School of Chemistry and Materials Science, Ludong University, Yantai, China.
J Hazard Mater. 2011 Feb 15;186(1):614-21. doi: 10.1016/j.jhazmat.2010.11.043. Epub 2010 Nov 18.
A novel method of surface modification was developed via iron (III)-mediated atom transfer radical polymerization, with activators regenerated by electron transfer (ARGET ATRP) on the surfaces of polystyrene resin-supported N-chlorosulfonamide groups. The well-defined polyacrylonitrile (PAN) was grafted onto the surfaces of the polystyrene (PS). The graft reaction exhibited first-order kinetics with respect to the polymerization time in the low-monomer-conversion stage. The cyano group of PAN-g-PS was modified by NH(2)OH·HCl to yield amidoxime (AO) groups. The AO groups had been demonstrated to be an efficient Hg-specific sorbent, which can remove Hg(2+) from solutions. No interference arose from common metal ions, such as Pd(2+), Ag(+), and Cu(2+). Three adsorption-desorption cycles demonstrated that this resin is suitable for reuse without any considerable change in adsorption capacity.
通过铁（III）介导的原子转移自由基聚合，在聚苯乙烯树脂负载的 N-氯磺酰胺基团表面开发了一种新的表面改性方法。在聚苯乙烯（PS）表面接枝了具有明确结构的聚丙烯腈（PAN）。接枝反应在低单体转化率阶段的聚合时间上呈现一级动力学。通过 NH(2)OH·HCl 将 PAN-g-PS 的氰基基团改性为偕胺肟（AO）基团。AO 基团已被证明是一种有效的 Hg 特异性吸附剂，可从溶液中去除 Hg(2+)。常见的金属离子，如 Pd(2+)、Ag(+)和 Cu(2+)，没有干扰。三个吸附-解吸循环表明，该树脂适用于重复使用，而吸附容量没有明显变化。
