“…I-P diffusion may not be the only process limiting as evidenced by the q t versus t 1/2 intercept of not crossing the point of origin. , The P-S-O model with R 2 = 0.8805 indicates that chemisorption could also be another rate-limiting step for MB dye adsorption on Raw-PFL. The results obtained is in line with those reported previously. ,− …”