Isotherm parameters of N-acyl homoserine lactones (HSLs) sorption onto oxisol and alfisol.

Treatment	Langmuir model			Freundlich model
	q m (mg kg−1)	k L (L mg−1)	R 2	k F (mg kg−1) (mg L−1)−n	n	ΔG (kJ mol−1)	R 2
Oxisol
C6-HSL	55.15 ± 9.38	0.50 ± 0.49	0.997	18.33 ± 0.26	0.79 ± 0.02	−7.21 ± 3.37	0.999
C8-HSL	75.23 ± 20.22	0.39 ± 0.89	0.997	21.39 ± 0.38	0.84 ± 0.03	−7.59 ± 2.37	0.998
C10-HSL	99.85 ± 50.35	0.47 ± 1.34	0.994	33.61 ± 1.41	0.85 ± 0.05	−8.27 ± 0.85	0.995
C12-HSL	197.75 ± 290.51	0.65 ± 2.53	0.988	97.76 ± 19.70	0.91 ± 0.11	−11.36 + 7.39	0.981
Alfisol
C6-HSL	101.14 ± 3.45	0.28 ± 0.16	0.999	21.40 ± 0.17	0.84 ± 0.01	−7.59 ± 4.44	0.999
C8-HSL	114.34 ± 4.94	0.51 ± 0.11	0.999	41.19 ± 0.55	0.86 ± 0.02	−9.22 ± 1.50	0.999
C10-HSL	141.03 ± 9.74	0.89 ± 0.10	0.999	84.31 ± 2.65	0.87 ± 0.02	−10.99 ± 2.42	0.998
C12-HSL	263.39 ± 89.85	0.77 ± 0.49	0.994	168.54 ± 13.15	0.96 ± 0.04	−12.71 ± 6.39	0.999