共查询到18条相似文献,搜索用时 156 毫秒
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研究了三种含硫氯的凝胶型螯合树脂对铂和铼的吸附和解吸性能。树脂对铂铼的吸附容量随树脂氮含量的增加而增加;随溶液中铂铼浓度的增大而增大;随溶液酸度的增大而下降。含铂和铼的溶液通过树脂柱,两种金属离子可全部被吸附,其饱和吸附容量可达353mgRe/g树脂和319mgPt/g树脂。吸附在树脂上的铂和铼可用解吸能力较弱的洗脱剂先洗脱铼,然后用解吸能力较强的洗脱剂洗脱铂。两者可在洗脱过程中达到有效的分离。洗脱率均在98%以上,树脂可再生重复使用。 相似文献
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合成了带有甲基、丙基、异丙基及苄基的四种仲胺树脂,并进一步与氯乙酸或丙烯酸反应得到氨羧乙酸及氨羧丙酸树脂,考察了所得十二种树脂对铜等十一种离子的选择吸附性能。 相似文献
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(一)概述离子交换树脂的应用范围极广,不论在工业生产上,在分析化学中都经常应用。由于离子交换树脂有着其特殊优点,即机械性能好,对于酸、碱及各种溶剂极为稳定,能将各种阳离子与其他杂质进行有效的分离,经洗脱、再生后可循环使用等等,因此常常作为一种简便有效的分离方法使用。然而事物总是一分为二的,离子交换树脂亦存在着它的不足之处,其中最主要的是缺乏选择性,各种离子间分离主要是凭藉其所谓“交换势”的不同,但是许多不同离子间“交换势”的差异是很不显著 相似文献
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螯合树脂研究——ⅩⅥ.以壳聚糖为母体的含硫、氮螯合树脂的合成及其吸附性能 总被引:13,自引:2,他引:13
壳聚糖与环硫氯丙烷反应合成了一系列含S和N的交联型螫合树脂。这类树脂对贵金属离子如:金、银、钯、铂等具有优良的吸附性能。 相似文献
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铜印迹螯合树脂对金属离子的吸附特性 总被引:2,自引:0,他引:2
研究了铜印迹螯合树脂与非印迹螯合树脂对金属离子的吸附性能,结果表明:铜印迹树脂对Cu^2 、Ni^2 、Zn^2 的吸附量比非印迹树脂有显著增大,两者对Cu^2 的吸附速率均较快,其表观吸附速率分别为0.044s^-1和0.040s^-1;印迹树脂对Cu^2 的吸附可用Langmuir或Freundlish等温式来描述;其动态吸附曲线与离子的起始浓度相关;用0.5mol/L HCl即可快速洗脱吸附的Cu^2 ,树脂具有较强的再生能力,可以重复使用。 相似文献
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本文报道了以多乙烯多胺为主链的巯基胺树脂与二硫化碳反应,合成了四种新型的氨基二硫代甲酸型螯合树脂,这类树脂对贵金属具有高的吸附容量和优良的吸附选择性。并通过红外光谱和X光电子能谱研究树脂及其金属螫合物。 相似文献
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新型螯合树脂研究(Ⅰ)——以聚硫醚为主链伯胺型树脂的合成及吸附性能 总被引:3,自引:0,他引:3
利用Gabriel反应以聚环硫氯丙烷为起始物合成4种新型的以聚硫醚为主链的伯胺型树脂,研究了树脂的合成条件及吸附性能.这些树脂对贵金属离子有很高的吸附容量,其中每克树脂对Au(Ⅲ)的吸附容量达到5~7mmol,对Ag+的为7~9mmol;而对贱金属离子吸附甚少.可望用于贵金属离子Au(Ⅲ)和Ag+的分离与富集. 相似文献
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通过纤维素多乙烯多胺衍生物2a~2c与1,3-二环氧丙基杯[4]芳烃3反应,合成了螯合树脂杯芳烃接枝纤维素4a~4c,用红外、元素分析和SEM等对其结构和形貌进行了表征.通过含氮量推算出新螯合树脂4a~4c中每个纤维素单元的杯芳烃接枝取代度分别为0.75、0.82和0.87.金属阳离子吸附性能实验表明,杯芳烃单元的引入在吸附过程中有重要作用,该螯合树脂结合了杯芳烃和纤维素的各自吸附性能优势,不仅吸附容量较高,而且表现出高的选择性吸附能力.树脂4b和4c对Ni2+离子表现出很高的吸附选择性,4a~4c的Ni2+饱和吸附容量分别达到2.96 mmol/g、2.93 mmol/g和2.66 mmol/g.在pH<4的强酸性条件下树脂的吸附能力迅速下降.该树脂用10%的氨水解吸附后有较好的重复使用性. 相似文献
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The adsorption and desorption behaviors of gold (III), palladium (II) and platinum (IV) were surveyed in column chromatographic systems consisting of one of the conventional anion-exchange resins of large ion-exchange capacity and dilute thiourea solutions. The noble metals were strongly adsorbed on the anion-exchange resins from dilute hydrochloric acid, while most base metals did not show any marked adsorbability. These facts made it possible to separate the noble metals from a large quantity of base metals such as Ag (I), Al (III), Co (II), Cu (II), ¶Fe (III), Mn (II), Ni (II), Pb (II), and Zn (II). Although it used to be very difficult to desorb the noble metals from the resins used, the difficulty was easily overcome by use of dilute thiourea solutions as an eluant. In the present study, as little as 1.00 μg of the respective noble metals was quantitatively separated and recovered from as much as ca. 10 mg of a number of metals on a small column by elution with a small amount of dilute thiourea solution. The present systems should be applicable to the separation, concentration and recovery of traces of the noble metals from a number of base metals coexisting in a more extended range of amounts and ratios. 相似文献
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The adsorption and desorption behaviors of gold (III), palladium (II) and platinum (IV) were surveyed in column chromatographic systems consisting of one of the conventional anion-exchange resins of large ion-exchange capacity and dilute thiourea solutions. The noble metals were strongly adsorbed on the anion-exchange resins from dilute hydrochloric acid, while most base metals did not show any marked adsorbability. These facts made it possible to separate the noble metals from a large quantity of base metals such as Ag (I), Al (III), Co (II), Cu (II), Fe (III), Mn (II), Ni (II), Pb (II), and Zn (II). Although it used to be very difficult to desorb the noble metals from the resins used, the difficulty was easily overcome by use of dilute thiourea solutions as an eluant. In the present study, as little as 1.00 microg of the respective noble metals was quantitatively separated and recovered from as much as ca. 10 mg of a number of metals on a small column by elution with a small amount of dilute thiourea solution. The present systems should be applicable to the separation, concentration and recovery of traces of the noble metals from a number of base metals coexisting in a more extended range of amounts and ratios. 相似文献