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A novel magnetic chelating adsorbent (CPMS) with iminodiacetate functionality was prepared by polymerization of glycidyl methacrylate-iminodiacetic acid (GMA-IDA) monomer with N, N-methylenebisacrylamide as crosslinker in the presence of monodisperse magnetic silica microspheres (MS). CPMS was characterized by IR, SEM, VSM and TGA. The experimental results revealed that MS was embedded in the gel polymer, but the morphology of CPMS was irregular. The saturation magnetization for CPMS was found to be 28.4 emu/g, and the percentage of GMA-IDA polymer grafted on MS was about 46.5%. CPMS were shown to be efficient for the removal of Pb(II) ions at pH 3.0 - 6.0, and the adsorption data obeyed the Langmuir equation with a maximum adsorption capacity of 54.4 mg?g?1 at pH 5.0. Moreover, the adsorption rate of CPMS was fast and it took about 5 minutes to achieve adsorption equilibrium in aqueous solution of lower lead ions concentration. 相似文献
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以溶剂热法合成了凹多面体六方相的CuS微晶,较系统地研究了铜源与硫源的配比、反应物浓度、反应时间、温度以及不同的配体对产物的形貌和尺寸的影响.采用醋酸铜为铜源,乙酰丙酮为配体,铜试剂为硫源的乙醇溶剂热法,在160 ℃,反应24 h,获得了对称的凹多面体六方相CuS微晶.采用XRD、SEM、UV-Vis等对产物进行了表征.UV-Vis结果表明CuS微晶的紫外吸收发生了明显的蓝移,显示了较强的量子效应,并推断了其可能的生长机理. 相似文献
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采用二环己基碳二亚胺缩合法由α-硫辛酸和苯并三唑合成了硫辛酰苯并三唑,产率75%,并利用FTIR和^1HNMR对产物进行了表征;通过考察硫辛酰苯并三唑对胰岛素的化学修饰作用,进一步证明了它的合成是成功的,并且对胰岛素的侧链氨基呈现较高的修饰反应活性。 相似文献
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微乳液中酶催化木素-酚共聚物的性能研究 总被引:1,自引:0,他引:1
用过氧化物酶进行了酶促木素与酚共聚反应。结果表明 ,由于在木素分子间引入了聚甲酚片段 ,共聚物的热性能有较大改善。聚合物的重均分子量随反应温度的升高而增加 相似文献
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