WCU Program of Chemical Convergence for Energy and Environment (C2E2), School of Chemical and Biological Engineering, College of Engineering, Seoul National University, Seoul, Republic of Korea.
J Colloid Interface Sci. 2011 Jul 15;359(2):505-11. doi: 10.1016/j.jcis.2011.04.034. Epub 2011 Apr 18.
Polyrhodanine-coated γ-Fe(2)O(3) nanoparticles, synthesized by one-step chemical oxidation polymerization, were applied to the process of removal of heavy metal ions from aqueous solution. Factors influencing the uptake of heavy metal ions such as solution pH, initial metal ion concentration, contact time, and species of metal ions were investigated systematically by batch experiments. The adsorption equilibrium study exhibited that the Hg(II) ion adsorption of polyrhodanine-coated magnetic nanoparticles followed a Freundlich isotherm model than a Langmuir model. The kinetic data of adsorption of Hg(II) ion on the synthesized adsorbents were best described by a pseudo-second-order equation, indicating their chemical adsorption. In addition, the synthesized nano-adsorbents can be repeatedly used with help of an external magnetic field due to their magnetic properties. This work demonstrates that the magnetic polyrhodanine nanoparticles can be considered as a potential recyclable adsorbent for hazardous metal ions from wastewater.
聚二硫二丙烷磺酸钠（Polyrhodanine）包覆的γ-Fe2O3 纳米粒子通过一步化学氧化聚合反应合成，被应用于从水溶液中去除重金属离子的过程。通过批量实验系统地研究了影响重金属离子摄取的因素，如溶液 pH 值、初始金属离子浓度、接触时间和金属离子种类。吸附平衡研究表明，聚二硫二丙烷磺酸钠包覆的磁性纳米粒子对 Hg(II)离子的吸附遵循 Freundlich 等温线模型，而不是 Langmuir 模型。Hg(II)离子在合成吸附剂上的吸附动力学数据最符合伪二阶方程，表明其为化学吸附。此外，由于其磁性，合成的纳米吸附剂可以在外加磁场的帮助下重复使用。这项工作表明，磁性聚二硫二丙烷磺酸钠纳米粒子可以被视为一种从废水中去除危险金属离子的潜在可回收吸附剂。
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