Danil de Namor Angela F, Alharthi Salman, Howlin Brendan, Al Hakawati Nawal
Laboratory of Thermochemistry, Department of Chemistry, University of Surrey Guildford Surrey GU2 7XH UK
Instituto Nacional de Tecnologia Industrial, Ministry of Production Argentina.
RSC Adv. 2020 Jan 16;10(6):3060-3071. doi: 10.1039/c9ra09911e.
A recyclable mercury(ii) selective dimer based on a calix[4]pyrrole derivative has been synthesised and characterised by mass and FT-IR spectrometry, Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX). Information regarding the ability of the dimer to interact with metal cations was obtained from FTIR and SEM-EDX analyses. A striking feature of micrographs of the loaded dimer is the change of morphology with the cation. Based on these results, optimal conditions for removing cations from water were assessed under different experimental conditions. Results obtained demonstrate that the removal process is fast. Capacity values and selectivity factors show that the dimer is selective for Hg(ii) in single and multiple component metal solutions relative to other cations. Single-ion transfer Gibbs energies from water to a solvent containing common functionalities to those of the dimer were used to assess the counter-ion effect on the removal process. Agreement is found between these data and energy calculations derived from molecular simulation studies. Studies on polluted water in the presence of normal water components in addition to toxic metal cations are reported. Further experimental work on wastewater from the mining industry is in progress.
一种基于杯[4]吡咯衍生物的可回收汞（II）选择性二聚体已被合成，并通过质谱、傅里叶变换红外光谱、扫描电子显微镜（SEM）和能量色散X射线（EDX）进行了表征。关于二聚体与金属阳离子相互作用能力的信息是通过傅里叶变换红外光谱和扫描电子显微镜-能量色散X射线分析获得的。负载二聚体的显微照片的一个显著特征是其形态随阳离子的变化而改变。基于这些结果，在不同实验条件下评估了从水中去除阳离子的最佳条件。获得的结果表明去除过程很快。容量值和选择性因子表明，在单组分和多组分金属溶液中，该二聚体相对于其他阳离子对汞（II）具有选择性。利用从水到含有与二聚体具有共同官能团的溶剂的单离子转移吉布斯自由能来评估抗衡离子对去除过程的影响。这些数据与分子模拟研究得出的能量计算结果一致。报告了在存在正常水成分以及有毒金属阳离子的情况下对污染水的研究。关于采矿业废水的进一步实验工作正在进行中。
