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Title
Study of non-ionic surfactant and foaming agent charge impact on flotation deinking of laser-printed waste paper
Authors
LUCIA KUCERKOVA MILAN VRSKA MARTINA BOTKOVA and STEFAN SUTY
Received
December 4, 2012
Published
Volume 47 Issue 9-10 October-December
Keywords
recycling, flotation, surfactant, statistical modelling
Abstract
The present contribution deals with the impact of acharge of a non-ionic surfactant and soft soap on the efficiency of
printing ink removal from a suspension of recycled fibres at various flotation times. To determine the optimum
conditions, a 3-factor experimental design using aStatgraphics software was used. The efficiency was evaluated by the
image analysis using a Motic Images 2.0 software.An equation relating the flotation efficiency and variables (such
assurfactant, soap, time), influencing significantly the flotation efficiency, was derived. A flotation efficiency of up to
96% can be attained via 5% surfactant addition, and 2% soap addition to oven-dry pulp for a flotation time of 25
minutes.
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