Visa Maria, Enesca Alexandru
Product Design, Mechatronics and Environmental Department, Transilvania University of Brasov, Eroilor 29 Street, 35000 Brasov, Romania.
Materials (Basel). 2022 Dec 27;16(1):239. doi: 10.3390/ma16010239.
This work shows the development and characterization of two zeolite structures by recycling PV glass and coal fly ash for the removal of cadmium, copper, and lead from synthetic solutions containing one or three cations. The materials were characterized in terms of crystalline structure (XRD), morphology (SEM, AFM), and specific surface. For increasing the heavy-metals removal efficiency, the adsorption conditions, such as substrate dosage, preliminary concentration, and contact time, were optimized. The pseudo-second-order kinetic model adsorption kinetics fit well to describe the activity of the zeolites ZFAGPV-A and ZFAGPV-S. The zeolite adsorption equilibrium data were expressed using Langmuir and Freundlich models. The highest adsorption capacities of the ZFAGPV-A zeolite are q = 55.56 mg/g, q = 60.11 mg/g, q = 175.44 mg/g, and of ZFAGPV-S, are q = 33.45 mg/g, q = 54.95 mg/g, q = 158.73 mg/g, respectively. This study demonstrated a new opportunity for waste recycling for applications in removing toxic heavy metals from wastewater.
这项工作展示了通过回收光伏玻璃和粉煤灰来制备两种沸石结构，并对其进行表征，用于从含有一种或三种阳离子的合成溶液中去除镉、铜和铅。通过晶体结构（XRD）、形态（SEM、AFM）和比表面积对材料进行了表征。为了提高重金属去除效率，对吸附条件进行了优化，如底物用量、初始浓度和接触时间。准二级动力学模型能很好地拟合描述沸石ZFAGPV - A和ZFAGPV - S的活性。用Langmuir和Freundlich模型表示沸石吸附平衡数据。ZFAGPV - A沸石对镉、铜、铅的最高吸附容量分别为q = 55.56 mg/g、q = 60.11 mg/g、q = 175.44 mg/g，ZFAGPV - S沸石对镉、铜、铅的最高吸附容量分别为q = 33.45 mg/g、q = 54.95 mg/g、q = 158.73 mg/g。这项研究为废物回收利用以从废水中去除有毒重金属的应用提供了新的机会。
