Comparative Bioremediation of Crude Oil-Amended Tropical Soil Microcosms by Natural Attenuation, Bioaugmentation, or Bioenrichment

Table 2

Physical and chemical characteristics of Cantagalo and Panelas soils.

Soil property	Cantagalo/ RJ	Panelas/SE
pH	6.3	4.6
P (mg dm^−3)	13	6
K (mmol^c dm^−3)	7	2.2
Ca (mmol^c  dm^−3)	43.3	27
Mg (mmol^c  dm^−3)	38.5	12
Al (mmol^c  dm^−3)	0	3
H + Al (mmol^c  dm^−3)	35.3	85
Na (mmol^c  dm^−3)	0.6	1.7
V (%)^a	72	34
m (%)^b	0	2.3
ISNa (%)^c	0	1
Fe (mg dm^−3)	35.33	312
Cu (mg dm^−3)	0.42	0.8
Zn (mg dm^−3)	5.45	2
Mn (mg dm^−3)	98.97	3.8
Sand (%)	76	66
Silt (%)	8	12
Clay (%)	16	22
Classification^d	Sandy-loam	Clay-sandy

^aBases saturation index; ^baluminum saturation index; ^csodium saturation index. ^dtrilinear soil classification was made according with the percentages of sand, silt, and clay [21].