二醛改性对PVA生物降解性的影响。结果表明,PVA缩醛化产物的降解性均明显低于未改性PVA的降解性,并随着缩醛度或交联度的增加而下降。降解前后的FT-IR分析表明,在降解过程中缩醛产物的主链发生了断裂。更多还原

【Abstract】 Enzymes for biodegrading PVA was obtained from the waste water and sludge through separating technology.Spectrophotometric analysis was employed to investigate the effect of modification of PVA by formaldehyde and glutaraldehyde on the biodegradability of PVA.The results revealed that the biodegradability of PVA acetals is inferior to that of the unmodified PVA,and declines as the acetalizing or cross-linking degree increases.FT-IR analysis of the samples before and after biodegradation indicated that fission occurs in the backbone of PVA acetals during the degrading process.更多还原