(full paper is archived in the Miller Library)
Title: Polychlorinated biphenyl (PCB) degradation in sediment
Student Author(s): Waldman, Frederic
Faculty Advisor(s): Phillips, John H.
Location: Final Papers Biology 175H
Date: June 1971
Keywords: marine pollution
Abstract: Three sediments were used to investigate biological reduction of Polychlorinated biphenyls (PCB's). The sediments were collected from the Salinas River, from under Fisherman's Wharf, and from fifty fathoms in Monterey Bay, California. Sediments were spiked with Aroclors 1232 and 1268, extracted with hexane, cleaned up with a Florisil micro-column, and analyzed by gas-liquid chromotography. Only one sediment, maintained at a temperature of 25 degrees C, showed such reduction. Prepaprations of sedments spiked with Aroclor 1232 to provide concentrations of .5 and 5 ppm showed appreciable reduction in four week, i.e. 46.4% and 67.2% respectively. The reduction due to evaporation in the autoclaved controls was 40.8% and 38.1% respectively. The less chlorinated biphenyls showed the greatest reduction of any kind in all Aroclor 1268 preparations during the four weeks of observation, and no reduction of Aroclor 1232 in the sediments incubated at 8 C and 12 C.