Abstract: Demulsification of emulsified water-in-oil droplets was worked out with the employment of
wetting coalescence materials. Demulsification is carried out in conventional stirred-
column and packed-column. Among the four kinds of natural fibers and two kinds of inorganic
materials tested, natural fiber A, originated from wood shavings was found to give the best
performance of demulsification. The demulsification efficiency can exceed 96.5% when
demulsification conditions are optimized. The packed-column showed much better performance
both in terms of demulsification efficiency and repeated use of the recovered oil phase for
extracting cadmium in simulated wastewater. Operating variables governing the
demulsification efficiency were investigated.

Key words: demulsification, emulsion, wet coalescence, cadmium extraction

摘要： Demulsification of emulsified water-in-oil droplets was worked out with the employment of
wetting coalescence materials. Demulsification is carried out in conventional stirred-
column and packed-column. Among the four kinds of natural fibers and two kinds of inorganic
materials tested, natural fiber A, originated from wood shavings was found to give the best
performance of demulsification. The demulsification efficiency can exceed 96.5% when
demulsification conditions are optimized. The packed-column showed much better performance
both in terms of demulsification efficiency and repeated use of the recovered oil phase for
extracting cadmium in simulated wastewater. Operating variables governing the
demulsification efficiency were investigated.

关键词: demulsification;emulsion;wet coalescence;cadmium extraction