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High performance of phytic acid-functionalized spherical poly-phenylglycine particles for removal of heavy metal ions
Applied Surface Science ( IF 6.7 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.apsusc.2020.146206
Monaam Ben Ali , Fengyun Wang , Rabah Boukherroub , Mingzhu Xia

Abstract In the present work, a novel material consisting of phytic acid-functionalized poly-phenylglycine (PA-PPG) was successfully synthesized through radical polymerization and used for the removal of heavy metals ions from water. Microscopic images revealed the formation of homogenous particles in aggregated form. The chemical composition of the PA-PPG was examined using X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectroscopy. The influence of various experimental parameters such as solution pH, alkaline metals, and initial concentration of Cu, Pb, Cd ions on the removal efficiency of PA-PPG was assessed by using absorption atomic spectroscopy (AAS). The PA-PPG sample exhibited high maximum adsorption capacity of 90.5, 732.4, and 216 mg/g for Cu, Pb, and Cd ions, respectively. The PA-PPG demonstrated a pH-dependent adsorption with a maximum adsorption capacity achieved at pH 5.2. The Langmuir and Temkin models described well the adsorption isotherm data and a probable adsorption mechanism based on complexation and electrostatic attraction was proposed. Moreover, the developed PA-PPG can be reused for four cycles without any apparent loss of its adsorption capacity. The obtained results prove the efficiency of phytic acid, validate and promote the idea of using an active molecule to enhance the capacity of poly-phenylglycine for environmental remediation.

中文翻译:

高效去除重金属离子的植酸功能化球形聚苯基甘氨酸颗粒

摘要 在目前的工作中,通过自由基聚合成功合成了一种由植酸功能化聚苯基甘氨酸(PA-PPG)组成的新型材料,用于去除水中的重金属离子。显微图像揭示了以聚集形式形成的均质颗粒。使用 X 射线光电子能谱 (XPS) 和傅里叶变换红外 (FTIR) 光谱检查 PA-PPG 的化学成分。通过使用吸收原子光谱 (AAS) 评估了各种实验参数,如溶液 pH 值、碱金属和 Cu、Pb、Cd 离子的初始浓度对 PA-PPG 去除效率的影响。PA-PPG 样品对 Cu、Pb 和 Cd 离子的最大吸附容量分别为 90.5、732.4 和 216 mg/g。PA-PPG 表现出 pH 依赖性吸附,在 pH 5.2 时达到最大吸附容量。Langmuir 和 Temkin 模型很好地描述了吸附等温线数据,并提出了基于络合和静电引力的可能吸附机制。此外,开发的 PA-PPG 可以重复使用四个循环,而其吸附能力没有任何明显损失。所获得的结果证明了植酸的有效性,验证并促进了使用活性分子来增强聚苯基甘氨酸对环境修复能力的想法。开发的 PA-PPG 可以重复使用四个循环,其吸附能力没有任何明显损失。所获得的结果证明了植酸的有效性,验证并促进了使用活性分子来增强聚苯基甘氨酸对环境修复能力的想法。开发的 PA-PPG 可以重复使用四个循环,其吸附能力没有任何明显的损失。所获得的结果证明了植酸的有效性,验证并促进了使用活性分子来增强聚苯基甘氨酸对环境修复能力的想法。
更新日期:2020-07-01
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