"Petru Poni" Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, 700487 Iasi, Romania.
Int J Mol Sci. 2023 Feb 23;24(5):4383. doi: 10.3390/ijms24054383.
Modified polysaccharides have been increasingly used as flocculants in wastewater treatment due to their non-toxicity, low price, biodegradability, etc. However, the pullulan derivatives are less used in wastewater purification processes. Therefore, this article presents some data regarding FeO and TiO particle removal from model suspensions by some pullulan derivatives with pendant quaternary ammonium salt groups, trimethylammonium propyl carbamate chloride (). The influence of the polymer ionic content, dose, and initial solution concentration as well as of the dispersion pH and composition (metal oxide content, salts, and kaolin) on the separation efficacy were considered. UV-Vis spectroscopy measurements have shown a very good removal efficacy of for the FeO particles (around 95% and more), irrespective of the polymer and suspension characteristics; a lower clarification of the TiO particles suspension (removal efficiency between 68% and 75%) was noticed. Both the zeta potential and the particle aggregates size measurements revealed the charge patch as the main mechanism which governs the metal oxide removal process. The surface morphology analysis/EDX data provided supplementary evidence regarding the separation process. A good removal efficiency (90%) of the pullulan derivatives/FeO flocs for the Bordeaux mixture particles from simulated wastewater was found.
由于无毒、价格低廉、可生物降解等特点，改性多糖越来越多地被用作废水处理中的絮凝剂。然而，普鲁兰衍生物在废水净化过程中的应用较少。因此，本文介绍了一些关于通过带有季铵盐基团的普鲁兰衍生物（）从模型悬浮液中去除 FeO 和 TiO 颗粒的数据。研究了聚合物离子含量、剂量、初始溶液浓度以及分散 pH 值和组成（金属氧化物含量、盐和高岭土）对分离效果的影响。紫外-可见光谱测量表明，对于 FeO 颗粒（约 95%及以上），具有非常好的去除效果，与聚合物和悬浮液特性无关；TiO 颗粒悬浮液的澄清度较低（去除效率在 68%至 75%之间）。zeta 电位和颗粒聚集体尺寸测量均表明，电荷斑是控制金属氧化物去除过程的主要机制。表面形貌分析/EDX 数据为分离过程提供了补充证据。还发现从模拟废水中去除 Bordeaux 混合物颗粒的普鲁兰衍生物/FeO 絮体的去除效率高达 90%。
