Al Anazi Majed, Abdulazeez Ismail, Al Hamouz Othman Charles S
Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
Polymers (Basel). 2022 Jun 18;14(12):2486. doi: 10.3390/polym14122486.
A novel cross-linked Copolymer () was synthesized by the polycondensation reaction of 3,6-Diaminocarbazole and piperazine with -formaldehyde as a cross-linker. The Copolymer was fully characterized by solid C-NMR and FT-IR. The thermal stability of was investigated by TGA and showed that the Copolymer was stable up to 300 °C. The synthesized polyamine was tested for the removal of iron (), lead (), and copper () ions from aqueous and industrial wastewater solutions. The effect of pH, concentration and time on the adsorption of iron (), lead (), and copper () ions was investigated. The adsorption of the studied ions from aqueous solutions onto the polymer occurs following the Freundlich isotherm and pseudo-second-order kinetic models. The intraparticle diffusion model showed that the adsorption mechanism is controlled by film diffusion. The regeneration of showed practical reusability with a loss in capacity of 2-5% in the case of and ions. The molecular simulation investigations revealed similarities between experimental and theoretical calculations. Industrial wastewater treatment revealed the excellent capabilities and design of to be a potential adsorbent for the removal of heavy metal ions.
通过3,6 - 二氨基咔唑和哌嗪与作为交联剂的甲醛的缩聚反应合成了一种新型交联共聚物（）。通过固体碳 - 氮核磁共振（C - NMR）和傅里叶变换红外光谱（FT - IR）对该共聚物进行了全面表征。通过热重分析（TGA）研究了该共聚物的热稳定性，结果表明该共聚物在300℃以下是稳定的。对合成的多胺进行了测试，以研究其从水溶液和工业废水溶液中去除铁（）、铅（）和铜（）离子的能力。研究了pH值、浓度和时间对铁（）、铅（）和铜（）离子吸附的影响。所研究的离子从水溶液吸附到该聚合物上遵循弗伦德里希等温线和伪二级动力学模型。颗粒内扩散模型表明吸附机制受膜扩散控制。该共聚物的再生显示出实际的可重复使用性，对于铁（）和铅（）离子，容量损失为2 - 5%。分子模拟研究揭示了实验和理论计算之间的相似性。工业废水处理表明该共聚物具有出色的性能，有望成为一种用于去除重金属离子的潜在吸附剂。
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