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Groundwater contamination by potentially harmful elements (PHEs) originating from the weathering of granitic and gneissic rock dissolution poses a public health concern worldwide. This study investigated physicochemical variables and PHEs in the groundwater system and mine water of the Adenzai flood plain region, in Pakistan, emphasizing the fate distribution, source provenance, chemical speciation, and health hazard using the human health risk assessment HHRA-model. The average concentrations of the PHEs, viz., Ni, Mn, Cr, Cu, Cd, Pb, Co, Fe, and Zn 0.23, were 0.27, 0.07, 0.30, 0.07, 0.06, 0.08, 0.68, and 0.23 mg/L, respectively. The average values of chemical species in the groundwater system, viz., H⁺, OH⁻, Ni²⁺, Mn²⁺, Mn³⁺, Cr³⁺, Cr⁶⁺, Cu⁺, Cu²⁺, Cd²⁺, Pb²⁺, Pb⁴⁺, Co²⁺, Co³⁺, Fe²⁺, Fe³⁺, and Zn²⁺, were 1.0 × 10⁻⁴ ± 1.0 × 10⁻⁶, 1.0 × 10⁻⁴ ± 9.0 × 10⁻⁷, 2.0 × 10⁻¹ ± 1.0 × 10⁻³, 3.0 × 10⁻¹ ± 1.0 × 10⁻³, 1.0 × 10⁻²² ± 1.0 × 10⁻²³, 4.0 × 10⁻⁶ ± 2.0 × 10⁻⁶, 4.0 × 10⁻¹¹ ± 2.0 × 10⁻¹¹, 9.0 × 10⁻³ ± 1.0 × 10⁻², 2.0 × 10⁻¹ ± 2.0 × 10⁻³, 7.0 × 10⁻² ± 6.0 × 10⁻², 5.0 × 10⁻² ± 5.0 × 10⁻², 2.0 × 10⁻² ± 1.5 × 10⁻², 6.0 × 10⁻² ± 4.0 × 10⁻², 8.0 × 10⁻³¹ ± 6.0 × 10⁻³¹, 3.0 × 10⁻¹ ± 2.0 × 10⁻⁴, 4.0 × 10⁻¹⁰ ± 3.0 × 10⁻¹⁰, and 2.0 × 10⁻¹ ± 1.0 × 10⁻¹. The mineral compositions of PHEs, viz. Ni, were bunsenite, Ni(OH)₂, and trevorite; Mn viz., birnessite, bixbyite, hausmannite, manganite, manganosite, pyrolusite, and todorokite; Cr viz., chromite and eskolaite; Cu viz., CuCr₂O₄, cuprite, delafossite, ferrite-Cu, and tenorite; Cd viz., monteponite; Pb viz, crocoite, litharge, massicot, minium, plattnerite, Co viz., spinel-Co; Fe viz., goethite, hematite, magnetite, wustite, and ferrite-Zn; and Zn viz., zincite, and ZnCr₂O₄ demarcated undersaturation and supersaturation. However, EC, Ca²⁺, K⁺, Na⁺, HCO₃⁻, Cr, Cd, Pb, Co, and Fe had exceeded the WHO guideline. The Nemerow’s pollution index (NPI) showed that EC, Ca²⁺, K⁺, Na⁺, HCO₃⁻, Mn, Cd, Pb, Co, and Fe had worse water quality. Principal component analysis multilinear regression (PCAMLR) and cluster analysis (CA) revealed that 75% of the groundwater contamination originated from geogenic inputs and 18% mixed geogenic-anthropogenic and 7% anthropogenic sources. The HHRA-model suggested potential non-carcinogenic risks, except for Fe, and substantial carcinogenic risks for evaluated PHEs. The women and infants are extremely exposed to PHEs hazards. The non-carcinogenic and carcinogenic risks in children, males, and females had exceeded their desired level. The HHRA values of PHEs exhibited the following increasing pattern: Co > Cu > Mn > Zn > Fe, and Cd > Pb > Ni > Cr. The higher THI values of PHEs in children and adults suggested that the groundwater consumption in the entire region is unfit for drinking, domestic, and agricultural purposes. Thus, all groundwater sources need immediate remedial measures to secure health safety and public health concerns. Full article

We report on the electromagnetic properties of Co²⁺ substituted spinel MgCuZn ferrites developed via a facile molten salt synthesis (MSS) route. The choice of synthesis route in combination with cobalt substitution led to strong electromagnetic properties such as high saturation magnetization (i.e., 63 emu/g), high coercivity (17.86 gauss), and high initial permeability (2730), which are beneficial for the multilayer chip inductor (MLCI) application. In a typical process, the planned ferrites were synthesized at 800 °C using sodium chloride as a growth inhibitor, with dense morphology and irregularity in the monolithicity of the grains. The compositional analysis of as-prepared ferrite confirms the presence of desired elements with their proportion. The crystallite size (using X-ray diffraction (XRD) analysis) for different samples varies in the range of 49–51 nm. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis showcases the compact morphology of the developed samples, which is typical in the ferrite system. The dielectric properties (dielectric-loss and dielectric-constant) in the frequency range of 100Hz–1MHz suggest normal dielectric distribution according to interfacial polarization from Maxwell–Wagner. From the developed ferrites, upon comparison with a low dielectric loss with high permeability value, Mg-Cu-Zn ferrite with Co = 0.05 substitution proved to be a stronger material for MLCIs with high-performance applications. Full article