82706-BB-ECP-GRANT-TITLE-ENVIRONMENTAL CHEMISTRY: INVESTIGATING THE ROLE OF BIOFILM IN AGING COMMODITY PLASTICS: MECHANISMS AND IMPLICATIONS FOR ENVIRONMENTAL DEGRADATION-THE OBJECTIVE OF THE PROPOSED EFFORT IS TO ADVANCE FUNDAMENTAL KNOWLEDGE IN ENVIRONMENTAL DEGRADATION OF MICROAND NANO- PLASTICS BY INVESTIGATING THE CHANGES IN THE SURFACE AND BULK MATERIAL PROPERTIES OF WEATHERED PLASTICS AS A RESULT OF URBAN RIVERINE BIOFILM FORMATION.