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首页> 外文期刊>Journal of Applied Polymer Science >Preparation of crosslinked carboxymethylated chitin derivatives by irradiation and their sorption behavior for copper(II) ions
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Preparation of crosslinked carboxymethylated chitin derivatives by irradiation and their sorption behavior for copper(II) ions

机译：辐照交联羧甲基化几丁质衍生物的制备及其对铜离子的吸附行为

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摘要

To obtain highly efficient adsorbents that were insoluble in acidic and basic aqueous solutions, we synthesized new types of crosslinked chitin derivatives (carboxymethylchitin and carboxymethylchitosan) with ionizing radiation, and we investigated the sorption of Cu(II) ions onto these crosslinked chitin derivatives. Sorption kinetic studies indicated the rapid removal of copper(II) ions from the aqueous solutions. Also, isothermal sorption data revealed that Cu(II) was removed by these crosslinked carboxymethylated chitin derivatives with high efficiency. Sorption isothermal data were interpreted well by the Langmuir equation. The uptake of Cu(II) ions was 161 mg/g on crosslinked carboxymethylchitin and 172 mg/g on crosslinked carboxymethylchitosan at pH 5.5. A low pH was favorable for Cu(II) desorption. The Cu(II) ions were desorbed from the crosslinked matrix rapidly and completely after a treatment in a diluted HCl solution, and at the same time, the adsorbents were regenerated to be used again to adsorb heavy metal ions. (C) 2003 Wiley Periodicals, Inc. [References: 20]
机译：为了获得不溶于酸性和碱性水溶液的高效吸附剂，我们用电离辐射合成了新型的交联几丁质衍生物（羧甲基壳多糖和羧甲基壳聚糖），并研究了Cu（II）离子在这些交联的几丁质衍生物上的吸附。吸附动力学研究表明已从水溶液中快速去除了铜离子。同样，等温吸附数据表明，这些交联的羧甲基化甲壳质衍生物可高效去除Cu（II）。 Langmuir方程很好地解释了吸附等温数据。在pH 5.5时，交联的羧甲基壳多糖对Cu（II）离子的吸收为161 mg / g，而交联的羧甲基壳聚糖的吸收为172 mg / g。低pH值有利于Cu（II）的解吸。在稀释的HCl溶液中处理后，Cu（II）离子从交联的基质中快速完全解吸，同时，吸附剂再生，再次用于吸附重金属离子。 （C）2003 Wiley Periodicals，Inc. [参考：20]

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