大豆油乙氧基化合物的生物降解

采用振荡培养实验和活性污泥模拟实验对大豆油乙氧基化合物（SOE）进行了生物降解研究。实验结果表明，振荡培养实验中SOE的初级生物降解度随平均环氧乙烷加成数的增多而略有下降，且SOE-4，SOE-10，SOE-20的初级生物降解度在第6天时分别为97．3％，91．1％，89．4％；活性污泥模拟实验中SOE的初级生物降解度随平均环氧乙烷加成数的增多而增加，且SOE-4，SOE-10，SOE-20的初级生物降解度在第8天时分别为29．0％，81．2％，100．0％。用激光粒度仪测量SOE水合物在不同静置时间时的粒径分布及分散度结果表明，随静置时间的延长，平均环氧乙烷加成数少的SOE水合物粒径逐渐增大，且分散性或水溶性变差，易产生团聚导致初级生物降解度降低。对水溶性或分散性较差的表面活性剂，建议以振荡培养实验研究其生物降解性较为恰当。

Biodegradability of Soybean oil Ethoxylates

The biodegradability of soybean oil ethoxylates(SOE)was studied by means of shake culture test and activated sludge simulation test.The results show that:For the shake culture test,the primary biodegradation degree of SOE is reduced slightly with the increase of average ethylene oxide adduct number,and that of SOE4,SOE-10,SOE-20 at the 6th day is 97.3%,91.1%,89.4%, respectively;For the activated sludge simulation test,the primary biodegradation degree of SOE is increased with the increase of average ethylen...