Comments on “Synthesis and Adsorption of Ni(II) on Ni(II)-Imprinted Polyaniline Supported on Attapulgite Modified with 3-Methacryloxypropyltrimethoxysilane”

Abstract

Recently, Xu et al. (2013) published the paper entitled “Synthesis and adsorption of Ni(II) on Ni(II)-imprinted polyaniline supported on attapulgite modified with 3-methacryloxypropyltrimeth oxysilane.” In the “Adsorption Kinetics Models” section of the original paper, the authors had mentioned that “The formulas of the two kinetic models (the pseudo-first-order and pseudosecond-order kinetic models) are given as follows:” and cited a secondary material (Radeva et al. 2008) as a reference. However, there is nothing about pseudo-first-order and pseudo-second-order kinetic models in the cited reference Radeva et al. (2008). This is a quotation error. In addition, the correct volume of the reference Radeva et al. (2008) is ‘26’ not ‘7’ as mentioned in the original paper, which is a citation error. It is worth stating that “Citing the original paper not only respects the work of the authors who presented a novel research idea but also discussed this idea in detail in the body of their paper” (Ho 2010). In addition, typical isotherms such as BET (Brunauer et al. 1938), Langmuir (1918) and Freundlich (1906) all witnessed increased trends in citations especially in the last two decades (Fu and Ho 2014; Ho and Kahn 2014). In the case of pseudo-second-order kinetic model, the authors presented a linear form as follows: