The analysis of the microbial populations of two soil sites contaminated with heavy metals : an honors thesis (HONRS 499)

Abstract

The purpose of examining the microbiological flora of soils contaminated with heavy metals, particularly lead (Pb) and cadmium (Cd) is to collect information that will show the effect of heavy metal contaminants on the microbiology of the soils. The soils chosen for investigation are local sites. The eventual subsequent step would be to use the local flora of the soils to develop effective bioremediation plans. The effect of heavy metal contaminants varies with the soil being investigated. The Memorial Drive Dump site shows consistent increase in bacterial, actinomycetes, and fungi counts over a 50 day test period. The Glynwood site shows decrease in bacterial and actinomycete counts, but an increase in fungal counts over the 50 day test period. The addition of a composted sewage sludge and oat seeds were added to some of the soils of both sites. The presence of both of these additions lead to increased levels of bacteria, actinomycetes, and fungi over the soil samples without additional treatments.