Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
Carbohydr Polym. 2018 Jun 15;190:12-22. doi: 10.1016/j.carbpol.2018.02.032. Epub 2018 Feb 18.
A hydrogel (wheat straw cellulose-g-poly (acrylic acid)/poly (vinyl alcohol) (WSC-g-PAA/PVA)) was prepared and applied firstly as adsorbent for Cu(II) ions recovery and secondly as a template for in situ preparation of Cu nanoparticles. The adsorption performance of the hydrogel towards Cu(II) ions removal was investigated, indicating the adsorption capacity was 142.7 mg/g. The copper nanoparticles embodied in hydrogel were analyzed and confirmed by SEM with EDS, TEM, XRD and AFM. The reductive degradation of chloramphenicol (CAP) by WSC-g-PAA/PVA-Cu nanocomposite as catalyst with NaBH was optimized through response surface methodology. The effect of three variables (temperature, the amount of nanocomposite, the amount of NaBH) was investigated using the Box-Behnken design. The optimization conditions of three factors were obtained as 0.03 g WSC-g-PAA/PVA-Cu with 0.03 g NaBH at 20 °C and the obtained reduction rate of CAP was 90.59%. Activation energy was 21.41 kJ mol for the reduction reaction.
一种水凝胶（小麦秸秆纤维素-g-聚（丙烯酸）/聚（聚乙烯醇）（WSC-g-PAA/PVA））被首次制备并用作吸附剂以回收 Cu(II)离子，其次用作原位制备 Cu 纳米粒子的模板。研究了水凝胶对 Cu(II)离子去除的吸附性能，表明吸附容量为 142.7mg/g。通过 SEM 与 EDS、TEM、XRD 和 AFM 对嵌入水凝胶中的铜纳米粒子进行了分析和确认。以 NaBH 为还原剂，WSC-g-PAA/PVA-Cu 纳米复合材料作为催化剂优化了氯霉素（CAP）的还原降解，通过响应面法考察了三个变量（温度、纳米复合材料用量、NaBH 用量）的影响。通过 Box-Behnken 设计获得了三个因素的优化条件，即 0.03g WSC-g-PAA/PVA-Cu 和 0.03g NaBH 在 20°C 下，获得的 CAP 还原率为 90.59%。还原反应的活化能为 21.41kJ/mol。
