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首页> 外文期刊>Journal of Applied Polymer Science >PREPARATION OF POLYACRYLOAMIDOXIME CHELATING CLOTH FOR THE EXTRACTION OF HEAVY METALS FROM WATER
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PREPARATION OF POLYACRYLOAMIDOXIME CHELATING CLOTH FOR THE EXTRACTION OF HEAVY METALS FROM WATER

机译：用于从水中提取重金属的多酰氨基肟螯合布的制备

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Woven polyacryloamidoxime cloth was prepared from the polyacrylonitrile precursor via reaction in methanolic hydroxylamine. Preparation was controllable and reproducible and the reaction conditions were optimized with respect to the time of conversion, the concentration of NH2OH . HCl, and the temperature of conversion. The cloth produced had a large capacity for Cu(II) and Pb(II) of 71.2 and 450 mg g(-1) (1.12 and 2.17 mmol g(-1))respectively, and adequate physical properties suitable for rigorous use. Sorption profiles of Pb (II) and Cu(II) were similar to those of chelate ion exchange resins and fibers containing the amidoxime group. The rate of uptake of metals by the cloth was found to be dependent on the percent surface area converted to amidoxime groups, the concentration and type of metal being tested for, and the time of exposure. Anomalous kinetics of sorption for Pb(II) and Cu(II)by cloth of increasing amidoxime group content were explained by a two-part sorption mechanism. Distribution coefficients of 3.5 x 10(6) and 1.5 x 10(6) for Cu(II) and Pb(II) were observed, and the average rates of uptake for Cu(II) and Pb(II) were 600 and 200 mu g g(-1) day(-1) (9.4 and 0.96 mu mol g(-1) day(-1)), respectively, from dilute solution ([Cu] = 5.9 mu g L-1, [Pb] = 2.8 mu g L-1). Treatment of the cloth with aqueous NaOH did not improve the capacities for Pb(II) and Cu(II). (C) 1997 John Wiley & Sons, Inc. [References: 33]
机译：通过在甲醇羟胺中的反应，由聚丙烯腈前体制备机织聚丙烯酰胺肟布。制备是可控和可再现的，并且关于转化时间，NH 2 OH的浓度优化了反应条件。 HCl，并在温度下转化。所生产的布分别具有71.2和450 mg g（-1）（1.12和2.17 mmol g（-1））的Cu（II）和Pb（II）容量，并具有适合严格使用的足够的物理性能。 Pb（II）和Cu（II）的吸附曲线与螯合离子交换树脂和含the胺肟基团的纤维的吸附曲线相似。发现布料吸收金属的速率取决于转化为a肟基的表面积百分比，所测试金属的浓度和类型以及暴露时间。通过两部分吸附机理解释了增加a胺肟基含量的布对Pb（II）和Cu（II）的异常吸附动力学。观察到Cu（II）和Pb（II）的分布系数分别为3.5 x 10（6）和1.5 x 10（6），Cu（II）和Pb（II）的平均吸收率分别为600和200 mu gg（-1）天（-1）（分别来自稀溶液（[Cu] = 5.9μg L-1，[Pb] = 2.8）的9.4（0.96 mol mol g（-1）day（-1）））克L-1）。用NaOH水溶液处理布并不能提高Pb（II）和Cu（II）的容量。 （C）1997 John Wiley＆Sons，Inc. [参考：33]

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