Biofunctional Characteristics of Lignite Fly Ash Modified by Humates: A New Soil Conditioner

Table 3

Correlation coefficients of the linear adsorption equations.

Isotherm equation	Temperature (K)	𝑅^2
Langmuir; 𝐶𝑒/𝑄𝑒=1/𝐾𝑄𝑚+(1/𝑄𝑚)𝐶𝑒	291	0.625
	308	0.608
	323	0.565
	338	0.445
	353	0.664
Freundlich; log𝑄𝑒=log𝐾𝐹+(1/𝑛)log𝐶𝑒	291	0.989
	308	0.962
	323	0.871
	338	0.722
	353	0.759
BET; 𝐶𝑒/𝑄𝑒(1−𝐶𝑒)=1/𝑋𝑚𝐾𝐵+((𝐾𝐵−1)/𝑋𝑚𝐾𝐵)𝐶𝑒	291	0.996
	308	0.929
	323	0.844
	338	0.880
	353	0.910
Harkins-Jura; 1/𝑄^2𝑒=𝐵/𝐴−(1/𝐴)log𝐶𝑒	291	0.840
	308	0.969
	323	0.792
	338	0.520
	353	0.834
Dubinin-Radushkevich; ln𝑄𝑒=ln𝑋𝑚−𝛽[𝑅𝑇ln(1+(1/𝐶𝑒))]^2	291	0.957
	308	0.856
	323	0.985
	338	0.806
	353	0.893