1. Introduction. Arbitrary disposing of gold-containing materials will not only cause environmental pollution and endanger human health, but also result in a waste of scarce resources [1].Therefore, there is an urgent need to develop an efficient separation and recovery technology for resource recycling [2], [3], [4].Hydrometallurgy is generally a …
In a solution with an initial gold ion concentration of 100 mg/L, the adsorption efficiency reached 85 % within five minutes and 98 % within 30 min (Fig. 3 g), which is in stark contrast to the long contact times required by other available gold adsorbents. Its adsorption rate is significantly superior to that of the majority of reported ...
Here, we report a thiazoyl covalent organic framework, namely ECUT-COF-29, for gold recovery. Under visible light irradiation, this material can reduce Au 3+ to Au …
Gold-YOLO: Efficient Object Detector via Gather-and-Distribute Mechanism. Part of Advances in Neural Information Processing Systems 36 (NeurIPS 2023) ... Gold-YOLO-N attains an outstanding 39.9% AP on the COCO val2017 datasets and 1030 FPS on a T4 GPU, which outperforms the previous SOTA model YOLOv6-3.0-N with similar FPS by …
On the contrary, TbTsc with low crystallinity due to the lack of hydroxyl group has low removal efficiency for gold ions. Finally, we also studied the practical application of TpTsc to recover gold from electronic waste. Our work synthesizes a new adsorbent and provides the possibility of recovering gold from complex environment.
Developing an extremely efficient and highly selective process for gold recovery is urgently desired for maintaining a sustainable ecological environment. Herein, we report a highly efficient gold-recovery protocol on the basis of the instantaneous assembly between cucurbit[6]uril (CB[6]) and [AuX4]− (X = Cl/Br) anions. Upon mixing CB[6] with the four …
A simple and sustainable way to recover gold from cyanide solution using magnetic activated carbon synthesized via a solvothermal method has been developed and showed 99.1% recovery efficiency of gold from 10 mg/L solution within 5 h, which is much faster compared to the commercial granular activated carbon. Activated carbon has been used …
We have shown that the gold-assisted exfoliation of MoS 2 on flexible substrates enables the fabrication of large MoS 2 layers with effective strain transfer capabilities. In fact, using a gold interfacial layer improves the efficiency of the strain transfer as a result of the strong interaction and bonding between Au and MoS 2. …
The developed pyrocarbon demonstrates remarkable efficiency as a gold sorbent, exhibiting a high recovery capacity (2829.7 mg g −1), exceptional gold selectivity (with a K d of 3.1 × 10 8 mL g ...
Invisible gold hosted by pyrite represents a large proportion of gold resources worldwide. Gold is enriched in pyrite relative to hydrothermal fluids by five orders of magnitude, but controls on the hyperenrichment of gold in pyrite remain unclear. Here, we present the first micrometer- to nanometer-scale evidence for a colloidal iron sulfide …
The efficient partitioning of gold into iron sulfide colloids is mainly controlled by the highly porous, defect-rich, and reactive surfaces of iron sulfide colloids (Rickard …
Covalent organic frameworks (COFs) have attracted considerable attention as adsorbents for capturing and separating gold from electronic wastes. To enhance the binding capture efficiency, constructing hydrogen-bond nanotraps along the pore walls was one of the most widely adopted approaches. However …
A new α-C(sp 3) H alkynylation of unactivated tertiary aliphatic amines with 1-iodoalkynes as radical alkynylating reagents in the presence of [Au 2 (μ-dppm) 2] 2+ in sunlight provides propargylic amines. Based on mechanistic studies, a C C coupling of an α-aminoalkyl radical and an alkynyl radical is proposed for the C(sp 3) C(sp) bond formation.
The developed pyrocarbon demonstrates remarkable efficiency as a gold sorbent, exhibiting a high recovery capacity (2829.7 mg g −1), exceptional gold …
Gold-rated PSUs, with their commendable efficiency levels, ensure that a significant portion of the power drawn from the wall is effectively used to run the computer components. This efficiency translates to less wasted electricity, which can lead to reduced energy bills over time. Typical Use Cases and Target Audience
Edikan gold mine (EGM) is a large-scale, low-grade conventional open-pit mine located in the Ashanti Gold Belt of Ghana, West Africa.
The efficiency of gold recovery reaches 99.8% when dibutyl carbitol is deployed as the additive. This cocrystallization is highly selective for square-planar tetrabromoaurate anions.
Here, we provide compelling evidence for the presence of iron sulfide colloids in chalcedony that hosts fine-grained spherical gold-rich pyrite aggregates …
Gold nanoparticle coatings as efficient adenovirus carriers to non-infectable stem cells RSC Adv. 2019 Jan 10;9(3) :1327-1334. ... Our data showed that the use of positively charged 14 nm gold nanoparticles either functionalized with arginine-glycine-aspartate (RGD) motif or not, increases the efficiency of adenovirus infection in …
1. Introduction. Gold (Au), as an indispensable precious metal, has been massively applied in jewelry fabrication, medicine field and electronic product [[1], [2], [3]].Besides natural mineral, urban mine is also regarded as important source to obtain gold because of increased generation of electronic waste (e-waste) recently [4].Up to date, cyanide …
Efficiency: Increases the mining speed. V Enchanting Table Anvil: 10 Fortune: Increases the amount of drops when mining. III Enchanting Table Anvil: 2 ... Give a piglin a gold item while it is aggressive toward the player. 30G: Silver: Advancements [edit | edit source] Icon Advancement In-game description Actual requirements (if different)
A gold recovery of more than 93% can be achieved in the Au(S 2 O 3) 2 3– concentration range of 1 mg/L to 7.5 mg/L, which is also achieved for a thiosulfate leaching solution. Such a superior gold recovery is attributed to the increase of electron concentration on Ag/MoS 2 NSs surface, which results from the . CRediT authorship …
Rapid and efficient identification of bacteria using gold-nanoparticle-poly(para-phenyleneethynylene) constructs Angew Chem Int Ed Engl . 2008;47(14):2590-4. doi: 10.1002/anie.200703369.
Here we demonstrate an environmentally-benign and practical approach for gold recovery from E-waste leachate using alginate-derived pyrocarbon sorbent.
Covalent organic frameworks (COFs) have attracted considerable attention as adsorbents for capturing and separating gold from electronic wastes. To enhance the binding capture efficiency, constructing hydrogen-bond nanotraps along the pore walls was one of the most widely adopted approaches.
The WisdomTree Efficient Gold Plus Equity Strategy Fund seeks total return by investing, either directly or through a wholly-owned subsidiary, in a portfolio comprised of U.S.-listed gold futures contracts and U.S. large-cap equity securities ...
DOI: 10.1016/j.rnrec.2023.107165 Corpus ID: 260755551; Polythioamide-g-C3N4 for highly efficient and selective gold recovery @article{Zhou2023PolythioamidegC3N4FH, title={Polythioamide-g-C3N4 for highly efficient and selective gold recovery}, author={Hongjie Zhou and Wenjin Zhao and Shun Zhang and Xiaoqiang An and …
Sulfur is a massive byproduct of the petrochemicals industry and hardly employed as a building block for porous organic polymers (POPs). Here, a new family of sulfur-bridged POPs has been prepared via a C–H insertion reaction between sulfur and polycyclic aromatic hydrocarbons. Sulfur works as a solvent, external cross-linker, and …
Exploring a plasmid DNA (pDNA)/small interfering RNA (siRNA) delivery vector with excellent biocompatibility and high gene transfection efficiency still remains a great challenge. In this research, generation 5 (G5) dendrimer-entrapped gold nanoparticles (Au DENPs) partially modified with polyethylene glycol
Gold-Platinum Nanoparticles with Core-Shell Configuration as Efficient Oxidase-like Nanosensors for Glutathione Detection Nanomaterials (Basel). ... In this work, we have synthetized a gold-platinum Au@Pt nanoparticle with core-shell configuration exhibiting a remarkable oxidase-like mimicking activity towards the substrates 3,3',5,5 ...
The amino-functionalized covalent triazine frameworks (NH 2-CTFs) were prepared for gold recovery from waste electronic and electric equipment.. NH 2-CTFs with high porosity and good thermal stability exhibit excellent gold recovery performance.. The gold ions can be in situ reduced into gold nanoparticles by NH 2-CTFs and the purity of …
It is noteworthy that the gold content in e-waste is exceptionally high (280 g·t −1), with its recycling value surpassing that of traditional gold mines (3–30 g·t −1) [3]. Hence, extracting gold from e-waste is particularly essential to address resource shortage and mitigate environmental challenges.
Here, we report a thiazoyl covalent organic framework, namely ECUT-COF-29, for gold recovery. Under visible light irradiation, this material can reduce Au3+ to Au0 in a short time, and the adsorption capacity is as high as 3714 mg g−1, showing great potential in gold recovery.
Note: The image shows various top sluice boxes for efficient gold recovery. Types of Sluice Boxes for Gold Prospecting. When it comes to gold prospecting, there are several different types of sluice boxes available, each with its own unique features and designs. Understanding the different types can help you choose the right sluice box for …
Extracting gold from wastes of electronic equipment (e-waste) is a sustainable strategy for the recovery of the precious metal, reducing environmental pollution, and addressing the growing demands for gold resources. In this work, we synthesized a thiourea-modified porous aromatic framework (PAF-1-thiourea) with …
As depicted in the Fig. 8 A, the extraction efficiency of gold by [EB-IM][NTf 2] can reach a balance within 1 min. Notably, as indicated in Table S2, [EB-IM][NTf 2] exhibits faster extraction kinetics than most excellent commercial extractants, other ILs and other extractant reported in recent years, which is also a significant advantage of [EB ...