Treatment of phosphogypsum waste using suitable organic extractants

El-Didamony, H.; Ali, M. M.; Awwad, Nasser S.; Fawzy, Mona M.; Attallah, M. F.

doi:10.1007/s10967-011-1547-3

Cited by 62 publications

(17 citation statements)

References 19 publications

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“…Metal recovery from solid waste or minerals may consist of pyrometallurgy or hydrometallurgy (chemical leaching or bioleaching) (El-Didamony et al 2012;Qu and Lian 2013;Yoon et al 2014;Zhang et al 2013). The extraction of metals from these leachates or waste streams can be processed by precipitation (Rabatho et al 2013), solvent extraction (Abreu and Morais 2014;Tunsu et al 2014;Vander Hoogerstraete and Binnemans 2014;Xie et al 2014), ion exchange and chelating resins (Abdel-Rahman Adel et al 2010; Barron et al 2008;Lokshin et al 2013;Xiong and Zheng 2010), extractant-impregnated resins (Lee et al 2010) and biosorption (Das and Das 2013;Hosomomi et al 2013;Oliveira et al 2012Oliveira et al , 2011Wu et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Diethylenetriamine-functionalized chitosan magnetic nano-based particles for the sorption of rare earth metal ions [Nd(III), Dy(III) and Yb(III)]

et al. 2015

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The recovery of three rare earth (RE) metals ions [Yb(III), Dy(III) and Nd(III), belonging to heavy, mild and light REs, respectively] was investigated using hybrid chitosan-magnetic nano-based particles functionalized by diethylenetriamine (DETA). The effect of pH on sorption performance was analyzed: the optimum initial pH value was found close to 5 (equilibrium pH value close to 6.5). The nanometric size of sorbent particles (30-50 nm) minimized the contribution of resistance to intraparticle diffusion on the control of uptake kinetics, which is efficiently modeled using the pseudo-second order rate equation: under selected experimental conditions the contact time required for reaching equilibrium was less than 1 h. Sorption isotherms were efficiently modeled using the Langmuir equation: maximum sorption capacities reached about 50 mg metal g -1 , regardless of the RE. The temperature had a very limited effect on sorption capacity (in the range 300-320 K). The thermodynamic parameters were determined: the sorption was endothermic (positive values of DH°), spontaneous (negative values of DG°) and contributed to increasing the disorder of the system (positive values of DS°). The three REs have similar sorption properties on DETA-functionalized chitosan magnetic nano-based particles: the selective separation of these elements seems to be difficult. The sorbed metal ions can be removed from loaded sorbents using thiourea, and the sorbent can be recycled for at least five sorption/desorption cycles with a limited loss in sorption performance (by less than 6 %). The saturation magnetization was close to 20 emu g -1 ; this means that nano-based superparamagnetic particles can be readily recovered by an external magnetic field, making the processing of these materials easy.

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Section: Introductionmentioning

confidence: 99%

Diethylenetriamine-functionalized chitosan magnetic nano-based particles for the sorption of rare earth metal ions [Nd(III), Dy(III) and Yb(III)]

et al. 2015

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“…Therefore, P2O5 has a direct effect on the constitution and hardening of Portland cement. However, the reduction percentage can be affected by different parameters such as phosphogypsum particle size, acid concentration, the mass of phosphogypsum to the mass of solution figure in addition to the number of washings [41]. Moreover, as the P2O5 increases the strength decreases until, when the P2O5 reaches 2· 25% of the cement clinker, the cement fails to meet British Standard requirements [40].…”

Section: Resultsmentioning

confidence: 99%

Calcium Hydroxide Washing Treatment of Jordanian Phosphogypsum for Utilization as Raw Material in Cement Industry

Al-Shawabkeh¹,

Abu-Hamatteh²,

Saadeh³

et al. 2019

EESRJ

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The main objective of this study is to control the hydration reaction rate of cement during its production process as phosphogypsum could be used as a substitute to natural gypsum in cement industry. However, the phosphogypsum impurities are pushing towards developing an efficient way to clean it due to their negative effect in hindering its use as an additive to the cement industry. The aim of this article is to treat phosphogypsum to be used in cement industry. To fulfil the purpose, samples from the Jordanian phosphogypsum were treated by washing with calcium hydroxide solution and then analyzed using X-ray Fluorescence Spectrometer. The analyses result of the treated samples indicated that the P2O5 percentage was reduced by around 16% after three times washing, whereas 100% removal of U was achieved. The reduction of SiO2 and Al2O3 were 42% and 20%, respectively. Ti content was reduced by 20%. According to the analyses, the radiation from phosphogypsum was negligible. Therefore, the treated Jordanian phosphogypsum can be used in cement industry. This will contribute to the reduction of waste phosphogypsum which considered as environmental concern from one side and provide cement industry with low cost raw material on the other side.

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“…Treatment of PG using suitable organic extractants was investigated with a PG sample from Egypt [26]. Different types of organic extractants, such as tributylphosphine (TBP), trioctyl phosphine oxide (TOPO), triphenyl phosphine oxide (TPPO), and di-ethyl-hexyl phosphoric acid (DEHPA), dissolved in kerosene were experimented to investigate the effect of different solvents on the removal efficiency of radionuclides and REEs from the PG.…”

Section: Leaching Of Rees By Using Organic Chemicals As the Lixiviantsmentioning

confidence: 99%

Phosphogypsum Processing for Rare Earths Recovery—A Review

Yang¹,

Salvador²,

Makkonen³

et al. 2019

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As a by-product from the phosphate fertilizer industry Phosphogypsum (PG) was considered a potentially valuable source of the rare earth elements (REEs). Because of trace concentration of REEs in the PG (normally <0.1% wt) and also their tiny and complex occurrence phases the recovery process would be highly challenging in both technology and economy. The studies on occurrences of REEs, REE recovery by physical methods and leaching using different lixiviants such as inorganic acids, H 2 SO 4 , HCl and HNO 3 , and organic chemicals, the effects of mechanical treatment of PG by microwaving and grinding on leaching efficiency of REEs, and resin-in-leach process were reviewed in the paper.

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Treatment of phosphogypsum waste using suitable organic extractants

Cited by 62 publications

References 19 publications

Diethylenetriamine-functionalized chitosan magnetic nano-based particles for the sorption of rare earth metal ions [Nd(III), Dy(III) and Yb(III)]

Diethylenetriamine-functionalized chitosan magnetic nano-based particles for the sorption of rare earth metal ions [Nd(III), Dy(III) and Yb(III)]

Calcium Hydroxide Washing Treatment of Jordanian Phosphogypsum for Utilization as Raw Material in Cement Industry

Phosphogypsum Processing for Rare Earths Recovery—A Review

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