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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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本文叙述了用于测定天然海水中多氯联苯的气相色谱分析方法,本法采用国产1300(1)型树脂提取富集天然海水中PCBs,在2000ml空白海水中添加100ng PCB5/l,让其通过树脂柱,树脂柱对多氯联苯的平均富集效率为87.4%样品提取液通过微型硅胶混合层析柱,旨在净化与分离经与同类的分析方法比较,本方法使用有机溶剂及固体吸附剂用量少,既经济、省时,又可降低分析过程的试剂空白值。本方法用普通氮气代替K-D浓缩器浓缩样品提取液,操作简便快速。用2000ml空白海水与2000ml天然海水分别添加25-125ng PCB5/l的标准溶液,让外加标准的海水样品通过分析全过程,其平均回收率在66-73%,变异系数在±10%之内,试验结果表明,本方法适于测定表层海水中ng/l级的多氯联苯。 相似文献
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本文介绍了海水中ng/L含量获氏剂的GC分析方法:即树脂柱的预处理和样品中获氏剂的富集、提取黄铜矿;样品提取液的脱水、净化、分离和GC测定;获氏剂的确证试验;方法的试验结果。 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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