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I. INTRODUCTION AHP resin is a new type of adsorbent and has been studied by the units concernedfor several years. There is little report about this work so far. AHP resin was synthesizedin aqueous phase with tetra-ethylene pentamine (TEPA), epichlorohydrin (ECH) andC-reagent as raw materials, and basic zinc carbonate (P_Z_n) and rubber solvent oil (120Gasoline) as pore-forming material. Compared with the technique of the amorphous lumpresin and that of the resin synthesized in oil phase, the new technique of resin synthesizedin aqueous phase manifests many advantages, such as raising the capacity of uranium-adsorption of the resin, simplifying the after-treatment process, reducing the cost, etc. Sea water, in which all kinds of cation and anion exist, is a system of electrolytes,and the concentrations of many ions are higher than the concentration of uranium for 相似文献
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MECHANISM OF URANIUM ADSORPTION ON AMIDOXIME RESIN 总被引:1,自引:0,他引:1
The mechanism of uranium adsorption from seawater by polyacrylamidoxime resin is investigated by means of the experiments of adsorption isotherm and adsorption rate. The uranium uptake increases with the adsorption temperature and varies with the pH of seawater. Thermochemical and kinetic calculation show that the enthalpy change (△H) and the activation energy (E) of the uranium adsorption are 42.4 42.4 kJ mol-1 and 41.2 kJ mol-1 respectively, indicating that the uranium adsorption on the resin proceeds via a certain complex chemical reaction in which the amidoxime group in the resin chelates uranyl ions. 相似文献
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应用有机吸附剂从海水中提取铀,资料上已有若干报道.Davies.R.J,等曾经报道过用甲醛、间苯二酚胂酸缩合的树脂,虽然这种树脂交换容量大(通水112天,1010微克铀/克),选择性好,提取率高,但它在水中缓慢水解,吸附能力下降,溶损也较大(2.3%初量/周),因而没有得到进一步的发展.Bayer,E.提出用聚乙二醛三氨基苯酚和经硅藻土烧结的聚丙烯氧肟酸树脂,从海水中提取铀和铜等金属,但吸附量不很高,树脂的强度也差,因此很快就中断了研究.苏联一些学者也报道了用AH、等阴离子交换树脂提取铀的研究工作.AH-2Φ树脂具有一定的吸附量(30微克铀/克),在海水中比较稳定,但交换容量很低,价格也较贵. 相似文献
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