Field trial for MTBE bioremediation method

Article Abstract:

A bioremediation technique developed by microbiologist Joseph Salanitro of the Shell Development Company in Houston, Texas will be tested in a contaminated aquifer under California's Prt Hueneme Naval Base. The Salanitro bioremediation technique is based on a group of microorganisms which can degrade methyl tert butyl ether using only the addition of oxygen to degrade the compound to half of its initial concentration within a week. The end result of the of the complete degradation of MTBE is 100% carbon dioxide. The successful field testing of the Salanitro bioremediation technique would qualify the technique into one of the approved bioremediation techniques that will be employed by the Environmental Protection Agency.

Usage, Microorganisms, MTBE, Methyl tertiary butyl ether

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X-ray absorption fine-structure spectroscopy study of photocatalyzed, heterogeneous As(III) oxidation on Kaolin and anatase

Article Abstract:

X-ray absorption fine-structure spectroscopy (XAFS) is used to study As(lll) adsorption on bulk Georgia kaolin (KGa-1b), Wyoming smectite (SWy-2), anatase (TiO2), gibbsite (Al(OH)3), and amorphous silica (am-SiO2). This is done to identify the oxidants responsible for As(lll) oxidation in KGa-1b. The study showed the proportion of As(lll) oxidized by KGa-1b increased with rising pH (up to pH 8), and decreased slightly with increasing ionic strength.

Comment:

X-ray absorption fine-structure spectroscopy is used to study As(lll) adsorption on KGa-1b, SWy-2, TiO2, Al(OH)3 & am-SiO2

United States, Product information, Analytical Laboratory Instrument Manufacturing, Mass Spectrometers & Spectroscopy, Article

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X-ray absorption fine-structure spectroscopy study of photocatalyzed, heterogenous AS(III) oxidation on kaolin and anatase

Article Abstract:

An investigation into the photocatalyzed absorption of arsenic(As)(III) on such substrates as kaolin, smectite, anatase, gibbsite and amorphous silica showed over 30% of the As(III) being oxidized to As(V) using kaolin and anatase, while only 10% of the As(III) was oxidized using gibbsite and smectite. Titanium in both kaolin and anatase is believe to be responsible for accelerating the arsenic oxidation process.

Arsenic, Titanium

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