The Open Environmental Engineering Journal




(Discontinued)

ISSN: 1874-8295 ― Volume 7, 2014

Bio-Remediation and Physicochemical Interaction of Experimentally Contaminated Soils in Uganda with Diesel


The Open Environmental Engineering Journal, 2012, 5: 44-49

Denis Bbosa, Noble Banadda, Peter Mulamba

Agricultural and Bio-systems Engineering Department, College of Agricultural and Environmental Sciences, Makerere University, P.O. Box 7062, Kampala, Uganda.

Electronic publication date 13/7/2012
[DOI: 10.2174/1874829501205010044]




Abstract:

This study was conducted for a period of 4 weeks to monitor and evaluate the process of bio-stimulation and natural recovery rates in terms of bacteria and fungi communities to diesel contaminated soils. In this study, laboratory experiments were conducted to measure pH, moisture content, Potassium (K), Phosphorous (P), Organic Nitrogen (ON), Organic Carbon (OC), Organic Matter (OM), fungi and bacteria cells before and after soils were intentionally contaminated with diesel. The results of this study showed that treatment level, K, P and pH have a positive effect on the number of bacterial cells whereas moisture content, sand and clay particles impact negatively. A correlation coefficient of R2 = -0.93 was obtained between time and OC, OM, ON while OC, OM, ON and bacteria showed an R2 = -0.58. Three conclusions can be drawn based on this study. One, by week 4, bacterial cells counts had doubled. Two, by week 4, bacterial counts numerically outnumbered fungal cells. Three, the increase in both bacterial and fungal cells was accompanied with a decrease in OM, OC and ON. This means that both bacterial and fungal cells had adapted by week 4.


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