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利用遗态转化工艺制备获得桉树遗态结构HAP/C复合材料(PBGC-HAP/C),将其用于含Cd(Ⅱ)模拟废水的吸附净化处理,研究了p H、初始含量、投加量、吸附剂粒径和吸附剂种类对Cd(Ⅱ)吸附的影响,并且进行了材料吸附前后进行X射线衍射仪、傅里叶变换红外光谱仪表征和吸附机理探讨。结果表明,对50 m L含Cd(Ⅱ)模拟废水,当pH为5、初始Cd(Ⅱ)质量浓度为5 mg/L、PBGC-HAP/C投加量为0.1 g时,吸附平衡时间为120 min,去除率可达97.88%。Langmuir等温模型和准2级动力学模型更适合描述该吸附过程;材料表面Cd~(2+)取代了部分钙离子位置,表面基团与Cd~(2+)发生络合反应,吸附过程主要以单分子层化学吸附为主,该反应为吸热反应,升高温度有利于吸附进行。
The HAP / C composites (PBGC-HAP / C) of eucalyptus left-hander structure were prepared by the process of conversion of hedges, and used to purify the simulated wastewater containing Cd (II). The effects of p H, initial concentration, Amount of adsorbent and the type of adsorbent on the adsorption of Cd (Ⅱ) were investigated. X-ray diffractometry (FTIR), Fourier transform infrared spectroscopy (FTIR) and adsorption mechanism were discussed before and after the adsorption. The results showed that when the pH was 5, the initial concentration of Cd (Ⅱ) was 5 mg / L and the dosage of PBGC-HAP / C was 0.1 g, the adsorption equilibrium time for 50 m L Cd (Ⅱ) 120 min, removal rate up to 97.88%. Langmuir isotherm model and quasi-second-order kinetic model are more suitable for describing the adsorption process. Cd 2+ can replace part of calcium ion and the surface groups react with Cd 2+, Monolayer chemisorption, the reaction is endothermic reaction, the increase of temperature is conducive to adsorption.