An Adsorbent for Efficient and Rapid Gold Recovery from Solution: Adsorption Properties and Mechanisms

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Adsorption is an efficient and highly selective method for gold recovery. Introducing rich N/S organic groups to combine with metal-organic frameworks (MOFs) as adsorbents regarded a practical approach enhance Herein, MOF (zirconium isothiocyanatobenzenedicarboxylate MOF, UiO-66-NCS) was designed amidinothiourea (AT) form UiO-66-AT amidothiourea-benzenedicarboxylate MOF) rapid adsorption. The prepared delivers improved adsorption capacity (about 903.02 mg/g at 1000 mg·L-1 of the initial Au3+) impressive rate within minutes 10 min 200 Au3+). Meanwhile, it exhibits sustainable stability after 5 cycles retention 99.52% excellent selectivity 98.76% in actual wastewater. According advanced characterizations Density Functional Theory (DFT) simulation, mechanism might be elaborated electrostatic adsorption, chelating coordination, chemical reduction. modified active provide sites Au(III) reduction Au(0). maintains large high surface activity while realizing stable application multiple cycles, which good value.

Language: Английский

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High-Efficiency Catalytic Ozonation Degradation of Ni Complex Wastewater Using Mn-N Codoped Active Carbon Catalyst

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 3, 2025

With the rapid development of electroless nickel (Ni) plating industry, a large amount Ni complex wastewater is inevitably produced, which serious threat to ecological environment. Herein, novel Mn-N codoped active carbon (Mn-N@AC) catalyst with high catalytic ozonation ability was synthesized by impregnation precipitation method and characterized BET, XRD, Raman, SEM, FTIR, TPR. Meanwhile, Mn-N@AC showed excellent ability, stability, applicability. When Ni-EDTA (TOC = 400, 58.05 mg/L) used as simulated wastewater, removal efficiency TOC total reached 97.8 92.7%, respectively, after three cycles, still up 93.6%. replaced Ni-citrate, Ni-tartaric, Ni-malate, remained above 93%. In addition, mechanistic insights quenching experiments EPR verified mainly attributed indirect oxidation ·OH ·O2–, potential mechanism proposed. The work provides into deep low cost efficiency.

Language: Английский

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Tailored Fibrils Approach via Ag(I).Peptidomimetic-Based Interface Design: Efficient Encapsulation of Diverse Active Pharmaceutical Ingredients in Wastewater Remediation during Effluent Treatment Plant (ETP) Processing

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 22, 2025

Pharmaceutical pollution in wastewater poses significant environmental and public health concerns worldwide. Chloramphenicol (CP), an antibiotic widely used medical veterinary applications, is among the active pharmaceutical ingredients (APIs) frequently detected aquatic environments. This study explored encapsulation of chloramphenicol API contaminated using rationally designed fibrations based on silver metal ion-directed self-assembly fibrillator-type self-assembling ligand (ANS-3). We further investigated removal various commonly prescribed drugs, including antibiotics such as β-lactam (amoxicillin), fluoroquinolone (ciprofloxacin), aminoglycoside (neomycin), tetracycline; antiparasitic agents with antiprotozoal properties (praziquantel metronidazole); nonsteroidal anti-inflammatory drugs (NSAIDs) phenylbutazone ketoprofen; vasodilator isoxsuprine; amphiphilic antidepressants (amitriptyline); antiviral drug amantadine. The findings validated crucial influence polar multifunctionality structural complexity enhancing interactions Ag.ANS-3 matrix, emphasizing its potential for efficient sequestration. First, picolinic acid (PA) phenylalanine (F) were evaluated their ability to form fibrillar structures, morphological characterization revealed well-defined networks varying degrees porosity interconnectivity. Then, strategic inclusion leucine synthesizing ANS-3 facilitated formation robust networks, employing hydrophobic drive process. Finally, APIs was Ag(I) ion-driven self-assembled nanofibrous material. research contributes development innovative physicochemical treatment strategies remediation validates importance rational design encapsulation-based technologies.

Language: Английский

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Electrospun Polyvinyl Chloride/UiO-66(COOH)₂ Nanocomposite Membranes for Efficient and Rapid Heavy Metal Removal

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 27, 2025

This study explores the effectiveness of a new composite membrane fabricated from poly(vinyl chloride) (PVC) and UiO-66(COOH)2 metal-organic framework (MOF) for removal heavy metals water. The electrospinning technique was successfully employed to homogeneously incorporate nanocrystals into PVC, producing fibrous membranes. membranes were fully characterized using several techniques such as scanning electron microscopy (SEM), capillary flow porometry, powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), tensile strength analysis. metal performance evaluated against lead, cadmium, mercury in both single mixed solutions at different concentrations. Results indicated high efficiency (>90%) selectivity lead solutions, especially concentrations less than 50 ppm, along with adsorption capacity (Qmax = 203 mg/g). While cadmium demonstrated lower % 40% compared 80% it exhibited highest 1312 mg/g) among three metals. For mercury, however, decrease more pronounced, only 10% systems lowest 40.5 Further experiments showed that presence salts, chlorides, nitrates, sulfates, did not significantly affect removal. Conversely, consistently low, regardless these conditions. Additionally, temperature-dependent studies revealed increasing temperature enhanced capacity, confirming process spontaneous endothermic. Interestingly, reusability consistent over 90% after four cycles use, particularly 15 although other efficiency. Almost all pollutants better fit Langmuir second-order kinetic models, suggesting is single-layered chemical process. Furthermore, holder design three-dimensional (3D) printing tested underscore potential PVC/MOFs effective materials efficient rapid remediation (5 mins) contaminated water sources. improved while maintaining mechanical stability, addressing issue handling MOFs alone by providing robust matrix support membrane. approach facilitates easier efficiency, paving way industrial applications.

Language: Английский

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Insight into the Specific Adsorption of Cu(II) by a Zinc-Based Metal–Organic Framework Mediated via a Proton-Exchange Mechanism

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: March 12, 2025

In the context of scarce metal resources, one-step separation and recovery high-value copper ions from secondary resources is significant importance presents substantial challenges. This study identified a Zn-based triazole MOF (Zn(tr)(OAc)) with accessible noncoordinated terminal hydroxyl groups within its framework. The Zn(tr)(OAc) surpasses most currently reported Cu-specific adsorbents regarding adsorption capacity Cu2+ selectivity. Furthermore, in experiment Cu2+, concentration was increased 79.64% simulated resource solution to 98.62% adsorbed phase. Both experimental theoretical studies indicated that high ion selectivity for primarily due specific recognition ability (-OH) group, enabling only undergo proton exchange hydrogen. strong material attributed not between framework but also interactions nitrogen (N) oxygen (O) atoms heterocyclic rings Cu2+. summary, demonstrates great potential provides additional possibilities enhancing MOF-based adsorbents.

Language: Английский

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Fabrication of defect-free MIL-96 membrane via aluminum isopropoxide gel layer towards exceptional H2/CO2 separation

Chemical Engineering Science, Journal Year: 2025, Volume and Issue: unknown, P. 121600 - 121600

Published: March 1, 2025

Language: Английский

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Next-generation biomass nanocomposites for heavy metal ion adsorption: innovations and environmental impact

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 133157 - 133157

Published: April 1, 2025

Language: Английский

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Preparation of Microelectrolysis Filler Using Coal Slag for the Removal of Hazardous Substances in Contaminated Water

Langmuir, Journal Year: 2024, Volume and Issue: 40(43), P. 23041 - 23050

Published: Oct. 19, 2024

Presently, the utilization of gasification slag in context wastewater treatment is constrained. Furthermore, presence dye and containing hazardous metals represents a significant threat to human health. Accordingly, present study prepared microelectrolytic filler (MF) from via high-temperature roasting method evaluated its degradation performance water organic matter harmful metal ions. The impact varying preparation conditions, including initial solution pH MF dose, on process was examined. removal methyl blue found be 92.21% at an 2, reaction time 300 min dosage 40 g L

Language: Английский

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