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Arsenic Removal
Quantum DMI-65 Media
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 DMI-65
has been shown to be effective in the removal of arsenic and
other metals when there is iron present in the water.
Arsenic associates with the iron and the DMI-65, which has
an affinity for metals, attracts the iron/arsenic. If there
is no iron in the water, ferric chloride can be added to
cause the arsenic to combine with the iron. Ferric chloride
may also need to be added when there are higher levels of
arsenic present. In a laboratory test, approximately 78 PPB
of arsenic and a small amount of ferric chloride were added
to uncontaminated well water, which was then run through
DMI-65 Media. The results showed that the DMI-65 Media
reduced the arsenic from 78 PPB down to < 1 PPB. In full
scale applications, the DMI-65 can be simply backwashed with
clean chlorinated water and then put back into service. It
does not have to be regenerated like conventional green sand
media.
If you are interested in running a pilot test for the
removal of arsenic or other metals such as mercury,
aluminum, or cyanide, please contact
K2O Consulting.
| Technical Specifications |
| Physical Properties |
Operating Conditions |
| Color |
Brown to Black |
pH Range |
5.8 - 8.6 |
| Bulk Density |
91.0 lbs. / ft 3 |
Maximum Water Temp. |
113° F (45° C) |
| Specific Gravity |
2.69 |
Minimum Bed Depth |
24 Inches (600 mm) |
| Effective Size |
0.48 mm |
Freeboard |
40% Minimum |
| Uniformity Coefficient |
1.3 |
Service Flow Rate |
2-12 GPM / ft2 |
| Mesh Size |
20-50 |
Backwash Flow Rate |
10-20 GPM / ft2 |
| Annual Attrition |
1-5% |
Backwash Expansion |
15-50% |
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Advantages of DMI-65 Media
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- Wide pH Range - Stable and satisfactory performance at pH 5.8 – 8.6
- High Flow Rates - DMI-65 can operate at linear filtration velocities up to twice that of conventional media with a corresponding reduction in capital equipment costs.
- Higher Operating Temperature - Maximum operating temperature of 113o F (45o C).
- Long Life - DMI-65 is not consumed in the process, providing considerable advantages over other processes or media.
- Regeneration not Required - After initial activation, only sodium hypochlorite feed is required.
- System Compatibility - Physical properties are similar to that of competitive media allowing conversion to DMI-65 without major hardware modifications.
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