İhlas Aura Cebilon Unique - Manual (Page 15)

Arsenic is generally found in two
forms in well water or groundwater:
Arsenic V (inorganic), +5 valence
arsenic, (also known as As(V)\As+5 or
arsenicum) and Arsenic III (organic),
+3 valence arsenic (also called As (III) \
(As + 3) or arsenicum). Arsenic dissol-
ved in water leaves no color, no taste,
no smell. Arsenic content can only be
measured in laboratory conditions
using special tests. All drinking water
supplied by state enterprises and
institutions must be tested for arsenic
content without fail. The results of
these tests can be obtained from the
local water supply organizations. If
you consume water from your own
well, you are also advised to have it
tested. To do this, you can obtain a list
of accredited laboratories certified in
this area from local health and
environmental authorities.
You can also get information about
the content of arsenic in water from
the official website of local state
water supply companies or the U.S.
Environmental Protection Agency
(www.epa.gov).
In water, arsenic is usually present in
the form of (As+5), (As+3) or a combi-
nation of both forms. It is possible to
determine exactly what form of
arsenic and what concentration of
arsenic is contained in water in the
laboratory by conducting special tests
on water samples taken using special
sampling procedures. To obtain this
service, you might contact the labora-
tories located at your place of
residence. Reverse osmosis (RO) water purifica-
tion systems do not have a good
ability to retain trivalent arsenic. They
are highly effective in purifying water
from pentavalent arsenic. Free
chlorine molecules quickly convert +3
valence arsenic (As+3) into +5
valence arsenic (As+5). At the same
time, other cleaning chemicals such as
ozone and potassium permanganate
are also able to convert +3 valence
arsenic to +5 valence. But chlorine
compounds (chloramine) do not do so
well with the task of converting +3
valence arsenic. If you are using city
water, it would be wise to ask the
providing establishment if they have
used free chlorine molecules or
chloramine in their water treatment.
The Aura Cebilon reverse osmosis
system is designed specifically to
purify water from +5 valence arsenic
(As+5). This system is not designed to
convert +3 valence arsenic (As+3) to
+5 valence arsenic (As+5). In laborato-
ry testing of the system, +5 valence
arsenic (As+5), at a concentration of
0.30 mg/L (ppm), was reduced to
levels below the EPA Standards and
Regulations for Arsenic in Drinking
Water US environments, below 0.010
mg/l (ppm) (0.004 mg/l). The result
obtained from the laboratory may
vary depending on the places of use,
usage conditions and the characteris-
tics of the inlet water. To monitor the
system's ability to retain arsenic,
regularly monitor the operation of all
system components.
15
Information about Arsenic