桉树遗态结构HAP/C复合材料对水中Zn(Ⅱ)的吸附研究

Study on the Adsorption of Zn(Ⅱ) in Aqueous Solution by the Porous Biomorph-Genetic HAP/C Composites with Eucalyptus Templates

通过遗态转化工艺制备桉树遗态结构HAP/C复合材料(PBGC-HAP/C),并将该材料用于废水中Zn(Ⅱ)的吸附净化,探讨溶液pH、吸附剂投加量、吸附时间和温度等影响因素对吸附效能的影响,并讨论吸附动力学和热力学特性,通过SEM、XRD和FT-IR分析手段对吸附前后PBGC-HAP/C材料进行表征,揭示吸附机理。结果表明,对50m L的Zn(Ⅱ)模拟废水,pH为5适宜吸附高效进行,吸附剂适宜投加量为0.5 g;准2级动力学模型和Freundlich等温模型可以很好地用来描述吸附Zn(Ⅱ)的过程,吸附过程以化学吸附为主,物理吸附为辅,同时还存在络合作用,材料中部分Ca位置被Zn所替代。

A porous biomorph-genetic composite of Hydroxyapatite/Carbon was prepared morph-genetic transformation technology, and the composite was applied in Zn（II） removal in aqueous solution. Effects of initial pH, adsorbent dosage, adsorption time and temperature on adsorption efficiency were researched, and characteristics of the kinetic and thermodynamic were discussed. In order to reveal the adsorption mechanism, the PBGC HAP/C were characterized by SEM, XRD and FT-IR before and aider the adsorption. The results showed that, the optimal pH value was 5.0, the optimum adsorbent dose was 0.5 g for 50 mL Zn 01） simulated wastewater, Zn （II） adsorption process conforms to the pseudo second-order rate model and the Freundlich isotherm model. In the process of adsorption, Chemical adsorption was the predominant and the physical adsorption was auxiliary, and complexation also existed, Ca positions were partially replaced by Zn in the PBG-C HAP/C.