Journal ArticleDOI
Green Route for Beneficiation of Metallic Materials from Electronic Waste for Selective Reduction of CO2
Nidhi Sharma,Anurag Bajpai,Pradeep Kumar Yadav,Subramanian Nellaiappan,Sudhanshu Sharma,Chandra Sekhar Tiwary,Krishanu Biswas +6 more
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TLDR
In this article, the authors demonstrate an easily scalable green route for the beneficiation and effective usage of metallic materials from the e-waste using cryo-temperature grinding with the primary objective of retrieving the near-full metallic residue from ewaste by an energy-efficient and eco-friendly approach.Abstract:
The effective disposal of ever-increasing electronic waste (e-waste) is one of the grand challenges for the scientific and technological community today. As e-waste has exponentially been increasing the burden on our environment with long-term effects on the ecosystem, the need for finding sustainable means to recover, reuse, and recycle the materials available in the e-waste is much sought after in the present time. In this background, we demonstrate an easily scalable green route for the beneficiation and effective usage of metallic materials from the e-waste using cryo-temperature grinding with the primary objective of retrieving the near-full metallic residue from e-waste by an energy-efficient and eco-friendly approach. The metallic nanoparticles thus obtained are subsequently utilized for the selective reduction of CO₂ into different gaseous products via the electrochemical route, leading to the evolution of CH₄, H₂, and CO as major gaseous products at neutral pH and CO as the major product at basic pH. In a nutshell, the current approach can provide useful means for achieving major metallic residue from the e-waste, which can further be utilized for green energy production in an eco-friendly manner, making the process sustainable.read more
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Recycling copper and gold from e-waste by a two-stage leaching and solvent extraction process
TL;DR: In this paper, a new hydrometallurgical route for the technically feasible recycling of copper and gold from waste printed circuit boards (WPCBs) of mobile phones is presented.
Journal ArticleDOI
Melanins as Sustainable Resources for Advanced Biotechnological Applications
Hanaa A. Galeb,Hanaa A. Galeb,Emma L. Wilkinson,Alison Stowell,Hungyen Lin,Samuel T. Murphy,Pierre L. Martin‐Hirsch,Richard L. Mort,Adam Michael Taylor,John G. Hardy +9 more
TL;DR: This review focuses on the application of analytical techniques to study melanins in multidisciplinary contexts with a view to their use as sustainable resources for advanced biotechnological applications, and how these may facilitate the achievement of the United Nations Sustainable Development Goals.
Journal ArticleDOI
Recent Advances in Bio-Templated Metallic Nanomaterial Synthesis and Electrocatalytic Applications.
Yani Pan,Waldemir J. Paschoalino,Waldemir J. Paschoalino,Amy Szuchmacher Blum,Janine Mauzeroll +4 more
TL;DR: Recent research developments in bio-approaches for metallic nanomaterial synthesis and their applications in electrocatalysis for sustainable energy storage and conversion systems are presented.
Journal ArticleDOI
Mechanism of Gold Cyanidation in Bioleaching of Precious Metals from Waste Printed Circuit Boards
TL;DR: In this article, density functional theory (DFT) was employed to investigate the electronic structure of the complex existing in the Au cyanidation process, and extended charge decomposition analysis (ECDA) showed that the adsorption of CN-to Au and the formation of O to the formed [AuCN]⁻ caused net electron transfer of 0.356 and 0.574 au, respectively.
Journal ArticleDOI
Direct Reuse of Spent Lithium-Ion Batteries as an Efficient Heterogeneous Catalyst for the Reductive Upgrading of Biomass-Derived Furfural
Anthony J. Nownes,Luis Balderas +1 more
TL;DR: In this article , the mixture of anodic and cathodic materials arising from mechanical shredding of spent Li-ion batteries can be easily converted into an efficient heterogeneous catalyst for selective reductions.
References
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Journal ArticleDOI
Selective Formation of C2 Compounds from Electrochemical Reduction of CO2 at a Series of Copper Single Crystal Electrodes
TL;DR: In this article, the authors used the X-ray back reflection method to determine the crystal orientation of a single crystal in graphite crucibles and showed that the introduction of (111) steps to the basal plane, leading to Cu(S)-[n(100) × (111)] orientations, significantly promoted C2H4 formation and suppressed CH4 formation.
Journal ArticleDOI
Copper atom-pair catalyst anchored on alloy nanowires for selective and efficient electrochemical reduction of CO 2
Jiqing Jiao,Jiqing Jiao,Rui Lin,Shoujie Liu,Weng-Chon Cheong,Chao Zhang,Zheng Chen,Yuan Pan,Jianguo Tang,Konglin Wu,Sung Fu Hung,Hao Ming Chen,Lirong Zheng,Qi Lu,Xuan Yang,Bingjun Xu,Hai Xiao,Jun Li,Dingsheng Wang,Qing Peng,Chen Chen,Yadong Li +21 more
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