Waste minimization pretreatment via pyrolysis and oxidative pyroylsis of organic ion exchange resin

Chun, Ung-Kyung; Choi, Kwansik; Yang, Kyung-Hwa; Park, Jong-Kil; Song, Myung‐Jae

doi:10.1016/s0956-053x(98)00020-8

Cited by 49 publications

(14 citation statements)

References 5 publications

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“…In fact, when compared to the Fenton process, generally higher values of mineralization (W (CaCO 3 )) were achieved with photo-Fenton experiments (Table 3). This result reflects the higher efficiency of the latter due to the enhanced recycling of Fe(II) by photochemical reduction of Fe(III) (reactions (7)(8)(9)). Similarly to the Fenton process, the extent of mineralization increased with [Fe(II)] 0 .…”

Section: Photo-fenton Processmentioning

confidence: 97%

Dissolution and mineralization of ion exchange resins: differentiation between heterogeneous and homogeneous (photo-)Fenton processes

Zahorodna

Oliveros

Wörner

et al. 2008

Photochem Photobiol Sci

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Section: Photo-fenton Processmentioning

confidence: 97%

Dissolution and mineralization of ion exchange resins: differentiation between heterogeneous and homogeneous (photo-)Fenton processes

Zahorodna

Oliveros

Wörner

et al. 2008

Photochem Photobiol Sci

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“…Many treatment and disposal strategies for reducing the environmental hazard arising from the generation of waste resins (some of which are radioactive waste) have been considered [ 3 , 4 , 5 ]. One of the ways of dealing with spent ion exchangers is their thermal decomposition, including incineration and pyrolysis, whereby the volume of the ion exchanger wastes is reduced and they acquire a more stable form for deposition in the environment [ 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. Pyrolysis of ion-exchange resins yields porous carbon beads [ 13 , 14 ] usable for desulfurization of fuels [ 15 ], hydrogen storage [ 16 ], CO 2 capture [ 17 , 18 ], sorption of heavy metal ions [ 19 ], benzene [ 20 ] and also in catalysis [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Weakly Hydrated Anion Exchangers Doped with Cu2O and Cu0 Particles—Thermogravimetric Studies

2021

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Hybrid ion exchangers (HIXs) containing fine Cu2O and Cu0 particles were subjected to thermal analysis in order to determine their hygroscopic water content (with regard to their anomalously low porosity) and to determine the effect of the oxidation state of the copper atom in the deposit on the thermal properties of composite materials. Commercially available anion exchangers, Amberlite IRA 900Cl (macroreticular, M) and Amberlite IRA 402OH (gel-like, G), were used as supporting materials. M/Cu2O, G/Cu2O, M/Cu and G/Cu, containing 4.3–8.4 wt% Cu, were subjected to thermal analysis under respectively air and N2. TG/DTG curves revealed that dry M/Cu and G/Cu contained as little as 7.2% and 4.3% hygroscopic water, while M/Cu2O and G/Cu2O contained respectively 10.6% and 9.4% (Cu0 was a stronger water repellent than Cu2O). The oxidation state of the copper atom in the deposit was found to affect the amount of the forming char, and also Cu0 was found to contribute to the formation of more char than in the pyrolysis of the pure resin (the anion exchanger with no copper deposit). Under air the two kinds of particles transformed into CuO, while under N2 metallic copper and char (from the resin phase) made up the solid residue. This means that in the pyrolysis of the HIXs the inorganic phase participated in char formation and it also transformed itself (undergoing reduction when possible). The above findings provide a basis for in-depth research aimed at the innovative use of copper-containing HIXs and at obtaining usable composite materials with a designed (organic-inorganic) composition.

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“…Used CFP are mostly deposited in landfill sites where they may undergo degradation and release as hazardous species that could contaminate the environment [12]. Several approaches were proposed and investigated for utilization of used CFP such as: Burning with copper oxide catalyst [13], pyrolysis for reducing the waste volume and obtaining more stable final form of waste [14,15], application as a replacement of fuel in sintering processes [16], or usage as additives to coal for coke production [17]. Apparently, most of these methods lead to degradation of CFP while it would be more beneficial if some functional materials could be obtained instead.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Functional Carbon/Magnetic Nanocomposites as A Promising Model of Utilization of Used Crosslinked Polymers

et al. 2018

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The utilization of used crosslinked functional polymers (CFP) applied as sorbents or ion-exchangers is a great challenge arising from the need to protect the environment. In this paper we report a very promising way of obtaining carbon/magnetic composites based on metal (Co2+; Ni2+; Fe3+) derivatives of butadiene rubber-based phosphorus-containing polymer, which were treated as the model used CFP. We proposed a facile one-step thermal degradation approach to transform used CFP into carbon/magnetic composites (CMC). The obtained CMCs contained a mixture of metal phosphates and metal phosphides that exhibited strong magnetic properties due to the presence of nanosized metal derivatives with diameters of 100–140 nm. Structural and morphological changes of CFP and CMC after thermal degradation were investigated by the FTIR technique, X-ray Diffraction analysis, Scanning Electron Microscope, and Atomic Force Microscope–Magnetic Force Microscope. Moreover, thermal degradation kinetics parameters were determined to optimize the efficiency of the process.

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Waste minimization pretreatment via pyrolysis and oxidative pyroylsis of organic ion exchange resin

Cited by 49 publications

References 5 publications

Dissolution and mineralization of ion exchange resins: differentiation between heterogeneous and homogeneous (photo-)Fenton processes

Dissolution and mineralization of ion exchange resins: differentiation between heterogeneous and homogeneous (photo-)Fenton processes

Weakly Hydrated Anion Exchangers Doped with Cu2O and Cu0 Particles—Thermogravimetric Studies

Fabrication of Functional Carbon/Magnetic Nanocomposites as A Promising Model of Utilization of Used Crosslinked Polymers

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