Recovery of gold from electronic waste by the synthesis of Pinus Brutia tannin polymer

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED Reactive & Functional Polymers Pub Date : 2024-06-07 DOI:10.1016/j.reactfunctpolym.2024.105973

Tayfun Yalın , Engin Deniz Parlar , Mustafa Can

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Abstract

Electrical and electronic waste (e-waste) is one of the most common waste problems today and contains many recyclable materials such as gold and palladium. In this study, an adsorption material was prepared by reacting tannin from Pinus Brutia bark with formaldehyde to recover gold from e-waste. The produced Pinus Brutia tannin (PBTR) polymer was characterized using TGA, BET, and FTIR. The adsorption efficiency was investigated using solutions containing gold ions with different pH values, adsorbent masses, initial concentrations, times, and temperatures. The results of these experiments were used to perform adsorption isotherm, kinetics, and thermodynamics calculations. The pseudo-second-order kinetic equation and the Langmuir isothermal equation were found to fit the experimental data best. The Au(III) ion saturation capacity of the PBTR particle monolayer was calculated to be 1771.73 mg/g at 328 K using the Langmuir isotherm. XRD and XPS analyses showed that most of the Au(III) ions were reduced to metallic gold after adsorption on the surface of the PBTR particles. Observations show that the adsorbent effectively removes Au(III) from the leaching solution generated by e-waste.

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通过合成 Pinus Brutia 单宁聚合物从电子废物中回收黄金

电子电气废物（e-waste）是当今最常见的废物问题之一，其中含有许多可回收材料，如金和钯。在这项研究中，我们通过使 Pinus Brutia 树皮中的单宁酸与甲醛反应制备了一种吸附材料，用于从电子垃圾中回收金。利用 TGA、BET 和傅立叶变换红外光谱对制备出的松柏单宁（PBTR）聚合物进行了表征。使用含有金离子的溶液，在不同的 pH 值、吸附剂质量、初始浓度、时间和温度下，对吸附效率进行了研究。实验结果用于吸附等温线、动力学和热力学计算。结果发现，伪二阶动力学方程和朗缪尔等温方程最适合实验数据。利用 Langmuir 等温线计算出 328 K 时 PBTR 粒子单层的金（III）离子饱和容量为 1771.73 mg/g。XRD 和 XPS 分析表明，大部分 Au（III）离子在 PBTR 粒子表面吸附后被还原成金属金。观察结果表明，该吸附剂能有效去除电子垃圾浸出液中的金（III）。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.