Highly selective and effective gold recovery from electronic wastewater by synergistic effect between covalent organic framework (COF) and MoS2: Performance and mechanisms

Separation and Purification Technology, Год журнала: 2024, Номер 338, С. 126599 - 126599

Опубликована: Фев. 2, 2024

Язык: Английский

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Efficient removal of fluoride from water: Adsorption performance of MgO-x adsorbents derived from Mg-MOF-74 and insights from DFT calculations

Separation and Purification Technology, Год журнала: 2024, Номер 352, С. 128190 - 128190

Опубликована: Май 29, 2024

Язык: Английский

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Insight into Cu (II) adsorption on pyrochar and hydrochar resultant from Acacia Senegal waste for wastewater decontamination

Chemosphere, Год журнала: 2024, Номер 356, С. 141881 - 141881

Опубликована: Апрель 3, 2024

Язык: Английский

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Novel recovery of a low-concentration gold thiosulfate complex through electroreduction via a walnut shell charcoal electrode

Deleted Journal, Год журнала: 2024, Номер 1(1), С. 58 - 66

Опубликована: Март 1, 2024

Low-concentration Au(S2O3)23− recovery is an urgent issue to facilitate the application of thiosulfate leaching instead cyanide in factories. Herein, this work presents a novel low-concentration combining adsorption and electrodeposition (electroreduction) realize high form gold particles (Au0). Walnut shells were used as raw material for successful preparation charcoal with porous structure rich oxygen-containing functional groups. shell (WSC) electrode achieved efficient Au(S2O3)23−. The under conditions was higher than 90%, highest reduction 46.97 mg·g−1. Applying suitable low voltage (0.8 V) facilitated recovery, which immensely improved that without voltage. performances applied via WSC related electrochemical abilities, including reaction intensity charge transfer. More reactive sites containing pores oxygen groups beneficial reaction. This offers new way recover cheap electrodes from solutions cyanide-free method industry.

Язык: Английский

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Dual-Crosslinking Polydopamine/Poly(imide dioxime) Porous Network Membrane Enables Efficient and Selective Gold Recovery from e-Waste

ACS ES&T Engineering, Год журнала: 2024, Номер 4(10), С. 2403 - 2414

Опубликована: Июль 20, 2024

With the sharp increase in electronic and electrical equipment as well concomitant waste, it is imperative to recover precious metals from secondary resources perspective of environment protection sustainable development. Herein, a free-standing, dual-cross-linking polydopamine (PDA) conjunction with poly(imide dioxime) (PIDO) porous membrane (denoted PDA/PIDO) fabricated via facile interfacial polymerization method for gold recovery. As expected, constructed PDA/PIDO features hierarchical structure, ample active sites, excellent hydrophilicity, endowing an ultrahigh capture capacity (3368 mg g–1), fast equilibrium time (35 min), superior recovery selectivity (separation factor Au/Cu = 5.4 × 105, Au/Ni 3.9 105), high flux (1050 L m2 h–1), retention rate (98%). Furthermore, proposed also competent selective central processing unit leachate remarkable efficiency continuous-flowing filtration system, highlighting its huge potential practical large-scale e-waste.

Язык: Английский

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Efficient and selective gold recovery from electronic wastewater by synergistic effect between Fe3O4 nanoparticles and quaternary ammonium salt

Journal of Environmental Management, Год журнала: 2025, Номер 386, С. 125793 - 125793

Опубликована: Май 14, 2025

Язык: Английский

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Roasted dolomite adsorbing gold from thiosulfate leaching solution of a gold ore: Effective inhibition of preg-robbing via thiocyanate addition

Powder Technology, Год журнала: 2025, Номер unknown, С. 121156 - 121156

Опубликована: Май 1, 2025

Язык: Английский

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Solvent Extraction of Au(III) by 2-ethylhexanol and Kinetic Modelling of the Facilitated Transport Across a Liquid Membrane

Опубликована: Фев. 20, 2024

The solvent extraction of gold(III) by undiluted 2-ethylhexanol or dissolved in toluene from HCl solution has been investigated. numerical analysis gold distribution data suggests the formation HAuCl4·L and HAuCl4·2L (L= 2-ethylhexanol) species organic phase with constants K11= 38 K12= 309, respectively. results derived have implemented a solid-supported liquid membrane system. influence several variables on transport was considered: feed receiving phases stirring speeds, concentrations carrier concentration as well presence base metals (Fe,Cu,Ni) PGMs phase. Also, diffusional resistances to mass transfer are estimated. Gold is recovered zero valent nanoparticles.

Язык: Английский

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Solvent Extraction of Gold(III) by 2-Ethylhexanol and Modeling of Facilitated Transport across a Supported Liquid Membrane

Processes, Год журнала: 2024, Номер 12(4), С. 771 - 771

Опубликована: Апрель 11, 2024

The solvent extraction of gold(III) by undiluted 2-ethylhexanol or dissolved in toluene from a HCl solution has been investigated this paper. numerical analysis gold distribution data suggests the formation HAuCl4·L and HAuCl4·2L (L = 2-ethylhexanol) species organic phase, with constants K11 38 K12 309, respectively. results derived have implemented solid-supported liquid membrane system. influence several variables on transport considered: feed receiving phases’ stirring speeds, concentrations carrier concentration phase as well presence base metals (Fe, Cu, Ni) platinum-group (PGMs) phase. Gold is influenced speed variation (feed phase) (membrane concentrations. Also, diffusional resistances to mass transfer are estimated, contribution each resistance estimated. recovered zero-valent nanoparticles.

Язык: Английский

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Enhancing capture of As(V) through a sulfonic-acid-functionalized 2D crystal Ce-5-SIP-MOF and its insights from DFT calculations

Separation and Purification Technology, Год журнала: 2024, Номер 357, С. 129924 - 129924

Опубликована: Окт. 12, 2024

Язык: Английский

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