文档介绍：Modelling Bio-enhanced TCE DNAPL Elimination in
a Soil Column
Xiaomin Mao, Haizhu Hu
Center for Agricultural Water Research in China, College of Water Conservancy and Civil Engineering
China Agricultural University
Beijing 100083, . China
e-mail address: ******@.cn, hu_hai_zhu@
Abstract—Trichloroethene (TCE), usually in the form of dense Recent research found that dechlorination could be
non-aqueous phase liquid (DNAPL), is a widely used degreasing sustained in high concentrated TCE source zones despite the
ingredient causing profound soil and groundwater contamination. potential toxicity of pounds[1,2,3]. Compared
While bio-enhanced dechlorination of TCE to harmless Ethene is with the typically employed technique of treating
a promising technique for waste water treatment, the mechanism downgradient, low concentration, aqueous phase plumes,
and related phenomenon have not been thoroughly understood, source zone dechlorination can enhance DNAPL dissolution
especially in groundwater. prehensive physical and and thus shorten the total remediation time[4,5], which brings a
biological based model is established here to describe the fate of promising treatment technology.
TCE DNAPL resided in a soil column augmented with
dechlorinators and flushed by groundwater rich in nutrients and Based on field and laboratory experiment, numerical