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首页> 外文期刊>International Journal of Photochemistry and Photobiology >Comparison of the Uptake of Cadmium Ion on Chitosan and Chitosan/2,7 - Naphthalenediol Nanocomposite
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Comparison of the Uptake of Cadmium Ion on Chitosan and Chitosan/2,7 - Naphthalenediol Nanocomposite

机译：壳聚糖和壳聚糖/ 2,7 - 萘二醇纳米复合材料对镉离子摄取的比较

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摘要

Risk to human health arising from intake of heavy metals in foods and water is of great concern, one of the major application of chitosan and its derivative is its ability to chelate strongly metal ions. This adsorption capacity could be increased by crosslinking or forming its nanocomposite. In this research study, chitosan/2,7 - naphthalenediol nanocomposite was formed, the nanocomposite was characterized using FTIR spectrophotometer and UV/Visible spectrophotometer. The adsorption of cadmium ion by the nanocomposite and chitosan alone was studied for comparison using CdCl_2 solution containing Cd (II) ions. Amount of cadmium ion adsorb by each of them was studied at different time interval and evaluated using atomic absorption spectrophotometer (AAS). Results showed that chitosan/2,7 - naphthalenediol nanocomposite would adsorb maximum Cd~(2+) concentration of 0.017 mg/g at 20 minutes stirring time, while chitosan alone would adsorb maximum Cd~(2+) concentration of 0.016 mg/g at 10 minutes stirring time. It is therefore concluded from this study that both the chitosan and the nanocomposite have demonstrated almost the same degree of efficiency towards the removal of Cd~(2+) ion from aqueous medium and therefore both can be used in the treatment or removal of heavy metal ions from industrial effluents and other waste water.
机译：从食物和水中摄入重金属的人类健康风险是非常关注的，壳聚糖的主要应用之一是其螯合强金属离子的能力。通过交联或形成其纳米复合材料可以增加这种吸附能力。在该研究中，形成壳聚糖/ 2,7 - 萘二醇纳米复合材料，使用FTIR分光光度计和UV /可见分光光度计表征纳米复合材料。通过纳米复合材料和壳聚糖吸附镉离子的吸附，用于使用含CD（II）离子的CDCl_2溶液进行比较。在不同的时间间隔中研究了它们中的每一个的镉离子吸附量，并使用原子吸收分光光度计（AAS）评估。结果表明，壳聚糖/ 2,7 - 萘二硫醇纳米复合材料在搅拌时间20分钟内吸附最大CD〜（2+）浓度为0.017mg / g，而壳聚糖仅吸收最大CD〜（2+）浓度为0.016 mg / g在搅拌时间10分钟。因此，从该研究得出结论，壳聚糖和纳米复合材料已经表现出几乎相同的效率朝向水性介质去除CD〜（2+）离子，因此两者都可以用于处理或去除重金属来自工业污水和其他废水的离子。

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