REE behavior and sorption on weak acid resins from buffered media

Bezzina, James P.; Ogden, Mark D.; Moon, Ellen M.; Soldenhoff, Karin

doi:10.1016/j.jiec.2017.11.005

Cited by 25 publications

(11 citation statements)

References 45 publications

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“…S4c and S6c). Elovich plots that exhibit sections of linearity, as is the case here, have been proposed to describe heterogeneous adsorption processes[40,45], which agrees with existing knowledgeof this system. Calculated parameters from fitting of the same data to the PFO model and the full range of associated R 2 values are also presented in the Supporting Information, Table S8.…”

supporting

confidence: 85%

“…This suggests that, under these experimental conditions, the intraparticle-diffusion step was not rate-limiting for the fluoride transfer on to the resin over the experimental timeframe. Similar data have been observed previously for uptake of rare earth metal ions by macroporous resins[45], which is unsurprising, as a macroporous internal structure should ensure rapid transport of the adsorbate to binding sites The plot of qt vs t 1/2 yielded a curve in many cases (Supporting Information,Fig S8band S16b). This has been proposed to indicate that boundary-layer diffusion, intraparticle diffusion and chemical reaction dominated at different uptake stages[46,47].…”

supporting

confidence: 84%

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Towards the implementation of an ion-exchange system for recovery of fluoride commodity chemicals. Kinetic and dynamic studies

Robshaw

Dawson

Bonser

2019

Chemical Engineering Journal

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supporting

confidence: 85%

supporting

confidence: 84%

Towards the implementation of an ion-exchange system for recovery of fluoride commodity chemicals. Kinetic and dynamic studies

Robshaw

Dawson

Bonser

2019

Chemical Engineering Journal

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“…A relatively high degree of affinity exists for the earth alkaline metal ions. CCEs are used primarily for the removal of cations from basic solutions (dealkalization, softening of high salinity waters), for the splitting of weakly alkaline salts of polyvalent cations, and also for the isolation and purification of biochemicals such as antibiotics, vitamins, alkaloids, and enzymes [ 51 , 52 , 53 , 54 , 55 ]. The use of CCEs for reducing the volume of radioactive waste generated in nuclear power plants was also considered [ 56 , 57 ].…”

Section: Introductionmentioning

confidence: 99%

Copper Rich Composite Materials Based on Carboxylic Cation Exchangers and Their Thermal Transformation

et al. 2021

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The effect of a cupric deposit (Cu2+, CuO) on the thermal decomposition of carboxylic cation exchangers (CCEs) is not known, and such studies may have practical significance. CCEs have a very high ion exchange capacity, so an exceptionally large amount of CuO (which is a catalyst) can be precipitated inside them. Two CCEs, macroreticular (Amberlite IRC50) and gel-like (Amberlite IRC86), served as a polymeric support to obtain copper-rich hybrid ion exchangers. Composites with CuO particles inside a polyacrylic matrix (up to 35.0 wt% Cu) were obtained. Thermal analyses under air and under N2 were performed for CCEs in the H+ and Cu2+ form with and without a CuO deposit. The results of sixteen experiments are discussed based on the TG/DTG curves and XRD patterns of the solid residues. Under air, the cupric deposit shifted the particular transformations and the ultimate polymeric matter decomposition (combustion) toward lower temperatures (even about 100–150 °C). Under N2, the reduction of the cupric deposit to metallic copper took place. Unique composite materials enriched in carbonaceous matter were obtained, as the products of polymeric matrix decomposition (free radicals and hydrogen) created an additional amount of carbon char due to the utilization of a certain amount of hydrogen to reduce Cu (II) to Cu0.

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“…With the high concentrations of iron in comparison to more valuable metals within the sewage sludge waste, it may be necessary to utilise multiple resins in order to derive value from the solid 24) . The use of a complexing weak acid as the lixiviant can allow for the higher separation of metals by adsorption, especially when considering metallic ions that have been traditionally difficult to separate (such as rare earth elements) 25) .…”

Section: Introductionmentioning

confidence: 99%

“…Industrial processes tend to focus on extraction from industrial solutions of strong acid media (e.g. HCl, H 2 SO 4 and HNO 3 ) [24][25][26][27][28][29] . This paper will focus on the extraction of problematic heavy metals (zinc, lead and copper) from buffering regions of weak organic acids utilising ion exchange resins.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Heavy Metals from Simulant Citrate Leachate of Sewage Sludge by Ion Exchange

Bezzina

Amphlett

Ogden

2018

J.I.E.

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A shortage of natural resources has led to a focus towards the use of sewage sludge as a fertiliser source due to its high phosphate content. One of the main issues with the use of sewage sludge as a fertiliser source is the concentration of heavy metals, particularly copper, lead and zinc. Economical alternatives to regular lixiviants (sulphuric acid, nitric acid, etc.) for the leaching of heavy metals from solids are weak complexing acids. Ion exchange technology offers an effective method for the recovery of these metals from the leachate. This study presents the pH dependence of Cu, Fe, Pb and Zn recovery from citrate media by the ion exchange resins TP214, MTS9100, MTS9570, MTS9301, MTS9501 and C107E. Copper recovery was found to be maximised by the use of either TP214 at a pH of 5 or MTS9301 at a pH of 2. The phosphonic acid functionality containing resins, MTS9570 and MTS9501 were found to be the most effective for the removal of iron at a pH of 2 and 5, respectively. TP214 and MTS9570 show promising results for the recovery of lead, with the caveat of large copper and iron recovery, respectively and MTS9301shows high affinity towards zinc at high pH, although poor separation from copper

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REE behavior and sorption on weak acid resins from buffered media

Cited by 25 publications

References 45 publications

Towards the implementation of an ion-exchange system for recovery of fluoride commodity chemicals. Kinetic and dynamic studies

Towards the implementation of an ion-exchange system for recovery of fluoride commodity chemicals. Kinetic and dynamic studies

Copper Rich Composite Materials Based on Carboxylic Cation Exchangers and Their Thermal Transformation

Extraction of Heavy Metals from Simulant Citrate Leachate of Sewage Sludge by Ion Exchange

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