Cupric sulfate

This study focuses on the effects of saline water on the selective flotation of a Pb/Zn complex sulfide ore.Batch flotation experiments were carried out using NaCl solutions as well as seawater.It was found that increasing NaCl concentration in solution from 1 mM to 500 mM had a pos. effect on the Pb and Zn recoveries.When comparing recoveries in the highest NaCl concentration in solution to seawater, Pb recovery decreased by 48%, most likely due to the presence of addnl. ions such as Ca²⁺ and Mg²⁺.On the contrary, Zn recovery in seawater increased by 55%, and this increase could be attributed to the SO₄^2- ion effect from seawater.DLVO-like theor. analyses using pH-dependent charge regulated models of surface charge were employed to study particle-particle and particle-bubble interactions during sulfide ore flotation under different NaCl concentrations and solution pH.The theor. predictions of the models supported the exptl. results, with a stronger particle-bubble attraction predicted by the models at higher NaCl concentrationsOverall, results demonstrated the potential of using the theor. predictions for describing the various interactions during sulfide ore flotation in saline water.

The contamination of water sources with dyes like methylene blue poses significant environmental and health challenges.To overcome this problem, the development of materials capable of effectively removing dyes is essential.This research focuses on the synthesis, characterization as well as application of a CuO-based hydrogel nanocomposite (NAM@CuO NCs) as an adsorbent for methylene blue (MB) dye removal from wastewater.The NAM@CuO NCs have been prepared via the sol-gel method.Their properties were analyzed using methods like UV-visible (UV) spectroscopy, Fourier transform IR spectroscopy (FTIR), thermogravimetric anal. (TGA), X-ray diffraction (XRD), point of zero charge (PZC), XPS anal., gel permeation chromatog. (GPC), and SEM- energy dispersive studies (SEM-EDX).Adsorption experiments were performed in batch mode to estimate the nanocomposite′s effectiveness, considering variables like preliminary dye concentration, pH, contact time and adsorbent dosage.The NAM@CuO NCs exhibited excellent adsorption performance under optimal conditions, achieving an excellent removal efficiency of 93.99% for MB dye.The adsorption process conformed to the pseudo-second-order kinetic model and the equilibrium data aligned well with both the Langmuir and the Freundlich isotherm models, showing an adsorption capacity of 82.44 mg/g for MB dye.Regeneration experiments demonstrated the adsorbent′s reusability, with only a 9.6% efficiency reduction after five cycles.Addnl., the catalytic reduction of MB dye using NAM@CuO NCs reached 93.99% within 210 s in the presence of NaBH₄ as a reduction agent, highlighting the rapid reduction of MB dye.This suggests that NAM@CuO NCs possess excellent catalytic activity under visible light exposure.With its high efficiency and potential for practical wastewater treatment applications, NAM@CuO NCs offer a sustainable and effective solution for the removal of methylene blue from contaminated water.