Biodegradation of Spilled Diesel Fuel in Agricultural Soil: Effect of Humates, Zeolite, and Bioaugmentation

Table 1

Experiment variants.

Variant	Composition
I	Soil
II	Soil + bacteria
III	Soil + bacteria + HS from lignite; 50 mg/kg dry weight
IV	Soil + bacteria + HS from lignite; 150 mg/kg dry weight
V	Soil + bacteria + HS from lignite; 450 mg/kg dry weight
VI	Soil + bacteria + HS from oxyhumolite; 50 mg/kg dry weight
VII	Soil + bacteria + HS from oxyhumolite; 150 mg/kg dry weight
VIII	Soil + bacteria + HS from oxyhumolite; 450 mg/kg dry weight
IX	Soil + bacteria + zeolite + HS from lignite; 50 mg/kg dry weight
X	Soil + bacteria + zeolite + HS from lignite; 150 mg/kg dry weight
XI	Soil + bacteria + zeolite + HS from lignite; 450 mg/kg dry weight
XII	Soil + bacteria + zeolite + HS from oxyhumolite; 50 mg/kg dry weight
XIII	Soil + bacteria + zeolite + HS from oxyhumolite; 150 mg/kg dry weight
XIV	Soil + bacteria + zeolite + HS from oxyhumolite; 450 mg/kg dry weight
XV	Soil + bacteria + zeolite

abbr.: HS: humate.