6-(4'-烟酰胺基)苯基-3-(3'-吡啶基) 哒嗪并[3,2-c]1,2,4-三唑的制备及其对Hg(Ⅱ)离子吸附性能

doi:10.11944/j.issn.1000-0518.2016.11.160069

摘要/Abstract

摘要：

利用3-(4-溴苯基)-6-氯哒嗪和烟肼合成了新化合物 6-(4'-烟酰胺基)苯基-3-(3'-吡啶基)哒嗪并[3, 2-c]1,2,4-三唑(K₂),通过红外光谱、核磁共振氢谱和碳谱等技术手段对化合物K₂进行了表征。化合物K₂可以选择吸附Hg(Ⅱ)离子。通过火焰原子吸收法(FAAS)检测Hg(Ⅱ)离子吸附,结果表明,在pH值6.0~8.0条件下,20 min即可达吸附平衡,饱和吸附量为45.60 mg/g。以0.50 mol/L HCl与1.00 mol/L硫脲作为洗脱剂,洗脱率达97%。对Cd(Ⅱ)、Co(Ⅱ)、Ni(Ⅱ)、Zn(Ⅱ)和/Mn(Ⅱ)的选择性系数分别为5.67、6.70、10.20、8.90和9.21,体现了化合物K₂良好的选择吸附能力。化合物K₂对Hg(Ⅱ)离子的吸附符合准二级动力学反应控制的化学吸附过程和Langmuir模型。

关键词: 汞离子, 吸附材料, 吸附性能, 共轭结构

Abstract:

6-(4'-Nicotinamido)phenyl-3-(3'-pyridinyl)pyridazino[3,2-c]1,2,4-triazole(K₂) was prepared by 3-(4-bromophenyl)-6-chloropyridazine and nicotinic hydrazide, and characterized by infrared spectroscopy, ¹H- and ¹³C- nuclear magnetic resonance spectroscopy. The adsorptive properties and the selectivity of compound K₂ for the separation of Hg²⁺ were investigated. The results indicate that the maximum adsorption capacity is 46.50 mg/g. The adsorption capacity reaches equilibrium within 20 min at pH 6.0~8.0. Using 0.50 mol/L HCl and 1.00 mol/L thiourea as desorption solvent, the desorption rate is more than 97%. The selective factor(α) values of Hg(Ⅱ) for Cd(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Zn(Ⅱ) and Mn(Ⅱ) are 5.67, 6.70, 10.20, 8.90 and 9.21, respectively. These indicate that compound K₂ has excellent adsorption and selective properties. The experimental data follow the Langmuir adsorption model and a pseudo-second-order model.

Key words: mercury(Ⅱ), adsorption material, adsorption property, conjugated structure

陈敦, 马亚丽, 吐尼沙古丽, 阿吾提, 司马义, 努尔拉. 6-(4'-烟酰胺基)苯基-3-(3'-吡啶基) 哒嗪并[3,2-c]1,2,4-三唑的制备及其对Hg(Ⅱ)离子吸附性能[J]. 应用化学, 2016, 33(11): 1322-1328.

CHEN Dun, MA Yali, Tunsagnl Awut, Ismayil Nurulla. Preparation of 6-(4'-Nicotinamido) phenyl-3-(3'-pyridinyl) pyridazino [3,2-c]1,2,4-triazole and Its Adsorption Performance for Mercury(Ⅱ) Ions[J]. Chinese Journal of Applied Chemistry, 2016, 33(11): 1322-1328.

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