High volumes of untreated wastewater are discharged into various water bodies worldwide, leading to the distortion and deterioration of the aquatic environment. The use of untreated wastewater to irrigate food crops often results in food poisoning-related deaths due to high levels of pollutants, including heavy metals. Herein, bimetallic oxides (Ag 2 O/ZnO) were incorporated on the surface of multiwall carbon nanotubes (MWCNTs) by wet impregnation at different mixing ratios to design Ag 2 O/ZnO/MWCNTs nanocomposites (AZM X ), which were used for the removal of Cr, Pb and Zn ions from irrigation water. The synthesized nanocomposites were characterized by BET, XRD, TEM, and SEM/EDS to confirm the successful incorporation of Ag 2 O/ZnO on the surface of MWCNTs. The characterization results confirmed the formation of highly crystalline materials with enhanced surface area, which can be attributed to the improved dispersion and interfacial interaction between Ag₂O/ZnO and MWCNTs. This synergistic effect increases the effective surface area regardless of the mixing ratios relative to individual nanoparticles. Among the tested heavy metals, Pb showed the highest removal efficiency (98.62%) using the AZM 2:1:1 nanocomposite under optimum conditions of dosage (0.8 g) and contact time (25 min). The adsorption data fitted well with the Langmuir isotherm model, suggesting that the heavy metals adsorbed to the surface of AZM X in a monolayer fashion. The adsorption kinetics revealed that the adsorption process was better explained by pseudo-second-order kinetics. Thermodynamic studies demonstrated that the metal ion adsorption by AZM X was spontaneous, feasible, and endothermic. The desorption study revealed that hydrochloric acid was the most effective desorbing agent. The AZM 2:1:1 nanocomposite maintains more than 90% removal rate of Pb after five regeneration cycles. This study suggested that the developed novel bimetallic oxides–MWCNTs nanocomposites are capable of efficiently removing metal ions from aqueous environments. • A novel AZMx composites was designed for effective metal ions removal. • Characterization confirmed successful incorporation of Ag 2 O/ZnO on MWCNTs surface. • Adsorption followed pseudo-second-order kinetics and Langmuir isotherm. • Thermodynamic analysis showed the process is endothermic and spontaneous. • AZM2:1:1 showed better adsorption performance toward Cr(VI), Pb(II), and Zn(II). • The AZM2:1:1 retained 90% of Pb removal even after 5 reuse cycles.

A unique compound 3c targets GSK-3β and metal ion, interferes with tau and metal dyshomeostasis, promotes neurite outgrowth, decreases Aβ accumulation and ABTS•+, and enhances zebrafish motility.

Metal ion-amplified phototherapy for tumors: Mechanisms, nanomaterial design, and synergistic strategies.

Engineering coordination-defined metal–phenolic networks: From molecular self-assembly to system-level platforms for advanced tumor therapy

Pyridinethione-encapsulated Pillared MOF containing PDMS hybrid coatings with remarkable antibacterial and anti-fouling properties

Biochemical characterization of heterologously expressed Thiomonas delicata arsenite oxidase subunits (AioA and AioB).

Identification and functional analysis of Blastocystis sp. ST2 Cation transporter.

Antioxidant peptide from Synechococcus marine microalgae with therapeutic potential against human colon adenocarcinoma

Decoupling of microbial diversity and ecosystem function driven by metal ions and nutrient shifts across dry-wet seasons in a temperate river basin

Advancements in Bimetallic Metal-Organic Frameworks for Oral Medicine.

Synthesis and application of SBA-Pr-N-Is@Pd as an efficient catalyst in the reduction of nitroarenes: Experimental and DFT insights.

Rational design and functionalization of covalent organic frameworks for multivalent metal ion storage

Folate-targeted, ethylenediaminetetraacetic acid-embedded, methotrexate-loaded albumin nanoparticles: Molecular modeling, design optimization, and in vitro anticancer evaluation in breast cancer cells.

Heterologous expression of 20α-hydroxysteroid dehydrogenase in Escherichia coli for the production of 20α-hydroxyprogesterone.

Corrosion behavior and mechanism of 316SS and Hastelloy C276 in supercritical water containing ammonia and ethanol

Lysosome-targeted copper-modulated carbon dots with near-infrared fluorescence imaging and enhanced photodynamic therapy effects.

Engineering diphenyl-coumarin-amide BioAIEgens for selective Cu2+ detection and real-time imaging of mitophagy.

Characterization of cadmium-doped nZVI residuals: Structure, morphology, and photoelectrochemical properties

Metal ion catalysed degradations of a di-2-pyridyl ketone based dihydrazone for distinct metal complexes of biological potentials

The development of simple and efficient analytical methods is fundamental for controlling the levels of toxic metals in liquid samples. In the present study, it is proposed the fabrication of a microstructured substrate based on filter paper, using in situ growth method of silver nanoparticles (AgNPs) into silver microparticles (AgMPs) to enhance the LIBS emission signal in the determination of Cu(II) in different liquid samples. Initially, ascorbic acid, NaBH4 and SnCl2 were evaluated as reducing agents for Ag particle formation. An 8-fold improvement in the copper signal was obtained when SnCl2 was used. The Ag particles obtained with the latter reducing agent were further grown, and the signal was enhanced up to 14-fold compared to the traditional LIBS method using unmodified filter paper. UV-Vis diffuse reflectance spectroscopy, X-ray diffraction measurements, and scanning electron microscopy (SEM) indicated efficient immobilization of both Ag nano- and microparticles on the microfibers of substrate. A calibration analytical curve for Cu(II) ions was obtained with a coefficient of determination (R2) of 0.99, a linear response from 0.2 to 1.0mgL-1, and LOD and LOQ of 34 and 114μgL-1, respectively. The signal enhancement achieved with the microstructured substrate fabricated using the in situ growth method can be attributed to the synergistic effect of the nanostructures present in the cellulosic microfibers and the surface enhancement caused by the dense layer of Ag microparticles. The developed analytical strategy was successfully applied to the determination of Cu(II) ions in fortified samples of river water, artificial urine, tea infusion, and canned tea, providing recoveries ranging from 85 to 112%. These results indicate the effectiveness of a microstructured silver substrate for sensitive detection of metal ions at low concentrations in liquid samples.