Department of Chemical Engineering, Hanbat National University, San 16-1, Deokmyeong-Dong, Yuseong-Gu, Daejeon 305-719, Republic of Korea.
Bioresour Technol. 2010 Mar;101(6):1800-6. doi: 10.1016/j.biortech.2009.10.051. Epub 2009 Dec 4.
The adsorption performance of chitosan (CS) hydrogel beads was investigated after multiwalled carbon nanotubes (MWCNTs) impregnation for the removal of congo red (CR) as an anionic dye. The study of the adsorption capacity of CS/CNT beads as a function of the CNT concentration indicated that 0.01% CNT impregnation was the most useful for enhancing the adsorption capacity. The sulfur (%) in the CS/CNT beads measured by energy dispersive X-ray (EDX) was 2.5 times higher than that of normal CS beads after CR adsorption. Equilibrium adsorption isotherm data of the CS/CNT beads exhibited better fit to the Langmuir isotherm model than to the Freundlich isotherm model, and the heterogeneity factor (n) value of the CS/CNT beads calculated from the Sips isotherm model was close to unity (0.98). The maximum adsorption capacity of CS/CNT beads obtained from the Langmuir model was 450.4 mg g(-1).
壳聚糖（CS）水凝胶珠经过多壁碳纳米管（MWCNTs）浸渍后，用于去除作为阴离子染料的刚果红（CR），研究了其吸附性能。研究了 CS/CNT 珠作为 CNT 浓度函数的吸附能力，结果表明，0.01% CNT 浸渍最有利于提高吸附能力。CS/CNT 珠在吸附 CR 后，通过能量色散 X 射线（EDX）测量的硫（%）含量比普通 CS 珠高 2.5 倍。CS/CNT 珠的平衡吸附等温线数据更符合朗缪尔等温线模型，而不是弗伦德利希等温线模型，并且从 Sips 等温线模型计算得出的 CS/CNT 珠的非均质性因子（n）值接近 1（0.98）。从朗缪尔模型得出的 CS/CNT 珠的最大吸附容量为 450.4 mg g(-1)。
