In situ remediation of petroleum hydrocarbons in the Antarctic and sub-Antarctic

摘要: The results of 2 bioremediation experiments conducted in Antarctica were presented. aim the study was to improve situ remediation techniques cold, remote locations using tracer tests and intensive monitoring. Sampling used assess effectiveness a permeable reactive barrier (PRB) at Casey Station, Antarctica. A micro-bioventing trial Macquarie Island. PRB installed prevent off-site migration hydrocarbons promote biodegradation organic compounds. comprised 5 cage pallets containing different treatments granulated materials separated by mm galvanized steel plates. Treatments consisted controlled release nutrients front barrier, hydrocarbon nutrient sorption middle, excess effluent end. Materials included zeolite, Max bac, activated carbon, sand. Water from catchment directed into barriers subsurface drains. Residence times proportion flow measured with salt test analyzing breakthrough curves throughout PRC. Tracer bypass or short-circuiting flow. micro bioventing Island provide maximum oxygenation shallow, water-saturated 20-year old fuel spill. biovents monitored in-situ oxygen sensors. samples collected before after aeration. Respiration rates estimated stopping aeration process compared laboratory studies determine nutrient, oxygen, moisture status. Results for showed that hydraulic conductivity all treatments. Estimates slopes each residence time curve ranged 2000 m/d 4000 m/d. mass distribution 30 per cent 15 cent. use mini-injection points connected manifold more effective than water-saturated, anaerobic soil. 8 refs., 1 tab., 7 figs.