Removal of Arsenic
a method of removing aqueous arsenic species from natural water having a pH
range from 3 to 8.
a method of removing arsenic species in the form of both arsenate and
arsenite from an aqueous medium without the need to oxidize arsenite to
a method of removing aqueous arsenic species from an aqueous medium to a
detection level for arsenic species of 5 ppb.
an inexpensive sorbent material to remove aqueous arsenic species from an
aqueous medium, which does not need to be reused in order to be economically
a cost effective means to remove aqueous arsenic species from an aqueous
medium, which will not leach aqueous arsenic species and can be readily
disposed of as non-hazardous waste.
arsenic-laden zeolites have passed the EPA's Toxicity Characteristic
Leaching Procedure test and can be safely disposed of in a non-hazardous
ZS500As has a capacity of 2-2.5 g AsV/kg media and 8-9g AsIII/kg media. The
effect of pH and the presence of sulfates appear to have little effect on the
Laboratory work is underway to test the performance of the media under a
variety of possible industrial and municipal conditions.
The media has
applications for other contaminants as well, most notable chromium. While the
capacity of the media is not fully determined single column challenge tests on a
solution containing 105 ppm CrVI treated over 442 bed volumes of solution with a
minimum removal rate in excess of 97%.
Use of the product in multiple columns in series would increase the
efficacy of the metals removal substantially.
A modification of the system increased its capacity to 2442 bed volumes
with a minimum removal rate of 96%.
Test work underway
by Physical Sciences, Inc. also shows an affinity for the removal of mercury in
the gaseous form using a similar technology.
Material is being evaluated by a number of engineering companies,
including a pump and treat at an abandoned pesticide facility, several mining
operations and water utilities.
Inc. has a diversified line of products uses for which the following Data Sheets
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