Ecological treatment of El Kriymat boiler ash for recovering vanadium, nickel and zinc from sulfate leach liquor

Abstract

The primary goal of this work is to develop a technology that allows for the recovery of metal values from waste products, thereby promoting the wise and efficient use of our nation's resources. To achieve this goal, an industrial waste of El Kriymat boiler fly Ash was used for recovering its content of vanadium, nickel and zinc. About 97, 95 and 99% respectively of these economic elements were first dissolved from boiler fly ash magnetic concentrate (after physical concentration). Leaching experiments using optimum conditions include: 180 g/L sulfuric acid concentration and 4% solid/solid proportion manganese dioxide acts as an oxidant at 80 °C. The recovery of vanadium (V) metal ions was carried out using 3% Alamine 336 in kerosene at an equilibrium pH value of 0.9. Subsequently, 15% sodium sulfide solution was used for co-precipitation of nickel and zinc metal ions in the raffinate solution at pH value of 3.5. Graphical Abstract

Recovery of vanadium and nickel from heavy oil fly ash (HOFA): a critical review

“…Khalafalla et al 41 leached the concentrate of petroleum fly ash in H 2 SO 4 solution with the aim at recovering V, Ni, and Zn. The fly ash is physically concentrated using high tension left magnet to raise the contents of V 2 O 5 , NiO, and ZnO to 18.1%, 11.18%, and 8.11%, respectively.…”

A Phosphonic Functionalized Biopolymer for the Sorption of Lanthanum (III) and Application in the Recovery of Rare Earth Elements

“…Leachates are contaminated liquids generated from water percolating through a solid waste disposal site, accumulating contaminants, and moving into subsurface areas. Target metal ions have been obtained by solvent extraction or direct precipitation [19][20][21][22][23][24][25]. Both these methods were used for highgrade metal ions and are inefficient for low-concentration solutions.…”