Obtaining of Brown Pigments from Concentrated Waste Water Containing Nickel

Abstract

The possibility of obtaining brown pigments with the use of blast furnace slag from waste water containing nickel is justified. The scheme of the main reactions is proposed. The kinetics of the reactions is studied. The contribution of the chemical interaction into the overall degree of treatment is established by potentiometric titration. The influence of the main factors on the degree of nickel extraction is determined. The phase composition of the formed pigment is established with the help of X-ray analysis. Rheological properties of the pigment particles are set. The main color characteristics of the obtained products are identified by visual and spectrophotometric way. X-ray microanalysis indicated the presence of the two phases in the obtained precipitate. Dispersed and phase compositions of the original slag determine the rheological properties of the pigment. By varying the synthesis parameters, the obtained patterns provide us with possibility of receiving pigments of the color from light brown to deep brown.

Pigments based on blast furnace slag from waste water

“…In the works [15,[21][22][23][24][25] the analysis of wastes, that represents potential interest as a raw material for the production of pigments is made. The use of granulated blast furnace slag as a "core" is determined by high stability of the chemical composition.…”

“…Technology for brown color pigments production from concentrated waste water is described in detail in works [13][14][15]. A good alternative to commercial pigments synthesized from pure oxides are on iron oxides-based pigments obtained from pickling solutions [16].…”

Adsorption purification of waste water from chromium by ferrite manganese

“…Adsorbents of different nature, structure and mechanism of action are used to purify chromium-containing wastewater. For example, adsorbents commonly used to purify water from chromium cations are activated by carbon, silica gel, zeolite, clay minerals, slag [11][12][13][14][15]. However, these types of adsorbents have one common drawback -they require a long separation of solution, which increases operating costs.…”

Synthesis of Magnetic Biochar for Efficient Removal of Cr(III) Cations from the Aqueous Medium

“…In recent years, research in the field of adsorption technologies has shown interesting results for the treatment of concentrated wastewater from the industry. Today, adsorbents have been synthesized to remove heavy metal cations, including highly dangerous inorganic and organic substances [6,[9][10][11].…”