American Water Resources Association 
Philadelphia Metropolitan Area Section 

Welcome to the AWRA-PMAS

...providing a forum for discussion and exchange of information and ideas relative to water resources management issues specific to our metropolitan area. 

Upcoming Event

Please note new meeting date and room. Meetings will now be held on the second Wednesday of the month in the Planning Commission Conference Room, same building and floor.

Suppression of Acid Mine Drainage from Pyrite through the use of Adsorbed Phospholipid

Daniel R. Strongin, Ph.D.

Department of Chemistry, Temple University

Abstract: Research has addressed the chemistry relevant to the environmental problem referred to as Acid mine drainage (AMD), resulting from the oxidation of metal-sulfides, primarily pyrite.  This environmental impact of AMD includes acidification of rivers and streams as well as leaching of toxic metals from the metal-sulfide material.  Studies in our laboratory have investigated the use of phospholipid layers on pyrite to suppress the oxidation of the mineral in abiotic and biotic conditions.  Even in the presence of iron oxidizing bacteria the lipid layer, which assembles into a bilayer structure, significantly suppresses the rate of pyrite oxidation. Recent studies have investigated the ability of the adsorbed lipid layers to suppress pyrite oxidation under environmental conditions for times approaching three years. In particular, using columns packed with mining waste (with and without lipid adsorption), the release of sulfate and soluble iron was investigated in addition to the pH of the effluent. Mining waste that was pretreated with phospholipid was associated with an effluent that had a higher pH and significantly lower amounts of sulfate and iron than mining waste that was not pretreated with phospholipid. Metagenomic analysis of the microbial communities associated with the mining waste samples revealed the development of AMD-like communities dominated by acidophilic sulfide-oxidizing bacteria on untreated samples, but not on mining waste pretreated with phospholipid.   

Daniel Strongin is a Professor of Chemistry at Temple University. He has a strong interdisciplinary scientific interest in the area of surface chemistry, with an emphasis on understanding the chemistry of environmentally relevant surfaces. His particular expertise is in the application of surface spectroscopic techniques for the investigation of the surface chemistry and reactivity of mineral and nanoparticle surfaces. Dr. Strongin’s research effort includes the study of the corrosion of sulfide minerals, the sequestration of toxic metals by carbonate minerals, and the use of nanomaterials for the environmental remediation of toxic materials. 

One Parkway Building 
1515 Arch Street
18th Floor Planning Commission Conference Room
Philadelphia, PA

Our meetings are held the 2nd Wednesday of each month, September through June.  Please click on "Events" link to register for this meeting and to see a listing of future meeting dates and topics.

2014/2015 Board Leadership

 President:  Chris McEntee, Greeley & Hansen
 President Elect:  Bridget Wadzuk, Villanova University  
 Vice President:  Benoit Van Aken, Temple University 
 Treasurer:  Bernadette Callahan, Stantec Consulting
 Secretary:  Stefanie Rittenhouse, PA DEP Southeast Region
 Membership Chair:  Adam Minichelli, Greeley & Hansen
 Social Co-Chairs:  Nha Truong, Philadelphia Water Department
   Daniel Wible, CH2M Hill
 Student Co-Chairs:  Amanda Hess, Villanova University
   Sibia Ranjbar, Temple University
 Past President:  Jaclyn Rogers, Philadelphia Water Department

Thanks to our Organization Member Sponsors

- Michael Baker Jr., IncCDM - CH2M Hill -

Greeley and Hansen -

- Hatch Mott MacDonaldHazen and Sawyer -

- McCormick Taylor Engineers & Planners -

 - Philadelphia Water Department - Riordan Materials -

- Stantec Consulting -

Temple U. Dept. of Civil and Environmental Engineering

Sci-Tek Consultants, Inc. - Warren Glass LLP - Villanova University


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