. 2017 Jun 29;8(6):627–633. doi: 10.1016/j.jare.2017.06.008

Table 3.

Residual crude oil content during bioremediation process in the various treatments. The initial crude oil concentration was 10 g/kg (left), 30 g/kg (right). Values expressed as mean ± S.E. (n = 3).

Sampling time (day)	Salinity (mM NaCl)	10 (g kg⁻¹)			30 (g kg⁻¹)
Sampling time (day)	Salinity (mM NaCl)	Natural attenuation	Biostimulation	Bioaugmentation	Natural attenuation	Biostimulation	Bioaugmentation
30	0	9.51 ± 0.06^no	8.59 ± 0.09^jk	7.53 ± 0.094^f	27.33 ± 0.223^lmn	25.78 ± 0.369^ij	24.67 ± 0.192^gh
	150	9.73 ± 0.08^op	9.18 ± 0.08^lm	7.83 ± 0.146^g	28.52 ± 0.123^p	27.54 ± 0.139^mno	25.54 ± 0.364^hij
	300	9.92 ± 0.05^p	8.93 ± 0.072^l	8.21 ± 0.101^hi	28.45 ± 0.104^op	27.85 ± 0.229^nop	24.74 ± 0.487^gh

60	0	8.66 ± 0.107^k	7.95 ± 0.112^gh	6.63 ± 0.098^d	26.34 ± 0.286^jk	24.04 ± 0.497^fg	21.64 ± 0.117^d
	150	9.13 ± 0.07^lm	8.65 ± 0.088^k	6.78 ± 0.125^d	27.63 ± 0.135^m–p	26.87 ± 0.319^klm	21.75 ± 0.185^d
	300	9.32 ± 0.08^mn	8.42 ± 0.092^ijk	7.18 ± 0.132^e	28.03 ± 0.2^nop	26.38 ± 0.178^jkl	22.75 ± 0.203^e

120	0	7.15 ± 0.245^e	6.72 ± 0.092^d	5.04 ± 0.143^a	23.30 ± 0.677^ef	21.80 ± 0.601^d	16.41 ± 0.73^a
	150	8.32 ± 0.105^ij	7.23 ± 0.056^e	5.32 ± 0.196^ab	26.75 ± 0.318^klm	25.23 ± 0.389^hi	18.02 ± 0.32^b
	300	8.54 ± 0.118^jk	7.16 ± 0.036^e	5.76 ± 0.163^c	26.89 ± 0.359^klm	24.62 ± 0.212^gh	19.28 ± 0.397^c

Similar lower case letters indicate that data are not significantly different from each other according to Duncan's multiple range test (P = 0.05).