Comments on the paper "Removal of aqueous Hg(II) and Cr(VI) using phytic acid doped polyaniline/cellulose acetate composite membrane".

A mistake of using and applying pseudo-first order kinetic expression for adsorption systems has been pointed out. This discussion offered information for citing original idea of pseudo-first order kinetic expression. The original idea of initial adsorption rate calculated from pseudo-second order kinetic model was also presented. It suggested an important idea that author must not only be creative but also be careful while writing in order to publish more valuable and worth of reading papers.