Biodegradation of Weathered Petroleum Hydrocarbons Using Organic Waste Amendments

Figure 6

Changes in soil nutrient levels over 15 weeks as a function of treatment: (a) nitrogen; (b) phosphorus; and (c) organic carbon. M: molasses; C: plant compost; PM: papermill sludge; AC: activated carbon; and CON: control. () indicates that data for the treatment were significantly different ( < 0.05) from the control.

(a)

(b)

(c)