A wheat straw cellulose-based hydrogel for Cu (II) removal and preparation copper nanocomposite for reductive degradation of chloramphenicol

作者：Ding, Jianzi; Li, Qian^*; Xu, Xing; Zhang, Xiaojin; Su, Yuan; Yue, Qinyan; Gao, Baoyu

来源：Carbohydrate Polymers, 2018, 190: 12-22.

DOI：10.1016/j.carbpol.2018.02.032

• Wheat straw hydrogel
• WSC-g PAA/PVA-Cu nanocomposite
• Chloramphenicol
• Response surface methodology

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 NaBH4 was optimized through response surface methodology. The effect of three variables (temperature, the amount of nanocomposite, the amount of NaBH4) 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 NaBH4 at 20 degrees C and the obtained reduction rate of CAP was 90.59%. Activation energy was 21.41 kJ mol(-1) for the reduction reaction.

• 出版日期2018-6-15
• 单位山东大学; 山东财经大学