Environmental Engineering Reference
In-Depth Information
Table 13.2
Amounts (tons) of metal estimated in man-made resources in Japan by Shiratori and
Nakamura (
2007
)
Metal
Category
Total
amount
Recycle
ratio (%)
Amount not
recycled
Amount
estimated
in WEEE
Remarks
Au
Electronics/
machine
134
40
80.4
42
Ag
Electronics/
photo
672
30
470.4
670
Except
battery
Pt
Electronics/
catalyst
1.9
30
1.33
1.5
Pd
Electronics/
catalyst
7
30
4.9
3.7
Cu
Electronics/wire 1,530,000 90
153,000
110,000
Pb
Battery/solder
39,000
30
27,300
10,300
Includes
pigment
Sn
Electronics/
solder
12,400
30
8680
5300
Zn
Galvanizing/
battery
6800
25
5100
11,900
Galvaniz-
ing not
considered
Ni
Electronics/
battery
4800
25
3600
7000
Superal-
loys not
considered
Cd
Battery
600
25
450
220
Co
Magnet/battery
11,070
20
8856
Unknown
Ga
GaS, GaP
53
20
42.4
23
In
ITO, solder
486
90
63
46
Ge
Fluorescent
materials
7700
20
6160
Unknown
Ta
Condenser
205
20
164
133
REE(Nd,
Sm, Dy, L)
Magnet/battery
4000
20
3200
Unknown
E-scrap generated by local government is mainly landfilled and also part of the E-
scrap collected by small traders is shipped aboard both legally and illegally.
Small domestic appliances were not widely collected before a new recycling law
was enforced from April 2013. Overall, the potential weight of WEEE generated
per capita in Japan has reached 20 kg—similar to other well developed countries.
However, the collection rate is below 50 %. In particular, the collection rates for
high grade WEEE such as PCs and cellular phones are small and hidden flows for
these products still exist. This is despite E-scrap being an excellent source of minor
metals so that E-scrap recycling should be one of the key measures to ensure a
stable supply of minor metals.
The recycling flow for non-ferrous metals in Japan is shown in Fig.
13.8
. E-scrap
containing non-ferrous metals is finally recycled in non-ferrous metal smelters
