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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.” More


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. More

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. More

March 13, 2009 - Washington Post
Probable Carcinogens Found in Baby Toiletries By Lyndsey Layton

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

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. More

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. More

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. More

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