Physico-Chemical Characterization of Chemically Precipitated Nickel in a Synthetic Aqueous Media | Chapter 04 | Theory and Applications of Chemistry Vol. 3
In the liquid-liquid and solid-liquid systems there is possible to promote the chemical precipitation of certain species by controlling the physical-chemical conditions of the liquid media. In the case of solid-liquid interactions the chemical precipitates can adsorb on the surface of particles modifying their surface properties (i.e. during milling), whereas for the liquid-liquid system this precipitation contributes to clean for instance wastewater contaminated with heavy metals. In this work nickel sulfate hexahydrate (NiSO 4 ∙ 6H 2 O) was dissolved in distilled water, to establish the physicochemical conditions (pH, electrochemical potential, ionic strength, activity coefficient) that enhance the chemical precipitation of nickel species. The chemical analysis of precipitates was carried out by X-ray diffraction, Fourier transformed infrared spectrometry, and the quantitative chemical analysis of liquids was carried out by atomic absorption spectroscopy. The zeta potential of...