Page 69 - Industrial Wastewater Treatment, Recycling and Reuse

metal
highly prone to scale forming or fouling of the
carbon
of
are
use
difficult
settling
needed,
major
al.,
ions
of
the
with
activated
recovery
et
carbon
gaining
composite
without
a
Fe
longer
a
(Sun
is
UF
is
becomes
because
wastes
turbidity
or
or
additives
on
the
specific
also
Electroflocculation
membranes
filtration
adsorption
electroplating
Mg(OH) 2 /Al 2 O 3
However,
necessary
resins
is
and
coagulants
When
polyethyleneimine
exchange
flocs
with
nanostructure
of
is
membranes.
importance.
the
application
adsorption
drawback.
Pretreatment
from
chemical
of
2009).
ion
using
time
ions
or
forms
discharge
most
wastewater 50 treatment—cont'd Methods Treatment Limits Industrial Wastewater Treatment, Recycling, and Reuse to ferrous oxidize to is method key The task. oxidation different the because form ferric pH different at precipitate to found are states Fe 3+ with at Fe 2+ and 4 pH at precipitating 7. p
for
mg/L
in Discharge 1–3 0.1–5.0
removal many from
metal and run-off fungicides
important of industries, industry,
of Effluents industries alloy pigment,
Examples in Electroplating other and batteries,
1.4 Occurs Brass
Table Metal Fe Zn