聚乙烯醇生化矿化度及自然降解的研究

Biochemical Mineralization of Poly vinyl Aleo- hol (PVA)and Its Natural Degradation.

通过对聚乙烯醇(PVA)生化矿化度、PVA在目然水域及土壤中的自净能力以及PVA降解过程中结构变化的研究,探讨PVA的可生化性及降解进程中物质的转化规律.PVA的生化矿化度高达50-70％,表明PVA在微生物作用下可以高度降解.由自净能力和结构变化过程的研究表明,PVA首先由大分子转变为小分子,经相应时间后向无机物转化,说明PVA在自然水域和土壤中有较好的自净作用。

The primary intent of this work is to explore biochemical degradability of PVA in natural water and soil, where it will be mineralised and the matter structure transformed. It is showed in the experiments that mineralization rate of PVA was as high as 50-70% through microbial conversion, in which macromolecules were decomposed to be low molecular inorganics. The results demonstrate that PVA will not accumulate in natural water or soil, and PVA wastewater can be treated by biochemical method.