摘要
采用土埋、真菌生长和 CO2 释放试验分别测定了几种淀粉聚乙烯膜的生物降解性 .试验结果表明 ,膜的生物降解性与膜中的淀粉含量正相关 ,并受膜比面积大小的影响 .在受控条件下 ,含淀粉 6%～ 30 %的膜经 2 8d降解后 ,降解质量变化率在0 .6%～ 1 2 .4%范围内 ,其 CO2 释放量为 0 .0 2～ 0 .1 5mg/mg膜 .膜中的聚乙烯组分不仅本身难被生物降解 ,而且还抑制微生物对其淀粉组分的降解 .CO2 是淀粉聚乙烯膜好氧生物降解的终产物 ,可以作为评估膜生物降解性的一个可靠指标 .
The biodegradability of starch containing polyethylene films (6%～30% starch) was tested by soil burial,fungal growth and CO 2 evolution test respectively.The results showed that the biodegradability of the films was strongly correlated with starch content of the films and impacted by ratio surface area of the films.After biodegradation tests of the films were conducted for 28 days under controlled conditions,the mass changes caused by biodegradation ranged from 0 6% to 12 4%,and the CO 2 evolution measurements were 0 02～0 15 mg/mg films.The polyethylene component of the film not only was in itself hardly biodegradable but also had an inhibition effect on the biodegradation of the starch component.CO 2 is an end product for aerobic biodegradation of starch containing polyethylene films,and it may be taken as a reliable index for assessing the biodegradability of the films.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2000年第3期107-109,共3页
Environmental Science
关键词
淀粉聚乙烯膜
生物降解
塑料薄膜
废物处理
starch containing polyethylene film,biodegradability,mass change,CO 2 evolution.
