it was found that P
adsorptiononpyrrhotitefitbothFreundlichandLangmuirisotherm
models at 11.3 and 21◦
C, and fit Langmuir isotherm model better
thanFreundlichmodel at 29◦
C.It canbe inferredthat P adsorption
on pyrrhotite should be chemisorption because Lamgmuir adsorption isotherm is usually considered better to describe single-layer
adsorption.