Surveillance of the condition of bacteria and Amaranthus viridis in a gasoline contaminated soil

摘要

The condition of bacteria andAmaranthus viridisin gasoline-contaminated soil was surveyed. The soil was treated with different concentrations of petrol oil: 0 ml (control), 18, 56, 112, 168 and 224 ml. Each of the concentrations was in triplicates. Seventeen (17) bacterial isolates were recovered from the control soil while twenty (20) bacterial isolates were recovered from the polluted soil. A total of twenty four (24) different genera were recovered from the soil. The organisms areAcinetobacter ceticus, Actinomycessp, Aerococcus viridians, Alcaligenes paradoxus, Arthrobacter, Bacillus cereus, Bacillus polymxa, Bacillus subtilis, Chromobacterium violaceum, Clostridiumsp., Corynebacterium hydrocarbodastus, Corynebacterium kutsceri, Corynebacterium xerosis, Cytophagasp., Erwiniasp., Flavobacteriumsp., Micrococcus luteus, Proteus vulgaris, Pseudomonas fluorescens, Pseudomonas putida, Sarcina ventricule, Serratiasp., Staphylococcus aureus,andStreptococcussp. The pH, temperature, organic matter content, moisture content and water holding capacity of the soil were determined.A. viridishad 100% germination in both the control (0 ml) and 18 ml gasoline-treated soils while it had delayed germination in the other treatments (56, 112, 168 and 224 ml). The results obtained in this study showed that gasoline spillage posses a great threat to the survival and development of plants. It also revealed that certain bacteria could survive the gasoline-contaminated soil and thus may be useful in biodegradation and/or bioremediation of gasoline contaminated soils.