超支化聚酰胺接枝壳聚糖的制备及其对重金属和染料吸附的光谱分析

以戊二醛（GLA）为交联剂，将超支化聚酰胺（PAMAM）与壳聚糖（CS）相交联，制备出新型的超支化聚酰胺接枝壳聚糖（CS-PAMAM）吸附剂。通过扫描电子显微镜、红外光谱对改性吸附剂进行形貌和结构表征。结合火焰原子吸收光谱法（FASS）和紫外分光光度法（UV-Vis）研究其对孔雀石绿（MG）、日落黄（SY）和Cu(Ⅱ)的吸附性能。讨论了实验条件对吸附效率的影响，优化了实验操作参数（pH值分别为7.0，2.0和6.0；吸附时间分别为60，60和30 min）。在最佳条件下，其对孔雀石绿（MG）、日落黄（SY）和Cu(Ⅱ)最大吸附容量分别为515.30，201.79和80.00 mg·g-1，相比目前的文献报道，具有一定的优势。吸附基本符合Langmuir方程。

Synthesis of Hyperbranched Polyamidoamine (PAMAM) Grafted Chitosan and Its Adsorption for Heavy Metal and Dyes Studied with Spectroscopy

A new type of hyperbranched polyamide grafted chitosan (CS-PAMAM) adsorbent was synthesized using glutaraldehyde (GLA) as the crosslinker. The adsorbent wascharacterized with Field Emission Scanning Electron Microscope and Fourier Transform Infrared. Combined with flame atomic absorption spectroscopy (FAAS) and UV-Vis spectrophotometry, the adsorption of Malachite green (MG), Sunset yellow (SY) and Cu(Ⅱ) by adsorbent were investigated. Experimental conditions affecting the adsorption percentage were discussed and the experimental operation parameters were optimized (pH value were 7.0，2.0 and 6.0, respectively; adsorption time were 60，60 and 30 min, respectively). Under the optimal condition, the maximum adsorption capacity of MG, SY and Cu(Ⅱ) on CS-PAMAM was found to be 515.30, 201.79 and 80.00 mg·g-1, respectively. The advantages are obvious. The adsorption process for MG, SY and Cu(Ⅱ) obeyed Langmuir isother mequation.