Abstract
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 °C and the obtained reduction rate of CAP was 90.59%. Activation energy was 21.41 kJ mol−1 for the reduction reaction.
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