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Table 3 Langmuir and Freundlich constant value results from linear fitting and free energy values for CCF and DCCF

From: Influence of phosphorus and nitrogen co-doping of activated carbon from littered cigarette filters for adsorption of methylene blue dye from wastewater

Isotherm

Parameter

CCF

DCCF

Langmuir

Qmax (mg g−1)

213

303

KL (L mg−1)

0.08

0.38

R2

0.911

0.986

Freundlich

KF (mg g−1(L mg− 1)1 n− 1)

54

121

n

3.85

4.55

R2

0.874

0.828

Gibb’s free energy

ΔGo (kJ mol−1)

−5.8

−11.1

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Sustainable Environment Research

ISSN: 2468-2039

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