Arsenic Research Project

Partners: Engelhard Corporation, Iselin, NJ | B.F. Environmental Consultants, PA | Wilkes University, Wilkes- Barre, PA

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Photos of Various Phases of Project

Initial Static Testing

Mixing Apparatus Used to Conduct Static Testing

Samples were then filtered preserved with acid, digested and analyzed for Arsenic using a Graphite Furnace.

Kinetics Experiments

Because mixing did NOT provide adequate contact with the material

An EPA tumbling / extraction device was used to try and maximize contact between the material and the fluid

As part of the Kinetics Experiments, the seven materials were evaluated by exposing a controlled amount of the material to a known mass of arsenic. Subsamples were collected at the following time intervals: 1 minute, 15 minutes, 30 minutes, 2 hours, 4 hours, 8 hours, and 24 hours.

As part of the project, the pH / mv of the test solution was monitored prior to starting the testing and during each sampling. A series of samples were tested under a variety of solution pH.

After preservation and digestion the samples were analyzed by Graphite Furnace Atomic Absorption. During the analysis, known QC/QA samples were evaluated to evaluate the accuracy and percision of the data.

A preliminary summary report has been submitted by the team to Mrs. Valerie Bell, Engelhard Project Researcher. The laboratory technician in the photos is Mr. John Pagoda.

He was a research assistant and consultant working with the Center for Environmental Quality at Wilkes University.

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Arsenic Treatment Products / Screening Equipment