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Name: ACTIVATED ALUMINA
CAS No 1344-28-1
· —
NAS/CWTC 027-82
Chemical Formula: A1203 xH2O Where x = approx. 0.4
Description:
White, odorless, insoluble granules.
Use:
Used to remove arsenic, fluoride, and selenium.
Purity Requirements:
Analyses of available grades of activated alumina show
the presence of chromium but at levels far below that
which would necessitate RMIC values based on a maximum
use of 2 g/liter of water. If analyses are desired, the
following protocol is recommended.
Bulk Sample Collection:
Sample in accordance with Standard for Granular Activated
Carbon, AWWA B604-74, American Water Works Association,
Denver, Colorado (1974).
Analytical Sample Preparation:
Extraction Solution--Add 47 ml of 0.1 N sodium hydroxide
to 100 ml of 0.1 M potassium hydrogen phthlate and dilute
with deionized water to 200 ml. me resultant solution
will have a pH of 5 + 0.05.
amid e Prenaration--Grind sample to fit through a 40-mesh
screen. Weigh 5 g of sample into a 400-ml beaker and add
200 ml of extraction solution. Add 1 drop of nonionic
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detergent (wetting agent). Cover with watch glass and
agitate with a magnetic stirrer for 1 hour + 5 minutes.
Filter through No. 40 Whatman filter paper. Use filtrate
for analyses.
Sample Analyses:
Analyze the filtrate in accordance with Standards Methods
for the Examination of Water and Wastewater, 15th Edition,
American Public Health Association, Washington, D.C.
(1981).
Chromium
Section 304
Representative terms from entire chapter:
potassium hydrogen
