首页> 外文期刊>Separation and Purification Technology >Selective separation and preconcentration of cyanide by a column packed with cyanide-imprinted polymeric microbeads
【24h】

Selective separation and preconcentration of cyanide by a column packed with cyanide-imprinted polymeric microbeads

机译:通过装有氰化物印迹聚合物微珠的色谱柱对氰化物进行选择性分离和预浓缩

获取原文
获取原文并翻译 | 示例
           

摘要

Using the strategy of template polymerization, specific metal-complexing polymer which is poly(methacryloylhistidine-Ni(II)-CN~) (P(MAH-Ni(II)-CN~-)) has been prepared. This polymer is able to specifically recognize the cyanide ion. For this purpose, nickel(II)-methacry-loylhistidine dihydrate complex monomer was synthesized and then reacted with KCN. Monomer-template complex phase was polymerized in dispersion medium. After polymerization, the template (CN~-) was removed from the P(MAH-Ni(II)-CN~) microbeads getting CN~ ion imprinted metal-chelate polymer. CN" imprinted metal-chelate polymer can be used several times without considerable loss of adsorption capacity. When the adsorption capacity of CN~ imprinted microbeads were compared with nonimprinted microbeads, CN~ imprinted microbeads have higher adsorption capacity. The K_d values for the CN~- -imprinted microbeads show increase in K_d for CN~ while K_d decreases for SCN~-, S~(2-), Cl~-, NO_3~- and SO_4~(2-) ions and the K values are greater than 1 for imprinted microbeads of CN~-/SCN~-, CN~/S~(2~), CN~(-1)/C1~, CN~-/NO_3~- and CN~/SO_4~(2-) are 43.37, 54.78, 109.1, 117.2 and 167.9, respectively. Determination of CN~ ion in waste water showed that the interfering matrix had been almost removed during preconcentration. This means that CN~ can be determined even in the presence of SCN~-, S~(2-), Cl~-, NO_3~- and SO_4~(2-) ions.
机译:使用模板聚合策略,制备了特定的金属络合物聚合物,即聚(甲基丙烯酰基组氨酸-Ni(II)-CN-)(P(MAH-Ni(II)-CN--))。该聚合物能够特异性地识别氰化物离子。为此目的,合成了镍(II)-甲基-氯基组氨酸二水合物配合物单体,然后与KCN反应。单体-模板络合物相在分散介质中聚合。聚合后,从P(MAH-Ni(II)-CN〜)微珠上除去模板(CN〜-),得到CN〜离子印迹的金属螯合物聚合物。可以多次使用CN“印迹金属螯合物,而不会显着降低吸附能力。当将CN〜印迹微珠的吸附能力与未印迹微珠进行比较时,CN〜印迹微珠具有更高的吸附能力。CN〜的K_d值-压印的微珠显示CN〜的K_d增大,而SCN〜-,S〜(2-),Cl〜-,NO_3〜-和SO_4〜(2-)离子的K_d减小,且对于K〜d的K值大于1 CN〜-/ SCN〜-,CN〜/ S〜(2〜),CN〜(-1)/ C1〜,CN〜-/ NO_3〜-和CN〜/ SO_4〜(2-)的印迹微珠为43.37 ,分别为54.78、109.1、117.2和167.9。测定废水中的CN〜离子表明,在预浓缩过程中干扰基质几乎被去除,这意味着即使存在SCN〜-,S〜也可以测定CN〜。 (2-),Cl〜-,NO_3〜-和SO_4〜(2-)离子。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号