以2-烯丙基硫代-5-(4-吡啶基)-[1,3,4]噻二唑(AST)、苯乙烯(St)为单体,Hg(Ⅱ)离子作为模板,制备了新型的汞离子印迹共聚物(Hg(Ⅱ)-IIP).采用傅里叶变换红外光谱仪(FT-IR)和扫描电镜(SEM)对印迹和非印迹聚合物的结构和形貌进行了表征.以原子吸收光谱法(FAAS)为检测手段,研究了 Hg(Ⅱ)-IIP 对 Hg (Ⅱ)离子的吸附和选择识别能力.结果表明,在 pH 值5~8条件下,30 min 即可达吸附平衡,饱和吸附量是38．5 mg/g.以0．1 mol/L HCl 与0．5 mol/L 硫脲水溶液作为洗脱剂,洗脱率达97％.Hg(Ⅱ)/Cd(Ⅱ),Hg (Ⅱ)/Co(Ⅱ),Hg(Ⅱ)/Ni(Ⅱ),Hg(Ⅱ)/Zn(Ⅱ)和 Hg(Ⅱ)/Mn(Ⅱ)的相对选择性系数分别为6．56,14．9,14．5,8．53和12．1,体现了 Hg(Ⅱ)-IIP良好的选择吸附和识别能力.
A new Hg(Ⅱ)ion-imprinted polymer(Hg(Ⅱ)-IIP)microspheres was synthesised for the separation and recovery of Hg(Ⅱ)ion from water sample.Hg(Ⅱ)-IIP was prepared by copolymerisation of 2-allylsulfa-nyl-5-(4-pyridinyl)-[1,3,4]thiadiazole (AST),phenylethylene(St)and Hg(Ⅱ)ion.The structure and mor-phology of Hg(Ⅱ)-IIP and NIP were characterized by Fourier transform infrared spectroscopy(FT-IR)and scanning electronmicroscopy(SEM).The adsorptive properties and the selectivity recognition ability of Hg(Ⅱ)-IIP were investigated.The results indicated that the maximum adsorption capacity was 38.5 mg/g,the adsorp-tion capacity reached equilibrium need 30 min at pH 5-8.Using 0.1 mol/L HCl and 0.5 mol/L thiourea as de-sorption solvent,the desorption rate was more than 97%.The relatively selective factor (αr)values of Hg(Ⅱ)/Cd(Ⅱ),Hg(Ⅱ)/Co(Ⅱ),Hg(Ⅱ)/Ni(Ⅱ),Hg(Ⅱ)/Zn(Ⅱ)and Hg(Ⅱ)/Mn(Ⅱ)are 6.56,14.9,14.5,8.53 and 12.1,respectively.Hg(Ⅱ)-IIP had excellent adsorption and selective recognition properties.
参考文献
| [1] | Determination Of Mercury In Water And Fish Samples By Cold Vapor Atomic Absorption Spectrometry After Solid Phase Extraction On Agar Modified With 2-mercaptobenzimidazole[J].Journal of hazardous materials,20092/3(2/3):982-987. |
| [2] | Mojtaba Shamsipur;Hamid Reza Rajabi;Mohammad Hassan Beyzavi.Bulk polymer nanoparticles containing a tetrakis (3-hydroxyphenyl)porphyrin for fast and highly selective separation of mercury ions[J].Mikrochimica Acta: An International Journal for Physical and Chemical Methods of Analysis,20139/10(9/10):791-799. |
| [3] | Hamid Reza Rajabi;Mahmoud Roushani;Mojtaba Shamsipur.Development of a highly selective voltammetric sensor for nanomolar detection of mercury ions using glassy carbon electrode modified with a novel ion imprinted polymeric nanobeads and multi-wall carbon nanotubes[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,2013:16-22. |
| [4] | 谢志海;张瑜;王海力;王玲燕;滕晓晓.铜离子印迹聚合物的制备及吸附性能研究?[J].功能材料,2014(22):22060-22064,22069. |
| [5] | Dhruv K. Singh;Shraddha Mishra.Synthesis, characterization and removal of Cd(Ⅱ) using Cd(Ⅱ)-ion imprinted polymer[J].Journal of hazardous materials,20092/3(2/3):1547-1551. |
| [6] | Ivanka Dakova;Tanya Yordanova;Irina Karadjova.Non-chromatographic mercury speciation and determination in wine by new core-shell ion-imprinted sorbents[J].Journal of hazardous materials,2012Sep.15(Sep.15):49-56. |
| [7] | Dakova, I;Karadjova, I;Georgieva, V;Georgiev, G.Ion-imprinted polymethacrylic microbeads as new sorbent for preconcentration and speciation of mercury[J].Talanta,20092(2):523-529. |
| [8] | Andac M;Mirel S;Senel S;Say R;Ersoz A;Denizli A.Ion-imprinted beads for molecular recognition based mercury removal from human serum[J].International Journal of Biological Macromolecules: Structure, Function and Interactions,20072(2):159-166. |
| [9] | M. Monier;D.A. Abdel-Latif.Synthesis and characterization of ion-imprinted chelating fibers based on PET for selective removal of Hg~(2+)[J].Chemical engineering journal,2013:452-460. |
| [10] | Li, Min;Feng, Changgen;Li, Mingyu;Zeng, Qingxuan;Gan, Qiang.Synthesis and application of a surface-grafted In (III) ion-imprinted polymer for selective separation and pre-concentration of indium (III) ion from aqueous solution[J].Hydrometallurgy,2015:63-71. |
| [11] | 范洪涛;李晶;李展超;阎峰;孙挺.水热辅助表面接枝印迹法制备Cd（Ⅱ）离子印迹硅胶及其性能研究[J].功能材料,2012(15):2060-2064. |
| [12] | Yan Liu;Zhanchao Liu;Jie Gao;Jiangdong Dai;Juan Han;Yun Wang;Jimin Xie;Yongsheng Yan.Selective adsorption behavior of Pb(II) by mesoporous silica SBA-15-supported Pb(II)-imprinted polymer based on surface molecularly imprinting technique[J].Journal of hazardous materials,20111(1):197-205. |
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