CO2-Activated Adsorption: A New Approach to Dye Removal by Chitosan Hydrogel
CO2-Activated Adsorption: A New Approach to Dye Removal by Chitosan Hydrogel
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DOI：
10.1021/acsomega.8b01825
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发表时间：
2018-10-01
期刊：
影响因子：
4.1
通讯作者：
Shimoyama, Yusuke
中科院分区：
文献类型：
--
作者：
Le, Huy Q.;Sekiguchi, Yo;Shimoyama, Yusuke
本研究旨在开发一种新的CO2活化壳聚糖吸附技术。研究了利用二氧化碳形成壳聚糖功能基团对水溶液中的亮蓝FCF和刚果红的吸附作用。CO2活化的壳聚糖对染料的吸附速度明显快于纯水中的壳聚糖。CO2活化壳聚糖提高了对染料的吸附容量和去除效率。此外，在不同温度和染料初始浓度的水溶液中，CO2活化的壳聚糖上的染料吸附进行了研究。有趣的是，高温吸附提供了增强的吸附容量和去除效率的染料的氨基甲酸酯交联的壳聚糖与CO2。通过红外光谱、氨基比、zeta电位和热重分析对CO2活化壳聚糖进行了表征。这些表征可用于理解染料在CO2活化的壳聚糖上的独特吸附。本研究将为二氧化碳活化壳聚糖吸附染料废水提供一种有效的操作和清洁的工艺。
This study focuses on development of a new adsorption technique by CO2-activated chitosan. Carbon dioxide was utilized to form the functional chemical groups of chitosan on the adsorptions of anionic dyes, Brilliant Blue FCF and Congo Red, in the aqueous solution. CO2-activated chitosan results in the dye adsorption significantly faster than that of chitosan in pure water. The adsorption capacities and removal efficiencies of the dye are increased by CO2-activated chitosan. Furthermore, the dye adsorptions on CO2-activated chitosan were investigated at various temperatures and initial dye concentrations in the aqueous solution. Interestingly, the high temperature adsorption provides the enhancement of adsorption capacities and removal efficiencies of the dye by the carbamate cross-linking of chitosan with CO2. CO2-activated chitosan was further characterized by Fourier transform infrared spectra, amino group ratio, zeta potential, and thermal gravimetric analysis. These characterizations can be used for understanding the unique adsorption of the dye on CO2-activated chitosan. Carbon dioxide-activated chitosan in this work will provide an effective operation and a clean process of dye adsorption in wastewater treatment.