Cumhuriyet University, Faculty of Science, Department of Chemistry, 58140 Sivas, Turkey.
Cumhuriyet University, Zara Vocational School, Department of Food Technology, 58140 Sivas, Turkey.
J Hazard Mater. 2017 Sep 15;338:437-446. doi: 10.1016/j.jhazmat.2017.05.059. Epub 2017 Jun 1.
In this study, a versatile polymeric material was synthesized by grafting Calcon Carboxylic Acid (CCA), which is known as a chelating agent for some metal ions, to polyacrylamide (PAA) structure. Thus, the adsorptive properties of inert PAA polymer were significantly improved owing to this procedure. The obtained new material, CCA-g-PAA, was characterized by point zero charge (PZC), FTIR, SEM, and UV-VIS-NIR analysis. The adsorption properties of new material were investigated comprehensively and experimental variables were optimized such as pH, temperature, time, and concentration. Experimental data were evaluated by using theoretical adsorption models. The maximum adsorption capacity of material was calculated as 0.079molkg by considering Langmuir equation. The constants calculated from Freundlich and DR model were found as 6.98 and 0.441, respectively. Adsorption kinetic was also explained with pseudo second order and intra particular diffusion models. Experimental studies were showed that adsorption was endothermic and occurred spontaneously. The developed material has important advantages such as reusability, cost-effective synthesis procedure, high adsorption capacity, and selectivity.
在这项研究中，通过将已知的一些金属离子螯合剂 Calcon 羧酸（CCA）接枝到聚丙烯酰胺（PAA）结构上，合成了一种多功能聚合物材料。因此，惰性 PAA 聚合物的吸附性能由于这一过程得到了显著提高。通过零点电荷（PZC）、FTIR、SEM 和 UV-VIS-NIR 分析对所得新材料 CCA-g-PAA 进行了表征。全面研究了新材料的吸附性能，并对 pH、温度、时间和浓度等实验变量进行了优化。通过使用理论吸附模型对实验数据进行了评估。通过考虑朗缪尔方程，计算出材料的最大吸附容量为 0.079molkg。从 Freundlich 和 DR 模型计算出的常数分别为 6.98 和 0.441。吸附动力学也用拟二级和内扩散模型进行了解释。实验研究表明，吸附是吸热的，并且是自发进行的。所开发的材料具有可重复使用、成本效益高的合成工艺、高吸附容量和选择性等重要优点。
