The author of 《Selective high capacity adsorption of Au(III) from aqueous solution by poly(glycidyl methacrylate) functionalized with 2,6-diaminopyridine》 were Zhang, Bing; Wang, Shixing; Fu, Likang; Zhang, Libo; Zhao, Jiling; Wang, Chen. And the article was published in Polymer Bulletin (Heidelberg, Germany) in 2019. Safety of 2,6-Diaminopyridine The author mentioned the following in the article:
A new adsorbent was synthesized by functionalizing poly(glycidyl methacrylate) with 2,6-diaminopyridine for the selective adsorption of Au(III) from aqueous solution The fourier transform IR spectrometer, XPS and scanning electron microscope demonstrated that 2,6-diaminopyridine was successfully grafted onto poly(glycidyl methacrylate). The batch adsorption experiments were conducted to evaluate the adsorption abilities of the adsorbent. The results show that the adsorbent exhibits high adsorption capacity (459.29 mg/g) for Au(III) at pH 4. The adsorption process of Au(III) are well described by pseudo-second-order kinetic model. The adsorption isotherm is well-obeyed Langmuir and D-R models. The calculated thermodn. parameters of the adsorption process are: ΔG0 = – 24.2 kJ/mol; ΔH0 = 37.0 kJ/mol; ΔS0 = 205.4 J/mol K. The adsorbent is interacted with Au(III) through chelation and ion exchange between the amines groups and Au(III). Moreover, the adsorbent shows good selectivity from the interfering ions and can be reused at least five times. The experimental part of the paper was very detailed, including the reaction process of 2,6-Diaminopyridine(cas: 141-86-6Safety of 2,6-Diaminopyridine)
2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Safety of 2,6-Diaminopyridine