摘要
研究了皂角苷（1种生物表面活性剂）和腐殖酸（1种类表面活性物质）对微生物降解蒽的影响,并与Tween-80（1种化学表面活性剂）对蒽的增溶及促进微生物降解的作用进行了对比.结果表明,在不加任何表面活性物质时,微生物需要7d产生足够的糖脂使蒽溶解,并发生微生物降解.皂角苷、腐殖酸和Tween-80均能较大程度的加速蒽的降解,而且在相同条件下皂角苷及腐殖酸的效果明显优于Tween-80.腐殖酸及皂角苷大大缩短了微生物降解蒽的时间,在2-4d内蒽的降解率可达到98%.同时,发现腐殖酸的浓度、蒽的初始浓度均影响着蒽的微生物降解速率.
The influences of saponin （a biosurfactant） and humic acid （HA, a surfactant - like substance） on the biodegradation of anthracene were studied in comparison with the effects of Tween-80 （ a chemical surfactant）. About 7 days were needed for microorganisms to produce sufficient glycolipids to solubilize anthracene and to make anthracene bioavailable in the absence of humic acid and other surfactants. Humic acid, saponin and Tween-80 significantly accelerated the biodegradation of anthracene, but humic acid and saponin were much more effictive than the chemical surfactant Tween-80 under the same conditions. Additionally, humic acid and saponin dramatically shortened the onset time for anthracene biodegradation, and the biodegradation rate exceeded 98% within 2 -4d. The biodegradation of anthracene dependent on the added concentrations of humie acid and the initial concentrations of anthracene.
出处
《环境科学学报》
CAS
CSCD
北大核心
2007年第11期1818-1822,共5页
Acta Scientiae Circumstantiae
基金
甘肃省自然科学基金资助项目(No.3ZS041-A25-027
3ZS051-A25-097)
甘肃省教育厅科研基金(No.0501-07)~~
关键词
蒽
微生物降解
皂角苷
腐殖酸
增溶作用
anthracene
biodegradation
saponin
humic acid
solubilization
