Gold recovery through synergetic adsorption and reduction using acid–base additive-reinforced tubular carbon nanofibers

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL AIChE Journal Pub Date : 2024-08-27 DOI:10.1002/aic.18581

Mudasir Ahmad, Menier Al-Anazi, Muhammad Rizwan Tariq, Idrees Khan, Baoling Zhang

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Abstract

In response to the increasing demand for gold in electronic manufacturing, this study addresses the urgent need for gold recycling from electronic waste (E-waste) to ensure the environment and energy safety. This study focuses on the preparation of the tubular carbon nanofibers (TCNFs) integrating NH₄⁺ and SO₃⁻ groups into TCNF-SO₃⁻-NH₄⁺, which exhibited remarkable gold adsorption capacity (2003.25 ± 0.23 mg/g) and selectivity (K_d; 41.7 × 10³ mL/g) at lower pH. TCNF-SO₃⁻-NH₄⁺ achieved a 99.77% gold adsorption efficiency under lower pH conditions (pH = 1) from E-waste. The adsorption capacity reached 3.54 ± 0.11 mg/g at an initial concentration of 0.85 mg/L. The results highlight the efficacy of TCNF-SO₃⁻-NH₄⁺ for extracting gold and other precious metal ions from E-waste, presenting a promising solution for clean energy and environmental protection.

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利用酸碱添加剂增强管状纳米碳纤维协同吸附和还原回收黄金

随着电子制造业对金的需求不断增加，本研究针对从电子废弃物（E-waste）中回收金以确保环境和能源安全的迫切需求进行了研究。本研究的重点是将 NH4+ 和 SO3- 基团整合到 TCNF-SO3--NH4+ 中的管状碳纳米纤维（TCNFs）的制备。在较低的 pH 值下，TCNF-SO3--NH4+ 具有显著的金吸附能力（2003.25 ± 0.23 mg/g）和选择性（Kd；41.7 × 103 mL/g）。在较低的 pH 值条件下（pH = 1），TCNF-SO3--NH4+ 对电子垃圾中金的吸附效率达到了 99.77%。在初始浓度为 0.85 mg/L 时，吸附容量达到 3.54 ± 0.11 mg/g。研究结果表明，TCNF-SO3--NH4+ 能有效地从电子垃圾中提取金和其他贵金属离子，为清洁能源和环境保护提供了一种前景广阔的解决方案。

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.