TCE, trichloroethylene

Abbreviations TCE, trichloroethylene DCE, dichloroethylene PCE, perchloroethylene TCA, trichloroethane cDCE, cis-dichloroethylene DNAPL, dense, non-aqueous-phase liquid. 

Abbreviations PBDE = polybrominated diphenyl ether TCE = trichloroethylene PFOA = perfluorooctanoic acid TCP = trichloro-2-pyridinol. 

Chemical abbreviations PCE (perchloroethylene) TCE (trichloroethylene) DCE (dichloroethylene) VC (vinyl chloride). 

TCE, trichloroethylene MEK, methyl ethyl ketone DMF, dimethyl formamide DMAC, dimethyl acetamide. 

TBM Tribromomethane TCA Trichloroethane TCE Trichloroethylene TeCA Tetrachloroethane VC Vinyl chloride... 

Note MeCl = methylene chloride, PCBs = polychlorinated biphenyls, Perc = perchloroethylene (tetrachloroethylene), 1,1,1-TCA = 1,1,1-trichloroethane, TCE = trichloroethylene, Trans-1,2-DCE = trans-l,2-dichloroethylene, 1,1-DCA = 1,1-dichloroethane. 

Prior to installation of a 9 ft (2.7 m) diameter packed column for removal of TCE (trichloroethylene), DIPE (diisopropyi ether), and MTBE (methyl tertiary butyl ether) from a municipal well water supply, a pilot study was performed using a 12 in. (30.5 cm) packed column. Packing material, hquid and air flow rates, and removal efficiencies were evaluated for the compounds present. In the pilot study, TCE, which has a higher Henry s constant than DIPE, was found to be more readily removed. Based on these findings, a full-scale design resulting in 99.9% removal of DIPE was implemented. 

PAHs, polycyclic aromatic hydrocarbons DMBA, dimethylbenzanthracene BaP, benzo[ ]pyrene DEN, diethylnitrosamine MAMAc, methylazoxymethanol acetate MNNG, JV-methyl-JV -nitro-JV-nitrosogua-nidine TCE, trichloroethylene. 

HFC-134a has been found to be especially useful as a substitute for CFC-12 in automobile air conditioners. A fairly direct preparation method is shown in eqs (7) and (8) TCE = trichloroethylene. The reactions shown are typically done separately in several reaction zones. HCFC-133a can be prepared using catalysts such as Cr/Mg [34], Cr203/A1F3 [35], AlCUF [36], Zn/fluorinated alumina [37], and Zn/Cr [38, 39]. 

Fig. 3.4. The reaction steps of bacterial dehalogenation (prepared on the basis of Maymo-Gatell et al., 1979 Uchi-yama, 1999). PCE, perchloroethylene TCE, trichloroethylene DCE, dichloro-ethylene VC, vinyl chloride...

BTEX = benzene, toluene, ethylbenzene, xylene MTBE = methyl tert-butyl ether TCE = trichloroethylene TCA = trichloroethane PCBs = polychlorinated biphenyls. 

The advantages of electron beams versus pulsed corona discharges have also been demonstrated (Penetrante et al., 1996a,b) in the plasma treatment of 100 ppm of methylene chloride (C2H2CI2) in dry air at 25°C (see Fig. 11-74), and in the plasma treatment of 100 ppmof TCE (trichloroethylene, C2HCI3) in dry airat 25°C (see Fig. 11-75). Reactions... 

Figure 11-75. Electron beam and pulsed corona processing of 100 ppm TCE (trichloroethylene) in dry air at 25°C.

Note VC vinyl chloride TeCA l,l,2 -tetrachloroethane TCE trichloroethylene. 

This example shows the migration and degradation of TCE (trichloroethylene) and its reaction products cl2DCE (c-l,2-dichloroethene) and VC (vinyl chloride) in a zero-valent iron PRB (permeable reactive barrier) (Kandelwal and Rabideau, 1999) ... 

---