Simplified-Undergraduate-Lab-Scale-Flotation-de-Inking-of-Newspaper-Print

Simplified-Undergraduate-Lab-Scale-Flotation-de-Inking-of-Newspaper-Print

  • Submitted By: Noffica
  • Date Submitted: 01/20/2011 4:20 PM
  • Category: Science
  • Words: 3180
  • Page: 13
  • Views: 633

SIMPLIFIED
 “FLOTATION
 DE-­‐INKING”
 OF
 NEWSPAPER
NAUMAN
 MITHANI
 (CHEM
 317
 -­‐
 2010
 SPRING)

1

PURPOSE
• de-­‐ink
 newspaper
 as
 per
 the
 technique
 of
 flota%on
 de-­‐inking
• •

scaled
 down
 &
 adapted
 for
 lab
 environment
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 improvised
 equipment focus
 on
 op#misa#on
 of
 variables:
✓ ✓

duraAon
 of
 flotaAon concentraAon
 of
 flotaAon
 agent temperature consistency
 (cs.
 %)
2

if
  possible

-­‐ -­‐

facts BACKGROUND:
 
 paper
 


paper,
 a
 ubiquitous
 material


a
 disposable
 material

recovered un-recovered



33%
 to
 50%
 of
 solid
 municipal
 waste*


100 paper (million tonnes) 75 50 25 0
50
4.5 50

a
 crucial
 parameter
 in
 the
 long-­‐term
 environmental
  sustainability
 of
 a
 large
 populaXon
 centre



so
 it
 must
 be
 recycled,
 which
 in
 turn
 consumes...
✤ ✤

water electricity


13.5

&
 other
 (environmental)
 resources

USA (2004) Canada (2006)



sustainability
 &
 expansion
 if:


high
 performance
 &
 high
 quality
 of
 recycled
 paper
3

*

Nie et al. Environmental Engineering and Policy (1998) vol. 1 (1) pp. 47-58

INTRO:
 chemical
 composiXon
 of
 paper


Paper,
 essenXally,
 is
 a
 felted
 sheet
 of
 cellulose
 fibres


actually,
 it
 is
 a
 complex
 mixture
 of
 
 chemical
 addiXves,
 fillers,
 bonding
 agents
 (upto
 ~40
 %
 weight)



Cellulose:
 (C6H10O5)n


bears
 a
 surfeit
 of
 O-­‐
 and
 OH
 groups
 
 
 
 
 
 
 
 
 network
 of
 H-­‐bonds
• •

highly...

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