Selective Adsorption of Mercury(II) on Chitosan Derivatives from Hydrochloric Acid
Selective Adsorption of Mercury(II) on Chitosan Derivatives from Hydrochloric Acid
复制标题
盐酸壳聚糖衍生物选择性吸附汞(II)
DOI：
10.2116/analsci.14.687
复制
发表时间：
1998
影响因子：
1.6
通讯作者：
Y. Kawano
中科院分区：
文献类型：
--
作者：
Y. Baba;N. Matsumura;Kohichiro Shiomori;Y. Kawano
新合成了交联N -（2-吡啶甲基）壳聚糖（PMC）、N -（2-噻基甲基）壳聚糖（TMC）和N -[3-（甲基硫）丙基]壳聚糖（MTPC）作为汞（II）的吸附剂。壳聚糖活性吸附位点的氨基在2-（氯甲基）氧环交联之前受到希夫碱形成的保护。用硼氢化钠还原希夫碱的亚胺部分，得到最终的壳聚糖衍生物。采用批量法研究了壳聚糖衍生物对盐酸中金属离子的吸附行为。这些壳聚糖衍生物在盐酸中对汞（II）对贱金属具有较高的选择性。在壳聚糖衍生物中，MTPC表现出对汞（II）的高选择性和高负载能力。澄清了PMC和MTPC在盐酸中吸附汞（II）的化学计量关系。
Crosslinked N -(2-pyridylmethyl)chitosan (PMC), N -(2-thienylmethyl)chitosan (TMC), and N -[3-(methylthio)propyl]-chitosan(MTPC) were newly synthesized as adsorbents of mercury(II). The amino group of the active adsorption site of chitosan was protected by Schiff’s base formation prior to being crosslinked by 2-(chloromethyl)oxirane. The final chitosan derivatives were obtained by reducing the imine moiety of the Schiff’s bases with sodium borohydride. The adsorption behavior of metal ions on the chitosan derivatives was examined from hydrochloric acid using a batchwise method. These chitosan derivatives exhibited high selectivities for mercury(II) over base metals in hydrochloric acid. Among the chitosan derivatives, MTPC especially exhibited high selectivity and a high loading capacity for mercury(II). The stoichiometric relations in the adsorption of mercury(II) on PMC and MTPC were clarified from hydrochloric acid.