text: Yo, check it out, we got a natural groundwater system,
  But it's been messed up by pollutant phenols, man, what a rhythm!
  In the lab, we did some sacrificial microcosm experiments,
  Using aquifer sediment and groundwater, tryna make sense.
  
  We inoculated anaerobic microcosms with nitrate and phenols,
  And watched those pollutants degrade, breaking down their roles.
  Phenol and p-cresol, they degraded real fast,
  In just 35 days, they were a thing of the past.
  
  Inorganic carbon and intermediates were generated,
  But O-cresol, man, that stubborn one, it hesitated.
  Carbon in the water phase, it was conserved,
  We kept a close eye on groundwater-sediment interactions, observed.
  
  Carbon stable isotope data, we used to monitor,
  And the mass balance for solution TIC, it was a scorer.
  p-cresol degradation led to sedimentary carbonate dissolution,
  Carbonic acid formed, causing some pollution.
  
  We used compound-specific carbon isotope analysis, GC-IRMS,
  Lookin' for that 13C enrichment, man, it's a worm.
  We found a slight enrichment, just a little boost,
  With an epsilon of -2.5/1000, it got us loose.
  
  This fractionation effect, it's got potential, you see,
  For gettin' those in situ degradation rates, believe me.
  These microcosm experiments, they shed some light,
  On the distribution of nitrate and phenols, day and night.