A Novel Absorbent of Nano-Fe Loaded Biomass Char and Its Enhanced Adsorption Capacity for Phosphate in Water

Table 3

Adsorption isotherm parameters of samples BC and Fe-BC.

Samples	Langmuir isotherm model; 𝐶𝑒/𝑄𝑒=1/(𝑄max𝑘𝑙) + 𝐶𝑒/𝑄max			Freundlich isotherm model; lg𝑄𝑒 = lg𝑘𝑓 + 𝑛^−1lg𝐶𝑒
	𝑄max (mg/g)	𝑘𝑙 (L/mg)	𝑅^2	𝑘𝑓 (mg/g) (L/mg)^1/𝑛	𝑛^−1	𝑅^2
BC	15.44	0.038	0.978	1.628	0.484	0.943
Fe-BC	35.43	0.091	0.985	6.045	0.388	0.968