Heavy metal removal from aqueous solutions by activated phosphate rock

Elouear, Z.; Bouzid, Jalel; Boujelben, Nesrine; Feki, M.; Jamoussi, Fakher; Montiel, A.

doi:10.1016/j.jhazmat.2007.12.036

Cited by 226 publications

(92 citation statements)

References 39 publications

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“…Since the amount of phosphate adsorbed on montmorillonite are usually lower than that found in Pb adsorption, it is expected that the effect of phosphate on Pb adsorption will not be as strong as observed in Pb on phosphate adsorption [49]. The increase of phosphate adsorption in Pb-clay mineral ascribed partly to adsorption of phosphate in mineral and partly to the formation of pyromorphite which is highly stable [14] [54]. The amount of phosphate adsorption for the mixed system was lower than the single system.…”

Section: Adsorption Of Phosphatementioning

confidence: 99%

Mutual Adsorption of Lead and Phosphorus onto Selected Soil Clay Minerals

Elsheikh¹,

Muchaonyerwa²,

Johan³

et al. 2018

ACES

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Mutual adsorption of lead (Pb) and phosphorus (P) at pH 5 onto three soil clays materials (kaolinite, montmorillonite, and allophane) was studied to know interaction of the anion and the cation at surface of the clays. Adsorption of Pb was determined on montmorillonite, kaolinite and allophane with the following pretreatments; 1) untreated clay (control), 2) phosphate treated clay (P-clay) and 3) clay pre-treated with both P and Pb (P-Pb-clay). Adsorption of P was determined on montmorillonite, kaolinite and allophane with the following pretreatments; 1) control 2) Pb treated clay (Pb-clay) and 3) P-Pb-clay. The adsorption of Pb on the untreated clays was in the order: montmorillonite > allophane > kaolinite. On allophane and kaolinite Pb adsorption was in the order P-clay > P-Pb-clay > control. For montmorillonite, the trend was: P-Pb-clay = control > P-clay. Phosphorus adsorption was in the order Pb-clay = P-Pb-clay > control for montmorillonite and kaolinite, Pb-clay > control > P-Pb-clay for allophane. The findings suggested that pre-treatment with phosphate increases Pb adsorption on kaolinite and allophane, and decrease on montmorillonite, while pretreatment with Pb increases phosphate sorption on all clays, and both Pb and P increased adsorption on montmorillonite and kaolinite and decrease on allophane.

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Section: Adsorption Of Phosphatementioning

confidence: 99%

Mutual Adsorption of Lead and Phosphorus onto Selected Soil Clay Minerals

Elsheikh¹,

Muchaonyerwa²,

Johan³

et al. 2018

ACES

View full text Add to dashboard Cite

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“…An increase in temperature involves increased mobility of the metal ions and a decrease in the retarding forces acting on the diffusing ions. These result in enhancing the adsorptive capacity of the adsorbent [36]. The temperature dependence of the adsorption process is associated with changes in several thermodynamic parameters [37].…”

Section: Adsorption Studiesmentioning

confidence: 99%

Experimental Study to Remediate Acid Fuchsin Dye Using Laccase-Modified Zeolite from Aqueous Solutions

Kalkan

Nadaroğlu

Çelebi

et al. 2015

Pol. J. Environ. Stud.

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“…Three kinetic models [19,20] represented in the following equations were applied and the reaction rate constants were determined: First order:…”

Section: Kinetic Studymentioning

confidence: 99%

Kinetics Leaching Study of Uranium from Algerian Phosphate by Sulfuric Acid

Chegrouche¹

2018

ETJ

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Abstract:The kinetics of dissolution of an Algerian phosphate in sulfuric acid has been investigated in the presence of hydrogen peroxide (H 2 O 2 ) as oxidant. The effect of different parameters such as leaching time, sulfuric acid concentration, reaction temperature have been studied in order to optimize various process parameters for maximizing the recovery of uranium. Uranium optimal dissolution efficiency of 87 % was obtained under the following conditions: after 2 h contact time, leaching using 1.5 M sulfuric acid at 50 °C and 1.5 M H 2 O 2 . A mathematical model in the following form, including the effects of parameters was established to express the dissolution kinetics of phosphate ore: 1-(1-X) 1/3 and 1-(2/3)X-(1-X) 2/3 . The activation energy for the process was found to be 12 KJ/mol. This low activation energy supported the findings that the Algerian phosphate leaching rate is controlled by diffusion process.

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Heavy metal removal from aqueous solutions by activated phosphate rock

Cited by 226 publications

References 39 publications

Mutual Adsorption of Lead and Phosphorus onto Selected Soil Clay Minerals

Mutual Adsorption of Lead and Phosphorus onto Selected Soil Clay Minerals

Experimental Study to Remediate Acid Fuchsin Dye Using Laccase-Modified Zeolite from Aqueous Solutions

Kinetics Leaching Study of Uranium from Algerian Phosphate by Sulfuric Acid

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