The initial characteristics of Romanian fly ash from the CET II Holboca power plant show the feasibility of its application for the production of a new material with applicability in environmental decontamination. The material obtained was characterized using standard techniques: scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), instrumental neutron activation analysis (INAA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), the Brunauer–Emmett–Teller (BET) surface area, and thermogravimetric differential thermal analysis (TG-DTA). The adsorption capacity of the obtained material was evaluated in batch systems with different values of the initial Cu(II) ion concentration, pH, adsorbent dose, and contact time in order to optimize the adsorption process. According to the experimental data presented in this study, the adsorbent synthesized has a high adsorption capacity for copper ions (q_max = 27.32–58.48 mg/g). The alkali treatment of fly ash with NaOH improved the adsorption capacity of the obtained material compared to that of the untreated fly ash. Based on the kinetics results, the adsorption of copper ions onto synthesized material indicated the chemisorption mechanism. Notably, fly ash can be considered an important beginning in obtaining new materials with applicability to wastewater treatment.

中文翻译：

---

改性粉煤灰去除水中铜离子的吸附性能。

来自CET II Holboca电厂的罗马尼亚粉煤灰的初始特性表明，其可用于生产适用于环境净化的新材料的可行性。使用标准技术对获得的材料进行表征：扫描电子显微镜（SEM），能量色散X射线分析（EDX），仪器中子活化分析（INAA），X射线衍射（XRD），傅里叶变换红外光谱（FTIR）， Brunauer-Emmett-Teller（BET）表面积和热重差热分析（​​TG-DTA）。在批处理系统中，使用初始Cu（II）离子浓度，pH，吸附剂剂量和接触时间的不同值来评​​估获得的材料的吸附能力，以优化吸附过程。_最大值= 27.32–58.48 mg / g）。与未处理的粉煤灰相比，用NaOH进行粉煤灰的碱处理提高了所得材料的吸附能力。根据动力学结果，铜离子在合成材料上的吸附表明了化学吸附机理。值得注意的是，粉煤灰被认为是获得适用于废水处理的新材料的重要开端。