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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Removal of copper(II) using chitin/chitosan nano-hydroxyapatite composite
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Removal of copper(II) using chitin/chitosan nano-hydroxyapatite composite

机译：几丁质/壳聚糖纳米羟基磷灰石复合材料去除铜（II）

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摘要

Polymeric composites made up of nano-hydroxyapatite (n-HAp) with chitin and chitosan have been prepared and studied for the removal of Cu(II) ions from the aqueous solution. The sorption capacity (SC) of n-HAp, n-HAp/chitin (n-HApC) composite and n-HAp/chitosan (n-HApCs) composite were found to be 4.7, 5.4 and 6.2 mg/g respectively with a minimum contact time of 30 min. Batch adsorption studies were conducted to optimize various equilibrating conditions like contact time, pH and selectivity of metal ion. The sorbents were characterized by FTIR, TEM, XRD and SEM with EDAX analysis. The sorption process was explained with Freundlich and Langmuir isotherms respectively. Thermodynamic parameters such as Δ G°, Δ H° and Δ S° were calculated to understand the nature of sorption. A suitable mechanism for copper sorption was established and the selectivity of the metal ions for the composites was identified.
机译：制备了由纳米羟基磷灰石（n-HAp）与几丁质和壳聚糖组成的聚合物复合材料，并研究了从水溶液中去除Cu（II）离子的方法。发现n-HAp，n-HAp /几丁质（n-HApC）复合材料和n-HAp /壳聚糖（n-HApCs）复合材料的吸附容量（SC）分别为4.7、5.4和6.2 mg / g，最小值接触时间为30分钟。进行了批量吸附研究，以优化各种平衡条件，例如接触时间，pH和金属离子的选择性。通过FTIR，TEM，XRD和SEM以及EDAX分析对吸附剂进行表征。吸附过程分别用Freundlich和Langmuir等温线解释。计算了诸如ΔG°，ΔH°和ΔS°的热力学参数，以了解吸附的性质。建立了合适的铜吸附机理，并确定了金属离子对复合材料的选择性。

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