Citation: Yajun Jian, Duanrui Chen, Hengyan Zheng, Wanyao Wei, Lingxiang Gao, Weiqiang Zhang, Lingling Wei, Ziwei Gao. Gold Extraction with Strach: Green Specific Recovery of Gold from Electronic Scrap[J]. University Chemistry, ;2023, 38(4): 216-226. doi: 10.3866/PKU.DXHX202211081 shu

Gold Extraction with Strach: Green Specific Recovery of Gold from Electronic Scrap

Xi'an Key Laboratory of Organometallic Material Chemistry, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China

Received Date: 26 November 2022

In this study, we develop an innovative and comprehensive method for extracting Au from electronic scrap. Au recycling from electronic waste is a popular topic for chemistry students and the general public. To implement the latest scientific knowledge and methods, herein, Au recovery via the reaction of α-cyclodextrin with [AuBr₄]^- is used as the basic principle. The procedure used to recycle Au from electronic waste comprises four steps: dilute nitric acid is used to decrease the unwanted metal content of electronic waste (Au enrichment); Au is subjected to mild oxidation using a potassium bromide-acetic acid-nitric acid system (Au dissolution); α-cyclodextrin is reacted with [AuBr₄]^- (Au extraction); Au(III) is reduced to Au(0) using sodium metabisulfite, a non-toxic and non-metallic reducing agent (Au formation). The experiments involve multi-disciplinary principles, such as inorganic, supramolecular, and analytical chemistry concepts. Furthermore, they cover the basic operations of synthesis and analytical experiments including reaction monitoring, structural characterization, and purity analysis. The experimental results are conspicuous, the experiments are repeatable, and the purity of Au is above 90%. Moreover, the time required to perform the experiments ranges between 6 and 8 h. Therefore, the experiments are suitable for undergraduate comprehensive chemistry laboratory teaching. In addition, green chemistry concepts and experimental methods are incorporated as the reagents are environmentally friendly and safe to handle. This experiment demonstrates the critical role of chemistry in solving national economy problems and improving the livelihood of humankind. Through a thorough teaching approach comprising online and offline modules, this experiment cultivates the scientific thinking patterns and innate curiosity of students, improves the ability of undergraduate chemistry students to solve complex synthetic chemistry problems, and consolidates the knowledge of chemistry trainees.
- Innovative comprehensive experiments,
- α-cyclodextrin,
- Supramolecular recognition,
- Electronic waste,
- Green Au extraction
1. [1]
2. [2]
3. [3]
4. [4]
5. [5]
6. [6]
7. [7]
  Haruta, M.; Yamada, N.; Kobayashi, T.; Iijima, S. J. Catal. 1989, 115, 301.
8. [8]
9. [9]
  Syed, S. Hydrometallurgy 2012, 115-116, 30.
10. [10]
11. [11]
12. [12]
13. [13]
  Konyratbekova, S. S.; Baikonurova, A.; Akcil, A. Min. Proc. Ext. Met. Rev. 2015, 36 (3), 198.
14. [14]
  Zhang, Y.; Li, Q.; Liu, X.; Jiang, T. Miner. Eng. 2022, 180, 107511.
15. [15]
16. [16]
  Yue, C.; Sun, H.; Liu, W.; Guan, B.; Deng, X.; Zhang, X.; Yang, P. Angew. Chem. Int. Ed. 2017, 129 (32), 9331.
17. [17]
  Cram, D. J.; Cram, J. M. Science 1974, 183, 803.
18. [18]
  Liu, Z.; Frasconi, M.; Lei, J.; Brown, Z. J.; Zhu, Z.; Cao, D.; Lehl, J.; Liu, G.; Fahrenbach, A. C.; Botros, Y. Y.; et al. Nat. Commun. 2013, 4, 1855.
19. [19]
  Rao, B. V.; Jagadeshkumar, T.; Radha Menon, V. G. Fresenius Z. Anal. Chem. 1981, 309, 406.
1. [1]
  Zhaohu Li , Weidong Wang , Yuhao Liu , Mingzhe Han , Lingling Wei , Huan Jiao . Research on the Safety Management and Disposal of Chemical Laboratory Waste. University Chemistry, 2024, 39(10): 128-136. doi: 10.3866/PKU.DXHX202312090
2. [2]
  Shuyong Zhang , Yaxian Zhu , Wenqing Zhang , Yuzhi Wang , Jing Lu . Ideological and Political Design of Combustion Heat Measurement Experiment: Determination of Heat Value of Agricultural and Forestry Wastes. University Chemistry, 2024, 39(2): 1-6. doi: 10.3866/PKU.DXHX202303026
3. [3]
  Ling Zhang , Jing Kang . Turn Waste into Valuable: Preparation of High-Strength Water-Based Adhesives from Polymethylmethacrylate Wastes: a Comprehensive Chemical Experiments. University Chemistry, 2024, 39(2): 221-226. doi: 10.3866/PKU.DXHX202306075
4. [4]
  Shuting Zhuang , Lida Zhao . Teaching through Research: A Comprehensive Experiment on Carbon Quantum Dots from Microplastic Waste. University Chemistry, 2025, 40(10): 217-224. doi: 10.12461/PKU.DXHX202412010
5. [5]
  Minglei Sun , Zhong-Yong Yuan . Valorization strategies for electrodegradation of nitrogenous wastes in sewage. Acta Physico-Chimica Sinica, 2025, 41(9): 100108-0. doi: 10.1016/j.actphy.2025.100108
6. [6]
  Tao Cao , Fang Fang , Nianguang Li , Yinan Zhang , Qichen Zhan . Green Synthesis of p-Hydroxybenzonitrile Catalyzed by Spinach Extracts under Red-Light Irradiation: Research and Exploration of Innovative Experiments for Pharmacy Undergraduates. University Chemistry, 2024, 39(5): 63-69. doi: 10.3866/PKU.DXHX202309098
7. [7]
  Lina Liu , Xiaolan Wei , Jianqiang Hu . Exploration of Subject-Oriented Undergraduate Comprehensive Chemistry Experimental Teaching Based on the “STS Concept”: Taking the Experiment of Gold Nanoparticles as an Example. University Chemistry, 2024, 39(10): 337-343. doi: 10.12461/PKU.DXHX202405112
8. [8]
  Chunyang Bao , Ruoxuan Miao , Yuhan Ding , Qingfu Ban , Yusheng Qin , Jie Liu , Zhirong Xin . The Comprehensive Experiment Design of Preparation of Depolymerizable Thermosetting Polymers. University Chemistry, 2025, 40(4): 59-65. doi: 10.12461/PKU.DXHX202405087
9. [9]
  Jin Tong , Shuyan Yu . Crystal Engineering for Supramolecular Chirality. University Chemistry, 2024, 39(3): 86-93. doi: 10.3866/PKU.DXHX202308113
10. [10]
  Chunai Dai , Yongsheng Han , Luting Yan , Zhen Li , Yingze Cao . Preparation of Superhydrophobic Surfaces and Their Application in Oily Wastewater Treatment: Design of a Comprehensive Physical Chemistry Innovation Experiment. University Chemistry, 2024, 39(2): 34-40. doi: 10.3866/PKU.DXHX202307081
11. [11]
  Wenxu Liu , Feng Han , Boxuan Wang , Huayi Liu , Xiaobin Gu , Xin Zhang , Yao Liu . Comprehensive Chemical Experiment: Design, Synthesis, and Photoelectronic Properties Study of Fully Non-Fused Ring Electron Acceptors. University Chemistry, 2025, 40(10): 263-275. doi: 10.12461/PKU.DXHX202412021
12. [12]
  Kai Yang , Gehua Bi , Yong Zhang , Delin Jin , Ziwei Xu , Qian Wang , Lingbao Xing . Comprehensive Polymer Chemistry Experiment Design: Preparation and Characterization of Rigid Polyurethane Foam Materials. University Chemistry, 2024, 39(4): 206-212. doi: 10.3866/PKU.DXHX202308045
13. [13]
  Yu Wang , Shoulei Zhang , Tianming Lv , Yan Su , Xianyu Liu , Fuping Tian , Changgong Meng . Introduce a Comprehensive Inorganic Synthesis Experiment: Synthesis of Nano Zinc Oxide via Microemulsion Using Waste Soybean Oil. University Chemistry, 2024, 39(7): 316-321. doi: 10.3866/PKU.DXHX202311035
14. [14]
  Cen Zhou , Biqiong Hong , Yiting Chen . Application of Electrochemical Techniques in Supramolecular Chemistry. University Chemistry, 2025, 40(3): 308-317. doi: 10.12461/PKU.DXHX202406086
15. [15]
  Hongyun Liu , Jiarun Li , Xinyi Li , Zhe Liu , Jiaxuan Li , Cong Xiao . Course Ideological and Political Design of a Comprehensive Chemistry Experiment: Constructing a Visual Molecular Logic System Based on Intelligent Hydrogel Film Electrodes. University Chemistry, 2024, 39(2): 227-233. doi: 10.3866/PKU.DXHX202309070
16. [16]
  Jia Zhou . Constructing Potential Energy Surface of Water Molecule by Quantum Chemistry and Machine Learning: Introduction to a Comprehensive Computational Chemistry Experiment. University Chemistry, 2024, 39(3): 351-358. doi: 10.3866/PKU.DXHX202309060
17. [17]
  Jiarong Feng , Yejie Duan , Chu Chu , Dezhen Xie , Qiu'e Cao , Peng Liu . Preparation and Application of a Streptomycin Molecularly Imprinted Electrochemical Sensor: A Suggested Comprehensive Analytical Chemical Experiment. University Chemistry, 2024, 39(8): 295-305. doi: 10.3866/PKU.DXHX202401016
18. [18]
  Feng Zheng , Ruxun Yuan , Xiaogang Wang . “Research-Oriented” Comprehensive Experimental Design in Polymer Chemistry: the Case of Polyimide Aerogels. University Chemistry, 2024, 39(10): 210-218. doi: 10.12461/PKU.DXHX202404027
19. [19]
  Qi Wang , Yicong Gao , Feng Lu , Quli Fan . Preparation and Performance Characterization of the Second Near-Infrared Phototheranostic Probe: A New Design and Teaching Practice of Polymer Chemistry Comprehensive Experiment. University Chemistry, 2024, 39(11): 342-349. doi: 10.12461/PKU.DXHX202404141
20. [20]
  Changjie Yin , Boyu Wang , Dantong Qiao , Huimin Li . Polymer Comprehensive Experimental Design: Preparation and Properties of Repeatable Processing Styrene Butadiene Rubber Materials under the “Dual Carbon” Strategy. University Chemistry, 2025, 40(11): 221-232. doi: 10.12461/PKU.DXHX202412046

Get Citation

PDF

XML

Metrics

PDF Downloads(18)
Abstract views(2045)
HTML views(161)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142