Dynamic Adsorbents’ Alumina
Judged Best in Industry
Dynamic Adsorbents’ Alumina products have
been found by independent laboratory analysis to be demonstrably
superior due to a low amount of fines compared with major
competitors and with the least amount of trace metal impurities
compared with all other competitor’s products. When announcing
the results, DAI President Dr. Mark Moskovitz said, “Our line of
adsorbents offer precisely what chromatographers have come to
expect from all DAI products – the best alumina, the best silica
and the best bonded phase packing material available for
academic or industrial usage.”
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2009
April 20, 2009 - Watertechonline.com
Chicago ’burb knew tainted water
went to taps: report
CHICAGO — The safety of drinking water in the
village of Crestwood, a Chicago suburb, is the center of an
investigation by the Chicago
Tribune, which reported on April 19 that village
officials for more than two decades supplemented the community’s
publicly supplied water with municipal well water tainted with
two chemicals related to a dry-cleaning solvent. The solvent,
erchloroethylene (PCE), is linked to cancer, liver damage and
neurological problems. According to the
Tribune report,
officials knew of the high levels of dichloroethylene and vinyl
chloride polluting the well water, but, in a cost-cutting
measure, continued to use the well to augment village supplies.
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April 20, 2009 - AP
Studies find factories release
pharmaceuticals
Federal scientists testing for pharmaceuticals in water have
been finding significantly more medicine residues in sewage
downstream from public treatment facilities that handle waste
from drugmakers. Early results from two pivotal federal studies
compare wastewater at treatment plants that handle sewage from
drugmakers with those that do not. The studies cover just a
small fraction of the 1,886 pharmaceutical manufacturing
facilities counted in a 2006 U.S. Census report.
April 20, 2009
AP IMPACT: Tons of released
drugs taint US water
U.S. manufacturers, including major
drugmakers, have legally released at least 271 million
pounds of pharmaceuticals into waterways that often provide
drinking water
— contamination the federal government has
consistently overlooked, according to an Associated Press
investigation.
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March
13, 2009 - Washington Post
Probable Carcinogens Found in Baby
Toiletries By Lyndsey Layton
NOTE:
Dynamic Adsorbents manufactures various
aluminas used in the cleanup of
pollutants mentioned in the article below.
More than half the baby shampoo, lotion and other infant
care products analyzed by a health advocacy group were found
to contain trace amounts of two chemicals that are believed
to cause cancer, the organization said yesterday. Some of
the biggest names on the market, including Johnson & Johnson
Baby Shampoo and Baby Magic lotion, tested positive for
1,4-dioxane or formaldehyde, or both, the nonprofit Campaign
for Safe Cosmetics reported. More
2008
Utilization of Nanometre-order Diameter Columns inside Porous
Anodic Alumina for Chromatography Chip System
Porous anodic alumina (PAA)
membranes were used as a nanometre-order diameter column for
chromatography chip with acetonitrile–water mobile phase
using gradient elution. In a chromatogram,
9-anthracenemethanol (AM), 9-anthracenecarboxylic acid (AC),
and dansyl–glycine (DG) showed different retention times,
indicating that PAA membranes are applicable to stationary
phase for chromatography chip.
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1998
Adsorption of textile dyes on alumina.
Equilibrium studies and contact time effects R.F.P.M.
MOREIRA*, M.G. PERUCH and N. C. KUHNEN
Abstract - The use of
nonconventional adsorbents, particularly those that can be
easily regenerated, to replace activated carbon in the
removal of color from dye wastewaters has been recently
proposed. This work shows a thermodynamic and kinetic study
of the adsorption of reactive dyes (yellow
monochlorotriazine and yellow dichlorotriazine), in liquid
phase, on commercial alumina. The basic thermodynamic data
were obtained using the static method, with a thermostatic
bath at four different temperatures (30, 40, 50 and 60oC)
and different pH values. The kinetic data were obtained by
adding a known quantity of adsorbent to a dye solution at a
constant temperature and under controlled stirring
conditions. It was possible to draw the uptake curves, using
the effects of the stirring on the adsorption rate. The
intraparticle effective diffusivity was estimated using the
film and pore diffusion model. The results were compared
with the data obtained using a commercial activated carbon.
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2004
Ultrafiltration and Alumina Adsorption
of Micelles for the Preconcentration of Copper(II) in Water
Masataka HIRAIDEand Tsuyoshi ITOH
Micellar-enhanced
ultrafiltration was considered from the viewpoint of trace
analysis, by taking copper(II) as an example. Copper(II)
cations were collected electrostatically on micelles of
sodium dodecyl sulfate, and separated from the mother liquor
by ultrafiltration. However, the final solution contained a
large amount of surfactant, which caused serious
interference in the determination. This problem was overcome
by using alumina adsorption, where negatively charged
micelles were adsorbed on positively charged alumina
particles and then recovered by conventional filtration. The
copper was leached from the micelles with 4 mol l-1 nitric
acid, leaving the surfactant on the alumina. The proposed
method was successfully applied to an analysis of certified
reference water samples.
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