摘要
选用温度、湿度、表面活性剂ＴＷ８０和ＣＮＰ比４个因素为调控因子，采用正交法进行周期为１５０天的实验研究．结果表明，３０天后，土壤中ＰＡＨｓ的降解率可达４４．５～７４．６％，６０天后，达７０．４～９３．７％，降解率的不同与调控条件显著相关．在此期间，降解最佳条件为４０℃，湿度２５％，ＣＮＰ比为１２０１０１，ＴＷ８０分别为２００～５００ｍｇ·ｋｇ－１．实验结束时，土壤中ＰＡＨｓ的降解率达９１．２～９９．８％．降解的最佳条件是４０℃，湿度１５％．经Ｒ值判别表明，不同时期各因子对ＰＡＨｓ降解影响有所不同．温度对ＰＡＨｓ降解影响较大，表面活性剂对土壤中ＰＡＨｓ的生物降解有调控作用．
Using temperature, moisture, surfactant TW 80 and CNP ratio as regulation factors, the biodegradation of ploycyclic aromatic hydrocarbons (PAHs) was carried out with an experimental period of 150 days. The results indicate that the degradation rate of PAHs reached 44.5～74.6% and 70.4～93.7% after 30 and 60 days, respectively. The optimum conditions for degradation during these periods were: temperature 40℃, moisture 25%, CNP ratio 120101, and TW 80 concentration 200～500mg·kg -1 . At the end of this experiment, the degradation rate of PAHs was up to 91.2～99.8%, with an optimum condition of temperature 40℃ ,and moisture 15%. The discrimination of R value indicates that the influence of the four regulation factors on the degradation rate of PAHs varied with time. Temperature had a significant influence on the degradation of PAHs, and surfactants had a regulating role on the biodegradation of PAHs in soil.
出处
《应用生态学报》
CAS
CSCD
1998年第6期640-644,共5页
Chinese Journal of Applied Ecology
基金
国家自然科学基金
关键词
土壤污染
多环芳烃
生物降解
表面活性
调控
Soil pollution, Polycyclic aromatic hydrocarbons, Biodegradation, Surfactant.
