Semprini L
Department of Civil Engineering, Oregon State University, Corvallis 97330, USA.
Environ Health Perspect. 1995 Jun;103 Suppl 5(Suppl 5):101-5. doi: 10.1289/ehp.95103s4101.
Chlorinated solvents and their natural transformation products are the most frequently observed groundwater contaminants in the United States. In situ bioremediation using anaerobic or aerobic co-metabolic processes is a promising means of cleaning up contaminated aquifers. Studies show that under natural conditions trichloroethylene can be anaerobically degraded to dichloroethylene, vinyl chloride, and ethylene. Pilot scale field studies of in situ aerobic co-metabolic transformations have shown that indigenous microbes grown on phenol are more effective at degrading trichloroethylene and cis-1,2-dichloroethylene than microbes grown on methane. Modeling studies support field observations and indicate that the removal of trichloroethylene and cis-dichloroethylene results from the biostimulation of an indigenous microbial population. Field tests and modeling studies indicate that, at high TCE concentration, degradation becomes stoichiometrically limited.
氯化溶剂及其天然转化产物是美国地下水中最常见的污染物。利用厌氧或好氧共代谢过程进行原位生物修复是清理受污染含水层的一种有前景的方法。研究表明，在自然条件下，三氯乙烯可厌氧降解为二氯乙烯、氯乙烯和乙烯。原位好氧共代谢转化的中试规模现场研究表明，以苯酚为生长底物的本地微生物在降解三氯乙烯和顺式-1,2-二氯乙烯方面比以甲烷为生长底物的微生物更有效。模型研究支持现场观测结果，并表明三氯乙烯和顺式二氯乙烯的去除是由于对本地微生物种群的生物刺激。现场试验和模型研究表明，在高浓度三氯乙烯的情况下，降解在化学计量上受到限制。
