Effects of Nanoscale Carbon Black Modified by HNO₃ on Immobilization and Phytoavailability of Ni in Contaminated Soil

Table 1

The best-fit model parameters for adsorption of Ni²⁺ on CB and MCB.

Sorbents	Pseudo-first-order model			Pseudo-second-order model			Langmuir isotherm			Freundlich isotherm
	(mg/g)	(min^−1)		(mg/g)	(g/(mg·min))		(mg/g)	(L·kg^−1)		(mg/g)
CB	1.220	0.1101	0.5077	36.49	0.1532	0.9999	39.22	0.008901	0.9205	6.104	0.7576	0.9823
MCB	3.032	0.1010	0.6919	44.25	0.01799	0.9999	49.02	0.01200	0.8272	2.934	0.7740	0.9926