Natural Attenuation of Diesel Fuels Contaminated Medium Sand with Different Water Content in Vadose Zone
Comparative experiment of 3 medium sand columns was executed to research the influence of water content on natural attenuation of diesel fuels contaminated vadose zone. The results showed that: The lower the water content, the stronger capacity of retarding diesel fuels was. After a diesel fuels spill, the average concentration of TPH were 57.7 g•kg-1, 47.55 g•kg-1 and 31.95 g•kg-1 in medium sand with different water content (0.66 %, 8.00 % and 15.22 %). Besides, the TPH found 90 days after the natural attenuation degradated by 38 % and 44.62 % 4 of the initial contaminant load of the medium sand with water content 0.66 % and 8.00 %. Additionally, the higher the water content, the larger the microbial activity of sand was. Biodegradation was the important mechanism for natural attenuation of diesel fuels.
Z. H. Qu et al., "Natural Attenuation of Diesel Fuels Contaminated Medium Sand with Different Water Content in Vadose Zone", Advanced Materials Research, Vols. 179-180, pp. 619-624, 2011