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Synthesis, characterization, and properties of a selective adsorbent to mercury(II) ions

机译:汞(II)离子选择性吸附剂的合成,表征和性质

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A resin containing 3-(dimethylamine)propyl acrylate and 4-vinylpyridine was synthesized by radical polymerization (in 1:1 mole ratio). Ammonium persulfate (0.5 mol %) and N,N'-methylene-bis-acrylamide (2 mol %) were used as initiator and crosslinking reagents, respectively. The resin was characterized by Fourier transform infrared (FTIR) and ultraviolet-visible (UV-Vis) spectroscopy. The ability to bind Hg(H), Cd(II), Zn(II), Pb(II), Cu(H), and Cr(III) as well as the maximum adsorption capacity and elution of Hg(II) ions from the loaded resin was studied. Sorption selectivity from ternary mixture Hg(II), Cd(H), and Zn(II) was studied at the optimum sorption pH value. At pH 2 the adsorbent retained 98% of Hg(II); the retention of the other metal ions was lower than 20%. The elution assay was made in HClO4 solutions. (C) 2002 Wiley Periodicals, Inc. [References: 16]
机译:通过自由基聚合(以1∶1的摩尔比)合成包含丙烯酸3-(二甲胺)丙酯和4-乙烯基吡啶的树脂。过硫酸铵(0.5摩尔%)和N,N'-亚甲基双丙烯酰胺(2摩尔%)分别用作引发剂和交联剂。通过傅里叶变换红外(FTIR)和紫外可见(UV-Vis)光谱对树脂进行表征。结合Hg(H),Cd(II),Zn(II),Pb(II),Cu(H)和Cr(III)的能力以及Hg(II)离子的最大吸附能力和洗脱研究了负载树脂。研究了在最佳吸附pH值下三元混合物Hg(II),Cd(H)和Zn(II)的吸附选择性。在pH 2时,吸附剂保留98%的Hg(II);其他金属离子的保留率低于20%。在HClO4溶液中进行洗脱测定。 (C)2002 Wiley Periodicals,Inc. [参考:16]

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