硅掺杂二氧化钛交联壳聚糖的合成及对水中Cu2+的吸附研究
Preparation of Si Doped TiO2 Cross-Linked Chitosan and Its Adsorption of Cu2+ from Aqueous Solution

将壳聚糖与硅掺杂二氧化钛进行共混，在弱碱性条件下加入戊二醛制的硅掺杂二氧化钛交联壳聚糖。用红外光谱(FTIR)对硅掺杂二氧化钛交联壳聚糖进行表征，研究了pH值、Cu²⁺初始浓度、吸附剂投加量对Cu²⁺吸附的影响，并利用Langmuir和Freundilich模型对等温吸附进行拟合。实验结果表明最佳吸附pH = 5，对Cu²⁺浓度50 mg/L的水溶液在30℃下最大Cu²⁺去除率可达96.5%；吸附符合Langmuir和Freundlich模型，最大吸附量为119.05 mg/g。

In the condition of alkalescence, the Si doped TiO₂ cross-linked chitosan was prepared by mixing glutaraldehyde, silicon doped titanium dioxide and cross-linking chitosan. Infared spectra of chitosan before and after modification shows that silicon doped titanium dioxide