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Table 5 Langmuir and Freundlich isotherm constants for the adsorption of [Cr]T onto the pumice (pH = 9.1, T° = 21 °C)

From: Identification of two low-cost and locally available filter media (pumice and scoria) for removal of hazardous pollutants from tannery wastewater

Langmuir constants Freundlich constants
q m (g/kg) K L (L/kg) R 2 K F (L/kg) 1/n R 2
0.071 135.75 0.9464 250.5 − 0.897 0.9174