Recovery of uranium, hafnium and zirconium from petroleum ash leach liquor

The present work concerning with studying the potentiality of green algal biomasses namely Ulva lactuca Linnaeus (marine green alga) and Cladophora glomerata Linnaeus Kützing (fresh water alga) to adsorb uranium from its processing effluents of Gattar Pilot Planet, Eastern Desert, Egypt. The maximum biosorption efficiency of uranium was achieved at 1 hr contact time, 1/1000, S/l ratio, 200 ppm uranium as initial concentration, pH 4 at the room temperature using the investigated two green algal biomasses. The optimal bio-sorption values were 147.5and 287.7mg/g for U. lactuca and C. glomerata respectively. The studied algae were characterized by SEM before and after uranium bio-sorption, which showed different morphological changes such as wrinkling, protuberance and roughness with uranium bio-sorption as well as each algal type had a unique surface structure in its raw form. FTIR was used to distinguish the contributing groups which were variable and involve several mechanisms depending on uranium and algal type. The obtained experimental kinetic data were pseudo-second-order after uranium bio-sorption on U. lactuca and C. glomerata. The Langmuir isotherm model more fits the data of uranium bio-sorption than the other models (Freundlich, D-R, and Temkin).These indicating that, uranium bio-sorption process on the two green algal masses is physico-chemical monolayer mechanism. The phytochemical analyses clarify the percentage of the main constituents of the algal biomasses as (10.9 and 12,63%) of phenol, (8.3 and 15.9%) of protein and (6 and 10.16%) of carbohydrates for both U. lactuca and C. glomerata respectively .The loaded uranium was efficiently eluted by 0.1 M HCl. By applying the two green algal biomasses with fixing the optimum concluded conditions on Gatter pilot plant sample, almost of elements and nearly uranium complete concentrations were recovered from the waste water and the water can be safely reused again. However, the uranium was eluted from the concerned algae using 0.1 M HCl, while the other elements were eluted by 0.3 M EDTA and the uranium full recovery needs 3 separation cycles.

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“…The kinetics data were tested on the Lagergren (pseudo-first-order) and Ho and McKay (pseudosecond-order) models [15].…”

Section: M: Biomass Weight (G)mentioning

confidence: 99%

Uranium Bio-sorption from its Processed Waste Solution by Green Algae

Mahdy¹,

Mansour

Fouad

et al. 2020

Egypt. J. Chem.

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Recovery of Rare Earth and Some Other Potential Elements from Coal Fly Ash for Sustainable Future

Mahandra

Hubert

Ghahreman

2021

Clean Coal Technologies

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

Khalafalla

Abdellah

Khoziem

et al. 2022

J Mater Cycles Waste Manag

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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

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Recovery of uranium, hafnium and zirconium from petroleum ash leach liquor

Abstract: We investigated the optimum adsorption conditions of uranium, hafnium and zirconium elements from petroleum fly ash leach liquor using Dowex 1×8 as a strong basic anion exchange.

Cited by 5 publications

References 16 publications

Uranium Bio-sorption from its Processed Waste Solution by Green Algae

Uranium Bio-sorption from its Processed Waste Solution by Green Algae

Recovery of Rare Earth and Some Other Potential Elements from Coal Fly Ash for Sustainable Future

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

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