Abstract:

In order to realize the recycle of gasi

fied highconcentration phenol

containing wastewater, experiments were carried out to find out the extracting e

ffects of the system with different concentrations, pH, temperature and solvent

ra

tio (the volume of extracting solvent to wastewater), and an extracting system u

sing 30% TBPkerosene solution as an extracting agent was set up. Experiments w

e

re carried out to find out the reverse extracting effects of different NaOH solu

tion concentrations and solvent ratios (the volume of extracting solvent to wast

ewater), and a reverse extracting system using NaOH solution as reverse extrac

ting agent was set up. The experiments for reusing the extractant were performed

. T

he results showed that the rate of dephenolization was higher than 97.0%, the re

cov

ery rate of phenol was 93.4%, the total recovery rate of phenol was about 90.0%,

 a

nd the phenol in wastewater after extracting can be reduced from 2259.8mg·L

^-1 t

o less than 75mg·L^-1. The experiments also showed that the 30% TBP ke

rosene was a good ind

ustrial extractant that could be reused reusing several times. The 30% TBP ker

osene and the NaOH solutio

n system could success recycle phenol of highconcentration phenolcontainin

g wastewater, which could reduce the burden for the following processing. 

Key words: highconcentration phenolcontaining wastewater, tributyl phosphate (TBP), extracting dephenolization, reverse extracting