Bioavailability — the Key Factor of Soil Bioremediation

摘要: In the last two decades it has been shown that many pollutant compounds being found in soils or aqueous ecosystems may potentially be transformed by microorganisms. Transformation either completely into carbon dioxide and water, at least non-toxic metabolites (Klein 2000). These promising research results inspired remediation companies to set up particular bioremediation approaches for clean-up of such contaminated areas. The bio-enthusiasm early years, however, is now followed a more realistic sometimes even sceptical view bioremediation. major reason this turn-around become clear obtained laboratory with artificially do not necessarily indicate what happen actually field soil from sites. With hydrophobic pollutants like PAH (Bossert et al. 1984; Erickson 1993; Schaefer 1995; Weissenfels 1992) some sorts mineral oil (Angehrn 1997; Bossert Riis 1998) particular, observed degradation mineralisable lab-culture incomplete practical Considerable residual concentrations analytically detectable are subsequently left behind. An example typical “hockey-stick-kinetic” (a term coined M. Alexander, see Chapter 14) fig. 13.1.