Migration of Trivalent Praseodymium from Tombarthite Sewage by Microtubule Ultrafiltration Reactor with Organophosphorus in Fuel Oil

Pei, Liang; Wang, Liming

doi:10.3390/ijerph19159364

Cited by 2 publications

(3 citation statements)

References 29 publications

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“…The Ho(III) Cm and steadiness of the enriched portion regularly decline while the traditional supported fluid film is used, and the Ho(III) Cm of the wastewater portion and the enriched portion remains stable when MF-OP is used. This is because the organic phosphorus in the traditional supporting fluid film is regularly lost [ 16 , 18 , 19 , 20 , 21 , 22 , 23 ], while MF-OP with organic phosphoric fluid may constantly complement the microtube microfilter with organic phosphoric fluid. The results of this study also showed that the stability of MF-OP is indeed better than that of traditional SFF.…”

Section: Resultsmentioning

confidence: 99%

“…This is on account of the revival influence of organic phosphoric fluid on microtubes and when the dispersion movement of Ho(III) is definitive under stable test state. It can be seen from previous studies that the mass transfer driving force caused by diffusion equilibrium controls the collection process of the system [ 14 , 17 , 18 , 19 , 20 ]. PH value of 4.60 has been chosen as the prime pH in this test.…”

Section: Resultsmentioning

confidence: 99%

“…This test found that nitric acid was the most active resolving reagent. According to the research of others, it can be inferred that the effect of sulfuric acid is not good, because the strong oxidation and corrosion of sulfuric acid make the organic solution unstable [ 19 , 20 ].…”

Section: Resultsmentioning

confidence: 99%

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Application Effect of MF-OP on Collection of Trivalent Holmium from Rare Earth Mining Wastewater

Liang

Sun

2023

IJERPH

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Microtube microfilter with organic phosphoric acid (expressed as MF-OP) containing a wastewater portion with buffer fluid and an enriched portion with nitric acid fluid and organic phosphoric extractant dissolved in benzin has been studied for its trivalent holmium (expressed as Ho(III) collection from rare earth wastewater. Common parameters affecting the collection effect have been investigated, including hydrogen ion molar concentration (molar concentration can be expressed as Cm) or pH value, initial concentration (expressed as Co) of Ho(III), ion-force of rare earth wastewater, voluminal proportion of organic phosphoric extractant with benzin and nitric acid fluid (expressed as Vr), nitric acid Cm, extractant Cm, and type of acid fluid in an enriched portion. The virtues of MF-OP compared to the traditional collection was explored. The impacts of hydrodynamic characteristics (steadiness and current speed) and MF parameter factors (inradius of tube, tube–shell thickness, proportion of holes) on the collection performance of MF-OP for Ho(III) collection were also considered. The test results displayed that the greatest collection conditions of Ho(III) were attained as nitric acid Cm was 4.00 mol/L, extractant Cm was 0.220 mol/L, and Vr was 0.8 in the enriched portion, and pH value was 4.60 in the wastewater portion. Ion- force of rare earth wastewater had no noticeable outcome on Ho(III) collection. The collection proportion of Ho(III) was attainable to 93.1% in 280 min, while Co was 1.80 × 10−3 mol/L.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Application Effect of MF-OP on Collection of Trivalent Holmium from Rare Earth Mining Wastewater

Liang

Sun

2023

IJERPH

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Study on Di-Phase Membrane Device with DZ272(DDD) for Purification Behavior of Divalent Cobalt Ions in Slops

Pei

Sun

2022

Toxics

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A novel Di-phase membrane device with DZ272 (DDD) containing a replenishing feed section and replenishing resolving section for the purification behavior of Co(II) has been studied. The replenishing feed section was composed of feed solution and Di-isooctylphosphinic acid (DZ272) as the carrier in fossil oil, and the replenishing resolving section was composed of DZ272 as the carrier in fossil oil and HCl as the resolving agent. The effects of the voluminal ratio of the membrane solution and feed solution (O/F), pH, initial molarity of Co(II) and ionic strength in the feed solution, voluminal ratio of membrane solution and resolving agent (O/S), molarity of H2SO4 solution and DZ272 molarity in the replenishing resolving section on purification of Co(II) were considered. The benefits of DDD compared to the traditional membrane device, system stability, reuse of the membrane solution and retention of the membrane section were also studied. Experimental results indicated that the optimal purification conditions of Co(II) were obtained, as H2SO4 molarity was 2.00 mol/L, DZ272 molarity was 0.120 mol/L, O/S was 3:1 in the replenishing resolving section, O/F was 1:8 and pH was 5.20 in the replenishing feed section. The ions intensity in the replenishing feed section had no apparent effect on purification behavior of Co(II). When the initial Co(II) molarity was 3.00 × 10−4 mol/L, the purification percentage of Co(II) achieved 93.6% in 200 min. The kinetic equation was deduced in light of the law of mass diffusivity and interfacial chemistry.

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Migration of Trivalent Praseodymium from Tombarthite Sewage by Microtubule Ultrafiltration Reactor with Organophosphorus in Fuel Oil

Cited by 2 publications

References 29 publications

Application Effect of MF-OP on Collection of Trivalent Holmium from Rare Earth Mining Wastewater

Application Effect of MF-OP on Collection of Trivalent Holmium from Rare Earth Mining Wastewater

Study on Di-Phase Membrane Device with DZ272(DDD) for Purification Behavior of Divalent Cobalt Ions in Slops

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