Selective sorption of Fe(III) using modified forms of chitosan beads
Selective sorption of Fe(III) using modified forms of chitosan beads
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DOI：
10.1002/app.35204
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发表时间：
2012-05-05
影响因子：
3
通讯作者：
Meenakshi, S.
中科院分区：
文献类型：
--
作者：
Gandhi, Muniyappan Rajiv;Kousalya, G. N.;Meenakshi, S.
制备改性壳聚糖珠 (CB) 并用于去除水溶液中的 Fe(III) 离子。改性炭黑相对于原始炭黑的优势已得到探索。改性炭黑（即质子化炭黑、羧化炭黑和接枝炭黑）的吸附容量（SC）分别为 3533、3905 和 4203 mg kg-1，而原始炭黑的 SC 仅为 2913 mg kg-1。进行批量吸附研究以优化各种平衡条件，如接触时间、pH 值和离子。通过 FTIR、WDXRF 和 SEM 以及 EDAX 分析对吸附剂进行了表征。吸附过程已用 Freundlich 和 Langmuir 等温线解释。计算热力学参数，例如 Delta G 度、Delta H 度和 Delta S 度，以了解吸附的性质。改性 CB 对 Fe(III) 的选择性比 Cu(II) 更高，而 Cu(II) 的选择性又高于 Cr(VI)。建立了一种合适的铁吸附到改性炭黑上的机制。 (C) 2011 年 Wiley 期刊公司。《应用高分子科学》杂志，2012 年
Modified chitosan beads (CB) were prepared and used for the removal of Fe(III) ions from aqueous solution. The advantages of modified CB than raw CB have been explored. The sorption capacity (SC) of the modified forms of CB namely, protonated CB, carboxylated CB, and grafted CB were found to be 3533, 3905, and 4203 mg kg-1, respectively, while the raw CB showed the SC of 2913 mg kg-1 only. Batch adsorption studies were conducted to optimize various equilibrating conditions like contact time, pH, and coions. The sorbents were characterized by FTIR, WDXRF, and SEM with EDAX analysis. The sorption process has been explained with Freundlich and Langmuir isotherms. Thermodynamic parameters such as Delta G degrees, Delta H degrees, and Delta S degrees were calculated to understand the nature of sorption. Modified CB are more selective for Fe(III) than Cu(II), which inturn higher than Cr(VI). A suitable mechanism for iron sorption onto modified CB was established. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012