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Point Source
End of Pipe
Water Reuse
Waste Minimization
Cost Savings
Environmental Compliance
Pretreatment and reuse of contaminated rinse waters
Remove up to 99% of your ionic contaminants.
System Description
Manchester's Ion Exchange System removes specific ions from
dilute rinse water, thus allowing reclamation of metals and/or
reuse of the water. |
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This widely used technology removes positively
charged ions (cations) such as Ca++, Mg++, Cu++ and Ni++,
and negatively charged ions (anions) such as SO4--, NO3-,
HCO3-, CI-, and F-.
All ion exchange reactions involve the substitution of one
cation or anion for another, with the resulting ion concentrations
remaining unchanged. |
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For example, removal of one positively charged
nickel ion (Ni++), requires substitution of two hydrogen (H+)
or two sodium (Na+) ions. Similarly, anions are removed through
the substitution of appropriate hydroxyl ions.
When the Manchester Ion Exchange System is in the regeneration
mode, the accumulated metal ions are chemically removed from
the resin, using an acid wash for cations and a caustic solution
for anions. The regenerating solution contains the appropriate
specific ions in concentrated form. |
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Point Source Ion Exchange
Manchester's Point-Source Ion Exchange System (Figure A)
reclaims a specific metallic ion from a rinse water containing
only that specific ion. The regenerant can be further processed
to form a high-purity metallic solid. Cation resins alone
can provide discharge metal concentrations between 0.01 and
0.5 mg/L, depending on resin selection and column design.
The only wastewater treatment required after cation exchange
is usually pH adjustment.
Point Source Ion Exchange with Water Reuse
Manchester's Point Source Ion Exchange System with water
reuse (Figure B) permits 100% water recycling from specific
metal-processing operations. The discharge from the cation
column removes the metallic ions by replacing them with hydrogen
ions, leaving the water acidic.
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The addition of an anion column to the system
removes the anions remaining in solution by replacing them with
hydroxyl ions (HO-) that combine with the hydrogen ions (H+)
to form deionized water. The actual design of these systems
may require the addition of carbon or other treatment to remove
organics. |
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