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Chemical composition and biological properties of weathered drilling wastes

Śliwka E., Kołwzan B., Grabas K., Klein J., Korzeń R.

Environment Protection Engineering

2012

Vol. 38, nr 1

129-138

Chemical and biological properties of 8 samples of drilling wastes from the long-term storage sites in the areas of oil various chemical composition (content of petroleum contaminants 0.6-27.6 wt. %, content of toxic heavy metals 117-730 mg/kg d.m.), and a low susceptibility to biodegradation (within the range of 11-58% during the 60-days experiment) were determined. I was found that samples having higher aliphatic/aromatic hydrocarbons ratio were more susceptible to biodegradation. Considering the high contents of the petroleum contaminants, in which the polar component i.e. resins and asphaltenes, are present, all the tested wastes a treat hazard to the environment. The components of potential mutagenic and carcinogenic properties have been found only in the single samples from a wastes series before and after biodegradation.

Oxidative metabolism, mutagenic and carcinogenic properties of some polycyclic aromatic hydrocarbons

Łuczyński M. K., Góra M., Brzuzan P., Wilamowski J., Kozik B.

Environmental Biotechnology

2005

Vol. 1, No. 1

16--28

This attempt to synthesize the present state of knowledge on the correlation between the structure of chosen PAHs and their mutagenic or carcinogenic activity shows that the dependencies cannot be treated univocally. Extreme complexity of the subject, typical for investigations on the boundary between chemistry and biology, inclines one to search for new ways of synthesis of new compounds, which would be of interest for biologists studying the problem of chemical carcinogenesis. On the other hand, there is a strong need for elaborating a standardized test that would explicitly define the carcinogenic properties of a specific compound. The use of a variety of methods for the determination of carcinogenic potency of chemical compounds combined with simultaneous differentiation of structure of examined compounds, sometimes leads to contradictory conclusions. Correlation between mutagenic and carcinogenic activity of some compounds is also sometimes questionable. Modern molecular biology should allow for elaborating a method which would give a satisfactory and reliable answer to the fundamental question: is a specific compound carcinogenous for a human organism? And if so - to what extent?