Wu Limei, Liu Jingwen, Liu Yan, Huang Ritong, Tang Ning, Wang Xiaolong, Hu Ling
School of Materials Science and Engineering, Shenyang Jianzhu University Shenyang 110168 China
School of Mechanical Engineering, Shenyang Jianzhu University Shenyang 110168 China.
RSC Adv. 2021 Oct 12;11(53):33399-33407. doi: 10.1039/d1ra06318a. eCollection 2021 Oct 8.
An environmentally functional material for the efficient removal of anionic pollutants in water was prepared for our study. Montmorillonite (M) was modified by hydrochloric acid (HCl) and cetyltrimethylammonium bromide (CTAB). FeO was grown to prepare modified FeO/montmorillonite (AC FeO-Mt) composites. The number of hydroxyl sites on the surface of Mt and the surface tension were increased by HCl and CTAB modification, respectively, which enabled higher FeO surface growth, promoting the multi-directional crystallisation of FeO and improving reactivity. The XRD results show that FeO grows on the surface of Mt and has good crystallinity and high purity, meaning that AC FeO-Mt is more reactive than FeO. When AC FeO-Mt is used to remove anionic pollutants in water, the removal effect under the synergistic action of adsorption-redox is significantly improved, and the maximum removable quantities of Cr(vi) and 2-4-dichlorophenol can reach 41.57 mg g and 239.33 mg g, respectively. AC FeO-Mt is a high efficiency and environmentally functional material with green environmental protection, which can be used in the field of sewage treatment.
本研究制备了一种用于高效去除水中阴离子污染物的环境功能材料。蒙脱石（M）用盐酸（HCl）和十六烷基三甲基溴化铵（CTAB）进行改性。生长FeO以制备改性FeO/蒙脱石（AC FeO-Mt）复合材料。HCl和CTAB改性分别增加了Mt表面的羟基位点数量和表面张力，这使得FeO在表面有更高的生长，促进了FeO的多方向结晶并提高了反应活性。XRD结果表明，FeO生长在Mt表面，具有良好的结晶度和高纯度，这意味着AC FeO-Mt比FeO更具反应活性。当AC FeO-Mt用于去除水中的阴离子污染物时，吸附-氧化还原协同作用下的去除效果显著提高，Cr(Ⅵ)和2,4-二氯苯酚的最大去除量分别可达41.57 mg/g和239.33 mg/g。AC FeO-Mt是一种高效且具有绿色环保特性的环境功能材料，可用于污水处理领域。
