ABSTRACT Environmental remediation concerns about pollution and contamination removal from environmental media, such as soil, air, or surface water. Enormous efforts have been applied in metal removal from surface water. In this study, four novel heteroaromatic sulfur-containing polyamides 6a-d carry both types of aliphatic and aromatic species in their polymer backbones as selective adsorbents for Hg+2 metal ion from aqueous solution have been synthesized in considerable amounts. The polycondensation method at low temperature is used as a simple and low coast polymerization technique. This occurred by the interaction of the thiophene-based monomer 5 with different diacid chlorides of both types. Beforehand the polymerization, the structures of monomer 5 were confirmed by spectral and elemental analyses. Also, the structures of the new polymers were investigated by both spectral and elemental analysis; besides their solubility, GPC data, XRD diffraction patterns, thermal analysis, and FE-SEM micrographs. The synthesized polymers were freely soluble in polar protic solvents due to the presence of heteroaromatic sulfur functional groups. Furthermore, the analytical competition of the new polymers has been tested using inductively coupled plasma-optical emission spectrometry (ICP-OES) for its selective extraction across different metal ions. Polymer 6c was the most selective toward Hg+2 and considered as a highly selective adsorbent for Hg+2 environmental remediation among all derivatives and its adsorption detection and efficiency were also investigated. Polymer 6c showed the most effective adsorption quantity on its surface at pH = 1. Moreover, the calculated adsorption isotherm showed a typical isotherm to the Langmuir adsorption type. This showed that the adsorption capacity of polymer 6c for Hg+2 was 47.95 mg g−1. These novel polymers are serving as simple and inexpensive heavy metal ions adsorbent materials from drinking water and wastewater.

中文翻译：

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用于Hg+2环境修复的高选择性杂芳族含硫聚酰胺


摘要 环境修复关注环境介质（如土壤、空气或地表水）的污染和污染物去除。人们在从地表水中去除金属方面付出了巨大的努力。在这项研究中，四种新型杂芳族含硫聚酰胺6a-d在其聚合物主链中携带脂肪族和芳香族物质，作为水溶液中Hg+2金属离子的选择性吸附剂，已被大量合成。低温缩聚法是一种简单、低成本的聚合技术。这是通过基于噻吩的单体5与两种类型的不同二酰氯的相互作用而发生的。在聚合之前，通过光谱和元素分析确认了单体5的结构。此外，还通过光谱和元素分析研究了新聚合物的结构；除了溶解度之外，还包括 GPC 数据、XRD 衍射图、热分析和 FE-SEM 显微照片。由于杂芳族硫官能团的存在，合成的聚合物可易溶于极性质子溶剂。此外，还使用电感耦合等离子体发射光谱法 (ICP-OES) 测试了新型聚合物的分析竞争，以实现其对不同金属离子的选择性萃取。聚合物6c对Hg+2选择性最强，被认为是所有衍生物中Hg+2环境修复的高选择性吸附剂，并对其吸附检测和效率进行了研究。当pH = 1时，聚合物6c在其表面显示出最有效的吸附量。此外，计算的吸附等温线显示出典型的Langmuir吸附类型的等温线。 这表明聚合物6c对Hg+2的吸附容量为47.95 mg g−1。这些新型聚合物可作为简单且廉价的饮用水和废水中的重金属离子吸附材料。