Accuracy of referencing is important for the transmission of scientific knowledge. However, an unacceptable rate of citation and quotation errors has been found in the literature [1, 2]. Greater emphasis and responsibility must be placed on authors to check the accuracy of cited references in their submitted manuscripts [2]. In Journal of Radioanalytical and Nuclear Chemistry, Volume 283, two articles, entitled ‘‘influence of contact time, pH, soil humic/ fulvic acids, ionic strength and temperature on sorption of U(VI) onto MX-80 bentonite’’ [3] and ‘‘effect of pH, fulvic acid and temperature on sorption of Th(IV) on zirconium oxophosphate’’ [4], presented a ‘‘pseudo-second-order rate equation,’’ but cited 2 and 3 secondary material, respectively, as references. In these two articles, the authors presented the ‘‘pseudosecond-order rate equation’’ with equation t qt 1⁄4 1 2kqe þ t qe while in fact, the definition of the equation for the adsorption systems of divalent metal ions using sphagnum moss peat has been presented by Ho [5], and this expression has also been published in 1996 [6]. A modified equation was presented in 1998 to correct a mistake in the previous paper published in 1996 [7, 8]. Two most suggested papers for the pseudo-second-order kinetic equation were published in 1984 and 1995 by Blanchard et al. [10] and Ho [5, 9], respectively. Blanchard et al. noticed the overall exchange reaction of NH4 ? ions fixed in zeolite by divalent metallic ions in the solution using a second-order kinetic model 1 n0 n ð Þ a 1⁄4 Kt where n is amount of M 2? fixed or the amount of NH4 ? released at each instant, n0 is exchange capacity, and K is rate constant [10]. Ho used the pseudo-second-order kinetic model to the divalent metal ions/sphagnum moss peat adsorption system. The adsorption involved not only cation exchange but also chemical bonding [5, 11]. The pseudo-second-order kinetic model
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Jan 1, 2024
Weichuan Xu + 5
Open Access