Toxicity of four nitrogen-heterocyclic polyaromatic hydrocarbons (NPAHs) to soil organisms

Ecotoxicity of wastes in avoidance tests with Enchytraeus albidus, Enchytraeus crypticus and Eisenia fetida (Oligochaeta)

“…Methodologically speaking, enchytraeids meet validity criteria and may be used in avoidance test as well as larger earthworms, similarly to the conclusions shown in the case of reproduction tests (e.g. Lock and Janssen, 2003;Kobetičová et al, 2008).…”

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“…FW, BW and MW samples were used in the study as a specimen to assess the probable toxic level of LRK and IRK on Nitrobacter which is a key environmental pollution monitor in aquatic ecosystem. The Lethal toxicity of IRK and LRK results also indicated that the increased kerosene concentrations resulted in high mortality rate of Nitrobacter which is suggestive of adverse negative effect on growth and survival of the species as earlier reported (Kobeticova et al, 2012). On the other hand, earlier Laboratory investigations have shown that nitrifying bacteria could utilize kerosene and other petroleum products as carbon source which may vary both in rates of utilization and growth profile (Eze et al, 2013a,b).…”

“…It is one of the refined petroleum products derived from crude oil by fractional distillation (Kobeticova et al, 2012). The number of carbon in kerosene (paraffin) ranges from 10-14 with boiling point of 1650-2000(Nihad and Mutlak, 2011.…”

Biodegradation of Various Aromatic Compounds by Enriched Bacterial Cultures: Part B—Nitrogen-, Sulfur-, and Oxygen-Containing Heterocyclic Aromatic Compounds

“…It took more than 312 h (14 days) and 264 h (11 days) for complete degradation of benzothiophene (50 mg/l) and benzofuran (100 mg/l), respectively. Kobeticova et al [33] showed that compounds with high log K ow are more toxic because they have the tendency to bioaccumulate in the micro-organisms. Their accumulation in the lipid bilayer is directly related to their concentration in the aqueous phase.…”